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FINAL FACILITY-WIDE GROUNDWATER MONITORING PROGRAM PLAN RVAAP-66 FACILITY-WIDE GROUNDWATER SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015 FORMER RAVENNA ARMY AMMUNITION PLANT PORTAGE AND TRUMBULL COUNTIES, OHIO February 20, 2015 GSA Contract Number GS-10F-0293K Delivery Order W912QR-11-F-0266 Prepared for U.S. Army Corps of Engineers 600 Martin Luther King Jr. Place Louisville, Kentucky 40202 Prepared by Environmental Quality Management, Inc. 1800 Carillon Boulevard Cincinnati, Ohio 45240

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Page 1: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

FINAL FACILITY-WIDE GROUNDWATER MONITORING PROGRAM PLAN

RVAAP-66 FACILITY-WIDE GROUNDWATER SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015

FORMER RAVENNA ARMY AMMUNITION PLANT PORTAGE AND TRUMBULL COUNTIES OHIO

February 20 2015

GSA Contract Number GS-10F-0293K Delivery Order W912QR-11-F-0266

Prepared for

US Army Corps of Engineers 600 Martin Luther King Jr Place

Louisville Kentucky 40202

Prepared by

Environmental Quality Management Inc 1800 Carillon Boulevard Cincinnati Ohio 45240

Standard Form 298 (Rev 898)

REPORT DOCUMENTATION PAGE

Prescribed by ANSI Std Z3918

Form Approved OMB No 0704-0188

The public reporting burden for this collection of information is estimated to average 1 hour per response including the time for reviewing instructions searching existing data sources gathering and maintaining the data needed and completing and reviewing the collection of information Send comments regarding this burden estimate or any other aspect of this collection of information including suggestions for reducing the burden to Department of Defense Washington Headquarters Services Directorate for Information Operations and Reports (0704-0188) 1215 Jefferson Davis Highway Suite 1204 Arlington VA 22202-4302 Respondents should be aware that notwithstanding any other provision of law no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS 1 REPORT DATE (DD-MM-YYYY) 2 REPORT TYPE 3 DATES COVERED (From - To)

4 TITLE AND SUBTITLE 5a CONTRACT NUMBER

5b GRANT NUMBER

5c PROGRAM ELEMENT NUMBER

5d PROJECT NUMBER

5e TASK NUMBER

5f WORK UNIT NUMBER

6 AUTHOR(S)

7 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8 PERFORMING ORGANIZATION REPORT NUMBER

9 SPONSORINGMONITORING AGENCY NAME(S) AND ADDRESS(ES) 10 SPONSORMONITORS ACRONYM(S)

11 SPONSORMONITORS REPORT NUMBER(S)

12 DISTRIBUTIONAVAILABILITY STATEMENT

13 SUPPLEMENTARY NOTES

14 ABSTRACT

15 SUBJECT TERMS

16 SECURITY CLASSIFICATION OF a REPORT b ABSTRACT c THIS PAGE

17 LIMITATION OF ABSTRACT

18 NUMBER OF PAGES

19a NAME OF RESPONSIBLE PERSON

19b TELEPHONE NUMBER (Include area code)

John R Kaslch Governor Mary Taylor Lt Governor Craig W Butler Director

March 9 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP

Army National Guard Directorate Remediation Response

ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties

Approval of the RVAAP-66 Final Facility-Wide Groundwater

Semiannual Groundwater Monitoring Addendum for 2015 Dated

February 20 2015 Ohio EPA ID 267-000859-036

middotDear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Final Facility Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater

Monitoring Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP)

Ravenna Ohio This document was received at Ohio EPAs Northeast District Office

(NEDO) Division of Environmental Response and Revitalization (DERR) on February

23 2015 This submittal provided satisfactory responses to Ohio EPAs comments provided in our letter dated February 4 2015 The report was prepared for the US Army

Corps of Engineers (USAGE) Louisville District by Environmental Quality Management

Inc under Contract Number W912QR-11-F-0266

These documents were reviewed by personnel from Ohio EPAs Division of

Environmental Response and Revitalization (DERR) Ohio EPA has determined that all required changes have been made to the document and considers it to be final and

approved

Pursuant to the CERCLA process the property owner usually can provide the expected

land uses to assist in ensuring that the investigation addresses all receptors for both

Northeast District Office bull 2110 East Aurora Road bull Twinsburg OH 44087middot1924

wwwepaohiogov bull (330) 963-1200 bull (330) 487middot0769 fax)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE MARCH 9 2015 PAGE2

current and future land uses Be advised that due to land use uncertainty Ohio EPA1

may require additional work in the future to address data gaps It is incumbent upon1the Army to finalize land use at Camp Ravenna as soon as possible otherwise

additional work and schedule slippage may result

If you have any questions please call me at 330-963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

co Katie Talt OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USAGE Rebecca HaneyGail Harris VISTA Sciences Corp

eo Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

CONTRACTORS STATEMENT OF INDEPENDENT TECHNICAL REVIEW

Environmental Quality Management Inc (EQM) has completed the Final Facility-Wide

Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual

Groundwater Monitoring Addendwnfor 2015 Notice is hereby given that an independent

technical review has been conducted that is appropriate to the level of risk and complexity

inherent in this project During the independent teclmical review compliance with established

policy principles and procedures utilizing justified and valid assumptions was verified This

included review of data quality objectives technical assumptions methods procedures and

materials used the appropriateness of data used and level of data obtained and reasonableness of

the results including whether the product meets the customers needs consistent with law and

existing United States Corps of Engineers policy

Scott Spesshardt G Date 7 1

Geologist

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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BKGmw-012

LL1mw-078

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LL2mw-060

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ASYmw-004

ASYmw-006

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LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

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EBGmw-125

EBGmw-127

FWGmw-002

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CPmw-4

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CBPmw-7

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CPmw-3

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LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

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ASYmw-010

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ASYmw-008

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ASYmw-007 LL12mw-243

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LL2mw-267

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LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

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SHARON WELL

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HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

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LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

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WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

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WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

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DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

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ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

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LL6mw-005

LL8mw-005

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WBGmw-021

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

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NTAmw-118

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 2: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Standard Form 298 (Rev 898)

REPORT DOCUMENTATION PAGE

Prescribed by ANSI Std Z3918

Form Approved OMB No 0704-0188

The public reporting burden for this collection of information is estimated to average 1 hour per response including the time for reviewing instructions searching existing data sources gathering and maintaining the data needed and completing and reviewing the collection of information Send comments regarding this burden estimate or any other aspect of this collection of information including suggestions for reducing the burden to Department of Defense Washington Headquarters Services Directorate for Information Operations and Reports (0704-0188) 1215 Jefferson Davis Highway Suite 1204 Arlington VA 22202-4302 Respondents should be aware that notwithstanding any other provision of law no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS 1 REPORT DATE (DD-MM-YYYY) 2 REPORT TYPE 3 DATES COVERED (From - To)

4 TITLE AND SUBTITLE 5a CONTRACT NUMBER

5b GRANT NUMBER

5c PROGRAM ELEMENT NUMBER

5d PROJECT NUMBER

5e TASK NUMBER

5f WORK UNIT NUMBER

6 AUTHOR(S)

7 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) 8 PERFORMING ORGANIZATION REPORT NUMBER

9 SPONSORINGMONITORING AGENCY NAME(S) AND ADDRESS(ES) 10 SPONSORMONITORS ACRONYM(S)

11 SPONSORMONITORS REPORT NUMBER(S)

12 DISTRIBUTIONAVAILABILITY STATEMENT

13 SUPPLEMENTARY NOTES

14 ABSTRACT

15 SUBJECT TERMS

16 SECURITY CLASSIFICATION OF a REPORT b ABSTRACT c THIS PAGE

17 LIMITATION OF ABSTRACT

18 NUMBER OF PAGES

19a NAME OF RESPONSIBLE PERSON

19b TELEPHONE NUMBER (Include area code)

John R Kaslch Governor Mary Taylor Lt Governor Craig W Butler Director

March 9 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP

Army National Guard Directorate Remediation Response

ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties

Approval of the RVAAP-66 Final Facility-Wide Groundwater

Semiannual Groundwater Monitoring Addendum for 2015 Dated

February 20 2015 Ohio EPA ID 267-000859-036

middotDear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Final Facility Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater

Monitoring Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP)

Ravenna Ohio This document was received at Ohio EPAs Northeast District Office

(NEDO) Division of Environmental Response and Revitalization (DERR) on February

23 2015 This submittal provided satisfactory responses to Ohio EPAs comments provided in our letter dated February 4 2015 The report was prepared for the US Army

Corps of Engineers (USAGE) Louisville District by Environmental Quality Management

Inc under Contract Number W912QR-11-F-0266

These documents were reviewed by personnel from Ohio EPAs Division of

Environmental Response and Revitalization (DERR) Ohio EPA has determined that all required changes have been made to the document and considers it to be final and

approved

Pursuant to the CERCLA process the property owner usually can provide the expected

land uses to assist in ensuring that the investigation addresses all receptors for both

Northeast District Office bull 2110 East Aurora Road bull Twinsburg OH 44087middot1924

wwwepaohiogov bull (330) 963-1200 bull (330) 487middot0769 fax)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE MARCH 9 2015 PAGE2

current and future land uses Be advised that due to land use uncertainty Ohio EPA1

may require additional work in the future to address data gaps It is incumbent upon1the Army to finalize land use at Camp Ravenna as soon as possible otherwise

additional work and schedule slippage may result

If you have any questions please call me at 330-963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

co Katie Talt OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USAGE Rebecca HaneyGail Harris VISTA Sciences Corp

eo Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

CONTRACTORS STATEMENT OF INDEPENDENT TECHNICAL REVIEW

Environmental Quality Management Inc (EQM) has completed the Final Facility-Wide

Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual

Groundwater Monitoring Addendwnfor 2015 Notice is hereby given that an independent

technical review has been conducted that is appropriate to the level of risk and complexity

inherent in this project During the independent teclmical review compliance with established

policy principles and procedures utilizing justified and valid assumptions was verified This

included review of data quality objectives technical assumptions methods procedures and

materials used the appropriateness of data used and level of data obtained and reasonableness of

the results including whether the product meets the customers needs consistent with law and

existing United States Corps of Engineers policy

Scott Spesshardt G Date 7 1

Geologist

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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BKGmw-012

LL1mw-078

LL1mw-063

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LL2mw-060

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ASYmw-006

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LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

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EBGmw-125

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FWGmw-002

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BKGmw-004

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CPmw-6

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CPmw-4

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CBPmw-7

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CPmw-3

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LL1mw-086

CPmw-2

CPmw-1

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LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

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LL2mw-267

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LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

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SHARON WELL

SCALE (METERS)

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HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

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DET-4

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LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

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WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

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DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

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ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

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LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

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LL6mw-005

LL8mw-005

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

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NTAmw-118

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

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MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 3: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

John R Kaslch Governor Mary Taylor Lt Governor Craig W Butler Director

March 9 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP

Army National Guard Directorate Remediation Response

ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties

Approval of the RVAAP-66 Final Facility-Wide Groundwater

Semiannual Groundwater Monitoring Addendum for 2015 Dated

February 20 2015 Ohio EPA ID 267-000859-036

middotDear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Final Facility Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater

Monitoring Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP)

Ravenna Ohio This document was received at Ohio EPAs Northeast District Office

(NEDO) Division of Environmental Response and Revitalization (DERR) on February

23 2015 This submittal provided satisfactory responses to Ohio EPAs comments provided in our letter dated February 4 2015 The report was prepared for the US Army

Corps of Engineers (USAGE) Louisville District by Environmental Quality Management

Inc under Contract Number W912QR-11-F-0266

These documents were reviewed by personnel from Ohio EPAs Division of

Environmental Response and Revitalization (DERR) Ohio EPA has determined that all required changes have been made to the document and considers it to be final and

approved

Pursuant to the CERCLA process the property owner usually can provide the expected

land uses to assist in ensuring that the investigation addresses all receptors for both

Northeast District Office bull 2110 East Aurora Road bull Twinsburg OH 44087middot1924

wwwepaohiogov bull (330) 963-1200 bull (330) 487middot0769 fax)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE MARCH 9 2015 PAGE2

current and future land uses Be advised that due to land use uncertainty Ohio EPA1

may require additional work in the future to address data gaps It is incumbent upon1the Army to finalize land use at Camp Ravenna as soon as possible otherwise

additional work and schedule slippage may result

If you have any questions please call me at 330-963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

co Katie Talt OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USAGE Rebecca HaneyGail Harris VISTA Sciences Corp

eo Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

CONTRACTORS STATEMENT OF INDEPENDENT TECHNICAL REVIEW

Environmental Quality Management Inc (EQM) has completed the Final Facility-Wide

Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual

Groundwater Monitoring Addendwnfor 2015 Notice is hereby given that an independent

technical review has been conducted that is appropriate to the level of risk and complexity

inherent in this project During the independent teclmical review compliance with established

policy principles and procedures utilizing justified and valid assumptions was verified This

included review of data quality objectives technical assumptions methods procedures and

materials used the appropriateness of data used and level of data obtained and reasonableness of

the results including whether the product meets the customers needs consistent with law and

existing United States Corps of Engineers policy

Scott Spesshardt G Date 7 1

Geologist

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

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oad

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4564000 4564000

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00

00

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4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 4: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE MARCH 9 2015 PAGE2

current and future land uses Be advised that due to land use uncertainty Ohio EPA1

may require additional work in the future to address data gaps It is incumbent upon1the Army to finalize land use at Camp Ravenna as soon as possible otherwise

additional work and schedule slippage may result

If you have any questions please call me at 330-963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

co Katie Talt OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USAGE Rebecca HaneyGail Harris VISTA Sciences Corp

eo Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

CONTRACTORS STATEMENT OF INDEPENDENT TECHNICAL REVIEW

Environmental Quality Management Inc (EQM) has completed the Final Facility-Wide

Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual

Groundwater Monitoring Addendwnfor 2015 Notice is hereby given that an independent

technical review has been conducted that is appropriate to the level of risk and complexity

inherent in this project During the independent teclmical review compliance with established

policy principles and procedures utilizing justified and valid assumptions was verified This

included review of data quality objectives technical assumptions methods procedures and

materials used the appropriateness of data used and level of data obtained and reasonableness of

the results including whether the product meets the customers needs consistent with law and

existing United States Corps of Engineers policy

Scott Spesshardt G Date 7 1

Geologist

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 5: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

CONTRACTORS STATEMENT OF INDEPENDENT TECHNICAL REVIEW

Environmental Quality Management Inc (EQM) has completed the Final Facility-Wide

Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual

Groundwater Monitoring Addendwnfor 2015 Notice is hereby given that an independent

technical review has been conducted that is appropriate to the level of risk and complexity

inherent in this project During the independent teclmical review compliance with established

policy principles and procedures utilizing justified and valid assumptions was verified This

included review of data quality objectives technical assumptions methods procedures and

materials used the appropriateness of data used and level of data obtained and reasonableness of

the results including whether the product meets the customers needs consistent with law and

existing United States Corps of Engineers policy

Scott Spesshardt G Date 7 1

Geologist

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

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d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 6: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Document Distribution for the Final

FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant

Number of Number of NameOrganization Printed Copies Electronic Copies ARNG Cleanup Program Mark Leeper 0 1 OHARNG ndash CRJMTC-ENV Env Scientist Katie Tait 0 1 ARNG Restoration Project Manager Kevin Sedlak 1 0 Ohio EPA ndash NEDO Project Coordinator Kevin Palombo 1 2 Ohio EPA ndash CO-DERR Justin Burke 0 1 RVAAP Facility Archivist Gail Harris 2 2 USACE Technical Manager Nathaniel Peters 2 3 EQM Project Manager John Miller 1 1

ARNG ndash Army National Guard OHARNG ndash CRJMTC-ENV ndash Ohio Army National Guard Camp Ravenna Joint Military Training Center ndash Environmental Ohio EPA ndash NEDO ndash Ohio Environmental Protection Agency ndash Northeast District Office Ohio EPA ndash CO-DERR ndash Ohio Environmental Protection Agency ndash Columbus ndash Division of Environmental Response ampRevitalization RVAAP ndash Ravenna Army Ammunition Plant USACE ndash US Army Corps of Engineers EQM ndash Environmental Quality Management Inc

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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indham

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FWGmw-012

B12mw-013 RQLmw-016

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RQLmw-006

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RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

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LL1mw-083

LL1mw-084

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LL1mw-081

LL2mw-270

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CBPmw-009

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LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

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LL12mw-247

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SCFmw-006

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RQLmw-007

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x x

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50

00

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4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

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LL3mw-246

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SCFmw-002

N

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LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

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4000 4564000 456

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BKGmw-006

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BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

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ASYm

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FBQmw-167

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FBQmw-176

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FBQmw-166

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FBQmw-174 LL10mw-003

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FWGmw-015

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DA2mw-115

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A

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Newton Falls RoadNewton Falls Road

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SHARON WELL

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COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

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SHARON WELL

SCALE (METERS)

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HOMEWOOD WELL

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SEMI-ANNUAL MONITORING WELL

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2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 7: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLE OF CONTENTS

Section Page Executive Summary 1 Background 1 Purpose of Addendum2 Scope of Work under the Addendum 3 pH Monitored Wells 4 New Wells 4

RCRA Wells 4 Existing CERCLA Wells 4

Schedule 5

LIST OF TABLES

1 Semiannual Monitoring Wells and Rationale 7 2 Semiannual Analyte List 10 3 Current Analytical Suite of Chemicals 12

LIST OF FIGURES

1 2015 Semiannual Wells in Eastern Portion RVAAP 2 2015 Semiannual Wells in Central Portion RVAAP 3 2015 Semiannual Wells in Western Portion RVAAP

i

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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LL1mw-078

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LL2mw-270

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LL3mw-234

LL3mw-238

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ASYmw-003

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LL2mw-060

ASYmw-002

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ASYmw-009

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ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

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EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

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BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

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CBPmw-4

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CPmw-4

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CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

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LL1mw-086

CPmw-2

CPmw-1

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LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

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LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

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LL2mw-271

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

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Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

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DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

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FBQmw-177

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LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

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Newton Falls RoadNewton Falls Road

SCFmw-001

George R

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

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NTAmw-109

MBS-003

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NTAmw-114

MBS-004

MBS-002

MBS-006

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

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REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 8: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

EXECUTIVE SUMMARY The Semiannual Groundwater Monitoring Addendum for 2015 is a supplement to the Facility-Wide Groundwater Monitoring Program Plan (FWGWMPP) and discusses the subset of existing monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) in Portage and Trumbull Counties Ohio that will be monitored in January and July 2015 and the contaminants of potential concern that will be evaluated at each selected well This document supersedes the Semiannual Monitoring Addendum for 2014 that was submitted in 2013 (finalized August 1 2013) for the groundwater sampling that began with the July 2013 event and continued through the July 2014 sampling event A total of 42 existing wells at the former RVAAP have been identified for semiannual sampling in 2015 to evaluate potential offsite migration and potential source area attenuation and temporal fluctuations Under this revised addendum wells DA2mw-114 and LL2mw-265 will not be sampled in 2015 whereas wells LL2mw-060 and LL7mw-001 have been added to the 2015 semi-annual well network In addition wells LL1mw-088 LL2mw-271 and LL3mw-246 have been formerly added to the 2015 sampling schedule (Note that these three wells were installed in December 2013 and were sampled for four consecutive quarters in 2014) Four wells (FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013) were selected for semiannual pH monitoring No other additions or deletions to the prior 2014 semi-annual well network are proposed

BACKGROUND The United States Army Corps of Engineers (USACE) Louisville District is performing Comprehensive Environmental Response Compensation and Liability Act (CERCLA) closure at the former Ravenna Army Ammunition Plant (RVAAP) located in Portage and Trumbull Counties near Ravenna Ohio CERCLA closure is occurring under the Installation Restoration Program (IRP) Activities include monitoring of an extensive network of groundwater monitoring wells During the time period of 2005 through 2007 the USACE developed a database of groundwater quality information based on the sampling of approximately 36 monitoring wells Beginning in fiscal year 2008 the USACE expanded the Facility-Wide Groundwater Monitoring Program (FWGWMP) to include the characterization of groundwater from 243 existing monitoring wells at the facility The USACE under a Government Services Administration (GSA) Performance Based Acquisition (PBA) contract retained Environmental Quality Management Inc (EQM) (Contract No GS-10F-0293K ndash Delivery Order W912QR-11-F-0266) to obtain a signed Record of Decision (ROD) for the Facility-Wide groundwater (RVAAP-66) at the former RVAAP In support of completion of a Remedial InvestigationFeasibility Study (RIFS) necessary to supplement the ROD EQM reviewed the currently available groundwater data Based on this review EQM determined that additional monitoring wells were needed at the facility to complete the RIFS and eventual ROD EQM believed that additional wells were necessary to complete hydrogeologic system modeling and to conduct contaminant fate-and-transport modeling for a Facility-Wide groundwater approach The approach for installing these wells was described in the approved Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 and supplemented by the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional

1

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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LL12mw-242

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LL12mw-187

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ASYmw-008

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ASYmw-007 LL12mw-243

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R RUSSELL 05-03-2013

2015

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J MILLER 05-06-2013

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08-14-2014

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J MILLER

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ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

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WBGmw-016

WBGmw-010

CBPmw

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WBGmw-009 WBGmw-014

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DA2mw-104

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DA2mw-113

DA2mw-109

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LL11mw-011

DA2mw-112

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LL11mw-7

LL11mw-4

LL11mw-3

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LL11mw-10

LL11mw-1

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LL4mw-194

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LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

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LL6mw-002

FBQmw-176

LL6mw-008

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LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

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LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

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LL10mw-004

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LL7mw-002 LL5mw-002

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HOMEWOOD WELL

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COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

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N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

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J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

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REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

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MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 9: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Well Installation Addendum dated September 4 2013 In accordance with these two addendums EQM has installed 41 groundwater monitoring wells to determine nature and extent of groundwater impacts provide additional information in support of hydrogeologic and fate-and-transport models evaluate potential exit pathways evaluate vertical contaminant distribution andor particle inflowoutflow through the central portion of the facility and assess potential groundwater impacts from Compliance Restoration (CR) sites A description of the initial 38 wells is presented in the approved Final Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Well Installation Report dated December 18 2012 Information regarding installation of the three additional RI wells is included in Appendix B of the Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Monitoring Report on the January 2014 Sampling Event dated May 9 2014 To supplement the RI EQM prepared the Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Semiannual Monitoring Addendum (Semiannual Monitoring Addendum January 2012) Under this addendum the facility-wide groundwater monitoring schedule was modified from a quarterly to semiannual basis (January and July events) The new RI wells were not included in the semiannual monitoring network but these wells were monitored quarterly beginning in April 2012 and overlapped with the semiannual sampling events The semiannual well network eliminated wells that provided redundancy or minimal information on groundwater quality or fate-and-transport migration A subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal andor vertical contaminant distribution provide up-gradient data for the various site-wide models assess potential exit pathway wells that had no direct association with the new wells and provide continued monitoring of the five Resource Conservation and Recovery Act (RCRA) wells at the site A total of 35 wells were selected as part of the 2012-2013 semiannual well network Besides fulfilling the selection criteria the groundwater quality information obtained from the semiannual well network was designed for incorporation into the hydrogeologic system and contaminant fate-and-transport models under the RI The Semiannual Monitoring Addendum was revised in 2013 (finalized August 1 2013) to address semi-annual monitoring beginning with the July 2013 event and continuing through the July 2014 sampling event Specifically EQM re-evaluated the semiannual monitoring well network to determine if any of the new RI wells should be permanently added to the semiannual monitoring network Additionally since the purpose of several of the semiannual wells was to provide additional data in support of the hydrogeologic and contaminant fate-and-transport models including horizontal andor vertical contaminant distribution through pairings with new RI wells their inclusion in the semiannual well network was also re-evaluated Consequently forty-two (42) wells (including the five RCRA wells and the three new RI wells) were selected for sampling during the semiannual events in 2013 and 2014

PURPOSE OF ADDENDUM The 38 original RI wells installed between February and July 2012 have been monitored for four successive quarters [Note that one well (FWGmw-009) was frozen during the January 2013 event so it was only sampled for three consecutive quarters This well was sampled for a fourth time during August 2013] The three additional RI wells installed in December 2013 have been sampled for three consecutive quarters the fourth quarter event will take place in October 2014

2

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 10: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Moving forward the primary objectives of the facility-wide monitoring well network are to assess potential exit pathways and monitor contaminant levels strictly tied to historical RVAAP activities (eg explosivespropellants volatile organic compounds semivolatile organic compounds pesticides and polychlorinated biphenyls) at selected source area wells for trend analysis Metals will also be evaluated in groundwater but their relationship to historical activities andor natural occurrence has not been fully determined EQM re-evaluated the semiannual monitoring well network to determine if any of the three new RI wells should be permanently added to the semiannual monitoring network and whether the current list of semiannual wells should be revised based on the cumulative historical and recent data As a result EQM has identified three new wells (LL1mw-088 LL2mw-271 and LL3mw-246) and one existing well (LL2mw-060) that should be incorporated into the semiannual monitoring well network as exit pathway wells several current semiannual wells (see following section for list) that should be retained as potential exit pathway or source area wells and one additional source area well (LL7mw-001) that should be added to the program to evaluate current levels of contaminants previously identified at this location that are associated with former RVAAP operations (specifically chlorinated solvents and explosives) Note that LL2mw-060 will replace LL2mw-265 in the semiannual network as an exit pathway well since the former has occasionally been found to contain low level explosives whereas well LL2mw-265 has not Several wells selected under the 2013 semiannual monitoring addendum will no longer be sampled at this time since they have not been found to contain any former operations related contaminants other than metals during the past several sampling events (ie LL2mw-265 and DA2mw-114) These wells will not be physically removed from the monitoring well network they are merely being excluded from the list of wells to be included in the 2015 semiannual groundwater monitoring well network

SCOPE OF WORK UNDER THE ADDENDUM In making the transition from an AOC approach to a facility-wide evaluation it is important to realize that the proposed monitoring well network is not intended to assess each AOC individually but rather their composite contributions to groundwater quality in the unconsolidated and bedrock aquifers Since there are numerous wells at the site the approach used was to select wells that have exhibited contaminants of potential concern (COPCs) and eliminate wells that provide redundancy or provide minimal information on groundwater quality or fate-and-transport migration To this end forty-two (42) wells (including five RCRA wells and three new RI wells) have been selected for sampling during the semiannual events in 2015 Additionally four wells have been selected for field pH and the other stabilization criteria monitoring only

3

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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LL3mw-234

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LL3mw-241

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ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

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EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

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BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

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CPmw-4

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CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

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LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

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RQLmw-008

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FWGmw-012

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LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

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LL12mw-185

LL2mw-271

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SCFmw-002

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

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BKGmw-015

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Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

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DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

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George R

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Wilcox-W

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

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NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

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MBS-001

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LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

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REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 11: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

pH Monitored Wells Selection of existing wells for semiannual pH monitoring was made based on anomalous pH values outside the typical range of natural groundwater (ie 5 to 9su) The four wells selected are FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 The monitoring will include time-series graphs New Wells In order to complete the RIFS and eventual ROD three new monitoring wells (LL1mw-088 LL2mw-271 and LL3mw-246) were installed at the facility in December 2013 to further characterize the nature and extent of facility-wide groundwater impacts The locations of the new wells and well installation and sampling procedures are described in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Additional Well Installation Addendum dated 4 September 2013 The new wells have been sampled for three successive quarters beginning in January 2014 The new wells will ultimately be sampled for four consecutive quarters for the analyte list detailed in the Final Facility-Wide Groundwater Monitoring Program Plan RVAAP-66 Facility-Wide Groundwater Addendum dated January 6 2012 The last quarterly sampling event for the three new wells is scheduled for October 2014 Based on the analytical data from these wells EQM proposes to retain these three wells (LL1mw-088 LL2mw-271 and LL3mw-246) in the semiannual sampling network They are included in the list of existing CERCLA wells described below RCRA Wells The former RCRAsolid waste wells specified by the Directorrsquos Final Findings and Orders (DFFOs) will be sampled semiannually in conjunction with the proposed semiannual sampling events for the FWGWMP wells (ie January and July) The RCRA wells include the Ramsdell Quarry Landfill wells (RQLmw-007 RQLmw-008 and RQLmw-009) and the Demolition Area 2 wells (DET-003 and DET-004) The RCRA wells will be sampled using the same protocols and procedures used for the FWGWMP wells Existing CERCLA Wells Selection of existing wells for semiannual site-wide monitoring was made based on consideration of the following criteria

bull Detectmonitor potential groundwater contamination near the downgradient facility boundary which is also downgradient of AOCs

bull Monitor specific source area wells that have consistently been found to contain COPCs associated with former RVAAP operations (eg explosivespropellants nitrate) with the primary objective of monitoring increasingdecreasing trends

bull Identifyquantify occurrence of COPCs in the unconsolidated aquifer

4

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 12: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

bull Identifyquantify occurrence of COPCs in the bedrock aquifer(s)

bull Evaluate potential hydraulic connection between unconsolidated and bedrock aquifers Use existing wells paired with or near new wells

bull Include all currently monitored RCRA wells for the Ramsdell Quarry Landfill and Demolition Area 2

bull Note that additional field work to be conducted under the Remedial Investigation Work Plan will include additional wells in the area of existing wells LL1mw-086 and LL1mw-088 to investigate the deeper unconsolidated zone and to ensure that potential contaminants are not migrating off site from LL1

