ct f january 1992 · 2011-05-14 · hazardous waste remedial actions program martin marietta energy...

72
RICKENBACKER AIR NATIONAL GUARD BASE COLUMBUS, OHIO ADDENDUM TO THE PRE-CLOSURE SAMPLING REPORT HAZARDOUS WASTE STORAGE AREA AD-A252 559 DTIC FINAL EL CT F JUNi 6 1992D JANUARY 1992 sC t I C3.u o~e I/ HARPSUPPORT CON 'f TR. OIF~icr. Oak Ridgc. Tennemec 37831! M A NAGED BY MARnlN MARIETTA E.NE-RGY SYSTEMS, INc. For the U.S. DE PAT'MENT" OF E;NIERGY under contract DE-AC05-840R21!400

Upload: phunganh

Post on 13-May-2019

216 views

Category:

Documents


0 download

TRANSCRIPT

RICKENBACKER AIR NATIONAL GUARD BASECOLUMBUS, OHIO

ADDENDUM TO THEPRE-CLOSURE SAMPLING REPORT

HAZARDOUS WASTE STORAGE AREA

AD-A252 559 DTICFINAL EL CT F

JUNi 6 1992DJANUARY 1992 sC t

I C3.u o~eI/

HARPSUPPORT CON 'f TR. OIF~icr.Oak Ridgc. Tennemec 37831!

M A NAGED BY MARnlN MARIETTA E.NE-RGY SYSTEMS, INc.For the U.S. DE PAT'MENT" OF E;NIERGY under contract DE-AC05-840R21!400

Report Document PagePlc reporting burden for this ildoiabon is estimated to average I hog per response, includng the time to review instructions, searcling esting data sources. gahwng andmaintaning the data needed, and compkiting and reviewing th coflecton of irdonlaton Send conerts regarding dis burden estimate ora y other aspect of this colection ofirtorrnion, including suggestions for reducing ths burden to Wastungton Senece Headquarters Servces Directorate for Intormatmon Operaions ad Reports. 1215 Jefferson CoosHi*Cwiev. Suit 1204. Arknoton. VA 22202-4302and toteOffice of Mnaenentand Budot. Paoework Reduction Proiect 0704&0188)Waslinaton. DC 205031. Agency Use Only (Leave Blwak) 2. Report Date 3. Report Type and Dates Covered

IJanuary 1992 Final Sampling Report4. Tide and Subttle 5. Funing Numbers

Rickenbacker Air National Guard Base, Columbus, OHAddendum to the Pre-closure Sampling ReportHazardous Waste Storage Area

6. Author(s)

N/A

7. Performng Orgaization Nane(s) and Address(es) 8. Perfoning Organization Reportnumber

Engineering - Science19101 Villaview Road - Suite 301Cleviand, Ohio 44119

9. Sponso1ngIMoN*orig Agency Name(s) and Address(es) 10. Sool Monkodng Agency

Hazardous Waste Remedial Action Program Report NumberOak Ridge TN

Air National Guard Readiness CenterAndrews Air Force Base, Maryland 20331

Ii. Supplemental Notes

12. Distribution/Availabllty Statement 12b. Distribution Code

Approved for public release; distribution is unlimited

13. Abstract (maxinum 200 words)

Additional investigations were required at the Hazardous Waste Storage Area at theRickenbacker Air National Guard Base. The purpose of the investigation was to determine thelateral and vertical extent of soil and ground water contamination contamination at the site.Additionally sufficient information was obtained in order to complete the addendum closure plan.The Hazardous Waste Storage Area will be closed in accordance with the Ohio EnvironmentalProtection Agency regulations once the final addendum closure plan is approved.