On this basis the proposed network of existing CERCLA wells will include 19 potential exit pathway wells (LL1mw-064 LL1mw-065 LL1mw-086 LL1mw-087 LL1mw-088 LL2mw-059 LL2mw-060 LL2mw-271 LL3mw-244 LL3mw-246 LL12mw-247 FWGmw-004 FWGmw-007 FWGmw-011 FWGmw-012 FWGmw-015 FWGmw-016 SCFmw-002 and SCFmw-004) along the southern and eastern perimeter of former RVAAP and 18 wells (LL1mw-083 LL1mw-084 LL2mw-267 LL3mw-238 LL3mw-241 LL7mw-001 LL10mw-003 LL12mw-185 LL12mw-187 LL12mw-242 LL12mw-245 DA2mw-115 FBQ-174 NTAmw-119 WBGmw-006 WBGmw-009 WBGmw-020 and WBGmw-021) for source evaluations or to monitor horizontal andor vertical migration of contaminants from expected source areas In total 42 wells (37 CERCLA and five RCRA wells) for sampling and 4 wells for monitoring will be included as part of the semiannual monitoring well network for 2015 It is not anticipated that the wells selected for semiannual monitoring will change between monitoring events in 2015 Table 1 lists the proposed wells and rationale for their inclusion in the semiannual monitoring program Figures 1 through 3 show the wells to be sampled during the semiannual monitoring events The wells will be sampled in accordance with the Facility-Wide Sampling and Analysis Plan for Environmental Investigations Ravenna Army Ammunition Plant Ravenna Ohio (SAIC February 2011) and the two previous semiannual monitoring addendums Specifically samples will be collected using low-flow sampling procedures (with the exception of RCRA well DETmw-004 which requires the bailer method due to low yield) Metals samples will be field filtered For the selected semiannual wells the list of analytes reflects the primary constituents of concern within certain areas of the site or immediately downgradient of potential source areas as appropriate The refined analyte list for the semiannual wells is presented in Table 2 The analytical methods for these analytes are provided in Table 3 Evaluation of data from all future groundwater monitoring will be subject where applicable to the Risk Assessment and Land Use Technical Memorandum

SCHEDULE EQM will begin semiannual groundwater monitoring activities in March 2015 upon approval of this addendum

5

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

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BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

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LL2mw-264

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LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

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ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

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CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

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LL1mw-064

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LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

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LL2mw-271

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SCFmw-002

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

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BKGmw-018

BKGmw-015

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Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

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George R

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Wilcox-W

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

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NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

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LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 13: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

TABLES

6

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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a

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4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

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CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

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FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

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LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

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1000 4564561000

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DET-4

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LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

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DA2mw-104

DA2mw-106

DET-3

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DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

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LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

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LL11mw-3

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LL11mw-8

LL11mw-10

LL11mw-1

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LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

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Newton Falls RoadNewton Falls Road

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George R

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Wilcox-W

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Wilcox-W

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50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 14: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

1 SELoad Line 1 LL1mw-064 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

2 SELoad Line 1 LL1mw-065 Unconsolidated monitoring well located downgradient from Load Line 1 and serves to monitor potential GW exit pathway off of former RVAAP

3 Load Line 1 LL1mw-083 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT and 4-amino-26-DNT)

4 Load Line 1 LL1mw-084 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 24-DNT 4-amino-26-DNT and RDX)

5 SELoad Line 1 LL1mw-086

Second water-bearing zone well (deep unconsolidated) downgradient of Load Line 1 for monitoring potential GW exit pathway pesticide beta-BHC identified in groundwater at this location

6 SE LL1mw-087

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

7 Load Line 1 LL1mw-088

Unconsolidated well located downgradient of Load Line 1 and LL1mw-086 which has had pesticides Sentinel well for monitoring GW exit pathway outside perimeter fence

8 SLoad Line 2 LL2mw-059

Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP consistently found to contain the explosive 24-DNT

9 SLoad Line 2 LL2mw-060 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

10 Load Line 2 LL2mw-267 Upper Sharon source area well that has consistently been found to contain explosive constituents (24-DNT and RDX)

11 Load Line 2 LL2mw-271 Upper Sharon well located downgradient of Load Lines 2 and 3 and serves as potential GW exit pathway off of former RVAAP

12 Load Line 3 LL3mw-238 Upper Sharon source area well that has consistently been found to contain explosive constituents (246-TNT 4-amino-26-DNT and RDX)

13 Load Line 3 LL3mw-241

Upper Sharon source area well that has been found to contain explosives (246-TNT and RDX) in groundwater also used to evaluate contaminant migration pathway between Load Lines 3 amp 12

7

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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indham

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oad

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atrol R

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BKGmw-012

LL1mw-078

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EBGmw-126

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FWGmw-002

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EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

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49

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96

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00

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90

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99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 15: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

14 Load Line 3 LL3mw-244

Upper Sharon well located downgradient of Load Lines 3 and 12 consistently found to contain low level explosive constituents (2-amino-46-DNT 4-amino-26-DNT and RDX) and hexavalent chromium

15 Load Line 3 LL3mw-246

Upper Sharon well located downgradient of Load Lines 3 and 12 and affected well LL3mw-244 serves as potential GW exit pathway off of former RVAAP low levels of explosives consistently identified in well

16 Load Line 7 LL7mw-001

Homewood source area well that has historically been found to contain chlorinated solvents (specifically 11-dichloroethane 11-dichloroethene and 111-trichloroethane)

17 Load Line 10 LL10mw-003 Homewood well that has had historically consistent occurrence of VOCs (specifically carbon tetrachloride and chloroform)

18 Load Line 12 LL12mw-185 Unconsolidated well that has been found to contain elevated levels of nitrate and is downgradient of potential arsenic source

19 Load Line 12 LL12mw-187 Unconsolidated well that has been found to contain elevated levels of nitrate

20 Load Line 12 LL12mw-242 Unconsolidated well located downgradient of LL12mw-113 a potential arsenic source

21 Load Line 12 LL12mw-245 Unconsolidated well located downgradient of potential nitrate source well LL12mw-185

22 SE LL12mw-247

Unconsolidated well located approximately downgradient of Load Lines 1 2 3 4 and 12 which have been found to contain elevated concentrations of metals explosives pesticides nitrate andor PCBs Monitors potential GW exit pathway

23 Fuze and Booster FBQmw-174 Homewood source area well that has consistently been found to contain explosive constituents (24-DNT 246-TNT and 4-amino-26-DNT)

24 AdminGeorge Road FWGmw-004

Unconsolidated exit pathway well located near the south property line and downgradient of several Compliance Restoration sites

25 SW FWGmw-007 Unconsolidated well located in the western portion of former RVAAP Potential exit pathway well near Hinkley Creek

26 East Classification Yard FWGmw-011

Unconsolidated well located east of Ramsdell Quarry and former East Classification Yard Serves as exit pathway well

27 East Classification Yard FWGmw-012 Upper Sharon formation well paired with FWGmw-011

serves as exit pathway well for the Sharon aquifer

8

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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LL12mw-187

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ASYmw-010

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ASYmw-008

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HOMEWOOD WELL

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COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

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SEMI-ANNUAL WELLS

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08-14-2014

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J MILLER

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ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

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LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

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DA2mw-107

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DA2mw-111

DA2mw-113

DA2mw-109

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LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

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LL4mw-198

LL4mw-194

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LL10mw-006

LL5mw-003

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LL4mw-195

LL6mw-001

LL4m

FBQmw-167

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FBQmw-176

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LL8mw-001

LL8mw-003

LL8mw-002

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FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

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LL8mw-005

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WBGmw-006

WBGmw-021

WBGmw-020

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SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

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COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

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N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

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SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

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SEMI-ANNUAL WELLS

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REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

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J MILLER

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ENVIRONMENTAL QUALITY

MANAGEMENT INC

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AS SHOWN

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

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MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 16: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 1 (continued) Semiannual Monitoring Wells and Rationale

No RVAAP-66 Area

Well Location RationaleComments

28 AdminGeorge Road FWGmw-015

Unconsolidated well Located near the south property line and downgradient of several Compliance Restoration sites Serves as first-water unconsolidated exit pathway well

29 AdminGeorge Road FWGmw-016

Upper Sharon well paired with FWGmw-015 Located near the south property line and downgradient of several Compliance Restoration sites Serves as upper Sharon formation exit pathway well

30 NACA Test NTAmw-119

Deep unconsolidated well that has been found to contain trace amounts of tetrachloroethene naphthalene as well as metals Monitors second water-bearing zone in buried valley unconsolidated

31 Demo Area 2 DA2mw-115 Upper Sharon well paired with well DETmw-003 serves to monitor potential vertical migration in this area of the site

32 Demo Area 2 DETmw-003 Unconsolidated RCRA well

33 Demo Area 2 DETmw-004 Unconsolidated RCRA well

34 Ramsdell Quarry RQLmw-007 Upper Sharon RCRA well

35 Ramsdell Quarry RQLmw-008 Upper Sharon RCRA well

36 Ramsdell Quarry RQLmw-009 Upper Sharon RCRA well

37 SE SCFmw-002

Sharon Conglomerate Member well located downgradient of Atlas Scrap Yard and Load Lines 1 2 3 4 and 12 paired with LL12mw-247 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

38 SE SCFmw-004

Sharon Conglomerate Member well located downgradient of Load Lines 1 and 2 paired with LL1mw-087 and selected for monitoring the potential GW exit pathway off of former RVAAP in the deeper aquifer

39 Winklepeck WBGmw-006 Unconsolidated well paired with WBGmw-021 source area well has been found to contain explosives (RDX)

40 Winklepeck WBGmw-009 Unconsolidated well paired with WBGmw-020 source area well has been found to contain explosive constituents (RDX)

41 Winklepeck WBGmw-020 Upper Sharon well paired with WBGmw-009 source area well for monitoring potential vertical migration in Sharon aquifer

42 Winklepeck WBGmw-021 Upper Sharon well paired with WBGmw-006 source area well for monitoring potential vertical migration in Sharon aquifer

Note ndash unless otherwise stated all wells were completed in the first water-bearing zone identified during well installation

9

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

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COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

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J MILLER 05-06-2013

SEMI-ANNUAL WELLS

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REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

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SEMI-ANNUAL MONITORING WELL

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N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

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HOMEWOOD WELL

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SEMI-ANNUAL MONITORING WELL

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REVISED SEMI-ANNUAL MONITORING WELLS

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ENVIRONMENTAL QUALITY

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Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 17: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

LL1mw-064 x x x LL1mw-065 x x x LL1mw-083 x x x x LL1mw-084 x x x x LL1mw-086 x x x x LL1mw-087 x x x LL1mw-088 x x x x LL2mw-059 x x x LL2mw-060 x x x LL2mw-267 x x x LL2mw-271 x x x x LL3mw-238 x x x x LL3mw-241 x x x x LL3mw-244 x x x x x LL3mw-246 x x x x LL7mw-001 x x x x LL10mw-003 x x x

LL12mw-185 x (As only) x

LL12mw-187 x x x x LL12mw-242 x x x x LL12mw-245 x x x x LL12mw-247 x x x x x FBQmw-174 x x x x FWGmw-004 x x x FWGmw-007 x x x FWGmw-011 x x x

10

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

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96

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49

70

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4

97

0

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49

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98

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49

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FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

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49

40

00

49

50

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FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

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N

o

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h

P

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x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 18: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 2 (continued) Semiannual Analyte List Analytes

Well Location VOCs

SVOCs

Metalsd Explosives Propellants Pesticides PCBs Nitrate Cyanide Hexavalent

Chromiumd Perchlorate Nitroaromatics amp Phthalatesa Phenolsb PAHsc

FWGmw-012 x x x FWGmw-015 x x x FWGmw-016 x x x NTAmw-119 x x x x x DA2mw-115 x x x DET-003 x x x x x x x x x DET-004 x x x x x x x x x RQLmw-007 x x x x x x x x x RQLmw-008 x x x x x x x x x RQLmw-009 x x x x x x x x x SCFmw-002 x x x x x SCFmw-004 x x x x WBGmw-006 x x x WBGmw-009 x x x WBGmw-020 x x x WBGmw-021 x x x

a Analyte list includes 24-Dinitrotoluene 26-Dinitrotoluene Bis(2-ethylhexyl)phthalate Butyl benzyl phthalate Diethyl phthalate Dimethyl phthalate Di-n-butyl phthalate Di-n-octyl phthalate and Nitrobenzene

b Analyte list includes 245-Trichlorophenol 246-Trichlorophenol 24-Dichlorophenol 24-Dimethylphenol 24-Dinitrophenol 2-Chlorophenol 2-Methylphenol 2-Nitrophenol 46-Dinitro-2-methylphenol 4-Chloro-3-methylphenol 3amp4 Methylphenol 4-Nitrophenol Pentachlorophenol and Phenol

c Analyte list includes Acenaphthene Acenaphthylene Anthracene Benzo(a)anthracene Benzo(a)pyrene Benzo(b)fluoranthene Benzo(ghi)perylene Benzo(k)fluoranthene Chrysene Dibenzo(ah)anthracene Fluoranthene Fluorene Indeno(123-cd)pyrene Naphthalene Phenanthrene and Pyrene

d Analyte list includes Aluminum Antimony Arsenic Barium Beryllium Cadmium Calcium Chromium Cobalt Copper Iron Lead Magnesium Manganese Mercury Nickel Potassium Selenium Silver Sodium Thallium Vanadium and Zinc Hexavalent chromium will be sampled semiannually in wells LL3mw-244 LL12mw-247 and SCFmw-002

11

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 19: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

Table 3 Current Analytical Suite of Chemicals Constituents Method1

Polychlorinated biphenyls (PCBs)

Gas Chromatograph (GC) ndash Semivolatile Organics (SVOCs) (8082)

Pesticides GC Semivolatile Organics (8081A)

BaseNeutrals and Acids (SVOCs)

GCMass Spectrograph (MS) Semivolatile Organics (8270C)

Volatile Organic Compounds (VOCs)

GCMS Volatile Organics (8260B)

Nitroguanidine (Propellant)

Organic compounds by UVHPLC (8330 modified)

Nitroaromatics amp Nitramines (Explosives)

GC Semivolatile Organics Explosives (8330)

Nitrocellulose (Propellant)

General Chemistry (WS-WC-0050)

NitrateNitrites General Chemistry (3532)2 Cyanide (Total) General Chemistry

(9012A) Metals (Magnesium Manga-nese Barium Nickel Potassium Silver Sodium Vanadium Chromium Calcium Cobalt Copper Arsenic Lead Selenium)

Inductively Coupled Plasma (6010B)

Metals (Antimony Iron Beryllium Thallium Zinc Cadmium Aluminum)

Inductively Coupled Plasma Mass Spectrometry (6020)

Hexavalent Chromium Method 21862 Mercury Liquid Waste Cold Vapor

Technique (7470A) Perchlorate Method 6860

1 = USEPA SW846 2 = EPA Methods for Chemical Analysis of Water and Waste

12

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

a

d

N

o

r

t

h

L

in

e

R

o

a

d

H

in

k

le

y

C

r

e

e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 20: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

FIGURES

S

a

n

d

C

r

e

e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

o

r

t

h

P

a

t

r

o

l

R

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a

d

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k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 21: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

S

a

n

d

C

r

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e

k

Paris W

indham

R

oad

East P

atrol R

oad

x

x

Creek

8)

4564000 4564000

50

00

00

4563000 4563000

4562000 4562000

4561000 4561000

4560000 4560000

4559000 4559000

EBGmw-131

BKGmw-008

RQLmw-014

RQLmw-013

RQLmw-010

RQLmw-007

RQLmw-011

B12mw-012

RQLmw-015

RQLmw-012

B12mw-011

FWGmw-012

B12mw-013 RQLmw-016

BKGmw-010

RQLmw-009

RQLmw-006

B12mw-010 RQLmw-008

RQLmw-017

LL1mw-067

BKGmw-012

LL1mw-078

LL1mw-063

LL1mw-083

LL1mw-084

LL1mw-079

LL1mw-081

LL2mw-270

LL2mw-262

LL1mw-082

LL1mw-080

LL2mw-261

LL3mw-232

LL2mw-266

LL1mw-085

CBPmw-009

LL2mw-263

LL3mw-233

LL2mw-267

LL2mw-264

LL3mw-235

LL3mw-236

LL2mw-268

LL2mw-269

LL3mw-234

LL3mw-238

LL3mw-241

LL3mw-237

LL3mw-245

ASYmw-003

ASYmw-005 LL3mw-239 LL2mw-059

LL2mw-060

ASYmw-002

LL12mw-113

ASYmw-009

LL3mw-240

ASYmw-004

ASYmw-006

LL2mw-265

LL3mw-242

LL3mw-243

LL3mw-244

LL4mw-201

EBGmw-126

EBGmw-123

EBGmw-129

EBGmw-124

EBGmw-125

EBGmw-127

FWGmw-002

BKGmw-021

EBGmw-130

EBGmw-128

BKGmw-004

FWGmw-011

CBPmw-8

CPmw-6

CBPmw-5

CBPmw-4

CPmw-5

CBPmw-6

CPmw-4

LL1mw-064

CBPmw-3

CBPmw-1

CBPmw-7

CBPmw-2

CPmw-3

LL1mw-065

LL1mw-086

CPmw-2

CPmw-1

LL1mw-087

LL12mw-242

LL12mw-154

LL12mw-187

LL12mw-244

LL12mw-128

LL12mw-185

ASYmw-010

LL12mw-246

ASYmw-008

LL12mw-088

ASYmw-007 LL12mw-243

LL12mw-182ss

LL12mw-107

LL12mw-245

LL12mw-182

LL12mw-247

LL4mw-200

LL4mw-199

49

60

00

4

96

0

00

49

70

00

4

97

0

00

49

80

00

4

98

0

00

49

90

00

4

99

0

00

FWGmw-001

FWGmw-010

SCFmw-006

SCFmw-005

SCFmw-004

SCFmw-003

SCFmw-002

RQLmw-007

RQLmw-009

RQLmw-008

x x

LL3mw-244

50

00

00

4558000 4558000

FWGmw-011

FWGmw-012

LL1mw-083

LL1mw-084

LL1mw-064

LL1mw-088LL1mw-088

LL2mw-267

LL1mw-065

LL1mw-086

LL1mw-087

SCFmw-004

LL3mw-241

LL3mw-238

LL2mw-059

LL2mw-060

LL12mw-242

LL12mw-187

LL12mw-185

LL2mw-271

LL12mw-245

LL3mw-246

LL12mw-247

SCFmw-002

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN EASTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 1 2

x

South Fork Eagle

Smalley Road (CH 22

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

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x

N

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4563000 4563000 4563000

4562000 4562000

x

x

x

x

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FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

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48

60

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48

70

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State R

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State R

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48

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NTAmw-119

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48

90

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South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 22: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

S

a

n

d

C

r

e

e

k

S

a

n

d

C

r

e

e

k

4000 4564000 456

x

x

x

BKGmw-006

BKGmw-018

BKGmw-015

South Fork Eagle Cr

Smalley Road (CH 228)

3000 4563 000 456

2000 4564562000

1000 4564561000

0000 4564560000

9000 4554559000

8000 4554558000

DET-3

DET-4

LNWMW-025

LNWmw-024

LNWmw-026

LNWmw-027

WBGmw-006

WBGmw-017

WBGmw-005

WBGmw-016

WBGmw-010

CBPmw

WBGmw-018

WBGmw-011

CBP

WBGmw-015

WBGmw-012

WBGmw-007

WBGmw-009 WBGmw-014

WBGmw-013 WBGmw-008

CBPmw

DA2mw-104

DA2mw-106

DET-3

CBP

DET-2

DET-4

DA2mw-105

DA2mw-107

DA2mw-108

BKGmw-019

DA2mw-111

DA2mw-113

DA2mw-109

BKGmw-020

LL11mw-6 LL11mw-5 DA2mw-110

LL11mw-011

DA2mw-112

LL11mw-2

LL11mw-7

LL11mw-4

LL11mw-3

BKGmw-013

LL11mw-8

LL11mw-10

LL11mw-1

LL11mw-9

ASYm

ASYmw-0

LL4mw-197

LL4mw-198

LL4mw-194

LL4mw-193

LL10mw-006

LL5mw-003

LL4mw-196

LL4mw-195

LL6mw-001

LL4m

FBQmw-167

LL6mw-002

FBQmw-176

LL6mw-008

FBQmw-166

LL6mw-006

LL8mw-001

LL8mw-003

LL8mw-002

LL8mw-004

FWGmw-015

LL9mw-005

LL9mw-007

LL9mw-002

LL9mw-006

LL9mw-003

LL7mw-006

LL7mw-004

LL9mw-001

LL9mw-004

FBQmw-173

LL7mw-003

LL10mw-001

FBQmw-174 LL10mw-003

LL10mw-002

LL7mw-005

FBQmw-171

LL10mw-004

LL10mw-005

LL7mw-002 LL5mw-002

FBQmw-172

LL7mw-001

LL5mw-001

FBQmw-169

LL6mw-003

LL5mw-005

FBQmw-175

FBQmw-170

LL5mw-004

FBQmw-168

LL6mw-004

LL5mw-006

LL6mw-009

FBQmw-177

LL6mw-007

LL6mw-005

LL8mw-005

LL8mw-006

WBGmw-006

WBGmw-021

WBGmw-020

WBGmw-009

DA2mw-115

FBQmw-174 LL10mw-003

LL7mw-001

FWGmw-015

FWGmw-004

FWGmw-016

WBGmw-021

WBGmw-019

WBGmw-020

DA2mw-115

DA2mw-114

FWGmw-013

LL11mw-012

A

ASYmw-

ASYmw-0

LL4m

Newton Falls RoadNewton Falls Road

SCFmw-001

George R

oad

George R

oad

Wilcox-W

ayland R

oad

Wilcox-W

ayland R

oad

49

10

00

49

20

00

49

30

00

49

40

00

49

50

00

FWGmw-016

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

N SEMI-ANNUAL WELLS

J MILLER 05-06-2013

2 REVISED SEMI-ANNUAL MONITORING WELLS 10-09-2014 J MILLER

IN CENTRAL PORTION RVAAP

ENVIRONMENTAL QUALITY

J MILLER 1 REVISED SEMI-ANNUAL MONITORING WELLS 08-14-2014

MANAGEMENT INC

AS SHOWN

0301740016 FIGURE 2B

FWGmw-004

2

x

x

x

x

x

N

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in

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C

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4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

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reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

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n

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f

R

o

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d

4562000

7

4561000

4560000

4559000

4558000

49

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rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 23: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

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x

x

x

x

N

o

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t

h

P

a

t

r

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o

a

d

H

i

n

k

l

e

y

C

r

e

e

k

N

o

r

t

h

L

in

e

R

o

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L

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in

k

le

y

C

r

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e

k

H

in

k

le

y

C

r

e

e

k

4563000 4563000 4563000

4562000 4562000

x

x

x

x

x

FWGmw-003

BKGmw-005

BKGmw-017

FWGmw-014

FWGmw-009

FWGmw-008

BKGmw-016

NTAmw-113

NTAmw-108

NTAmw-115

FWGmw-006

NTAmw-112

NTAmw-110

NTAmw-111

NTAmw-116

NTAmw-107

NTAmw-109

MBS-003

NTAmw-119

NTAmw-118

NTAmw-11

NTAmw-114

MBS-004

MBS-002

MBS-006

MBS-005

MBS-001

FWGmw-007

4561000

4560000

4559000

4558000

4561000

4560000

4559000

4558000

48

50

00

48

60

00

48

70

00

State R

oute 80 F

reedom

R

oad

State R

oute 80 F

reedom

R

oad

48

80

00

NTAmw-119

FWGmw-007

48

90

00

South PatSouth Pat

CBLmw-004

CBLmw-003

CBLmw-001

CBLmw-002

CBLmw-005

FWGmw-005

N

0 500 1000

LEGEND

SHARON WELL

SCALE (METERS)

UNCONSOLIDATED WELL

HOMEWOOD WELL

RCRA WELL

COORDINATE SYSTEM UTM NAD 83 ZONE 17

SEMI-ANNUAL MONITORING WELL

R RUSSELL 05-03-2013

2015

S SPESSHARDT 05-06-2013

J MILLER 05-06-2013

SEMI-ANNUAL WELLS

1

2

REVISED SEMI-ANNUAL MONITORING WELLS

REVISED SEMI-ANNUAL MONITORING WELLS

08-14-2014

10-09-2014

J MILLER

J MILLER

ENVIRONMENTAL QUALITY

MANAGEMENT INC

IN WESTERN PORTION RVAAP

AS SHOWN

B 0301740016 FIGURE 3 2

G

r

e

e

n

l

e

a

f

R

o

a

d

4562000

7

4561000

4560000

4559000

4558000

49

00

00

rol Roadrol Road

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 24: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Former RVAAP FWGWMP Semiannual Groundwater Monitoring Addendum for 2015

APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 25: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

O hio EPA John R lltasich Governor

Mary Taylor Lt Governor

Craig W Butler Director

February 4 2015

Mr Mark Leeper Re US Army Ammunition Pit RVAAP Army National Guard Directorate Remediation Response ARNGD-ILE Clean Up Project Records 111 South George Mason Drive Remedial Response Arlington VA 22204 Portage County

267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Approval with Modifications on the RVAAP-66 Draft Facility-Wide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 for the Ravenna Army Ammunition Plant Ravenna Ohio Dated December 19 2014 Ohio EPA ID 267-000859-036

Dear Mr Leeper

The Ohio Environmental Protection Agency (Ohio EPA) has received the Draft FacilityshyWide Groundwater Monitoring Program RVAAP-66 Semiannual Groundwater Addendum for 2015 at the Ravenna Army Ammunition Plant (RVAAP) Ravenna Ohio This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Response and Revitalization (DERR) on December 22 2014 The report was prepared for the US Army Corps of Engineers (USACE) Louisville District by Environmental Quality Management Inc under Contract Number W912QR-11-F-0266

Pursuant to The Directors Findings and Orders Paragraph 39 (b) Ohio EPA approves the submittal upon specified conditions as presented below

Ohio EPAs November 25 2014 comments and the National Guard s December 19 2014 responses to those comments are presented below along with Ohio EPAs current response

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be

Northeast District Office 2110 East Aurora Road bull Twinsburg OH 44087 1924 rm m~OW[g wwwepa ohogov bull (330) 963-1200 bull (330) 487-0769 (fax) lf)(o~- d -toS JlLJ

f[I -

~

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 26: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 2

consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Army National Guard Response This is the first correspondence that we have received in which the Ohio EPA has mentioned that they discourage the use of the - term -overbtirden We will change the term middot overburden to unconsolidated in Table 1

Ohio EPAs Response to The National Guards Response to Comment 1 The National Guard s response adequately addresses Ohio EPAs Comment 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17 of the wells to be monitored are screened in the first or uppermost water-bearing zone in the unconsolidated glacial material and two of the wells to be monitored are screened in the second water bearing zone or deep portion of the unconsolidated glacial material It is unclear if there are one or two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have the same potentiometric surface and to what extent the two zones are inte rconnected

Army National Guard Response During installation of the preliminary RI wells in 201-r ~ 9 wells were completed in the unconsolidated- aquifer which was the first water-bearing zone encountered However three of these wells (FWGmw-002 LL 1 mw-086 and NTAmw-119) were completed in an apparent second water- bearing zone within deeper unconsolidated strata It was originally intended that these three wells would be completed in bedrock to monitor vertical migratiomiddotn in these areas of the site However due to the thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the first and second water-bearing zones in the unconsolidated material and the predicted communication between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and NTAmw-119 appear to be associated with a suspected buried tributary val ley to the Mahoning River which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950)

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 27: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 3

(Note that the unconsolidated deposits at LL 11 mw-012 were also more than 70-ft-thick this well which was ultimately completed in shale would also be within the tributary valley mentioned above) These locations were the oniy ones identified with thick (ie gt70 feet) unconsolidated deposits at the former RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including the depth to bedrock where encountered Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated water-bearing strata and the deeper unconsolidated watershybearing strata for these three locations during six sampling and well gauging events between July 2012 and July 2014 (Note that well LL 1mw-088 was not installed until December 2013) In general the potentiometric surface elevations show that the shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA s Response to The National Guards Response to Comment 2 The National Guard s response adequately addresses Ohio EPAs Comment 2

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mwshy086 and LL1 mw-088 The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1 indicates that Well LL1 mw-086 screened in the second (deep) ground water zone in the unconsolidated glacial till is paired with sentinel well LL 1 mw-088 screened in the first ground water zone in the unconsolidated glacial till LL1mwshy088 is a new well that was installed in December 2013 LL 1 mw-086 is located downgradient of Load Line 1 and LL 1 mw-088 is located downgradient of LL 1 mw-086 and outside the perimeter fence Considering these wells relationship to each other it is unclear how this well pair is being used to determine horizontal and vertical extent This needs to be explained

Army National Guard Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx 75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the upper and lower portions of the unconsolidated material As mentioned previously the groundwater elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing zones within the unconsolidated strata are in hydraulic communication in this area of the Site

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 28: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPE R ARM Y NATIONAL GUARD DIRECTORATE February 4 201 5 PAGE 4