14. Subject Terms Hazardous Waste Storage Area, Rickenbacker Air National Guard 15. Nunber of PagesBase, Ohio Envirormental Protection Agency 67

16. Price Cod

17. Securlty Classification of IS. Security Classification of 19. Securty Classilcation of 20. UImtaton od AbstractReport this Page Abstract

Unclassified Unclassified Unclassified NoneNSN 740- -9G-56oM Stndrd Form 299 (Rev 2-90) Prescrbed by ANSI StdM 23M 0 299-0

I

ADDENDUM TO THEPRE-CLOSURE SAMPLING REPORT

RICKENBACKER AIR NATIONAL GUARD BASECOLUMBUS, OHIO

FINAL AceFsa± Yor

Jlw-, t i f Ir eat i et ,i- A L

JANUARY 1992 -

Avai lability Codesciand/or

Dist special

Submitted To:

NATIONAL GUARD BUREAUNGB/DEVR

ANDREWS AFB, MARYLAND

Submitted By:

HAZARDOUS WASTE REMEDIAL ACTIONS PROGRAMMARTIN MARIETTA ENERGY SYSTEMS, INC.

OAK RIDGE, TENNESSEE

--_ Prepared By:

ENGINEERING-SCIENCE19101 Villaview Road, Suite 301

Cleveland, Ohio 44119

* For the:

U.S. DEPARTMENT OF ENERGYUNDER CONTRACT NO. DE-AC05-8401U1400

92 6 12 0,3

0592EPCI94.30#WS 4.-

TABLE OF CONTENTS

Acronyms ill

1.0 EXECUTIVE SUMMARY 1-1

2.0 PURPOSE AND SCOPE 2-1

I 3.0 BACKGROUND 3-1

4.0 FIELD INVESTIGATION PROGRAM 4-14.1 Groundwater Screening 4-14.2 Monitoring Well Installation 4-34.3 Surface Soil Sampling 4-44.4 Groundwater Sampling 4-4

5.0 FIELD INVESTIGATION FINDINGS 5-15.1 Groundwater Results 5-15.2 Soil Results 5-15.3 Hydrogeology 5-6

6.0 CONCLUSIONS AND RECOMMENDATIONS 6-1

7.0 REFERENCE S 7-1

U LIST OF TABLES

Number Tik

1 VOCs in Groundwater Samples 5-22 SVOCs in Soil Samples 5-33 Metals Above Background in Soil Samples 5-54 Groundwater Elevations 5-8

LIST OF FIGURES

Number Titil

I 1 Location Map 2-22 Site Location Map 2-33 VOCs in Shallow Groundwater 4-24 Total SVOCs in Surface Soils 5-45 Groundwater Elevation Map 5-7

LIE OF APENDICES

_ Appendix A Momitoring Well Los/Construction DiagramsAppendix B Analytical Data Validation NotesAppendix C Validated Analytical Data

*192EII4J#WS .1

I ACRONYMS

BL Berkeley Laboratory

CLP Contract Laboratory Protocol

EPA Environmental Protection Agency

I ES Engineering-Science, Inc.

I HC Hydrocarbon

HWSA Hazardous Waste Storage Area

IRP Installation Restoration Program

MS Matrix Spike

MSD Matrix Spike Duplicate

MW Monitoring Well

PSH Phase-Separated Hydrocarbon

I PSP Pre-Closure Sampling Plan

QC Quality Control

SI Site Investigation

SS Soil Sample

SVOC Semi Volatile Organic Compound

US United States

UST Underground Storage Tank

VOC Volatile Organic Compound

I WO Work Order

IIII *92EC194-36#WS 4-U-

SECTION 1.0EXECUTIVE SUMMARY

This report addendum documents the activities and findings of field investigations

conducted at the Hazardous Waste Storage Area (HWSA) at Rickenbacker Air

National Guard Base (the Base) during October of 1991. The purpose of this

investigation is to determine the extent of chemical contamination in the surface

sediment, soil and groundwater at the HWSA.

Previous investigations at this site are described in a report by Engineering-Science,

Inc. titled "Pre-Closure Sampling Report, Hazardous Waste Storage Area" (draft,

October 1990).

Rickenbacker ANGB is located twelve miles southeast of Columbus, Ohio. The

facility has been in operation since the early 1940s in support of training and air-to-airI refueling missions.