Ohio EPAs Response to The National Guards Response to Comment 3 Ohio EPA believes that although the potentiometric surface is similar between the two locations (LL 1 mw-086 approximate depth 75 feet and LL 1-088 approximate depth 24 feet) we are middotnot confident that deeper contaminants identified in LL1-mw-086 could be picked up in the shallow LL 1 mw-088 Ohio EPA understands that LL 1 mw-088 still serves the purpose of identifying potential migration of contaminants in the shallow ground water We will anticipate however that the RI Work Plan will include additional wells in this area (deeper unconsolidated zone) to ensure potential contaminants are not migrating off site from LL1

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not be appropriate for representing background water quality at the facility It needs to be clarified which of the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale that was used to select these wells

Army National Guard Response The second paragraph on page 2 of the 2015 middot SAGWMA discusses the rationale for the initial 2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the statement provide up-gradient data for the various site-wide models was one of several listed justifications for the monitoring well network presented in the 2012shy2013 Semiannual Groundwater Monitoring Addendum (EQM January 2012) During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current network of background (BKG) wells was insufficient for determining background conditions at the former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their comment letter dated January 16 2014 that the number of proposed background wells may not be sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP including installation of additional wells for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015 is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations at selected source area wells No specific upgrad ient wells were selected for monitoring at this time since the existing background data is not consider~d relevant The data

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 29: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARMY NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 5

generated from the proposed semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be prepared as part of the future RI work

Ohio EPAs Response to The National Guards Response to Comment 4 The National Guard s response adequately addresses Ohio EPAs Comment 4

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells that appear to have consistently had anomalous pH values include FWGmw-002 RQLmw-011 ROLmw-012 and RQLmw-013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water Monitoring Program Plan measured as part of semiannual sampling

Army National Guard Response Wells FWGmw-002 ROLmw-011 ROLmwshy012 and RQLmw-013 will be monitored for pH and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPAs Response to The National Guards Response to Comment 5 The National Guard s response adequately addresses Ohio EPAs Comment 5

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL 1 mw-088 and LL2mw-271 ) thallium (LL2mwshy271 ) cobalt (LL2mw-271 ) and manganese (LL3mw-246) exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of perchlorates and explosivespropellants present in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees in principle with the National Guard s proposal at the May 21 2014 RAB Meeting to install three additional monitoring wells near the southeast corner of the facility near Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 30: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARM Y NATIONAL GUARD DIRECTORATE February 4 2015 PAGE 6

sampling data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

Army National Guard Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and submitting a Request for Proposal to eligible contractors to continue the RlFS work at the former RVAAP Following selection of a Contractor to complete the RI efforts a RlFS Work Plan will be prepared with details regarding the location and construction of any additional RI wells at the former RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the FWGWMP A schedule for completing this work will be provided as part of the RlFS Work Plan

Ohio EPAs Response to The National Guards Response to Comment 6 The National Guard s response adequately addresses Ohio EPAs Comment 6

Ohio EPA Comment 7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-271 and LL3mw-246) collected during the January 2014 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Army National Guard Response Historically each well at RVAAP bas only been sampled once for perchlorates There have been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J ugL to 019 ugL (note that the RSL is 14 ugL and the Interim Drinking Water Health Advisory is 15 ugL) Given the locations of the detections in LL2mw-271 and LL3MW-246 (i e outside the perimeter fence) the Army will include perchlorates in the semiannual sampling for these two wells in 2015

Ohio EPAs Response to The National Guards Response to Comment 7 The National Guard s response adequately addresses Ohio EPA s Comment 7

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 31: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR MARK LEEPER ARMY NATI ONAL GUARD DIRE CTORATE Februa ry 4 20 15 PAGE 7

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at camp Ravenna as soon as possible otherwise additional work and schedule slippage may result

If you have any questions please call me at (330) 963-1292

Sincerely

Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnv r

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris VISTA Sciences Corp

ec Susan Netzley-Watkins Ohio EPA NEDO DERR Rodney Beals Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Albert Muller Ohio EPA NEDO DDAGW

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 32: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

December 19 2014

Ohio Environmental Protection Agency

DERR-NEDO

Attn Mr Kevin Palombo

2110 East Aurora Road

Twinsburg OH 44087-1924

Subject Ravenna Army Ammunition Plant (RVAAP) Restoration Program

PortageTrumbull Counties

RVAAP-66 Facility-Wide Groundwater

Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015

Ohio EPA ID 267-000859-036

Dear Mr Palombo

On December 1 2014 the Army received a letter of correspondence from the Ohio Environmental

Protection Agency (Ohio EPA) dated November 25 2014 The letter presented the Ohio EPA comments

on the Draft Facility-Wide Groundwater Semiannual Groundwater Addendum for 2015rdquo for the Ravenna

Army Ammunition Plant in PortageTrumbull Counties Ohio Below please find the responses to the

Ohio EPA comments This document was prepared for the US Army Corps of Engineers (USACE) -

Louisville District by Environmental Quality Management Inc under Contract No W912QR-11-F-

0266

Ohio EPA Comment 1 Inconsistency in the Naming of Ground Water Zones

Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as ldquooverburdenrdquo

wells or as ldquounconsolidatedrdquo wells This is unnecessarily confusing The identifying name of the

hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the

use of the term ldquooverburdenrdquo because it is ambiguous and not appropriate ldquoOverburdenrdquo is a mining

term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful

material (eg gravel ore and coal) that are mined from the surface by open cuts

Response This is the first correspondence that we have received in which the Ohio EPA has mentioned

that they discourage the use of the term ldquooverburdenrdquo We will change the term ldquooverburdenrdquo to

ldquounconsolidatedrdquo in Table 1

Ohio EPA Comment 2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates

that 17 of the wells to be monitored are screened in the ldquofirstrdquo or ldquouppermost water-bearing zonerdquo in the

unconsolidated glacial material and two of the wells to be monitored are screened in the ldquosecond water

bearing zonerdquo or ldquodeeprdquo portion of the unconsolidated glacial material It is unclear if there are one or

two hydrostratigraphic zones within the unconsolidated glacial material beneath the RVAAP In order to

assure that the facility is adequately monitored it needs to be clarified if the two ground water zones have

the same potentiometric surface and to what extent the two zones are interconnected

Response During installation of the preliminary RI wells in 2012 19 wells were completed in the

unconsolidated aquifer which was the first water-bearing zone encountered However three of these

wells (FWGmw-002 LL1mw-086 and NTAmw-119) were completed in an apparent second water-

bearing zone within deeper unconsolidated strata It was originally intended that these three wells would

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 33: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

be completed in bedrock to monitor vertical migration in these areas of the site However due to the

thickness of the unconsolidated material (greater than 70-ft-thick) the presence of clay till between the

first and second water-bearing zones in the unconsolidated material and the predicted communication

between these deeper unconsolidated strata and the upper portion of the bedrock aquifer it was concluded

that the second water-bearing zone at these locations should be evaluated Wells FWGmw-002 and

NTAmw-119 appear to be associated with a suspected buried tributary valley to the Mahoning River

which has been mentioned in prior RVAAP documents (USATHAMA 1978 and Barnes 1950) (Note

that the unconsolidated deposits at LL11mw-012 were also more than 70-ft-thick this well which was

ultimately completed in shale would also be within the tributary valley mentioned above) These

locations were the only ones identified with thick (ie gt70 feet) unconsolidated deposits at the former

RVAAP Table 1 summarizes the well completion information for the 284 wells at RVAAP including

the depth to bedrock where encountered

Table 2 shows the well comparisons and vertical hydraulic gradients between the upper consolidated

water-bearing strata and the deeper unconsolidated water-bearing strata for these three locations during

six sampling and well gauging events between July 2012 and July 2014 (Note that well LL1mw-088 was

not installed until December 2013) In general the potentiometric surface elevations show that the

shallow and deep unconsolidated water-bearing strata are disparate aquifers In addition the vertical

hydraulic gradients indicate a downward vertical gradient from the upper to lower water-bearing zones

Ohio EPA Comment 3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088

The SAGWMA indicates (page 2) that a subset of the well network was selected in association with or

paired with several of the new RI wells to assess horizontal and vertical contaminant distribution Table 1

indicates that Well LL1mw-086 screened in the second (deep) ground water zone in the unconsolidated

glacial till is paired with ldquosentinelrdquo well LL1mw-088 screened in the first ground water zone in the

unconsolidated glacial till LL1mw-088 is a ldquonewrdquo well that was installed in December 2013 LL1mw-

086 is located downgradient of Load Line 1 and LL1mw-088 is located downgradient of LL1mw-086

and outside the perimeter fence Considering these wellsrsquo relationship to each other it is unclear how this

well pair is being used to determine horizontal and vertical extent This needs to be explained

Response Due to the thickness of the unconsolidated strata in this area of the former RVAAP (approx

75 feet) these two wells are being used as exit pathway wells to monitor dissolved constituents in the

upper and lower portions of the unconsolidated material As mentioned previously the groundwater

elevations for the two wells are nearly equal (difference of 002 feet) indicating that the two water-bearing

zones within the unconsolidated strata are in hydraulic communication in this area of the Site

Ohio EPA Comment 4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates

that some of the 42 selected wells for monitoring are to provide upgradient data for the various site-wide

models Information in Table 1 indicates that all 42 of the wells selected for monitoring are located

downgradient of an area of concern (AOC) impacted by constituents of concern (COCs) and would not

be appropriate for representing background water quality at the facility It needs to be clarified which of

the 42 wells are to be used to provide upgradient data for the various site models as well as the rationale

that was used to select these wells

Response The second paragraph on page 2 of the 2015 SAGWMA discusses the rationale for the initial

2012-2013 Semiannual Addendum under the RI not the proposed 42 wells for 2015 Specifically the

statement ldquoprovide up-gradient data for the various site-wide modelsrdquo was one of several listed

justifications for the monitoring well network presented in the 2012-2013 Semiannual Groundwater

Monitoring Addendum (EQM January 2012)

2

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 34: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Subject Facility-Wide Groundwater Monitoring Program RVAAP-66 Facility-Wide Groundwater Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 PortageTrumbull Counties

During a meeting with the Ohio EPA in September 2013 the Ohio EPA indicated that the current

network of background (BKG) wells was insufficient for determining background conditions at the

former RVAAP The Army subsequently proposed a subset of wells for inclusion in the background

network which the Ohio EPA appears willing to entertain however the Ohio EPA indicated in their

comment letter dated January 16 2014 that the number of proposed background wells may not be

sufficient The ARNG is in the process of preparing and submitting a Request for Proposal to eligible

contractors to continue the RIFS work at the former RVAAP including installation of additional wells

for establishing background conditions Consequently the Semiannual Groundwater Addendum for 2015

is designed to monitor potential offsite migration and potential fluctuations in contaminant concentrations

at selected source area wells No specific upgradient wells were selected for monitoring at this time since

the existing background data is not considered relevant The data generated from the proposed

semiannual monitoring wells for 2015 are still useful for any fate-and-transport modeling that may be

prepared as part of the future RI work

Ohio EPA Comment 5 Wells with Consistently Anomalous pH Values Need to be Monitored

Wells with consistently anomalous pH values outside the typical range of natural ground water (ie 5 to

9) need to be added to the list of wells to be sampled semiannually Wells that appear to have

consistently had anomalous pH values include FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-

013 These wells need to have pH and other field parameters outlined in the FWGWMP Ground Water

Monitoring Program Plan measured as part of semiannual sampling

Response Wells FWGmw-002 RQLmw-011 RQLmw-012 and RQLmw-013 will be monitored for pH

and the other stabilization criteria during the 2015 semiannual sampling events Time-series graphs for

pH will be prepared for each well and included in future annual and semiannual groundwater reports

Ohio EPA Comment 6 How Installation and Sampling of Three Proposed Wells Will Be

Incorporated into the 2015 Sampling Schedule Considering the concentrations of arsenic (LL1mw-

088 and LL2mw-271) thallium (LL2mw-271) cobalt (LL2mw-271) and manganese (LL3mw-246)

exceeding their respective (primary or secondary) MCLs andor RSLs and the low concentrations of

perchlorates and explosivespropellants present in one of the ldquonewrdquo monitoring wells (LL3mw-246)

Ohio EPA agrees in principle with the National Guardrsquos proposal at the May 21 2014 RAB Meeting to

install three additional monitoring wells near the southeast corner of the facility near Load Lines 1

through 3 The details of such a proposal including the location and construction of planned wells

would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on

its review of the January 2014 ground water sampling data from the facility and in an October 6 2014

letter to the National Guard Directorate To date no such proposal to install additional monitoring wells

has been submitted to the Agency It is not clear how the installation of these new wells will fit into the

2015 sampling schedule This needs to be explained

Response As mentioned in our response to Comment 4 the ARNG is in the process of preparing and

submitting a Request for Proposal to eligible contractors to continue the RIFS work at the former

RVAAP Following selection of a Contractor to complete the RI efforts a RIFS Work Plan will be

prepared with details regarding the location and construction of any additional RI wells at the former

RVAAP Any new wells will be sampled quarterly for the complete list of parameters under the

FWGWMP A schedule for completing this work will be provided as part of the RIFS Work Plan

Ohio EPA Comment 7 ldquoNewrdquo Wells Not Tested for Perchlorates It is not clear why the three ldquonewrdquo

wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low

levels of this compound were detected in samples from two of the ldquonewrdquo wells (LL2mw-271 and

3

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 35: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Subject Facility-Wide Groundwater Monitoring Program RVMP--66 Facility-Wide Groundwater

Response to Comments for the Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring

Addendum for 2015 PortageTrumbull Counties

LL3mw-246) collected during the January 2014 sampling evenL Ohio EPA made a similar comment in

an October 6 2014 letter to the NatiOIUll Guard Directorate This issue needs to be explained

Response Historically each well at RV AAP bas only been sampled once for perchlorates There have

been 195 wells that have had perchlorate detections above the reporting limit ranging from 00089 J JtgL

to 019 JLgfL (note that the RSL is 14 pgiL and the Interim Drinking Water Health Advisory is 15 ftgL)

Given the locations of the detections in LL2mw-271 and LL3MW-246 (ie outside the perimeter fence)

the Army will include perchlorntes in the semiannual sampling for these two wells in 2015

Finalization of this document will occur in accordance with the Directors Final Findings and

Orders upon receipt of the Ohio Environmental Protection Agency approval letter

Please contad the undersigned at (703) 607-7955 or marksleepercivmailmil if there

are issues or concerns with this submission

~Mark Leeper

RV AAP Restoration Program Manager

Army National Guard Directorate

cc Nancy Zikmanis Ohio EPA NEDO-DERR

Rod Beals Ohio EPA NEDO-DERR

Justin Burke Ohio EPA CO-DERR

Kevin Sedlak ARNG Camp Ravenna

Katie Tart OHARNG Camp Ravenna

Greg Moore USACE Louisville

Nat Peters USACE Louisville

Gail Harris Vista Sciences

4

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 36: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Table 1 RVAAP Monitoring Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen

(ft BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height

(ft AGS)

Facility-Wide

Background

BKGmw-004 236885297 56946476 96263 500 96516 A Unconsolidated NA 92 192 195 245

BKGmw-005 234083586 56228845 114694 190 114944 A Unconsolidated NA 82 182 185 250

BKGmw-006 235864396 57191047 102387 351 102638 A Bedrock 35 247 347 351 250

BKGmw-008 237274108 56965423 96814 250 97040 A Bedrock 100 147 247 250 250

BKGmw-010 237137295 56554076 100389 220 100629 A Bedrock 40 89 189 192 250

BKGmw-012 236779523 56391886 99522 598 99757 A Bedrock 80 396 596 598 250

BKGmw-013 226162739 55826916 98438 255 98659 A Unconsolidated NA 152 252 255 250

BKGmw-015 236148200 56933987 103571 550 103790 A Bedrock 105 301 501 504 250

BKGmw-016 234240708 55398350 109610 190 109842 A Unconsolidated NA 84 185 186 250

BKGmw-017 234611535 56245200 113069 348 113280 A Unconsolidated NA 232 333 336 250

BKGmw-018 235499391 57087335 104082 250 104306 A Bedrock 30 145 245 247 250

BKGmw-019 234988214 55986455 110585 340 110824 A Unconsolidated NA 230 330 332 250

BKGmw-020 235785600 55875624 106268 307 106500 A Bedrock 100 205 305 307 250

BKGmw-021 236762295 57101675 96971 190 97216 A Unconsolidated NA 77 178 181 250

Load Line 1

LL1mw-063 237684136 56365053 99220 274 99484 A Bedrock 31 171 271 274 264

LL1mw-064 238028697 56311874 93232 184 93510 A Unconsolidated NA 80 180 184 278

LL1mw-065 238045200 56091692 94153 205 94441 A Unconsolidated NA 102 202 205 288

LL1mw-067 237654530 56520114 97755 234 98036 A Bedrock 57 128 225 228 281

LL1mw-078 237627585 56462387 99340 400 99584 A Bedrock 10 287 382 387 244

LL1mw-079 237622831 56373963 99530 404 99787 A Bedrock 11 295 389 395 257

LL1mw-080 237684507 56247973 99370 245 99627 A Bedrock 00 95 190 195 257

LL1mw-081 237667266 56346273 99640 404 99892 A Bedrock 21 294 389 394 252

LL1mw-082 237697738 56295686 100370 395 100645 A Bedrock 18 289 385 390 275

LL1mw-083 237707480 56361275 99280 395 99520 A Bedrock 02 291 386 393 240

LL1mw-084 237731602 56316044 99640 372 99873 A Bedrock 20 267 363 370 233

LL1mw-085 237724694 56204625 99430 450 99684 A Bedrock 61 322 416 421 254

LL1mw-086 238043700 56171400 93800 772 94063 A Unconsolidated 772 645 745 747 263

LL1mw-087 237873200 56037500 94180 175 94432 A Unconsolidated NA 70 170 172 252

LL1mw-088 238052500 56174600 93630 240 93863 A Unconsolidated NA 139 239 242 233

Load Line 2

LL2mw-059 237545300 55802000 96433 229 96667 A Bedrock 77 93 191 195 234

LL2mw-060 237597800 55802200 95893 192 96157 A Bedrock 79 81 179 183 264

LL2mw-261 237331701 56189859 100897 205 101140 A Bedrock 07 98 198 200 243

LL2mw-262 237397146 56221947 101062 212 101262 A Bedrock 52 106 206 208 200

LL2mw-263 237429029 56159092 100897 222 101147 A Bedrock 60 108 208 210 250

LL2mw-264 237453276 56117363 100951 205 101188 A Bedrock 62 98 198 200 237

LL2mw-265 237559347 55797208 95874 225 96124 A Bedrock 80 118 218 220 250

LL2mw-266 237374461 56198268 101367 205 101628 A Bedrock 60 98 198 200 261

LL2mw-267 237371417 56139373 101236 205 101481 A Bedrock 98 98 198 200 245

LL2mw-268 237415640 56083144 101453 288 101728 A Bedrock 123 173 273 275 275

LL2mw-269 237475674 55948390 100891 280 101162 A Bedrock 186 171 271 273 271

LL2mw-270 237285894 56265618 100772 205 101018 A Bedrock 77 98 198 200 246

LL2mw-271 237571400 55782700 95870 250 96119 A Bedrock 110 146 246 249 249

Load Line 3 LL3mw-232 236986332 56136512 99859 378 100041 A Bedrock 220 268 368 370 223

LL3mw-233 236993358 56075064 100247 318 100436 A Bedrock 80 201 301 303 250

LL3mw-234 237029654 56005947 100447 205 100656 A Bedrock 35 98 198 200 266

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 37: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 3

LL3mw-235 237064238 55981155 100805 212 100994 A Bedrock 40 101 201 203 260

LL3mw-236 237117861 55986734 100894 250 101170 A Bedrock 58 138 238 240 260

LL3mw-237 237147481 55932711 100357 239 100557 A Bedrock 50 127 227 229 258

LL3mw-238 237062455 55956939 100475 207 100691 A Bedrock 15 105 205 207 270

LL3mw-239 237089417 55910184 100170 357 100350 A Bedrock 65 249 349 350 253

LL3mw-240 237130854 55820442 100560 355 100752 A Bedrock 155 244 344 346 250

LL3mw-241 237033294 55929900 99241 238 99465 A Bedrock 15 127 227 229 272

LL3mw-242 237199344 55703528 99739 205 99923 A Bedrock 31 98 198 200 264

LL3mw-243 237153206 55668850 98936 245 99116 A Bedrock 81 138 238 240 235

LL3mw-244 237145600 55603300 98620 450 98878 A Bedrock 177 345 445 447 258

LL3mw-245 236924900 55857300 97870 470 98124 A Bedrock 245 365 465 467 254

LL3mw-246 237144100 55596900 98650 430 98884 A Bedrock 140 328 428 430 234

Load Line 4

LL4mw-193 236423652 55496027 98042 219 98292 A Unconsolidated NA 113 213 215 250

LL4mw-194 236458486 55508922 98139 220 98376 A Unconsolidated NA 113 213 215 237

LL4mw-195 236519886 55504675 98002 210 98259 A Unconsolidated NA 103 203 205 257

LL4mw-196 236529710 55521352 98208 200 98455 A Unconsolidated NA 92 192 194 247

LL4mw-197 236538491 55539705 98316 217 98546 A Unconsolidated NA 108 208 210 230

LL4mw-198 236499119 55544204 98117 220 98342 A Unconsolidated NA 103 203 205 225

LL4mw-199 236542078 55462103 97473 220 97728 A Unconsolidated NA 103 203 205 255

LL4mw-200 236590305 55458015 98533 235 98793 A Unconsolidated NA 126 226 230 260

LL4mw-201 236541700 55460700 97590 670 97802 A Bedrock 420 565 665 667 212

Load Line 5

LL5mw-001 235462507 55431925 112500 260 112792 A Unconsolidated 204 140 240 240 292

LL5mw-002 235457152 55460401 112580 250 112868 A Unconsolidated 246 150 250 250 288

LL5mw-003 235496447 55453541 112470 210 112770 A Unconsolidated NA 110 210 210 300

LL5mw-004 235500644 55407373 112290 224 112581 A Unconsolidated 218 120 220 220 291

LL5mw-005 235442202 55415273 112650 278 112942 A Unconsolidated 260 170 270 270 292

LL5mw-006 235473078 55398482 112510 245 112800 A Unconsolidated 220 140 240 240 290

Load Line 6

LL6mw-001 235315323 55421484 112446 180 112416 F Unconsolidated NA 70 170 170 -030

LL6mw-002 235382009 55358988 112558 230 112936 A Unconsolidated NA 125 225 225 378

LL6mw-003 235304868 55354434 112203 234 112538 A Unconsolidated 200 125 225 225 335

LL6mw-004 235336879 55343182 112281 230 112539 A Unconsolidated 180 125 225 225 258

LL6mw-005 235319452 55317076 111751 199 112047 A Unconsolidated 129 95 195 195 296

LL6mw-006 235241915 55316528 112467 200 112437 F Unconsolidated NA 70 170 170 -030

LL6mw-007 235335489 55267717 111592 200 111562 F Unconsolidated 182 95 195 195 -030

LL6mw-008 235361600 55315400 112130 178 112415 A Unconsolidated 175 72 172 174 285

LL6mw-009 235360400 55314900 112140 395 112375 A Bedrock 175 290 390 392 235

Load Line 7

LL7mw-001 235219291 55492577 112690 300 112964 A Bedrock 144 195 295 295 274

LL7mw-002 235191823 55512655 112670 265 112955 A Bedrock 16 150 250 250 285

LL7mw-003 235235104 55541704 111823 315 112084 A Bedrock 169 210 310 310 261

LL7mw-004 235203520 55558114 112330 295 112632 A Bedrock 95 195 295 295 302

LL7mw-005 235174147 55558180 113330 282 113587 A Bedrock 20 180 280 280 257

LL7mw-006 235187992 55599059 112070 280 112356 A Bedrock 100 175 275 275 286

Load Line 8 LL8mw-001 235166610 55260706 111869 240 112146 A Unconsolidated NA 140 240 240 277

LL8mw-002 235101033 55240818 112167 304 112451 A Unconsolidated NA 200 300 300 284

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 38: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 8

LL8mw-003 235135925 55223114 111630 210 111905 A Unconsolidated NA 105 205 205 275

LL8mw-004 235126183 55180758 111273 205 111575 A Unconsolidated NA 100 200 200 302

LL8mw-005 235174832 55152248 111251 240 111573 A Unconsolidated 235 140 240 240 322

LL8mw-006 235148358 55129677 111433 242 111715 A Unconsolidated 182 140 240 240 282

Load Line 9

LL9mw-001 235581704 55612581 113184 216 113462 A Bedrock 155 105 205 205 278

LL9mw-002 235590776 55675511 112488 210 112730 A Bedrock 05 100 200 200 242

LL9mw-003 235663521 55644531 113346 220 113576 A Bedrock 90 115 215 215 230

LL9mw-004 235733876 55600200 112892 330 113183 A Bedrock 27 220 320 320 291

LL9mw-005 235650595 55706336 112763 206 113093 A Bedrock 20 100 200 200 330

LL9mw-006 235744667 55643479 112698 268 112988 A Bedrock 32 160 260 260 290

LL9mw-007 235702434 55700056 112029 191 111999 F Bedrock 04 85 185 185 -030

Load Line 10

LL10mw-001 235527222 55581625 113000 280 113277 A Bedrock 150 170 270 270 277

LL10mw-002 235571051 55552336 112440 280 112713 A Bedrock 150 170 270 270 273

LL10mw-003 235538992 55549471 112740 264 113028 A Bedrock 125 160 260 260 288

LL10mw-004 235543820 55523659 111960 312 112239 A Bedrock 180 210 310 310 279

LL10mw-005 235594355 55538053 112290 270 112567 A Bedrock 138 165 265 265 277

LL10mw-006 235565480 55499525 112120 240 112383 A Unconsolidated 230 135 235 235 263

Load Line 11

LL11mw-1 235277882 55750499 109746 230 110016 A Unconsolidated NA 114 214 214 270

LL11mw-2 235335422 55831052 108029 200 108000 F Unconsolidated NA 63 163 163 -029

LL11mw-3 235273722 55799967 108875 170 108849 F Unconsolidated NA 59 159 159 -030

LL11mw-4 235273729 55816429 108485 170 108473 F Unconsolidated NA 61 161 161 -012

LL11mw-5 235284762 55850121 107961 170 107941 F Unconsolidated NA 62 162 162 -020

LL11mw-6 235252137 55826354 108661 170 108650 F Unconsolidated NA 56 156 156 -011

LL11mw-7 235209487 55818994 107922 230 108200 A Unconsolidated NA 124 224 224 278

LL11mw-8 235238857 55798120 108790 170 108774 F Unconsolidated NA 56 156 156 -016

LL11mw-9 235257722 55790121 108838 170 108828 F Unconsolidated NA 67 167 167 -010

LL11mw-10 235203891 55767559 108023 220 108268 A Unconsolidated NA 109 209 209 245

LL11mw-011 235111900 55868000 107740 185 108020 A Unconsolidated NA 78 178 180 280

LL11mw-012 235112500 55869100 107790 1150 108036 A Bedrock 880 1045 1145 1147 246

Load Line 12

LL12mw-088 236866710 55639361 97894 290 98106 A Unconsolidated NA 148 248 250 212

LL12mw-107 236859504 55675874 97803 330 98019 A Unconsolidated NA 207 307 310 216

LL12mw-113 236822440 55834563 97767 230 98018 A Unconsolidated 220 123 223 225 251

LL12mw-128 236829251 55737132 97621 330 97824 A Unconsolidated NA 211 311 313 203

LL12mw-153 236813858 55782369 97534 260 97785 A Unconsolidated NA 123 223 225 251

LL12mw-154 236818418 55775399 97700 290 97906 A Unconsolidated NA 164 264 266 206

LL12mw-182 236885304 55589103 98220 361 98442 A Unconsolidated 340 252 352 355 222

LL12mw-182ss 236886700 55589700 98230 380 98502 A Unconsolidated 380 253 353 355 272

LL12mw-183 236922500 55606767 98059 360 98304 A Unconsolidated 340 233 333 336 245

LL12mw-184 236899816 55639995 98096 295 98316 A Unconsolidated NA 188 288 290 220

LL12mw-185 236883045 55694717 97909 240 98131 A Unconsolidated NA 108 208 210 222

LL12mw-186 236791163 55906562 97634 230 97831 A Unconsolidated 220 88 188 190 197

LL12mw-187 236852472 55763356 97790 290 97994 A Unconsolidated NA 172 272 274 204

LL12mw-188 236790905 55813181 97846 205 98063 A Unconsolidated NA 98 198 200 217

LL12mw-189 236794667 55856923 97617 185 97804 A Unconsolidated 155 75 175 177 187

LL12mw-242 236854529 55802051 97840 263 98120 A Unconsolidated NA 155 255 255 280

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 39: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Load Line 12

LL12mw-243 236819004 55737632 97810 240 98079 A Unconsolidated NA 130 230 230 269

LL12mw-244 236875142 55737717 97810 300 98065 A Unconsolidated NA 195 295 295 255

LL12mw-245 236837074 55704455 97750 290 98004 A Unconsolidated NA 180 280 280 254

LL12mw-246 236943217 55665889 98200 320 98483 A Unconsolidated 320 215 315 315 283

LL12mw-247 236893200 55514100 98130 205 98425 A Unconsolidated 183 100 200 202 295

Atlas Scrap Yard

ASYmw-001 236626085 55840404 97840 220 98113 A Unconsolidated 160 110 210 210 273

ASYmw-002 236617086 55788786 98200 200 98524 A Unconsolidated 180 95 195 195 324

ASYmw-003 236665149 55801594 97970 215 98221 A Unconsolidated 200 110 210 210 251

ASYmw-004 236716604 55764081 97710 278 97966 A Unconsolidated 275 170 270 270 256

ASYmw-005 236744816 55778301 97760 290 97980 A Unconsolidated 260 140 240 240 220

ASYmw-006 236674673 55725772 98020 270 98301 A Unconsolidated 270 160 260 260 281

ASYmw-007 236683449 55681808 98140 300 98416 A Unconsolidated 300 160 260 260 276

ASYmw-008 236747507 55708766 97620 280 97885 A Unconsolidated NA 150 250 250 265

ASYmw-009 236663194 55760368 97990 220 98270 A Unconsolidated 220 115 215 215 280

ASYmw-010 236698537 55727061 97820 280 98105 A Unconsolidated 280 170 270 270 285

Building 1200

B12mw-010 237129281 56582743 100272 210 100592 A Bedrock 30 100 200 200 320

B12mw-011 237141615 56568782 100376 247 100670 A Bedrock 20 140 240 240 294

B12mw-012 237143041 56582801 100343 223 100632 A Bedrock 25 120 220 220 289

B12mw-013 237122100 56590400 100180 220 100448 A Bedrock 12 115 215 217 268

C-Block Quarry

CBLmw-001 234365708 55940312 117850 500 118108 A Bedrock 19 390 490 490 258

CBLmw-002 234384522 55904448 117250 453 117524 A Bedrock 60 345 445 445 274

CBLmw-003 234397000 55969552 117222 440 117506 A Bedrock 25 330 430 430 284

CBLmw-004 234368876 55995158 117208 450 117484 A Bedrock 50 340 440 440 276

CBLmw-005 234457200 55868600 115560 310 115810 A Bedrock 90 220 300 302 250

Central Burn Pits

CBPmw-1 236709537 56161601 97271 323 97584 A Unconsolidated NA 218 318 318 313

CBPmw-2 236729566 56186583 96733 300 97004 A Unconsolidated NA 195 295 295 271

CBPmw-3 236676868 56194414 97204 250 97467 A Unconsolidated NA 145 245 245 263

CBPmw-4 236697880 56212380 96858 275 97113 A Unconsolidated NA 170 270 270 255

CBPmw-5 236691966 56231188 96883 280 97159 A Unconsolidated NA 145 245 245 276

CBPmw-6 236724368 56231187 96501 230 96764 A Unconsolidated 230 125 225 225 263

CBPmw-7 236651262 56200641 97347 300 97637 A Unconsolidated NA 195 295 295 290

CBPmw-8 236675721 56266884 97057 255 97319 A Unconsolidated NA 150 250 250 262

CBPmw-9 236717400 56179700 96990 650 97248 A Bedrock 440 540 640 642 258

Cobbs Pond

CPmw-1 236894881 56044091 97546 160 97526 F Unconsolidated NA 55 155 155 -020

CPmw-2 236823923 56031126 97272 160 97231 F Unconsolidated NA 55 155 155 -041

CPmw-3 236879649 56067630 97327 185 97292 F Unconsolidated NA 80 180 180 -035

CPmw-4 236867431 56184346 97851 200 98120 A Unconsolidated NA 95 195 195 269

CPmw-5 236790041 56184678 97071 400 97358 A Unconsolidated NA 295 395 395 287

CPmw-6 236772713 56283013 96297 185 96513 A Unconsolidated 180 80 180 180 216

Demo Area 2 DET-1B 235495947 56082003 106335 390 106585 A Unconsolidated NA 260 360 390 250

DET-2 235536033 56066471 106024 390 106124 A Unconsolidated 290 340 390 390 100

DET-3 235520494 56045610 103581 150 103681 A Unconsolidated 120 70 120 120 100

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 40: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Demo Area 2

DET-4 235507236 56045422 103768 110 103868 A Unconsolidated 110 60 110 110 100

DA2mw-104 235477379 56112959 107082 270 107389 A Unconsolidated NA 163 263 265 307

DA2mw-105 235455762 56057258 104266 140 104534 A Unconsolidated NA 83 133 135 268

DA2mw-106 235484884 56056049 104119 160 104379 A Unconsolidated 106 83 153 155 260

DA2mw-107 235492429 56048004 103918 150 104163 A Unconsolidated 120 88 138 140 245

DA2mw-108 235560443 56018177 102992 150 103236 A Bedrock 35 93 143 145 244

DA2mw-109 235479314 55989789 106866 240 107129 A Unconsolidated NA 113 213 215 263

DA2mw-110 235519591 55992702 106139 200 106378 A Unconsolidated NA 93 193 195 239

DA2mw-111 235472833 56022294 103963 160 104212 A Bedrock 80 71 121 123 249

DA2mw-112 235501898 56037835 103487 150 103744 A Unconsolidated 110 88 138 140 257

DA2mw-113 235515313 56039481 103451 140 103711 A Unconsolidated 126 83 133 135 260

DA2mw-114 235578500 56010900 102950 195 103190 A Bedrock 35 92 192 194 240

DA2mw-115 235526900 56045900 103540 440 103808 A Bedrock 143 338 438 440 268

Erie Burning Grounds

EBGmw-123 238004921 57174704 94559 320 94782 A Unconsolidated NA 210 310 315 223

EBGmw-124 238003024 57161807 93902 320 94139 A Unconsolidated NA 200 300 305 237

EBGmw-125 237967920 57165563 94755 250 94989 A Unconsolidated NA 140 240 245 234

EBGmw-126 238030731 57234881 93820 280 94061 A Unconsolidated NA 152 252 255 241

EBGmw-127 238017216 57108361 94021 300 94307 A Unconsolidated NA 190 290 295 286

EBGmw-128 237989279 57097032 94247 280 94247 A Unconsolidated NA 150 250 253 266

EBGmw-129 237924052 57203568 94197 290 94436 A Unconsolidated NA 160 260 260 239

EBGmw-130 237922069 57069561 94118 260 94400 A Unconsolidated NA 152 252 255 282

EBGmw-131 237966600 57165500 94750 710 95008 A Bedrock 501 605 705 707 258

Facility-Wide

FWGmw-001 236832100 56573900 95360 175 95662 A Unconsolidated 160 70 170 172 302

FWGmw-002 236760600 57101500 97060 710 97310 A Unconsolidated 710 570 670 672 250

FWGmw-003 234404200 56311800 112940 190 113196 A Unconsolidated NA 85 185 187 256

FWGmw-004 235697000 54931900 103450 200 103715 A Unconsolidated 160 95 195 197 265

FWGmw-005 233897300 55851000 116750 295 117010 A Bedrock 170 193 293 295 260

FWGmw-006 233542100 55314200 118190 180 118433 A Unconsolidated NA 75 175 177 243

FWGmw-007 234478500 54835600 107280 300 107541 A Unconsolidated NA 195 295 297 261

FWGmw-008 234156900 55573500 110900 210 111161 A Unconsolidated NA 100 200 202 261

FWGmw-009 234199800 55678400 109950 185 110214 A Unconsolidated NA 80 180 182 264

FWGmw-010 237906000 56507700 95950 173 96215 A Unconsolidated NA 60 160 162 265

FWGmw-011 238039000 56680100 93900 175 94161 A Unconsolidated 175 60 160 162 261

FWGmw-012 238038900 56679000 93890 400 94139 A Bedrock 175 295 395 397 249

FWGmw-013 235746000 55948300 105710 345 105951 A Bedrock 110 240 340 342 241

FWGmw-014 234106400 56095700 113500 185 113757 A Unconsolidated NA 83 183 185 257

FWGmw-015 235835300 55017900 101210 260 101451 A Unconsolidated NA 135 235 237 241

FWGmw-016 235836400 55017100 101190 650 101439 A Bedrock 368 545 645 647 249

Fuze and Booster

Quarry

FBQmw-166 234958483 55312342 110487 160 110886 A Unconsolidated NA 55 155 155 399

FBQmw-167 234967457 55355409 111205 220 111590 A Unconsolidated NA 50 150 150 385

FBQmw-168 235006861 55362036 113127 195 113391 A Unconsolidated 170 90 190 195 264

FBQmw-169 234973090 55368121 111736 160 112058 A Unconsolidated 150 50 150 150 322

FBQmw-170 235010241 55397540 113967 305 114226 A Bedrock 80 200 300 305 259

FBQmw-171 235007244 55423093 114049 300 114355 A Bedrock 95 180 280 280 306

FBQmw-172 234990737 55432217 114571 330 115009 A Bedrock 180 200 300 300 438

FBQmw-173 235044901 55449135 116243 500 116594 A Bedrock 30 295 495 500 351

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 41: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Fuze and Booster

Quarry

FBQmw-174 235028981 55414244 113578 225 113997 A Bedrock 10 120 220 225 419

FBQmw-175 235029798 55398924 113716 225 114073 A Bedrock 40 120 220 225 357

FBQmw-176 235021945 55327333 112957 215 113191 A Unconsolidated 170 110 210 210 234

FBQmw-177 235011218 55332194 112573 225 112857 A Unconsolidated 180 120 220 220 284

Landfill North of

Winklepeck

LNWmw-024 235840321 56482589 103530 240 103800 A Unconsolidated 185 100 200 200 270

LNWmw-025 235841706 56507192 102720 190 102913 A Unconsolidated 120 80 180 180 193

LNWmw-026 235895224 56465816 102500 240 102780 A Unconsolidated NA 130 230 230 280

LNWmw-027 235862875 56451741 102440 250 102713 A Bedrock 100 140 240 240 273

NACA Test Area

NTAmw-107 234543340 55169729 107765 240 108030 A Unconsolidated NA 120 220 220 265

NTAmw-108 234578160 55191622 108322 230 108562 A Unconsolidated NA 120 220 220 240

NTAmw-109 234599772 55129325 107689 190 107984 A Unconsolidated NA 80 180 180 295

NTAmw-110 234643894 55135146 108003 300 108262 A Unconsolidated NA 170 270 270 259

NTAmw-111 234663801 55153860 107807 200 108094 A Unconsolidated NA 95 195 195 287

NTAmw-112 234688948 55171214 107536 239 107833 A Unconsolidated NA 139 239 239 297

NTAmw-113 234708283 55148852 107261 275 107568 A Unconsolidated NA 170 270 275 307

NTAmw-114 234730157 55159294 107561 200 107871 A Unconsolidated NA 95 195 195 310

NTAmw-115 234758116 55179178 108691 240 108965 A Unconsolidated NA 125 225 225 274

NTAmw-116 234819639 55174800 109168 220 109433 A Unconsolidated NA 100 200 200 265

NTAmw-117 234799483 55158457 109167 250 109454 A Unconsolidated NA 145 245 245 287

NTAmw-118 234760941 55133504 107886 225 108144 A Unconsolidated NA 120 220 220 258

NTAmw-119 234601300 55128600 107740 1300 108007 A Unconsolidated NA 900 1000 1002 267

Ramsdell Quarry

Landfill

RQLmw-006 237592771 56609126 99352 399 99539 A Bedrock 42 194 394 396 187

RQLmw-007 237587256 56654436 96386 187 96591 A Bedrock 00 60 160 162 205

RQLmw-008 237601108 56632795 96382 187 96608 A Bedrock 05 60 160 162 226

RQLmw-009 237625365 56635120 96260 165 96458 A Bedrock 00 59 159 164 198

RQLmw-010 237604858 56685739 98004 330 98214 A Bedrock 28 125 325 330 210

RQLmw-011 237639819 56681966 97460 329 97657 A Bedrock 25 124 324 326 197

RQLmw-012 237655819 56655195 97512 305 97765 A Bedrock 28 198 298 300 253

RQLmw-013 237620493 56692809 97804 344 98071 A Bedrock 06 237 337 339 267

RQLmw-014 237651938 56694129 97083 294 97349 A Bedrock 24 186 286 289 266

RQLmw-015 237549096 56656090 98919 401 99126 A Bedrock 04 292 392 395 207

RQLmw-016 237564955 56617768 99402 395 99660 A Bedrock 27 285 385 390 258

RQLmw-017 237612418 56593138 98869 305 99123 A Bedrock 20 198 298 300 254

Winklepeck Burning

Grounds

WBGmw-005 235716355 56303718 105220 190 105470 A Unconsolidated NA 83 183 186 250

WBGmw-006 235908779 56300887 101216 190 101466 A Unconsolidated NA 76 176 179 250

WBGmw-007 236042044 56247987 99809 240 100059 A Unconsolidated NA 135 235 238 250

WBGmw-008 235970057 56201035 100571 185 100821 A Unconsolidated NA 81 182 185 250

WBGmw-009 235715920 56160354 104503 240 104753 A Unconsolidated NA 114 214 215 250

WBGmw-010 235605196 56289320 106710 210 106985 A Unconsolidated NA 105 205 208 275

WBGmw-011 235618729 56260918 106970 220 107238 A Unconsolidated NA 110 210 213 268

WBGmw-012 235481065 56224090 107650 300 107911 A Unconsolidated NA 190 290 293 261

WBGmw-013 235522325 56151827 106910 220 107170 A Unconsolidated NA 110 210 213 260

WBGmw-014 236043922 56206126 99410 230 99678 A Unconsolidated NA 120 220 223 268

WBGmw-015 235918241 56234012 100910 220 101160 A Unconsolidated NA 110 210 213 250

WBGmw-016 236064588 56270913 99490 240 99703 A Unconsolidated NA 130 230 233 213

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 42: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

RVAAP Well Construction Details

RVAAP Area Well ID

Ohio State

Plane Easting

Ohio State

Plane

Northing GL Elevationa

Total Drilled

Depthb

TOC

Elevationa

Well

Head

Typec

Monitoring

Zone

Depth to

Bedrock ft

Top of

Screen (ft

BGS)

Bottom of

Screen (ft

BGS)

Bottom of

Inner

Casing

Plug or End

Cap (ft

BGS)

Stickup

height (ft

AGS)

Winklepeck Burning

Grounds

WBGmw-017 235960384 56291324 100400 220 100662 A Unconsolidated NA 110 210 213 262

WBGmw-018 236130200 56265900 99050 240 99145 A Unconsolidated NA 135 235 237 095

WBGmw-019 236130400 56264500 98930 500 99025 A Bedrock 300 396 496 498 095

WBGmw-020 235716100 56162300 104340 433 104431 A Bedrock 240 329 429 431 091

WBGmw-021 235910600 56300900 101000 425 101092 A Bedrock 241 320 420 422 092

Suspected Mustard

Agent Burial Site

MBS-001 234532300 55075950 107968 300 108220 A Unconsolidated NA 19 287 290 252

MBS-002 234532230 55088620 108050 300 108322 A Unconsolidated NA 18 273 280 272

MBS-003 234517240 55092280 108245 300 108445 A Unconsolidated NA 185 282 285 200

MBS-004 234513420 55076790 107955 260 108180 A Unconsolidated NA 147 244 247 225

MBS-005 234535410 55080070 108050 300 108242 A Unconsolidated NA 18 28 2808 192

MBS-006 234528230 55072610 108029 280 108183 A Unconsolidated NA 165 265 2656 154