The HWSA at the Base consists of Building 560 and the Drum Storage Area

southeast of the building. It has been under a Part A Permit for hazardous wastestorage since 1983. The facility was last used in September 1986. The Drum Storage

Area adjacent to Building 560 had been used to store liquid wastes such as spent

solvents, cleaning fluids, acids and paint strippers. There are four 25,000-gallon steel

underground storage tanks (USTs) adjacent to the HWSA. One tank is situated within

the area defined by the perimeter fence. The USTs have been in use for approximately40 years. Two tanks currently store de-icing fluid. JP-4 jet fuel, and recyclable oil were

historically stored in the other two tanks.

Activities conducted during the pre-closure sampling included surface soil sampling,

shallow and deep soil sampling by boring, installation of groundwater monitoring wells

and groundwater sampling.

All work conducted at the HWSA was done in accordance to the Pre-Closure

Sampling Plan (December 1989, Addended September 1991) with site activities being

complete in the Spring of 1990 and in October 1991.

I1M 9PC1t436W$ 1-1

The surficial (<30' below grade) unconsolidated materials are similar throughout

the Base and the HWSA. The uppermost ten feet is typically a brown silty clay, with

trace amounts of small pebbles. From ten to approximately fifteen feet is silty/sandy

clay. A saturated sand is encountered at approximately 15 feet. Water from this sandrises in wells to eight to ten feet below grade. This is underlain by a thin (<1') layer of

hard, dense gray clay over brown to gray sand and gravel. The hydraulic gradient is in ageneral southerly direction.

The investigation conducted in 1990 determined that the surface and shallow soil

within and adjacent to the HWSA are contaminated with metals, semi-volatile organiccompounds (SVOCs) and volatile organic compounds (VOCs). The extent andconcentration of contaminants generally decrease with depth. The exception to thatgeneralization is the contamination of the shallow aquifer with phase-separatedhydrocarbons, dissolved fuel components and halogenated VOCs with only trace

concentrations in the shallow soil. In 1991, additional investigations were conducted todetermine the extent of contamination.

The investigation conducted in 1991 defined the extent of the contaminants at thissite. Groundwater screening, soil boring and sampling, monitoring well installation,surface soil sampling and groundwater sampling were conducted during October of 1991

that assisted in defining the contaminant plume. The downgradient extent of thegroundwater is defined by monitoring wells (MW) 11 and 12 which are approximately120 feet downgradient from the southeastern corner of the HWSA.

Groundwater samples obtained from existing wells at the site confirmed existence ofVOCs previously detected in samples taken from these wells. Phase-separatedhydrocarbon (PSH) was apparent in MW1 and MW5 during the 1991 investigation("Determination of Phase-Separated Hydrocarbon Extent at the Hazardous Waste

Storage Area", draft, October 1990, ES). Well MW5 had previously exhibited the

existence of PSH.

Recovery of PSH has been ongoing at MW5. Limited amounts have been recoveredtotalling less than 55 gallons. The extent of PSH in the groundwater was explored using

the groundwater screening tool. The total extent of PSH is limited to the areaimmediately surrounding MW1 and MW5. The source or origin of the hydrocarbon isunclear.

0192EPI.M#WS 1.2

These data as well as all other data obtained at the HWSA will be incorporated into

a Closure Plan for the proposed closure of this permitted storage area. This ClosurePlan will be reviewed by the Ohio Environmental Protection Agency. It is anticipatedthat groundwater cleanup will be undertaken during the closure of this site.

9192EPCIIJ#W 1.3

SECTION 2.0

PURPOSE AND SCOPE

This addendum documents the activities and findings of the field investigations

conducted in October 1991 at the former Hazardous Waste Storage Area (HWSA),

building 560, at Rickenbacker ANGB, Ohio (Figures 1 and 2). These investigationswere conducted in accordance with the Pre-Closure Sampling Plan (PSP) dated

December 1989 and the Addendum #1 to the PSP dated September 1991. The data

collected during this investigation will be appended to the existing database for this site.Reporting of data from the original investigation was completed in the "Pre-ClosureSampling Report, Hazardous Waste Storage Area", draft, October 1990 by Engineering-Science (ES). All data obtained from this site will be used for the completion of aClosure Plan for this HWSA.