Sharon Conglomerate

SCFmw-001 235317898 55476862 111853 2300 112071 A Bedrock 325 2010 2110 2110 218

SCFmw-002 236892736 55515238 98228 1530 98456 A Bedrock 240 1370 1470 1470 228

SCFmw-003 237584320 55795767 95614 1400 95847 A Bedrock 100 1255 1355 1355 233

SCFmw-004 237873023 56036103 94187 1200 94417 A Bedrock 500 1000 1100 1100 230

SCFmw-005 237701405 56730235 95843 1600 96080 A Bedrock 110 1390 1540 1540 237

SCFmw-006 236939454 56958341 96369 900 96592 A Bedrock 537 760 860 860 223

a elevations are in feet above mean sea level (amsl)

b total drilled well borehole depth relative to ground surface

c A = above grade completion F = flush-mount completion

NA = not available

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 43: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

Table 2 Comparison of Shallow and Deep Unconsolidated Well Pairs

July-12 January-13 August-13

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

1534

2400

992

95932

94910

93071

95691

90860

86850

-0179 1739

2314

735

95727

94996

93328

95691

90860

86850

-0119 1530

2329

707

95936

94981

93356

95691

90860

86850

-0165

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

NM

1253

1290

NM

106731

106717

91740

106389

98240 -0005

NA NM

1182

1275

NM

106802

106732

91740

106389

98240

NA

-0011

NM

1179

1230

NM

106805

106777

91740

106389

98240

NA

-0006

January-14 May-14 July-14

Elevation at Vertical Elevation at Vertical Elevation at Vertical

Monitored TOC Elev ft DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic DTW Potentiometric Midpoint of Well Hydraulic

Well Zone amsl ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

ft amsl Elevation ft Screen ft amsl Gradienta

BKGmw-021

FWGmw-002

LL1mw-086

Unconsolidated

Deep Unconsol

Deep Unconsol

97466

97310

94063

NMc

NMc

594

NMc

NMc

93469

95691

90860

86850

NA 1341

2266

596

96125

95044

93467

95691

90860

86850

-0191 NM

c

2366

845

NMc

94944

93218

95691

90860

86850

NA

LL1mw-088b

NTAmw-109

NTAmw-119

Unconsolidated

Unconsolidated

Deep Unconsol

93863

107984

108007

592

NMc

1183

93271

NMc

106824

91740

106389

98240 NA

0000 394

1041

1082

93469

106943

106925

91740

106389

98240

-0041

-0005

609

NMc

1200

93254

NMc

106807

91740

106389

98240

-0048

NA

a Vertical hydraulic gradient equals the difference in water levels divided by the vertical distance between the midpoint of the

well screens A positive vertical gradient indicates the potential for upward flow whereas a negative gradient equals

downward flow potential b

Well not installed until December 2013 c

Well not gauged or sampled as part of this semi-annual sampling event

NM = not measured

NA = not applicable

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 44: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

middot~

_

John R Kasich Governor Mary Taylor Lt Gove rno r Craig W Butler Di recto r

November 25 2014

Mr Brett Merkel Re US Army Ravenna Ammunition Pit RVAAP Army National Guard Directorate Assessment ARNGD-ILE Clean Up Remedial Response 111 South George Mason Drive Portage Arlington VA 22203 267000859

Subject Ravenna Army Ammunition Plant PortageTrumbull Counties Comment Letter Re FWGWMP Draft Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 Dated October 10 2014 Ohio EPA ID 267shy000859-036

Dear Mr Merkel

The Ohio Environmental Protection Agency (Ohio EPA) has received and reviewed the Draft Facility-Wide Groundwater Monitoring Program (FWGWMP) RVAAP-66 Facility-Wide Groundwater Semiannual Groundwater Monitoring Addendum for 2015 This document was received at Ohio EPAs Northeast District Office (NEDO) Division of Environmental Responseand Revitalization (DERR) on October 10 2014 and is dated October 10 2014 The document was prepared for the US Army Corps of Engineers (USACE)-Louisville District byEnvironmental Quality Management Inc (EQM) under contract no GS-1 OF-0293K

The report outlines the subset of 42 of the existing 284 FWGWMP monitoring wells at the former Ravenna Army Ammunition Plant (RVAAP) that will be sampled during semiannual sampling events scheduled for January and July 2015 According to the document the wells are being sampled to evaluate potential offsite migration potential source area contaminant attenuation and seasonaltemporal variation Further a subset of the well network was selected in association with or paired with several new wells to assess horizontal andorvertical contaminant distribution and to provide upgradient data for the various site-wide models

Comments on the document based on Ohio EPA review are provided below Please provide responses to the enclosed comments in accordance with the Directors Findings and Orders

COMMENTS

1 Inconsistency in the Naming of Ground Water Zones Table 1 inconsistently identifies wells screened in unconsolidated glacial material either as overburden wells or as unconsolidated wells This is unnecessarily confusing The identifying name of the hydrostratigraphic unit needs to be consistent and accurately identify the unit Ohio EPA discourages the use of the term overburden because it is ambiguous and not appropriate Overburden is a mining term that refers to material of any nature consolidated or unconsolidated that overlies a deposit of useful material (eg gravel ore and coal) that are mined from the surface by open cuts

Scanned Northeast District Office bull 2110 East Aurora Road bull Tw in sbu rg OH 44087-192 4 wwwe pao hio gov bull (3 30) 963-120 0 bull (330) 487-0769 (fax)By ~~~

Date l d ~ a- Jo 111

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 45: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR BRETT MERKELARMY NATIONAL GUARD DIRECTORATENOVEMBER 25 2014PAGE 2

2 Shallow and Deep Unconsolidated Ground Water Zones Table 1 indicates that 17of the wells to be monitored are screened in the first or uppermost water-bearingzone in the unconsolidated glacial material and two of the wells to be monitored arescreened in the second water bearing zone or deep portion of the unconsolidatedglacial material It is unclear if there are one or two hydrostratigraphic zones within theunconsolidated glacial material beneath the RVAAP In order to assure that the facilityis adequately monitored it needs to be clarified if the two ground water zones have thesame potentiometric surface and to what extent the two zones are interconnected

3 Horizontal Extent Evaluated with Well Pair LL1mw-086 and LL1mw-088 TheSAGWMA indicates (page 2) that a subset of the well network was selected inassociation with or paired with several of the new Rl wells to assess horizontal andvertical contaminant distribution Table 1 indicates that Well LL 1mw-086 screened inthe second (deep) ground water zone in the unconsolidated glacial till is paired withsentinel well LL 1mw-088 screened in the first ground water zone in the unconsolidatedglacial till LL1mw-088 is a new well that was installed in December 2013 LL 1mwshy086 is located downgradient of Load Line 1 and LL 1mw-088 is located downgradient ofLL 1mw-086 and outside the perimeter fence Considering these wells relationsh ip toeach other it is unclear how this well pair is being used to determine horizontal andvertical extent This needs to be explained

4 Wells Used for Upgradient Data The 2015 SAGWMA (page 2) indicates that some ofthe 42 selected wells fo r monitoring are to provide upgradient data fo r the various sideshywide models Information in Table 1 indicates that all 42 of the wells selected formonitoring are located downgradient of an area of concern (AOC) impacted byconstituents of concern (COCs) and would not be appropriate for representingbackground water quality at the facility It needs to be cla rified which of the 42 wells areto be used to provide upgradient data for various site models as well as the rationalethat was used to select these wells

5 Wells with Consistently Anomalous pH Values Need to be Monitored Wells withconsistently anomalous pH values outside the typical range of natural ground water(ie 5 to 9) need to be added to the list of wells to be sampled semiannually Wells thatappear to have consistently had anomalous pH values include FWGmw-002 RQLmwshy011 RQLmw-012 and RQLmw-013 These wells need to have pH and other f ield parameters outlined in the FWGWMP Ground Water Monitoring Program Planmeasured as part of semiannual sampling

6 How Installation and Sampling of Three New Proposed Wells Will Be Incorporatedinto the 2015 Sampling Schedule Considering the concentrations of arsenic(LL1mw-088 and LL2mw-271 ) thallium (LL2mw-271 ) cobalt (LL2mw-271 ) andmanganese (LL2mw-246) exceeding their respective (primary or secondary) MCLsandor RSLs and the low concentrations of perchlorates and explosivespropellantspresent in one of the new monitoring wells (LL3mw-246) Ohio EPA agrees inprinciple with the National Guards proposal at the May 21 2014 RAB Meeting toinstall three additional monitoring wells near the southeast corner of the facility near

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset
Page 46: FACILITY-WIDE GROUNDWATER MONITORING … · final . facility-wide groundwater monitoring program plan . rvaap-66 facility-wide groundwater . semiannual groundwater monitoring addendum

MR BRETT MERKEL ARMY NATIONAL GUARD DIRECTORATE NOVEMBER 25 2014 PAGE 3

Load Lines 1 through 3 The details of such a proposal including the location and construction of planned wells would have to be reviewed and approved by Ohio EPA Ohio EPA had made a similar comment based on its review of the January 2014 ground water sampl ing data from the facility and in an October 6 2014 letter to the National Guard Directorate To date no such proposal to install additional monitoring wells has been submitted to the Agency It is not clear how the installation of these new wells will fit into the 2015 sampling schedule This needs to be explained

7 New Wells Not Tested for Perchlorates It is not clear why the three new wells installed in December 2013 are not scheduled to be tested for perchlorates (refer to Table 2) Low levels of this compound were detected in samples from two of the new wells (LL2mw-middot271 and LL3MW-246) collected during -ihe January 201 4 sampling event Ohio EPA made a similar comment in an October 6 2014 letter to the National Guard Directorate This issue needs to be explained

Pursuant to the CERCLA process the property owner usually can provide the expected land uses to assist in ensuring that the investigation addresses all receptors for both current and future land uses Be advised that due to land use uncertainty Ohio EPA may require additional work in the future to address data gaps It is incumbent upon the Army to finalize land use at Camp Ravenna as soon as possible otherwise additional work and schedule slippage mayresult

This document was reviewed by personnel from Ohio EPA DERR Ohio EPA has determined that additional information is necessary to approve the document If you have any questions please call me at (330) 963-1292

Sincerely

~vV_ ~-pound Kevin M Palombo Environmental Specialist Division of Environmental Response and Revitalization

KPnvr

cc Katie Tait OHARNG RTLS Kevin Sedlak ARNG Gregory F Moore USACE Mark Nichter USACE Rebecca HaneyGail Harris Vista Sciences Corp

ec Nancy Zikmanis Ohio EPA NEDO DERR Justin Burke Ohio EPA CO DERR Rod Beals Ohio EPA NEDO DERR AI Muller Ohio EPA NEDO DDAGW

  • SEMIANNUAL GROUNDWATER MONITORING ADDENDUM FOR 2015
  • SF-298
  • March 9 2015 Ohio EPA Approval Letter
  • CONTRACTORrsquoS STATEMENT OF INDEPENDENT TECHNICAL REVIEW
  • Document Distribution for the Final FWGWMP Semiannual Groundwater Monitoring Addendum for 2015 Former Ravenna Army Ammunition Plant
  • TABLE OF CONTENTS
    • LIST OF TABLES
    • LIST OF FIGURES
      • EXECUTIVE SUMMARY
      • BACKGROUND
      • PURPOSE OF ADDENDUM
      • SCOPE OF WORK UNDER THE ADDENDUM
        • pH Monitored Wells
        • New Wells
        • RCRA Wells
        • Existing CERCLA Wells
          • SCHEDULE
          • TABLES
            • Table 1 Semiannual Monitoring Wells and Rationale
            • Table 2 Semiannual Analyte List
            • Table 3 Current Analytical Suite of Chemicals
              • FIGURES
              • APPENDIX A CORRESPONDENCE amp COMMENTRESPONSE
              • Untitled
              • Appendix A Adobe DCpdf
                • February 4 2015 Ohio EPA Letter
                • December 19 2014 NAtional Guard Bureau Letter
                • November 25 2014 Ohio EPA Letter
                      1. 1_REPORT_DATE_DDMMYYYY 20-02-2015
                      2. 2_REPORT_TYPE Final
                      3. 3_DATES_COVERED_From__To August 2014 through February 2015
                      4. 4_TITLE_AND_SUBTITLE Facility-Wide Groundwater Monitoring Program13RVAAP-66 Facility-Wide Groundwater 13Semiannual Groundwater Monitoring Addendum for 201513Ravenna Ohio
                      5. 5a_CONTRACT_NUMBER GS-10F-0293K
                      6. 5b_GRANT_NUMBER NA
                      7. 5c_PROGRAM_ELEMENT_NUMBER NA
                      8. 5d_PROJECT_NUMBER NA
                      9. 5e_TASK_NUMBER W912QR-11-F-0266
                      10. 5f_WORK_UNIT_NUMBER NA
                      11. 6_AUTHORS Miller John M - Environmental Quality Management Inc
                      12. 7_PERFORMING_ORGANIZATION Environmental Quality Management Inc131800 Carillon Boulevard13Cincinnati Ohio 45240
                      13. 8_PERFORMING_ORGANIZATION NA
                      14. 9_SPONSORINGMONITORING_AG US Army Corps of Engineers13600 Dr Martin Luther King Jr Place13Louisville KY 40202-2232
                      15. 10_SPONSORMONITORS_ACRONY USACE
                      16. 1_1_SPONSORMONITORS_REPOR
                      17. 12_DISTRIBUTIONAVAILABILI No Limitations
                      18. 13_SUPPLEMENTARY_NOTES None
                      19. 14ABSTRACT This document presents a summary of the changes to facility-wide groundwater monitoring and a supplement to the Facility-Wide Groundwater Monitoring Program Plan Included in the addendum are1313bull Background of the facility-wide groundwater monitoring13bull Purpose of the addendum13bull Scope of work under the addendum13bull Schedule13
                      20. 15_SUBJECT_TERMS Facility-wide RVAAP-66 groundwater wells monitoring RVAAP Semiannual Addendum 2015
                      21. a_REPORT None
                      22. bABSTRACT None
                      23. c_THIS_PAGE None
                      24. 17_limitation_of_abstract SAR
                      25. number_of_pages 46
                      26. 19a_NAME_OF_RESPONSIBLE_P John M Miller
                      27. 19b_TELEPHONE_NUMBER_Incl 513-825-7500
                      28. Reset