The additional sampling described in this addendum was conducted to fill data gapsexisting after the original pre-closure sampling report. Specifically, these data gaps are:

The anomalously high concentrations of semi-volatile organic compounds(SVOCs) found at the surface soils of the westernmost corner of the HWSA.

* The extent of VOCs previously detected in the groundwater. The findings of thisinvestigation define the extent of the contaminants from this HWSA.

1M2EPC4~WS 2.1

OHIO RICKENBACKERAIR NATIONAL GUARD BASE

ALAW I U

Mfg e aware 37 ire allAWhite ksh

Sulphur/ -., Stratf ord 35 r

ellpol t 14 14 unb

S'. Yotts 315 Lewis 11m .10 lienCtr. Hoove

dinAny 11 3 Res.wow 23 Cents.

N aw CAVERNS Village "'657ow Hill

ilifornia Powell Wes, 0 Get6 7 ille A.32. isN Central ...... rGrab-o *ng to.n 7 College ille ocrxal,

N St. NEW.2

tin 62 Albany M037 Sr. MEN.U M US.'lliard . I H e1- 14 it 8summ .......

7M ....... .. 4kNKLIN Sla. utVille

irkers- 10 H e 0113 Re n Idsbueg mvmx. Jl villew-4

40 115 ... ....79ferson, rj tic ey(

La e,L ..... ........U anc st62 2 ..... Millers - "c"Ie ........ Po LAKE I

-17 ST. PARK.e es- Ci 7il e Pleasan 3Shade- urston NmCors. 104 tir ... Baltim re I-

ae

tho- Carroll Pleasant-Harrisbur L P Ii 158 @ ville

orton, Commercial 674 21 WestM Point ise Rushvill

Derby a r 190 23 S. I

ICKAWAY Bloomfield lRoyalton316 2 37

Ash- 188 ancasteDarbrille ville so .

\ qa I FIGURE' I FAIRFIELIMILES LOCATION MAP

SOURCE- 0 5 10 15 RICKENBACKER'MAP OF OHIO AIR NATIONAL GUARD BASEAMERICAN AUTOMOBILE ASSOCIATION

ESENGINEERING-SCIENCE2-2

SCALA

-BASEBOUNDAR HZROSWST.AE SOAEAE

- SASEDETMLD RICKENBACER NBOSEC~iOAL MAA

2-3 E ENGNEERNG-SIENC

SECTION 3.0

BACKGROUND

The Rickenbacker Air National Guard Base (the Base) is located 12 miles southeast

of Columbus, Ohio, and one half mile east of the Village of Lockbourne (Figure 1). Thefacility has been in use as an air field since 1942 when it was activated as theNortheastern Training Center of the Army Air Corps. Portions of the facility are

currently under ownership of the Rickenbacker Port Authority (RPA).

The former HWSA at the Base consists of Building 560 and the fenced in drum

storage area southeast of the building. The site is under a Part A Permit for the storageof hazardous wastes, and was used to store drummed wastes from the Base from 1983until September 1986. Materials that were stored here were spent solvents, cleaning

fluids, acids, paint strippers, and spent desicc-" its. Four 25,000-gallon undergroundstorage tanks (USTs) are located in the southeastern comer of the drum storage areas.

One of the USTs is situated within the area defined by the perimeter fence of the drum

storage area. The USTs are not described by the Part A Permit, and were not used to

store hazardous waste. Two of the tanks have been used to store de-icing fluid, one tank

for recyclable JP-4 jet fuel, and one tank for the storage of recyclable oil.

0192EPCI94-UWS 3-1

I

SECTION 4.0

I FIELD INVESTIGATION PROGRAM

3 Field activities conducted during this investigation include groundwater screening,

monitoring well installation and soil sampling from the well borings, surface soilu sampling, and groundwater sampling.

4.1 Groundwater Screening

A groundwater screening survey was conducted on 7 through 9 October 1991 to

determine the extent of volatile organic compound (VOC) contamination previously

detected in the groundwater at the HWSA. Groundwater screening samples were

collected from the shallow aquifer, approximately 15 to 20 feet below grade, at eighteenlocations on and around the HWSA using a GEOPROBETm system. Locations of the

screening points and the results of the analysis are contained on Figure 3.IThe PSP proposed 24 groundwater sampling points. These would be installed

downgradient (south and east) of the known contamination, and in the immediate

vicinity of MW5.

U The purpose of this sampling was twofold. The initial interest is to identify the

extent of the contaminant plume and locate downgradient wells outside of the plume.The second interest is to further characterize the extent of phase-separated hydrocarbon

(PSH) in the vicinity of MW5.

The GEOPROBE m system utilizes a hydraulic hammer to drive a 3/4-inch, outer-

diameter, steel probe to the water table. These probes have a 3/8-inch lumen and come

in 3-foot sections which thread together. The downhole end of the probe is fitted with a

stainless-steel, right-circular conical, sacrificial drive point. Upon reaching the desired

_ depth of sample, the probe is extracted approximately six inches causing separation of

the drive point and allowing groundwater to flow into the probe lumen. The

groundwater screening sample is extracted from the probe using a clean TeflonTm tube

equipped with a stainless steel check ball. The tube is surged inside the probe to

enhance sample recovery. Typical sample recovery is 100 to 200 milliliters of water.

The groundwater screening sample is then decanted directly from the Teflon Tm tube into

a standard 40 milliliter vial until the vial is half full, approximately 20 milliliters.

3 O192EPCI9..3#W5 4.1

ioz

0

50 0 so

SCALE IN FEET-J 0

+

-4-

+4*

LEGEND: 0

L[iiII] UST

H - STEAM LINE (x FENCE

10dW-3 MONITORING WELL(TOTAL VOCs IN ug/L)

ND-+W' MONITORING WELL (NON - DETECT)MW5 MONITORING WELL

PS (PHASE-SEPARATED HYDROCARBONS) \

APPROXIMATE EXTENT OF VOCsIN GROUNDWATER

GW-13166W1 GROUNDWATER SCREENING POINT(TOTAL VOC IN PARTS PER BILLION)

ND aGW-14 GROUNDWATER SCREENING POINT(NON -DETECT VOCs)

( EXTENT OF PHASE-SEPARATED HYDROCARBONS

SOURCE:

BASE DETAILEDSECTIONAL MAPS

4\,\

y~

/ /

6 _ " ,,/~

• Jr

EXET FVOinSALO GONDAE

051 '6 '" Q

R Cf AN kOI

FIGURE 3

HAZARDOUS WASTE STORAGE AREAEXTENT OF VOCs in SHALLOW GROUNDWATER

RICKENBACKER ANGB, OHIO

IQ4-2 -ES ENGINEERING-SCIENCE

IDuplicate screening samples in the ratio of one for every ten total samples are also

collected.

The headspace of the vial was analyzed immediately on site in a Hewlett-Packard

5890A Series I1 gas chromatograph equipped with a flame ionization detector. The

method of analysis used is a modified United States (US) Environmental Protection

Agency (EPA) Method 601/602. The analytical process takes approximately one-halfhour per sample and is capable of detecting calibrated compounds of 1 microgram per

liter (Ag/L) or greater. The chromatograph was calibrated specifically for analysis of

the headspace vapor.

U The results of the groundwater screening technique allow for rapid delineation of

extent of target compounds in groundwater. The target compounds used in this survey

I include benzene, toluene, ethylbenzene, xylenes, and trichloroethylene which had been

detected in groundwater samples from existing monitoring wells at this site.IDecontamination procedures for the probes comply with those outlined in the PSP.

Used TeflonTh tubing was discarded, and new tubing was used for each sample.

4.2 Monitoring Well Installation

Three monitoring wells were sited and drilled based on the results of the

groundwater screening. These wells were drilled, sampled and constructed in

accordance with the procedures outlined in the PSP. Locations of these wells are

identified on Figure 3 of this report. Soil samples were obtained for analysis during the

boring of these monitoring wells. Boring logs and monitoring well construction logs arecontained in Appendix A of this report.

The wells were located in areas downgradient of the known contaminant plume

adjacent to groundwater screening locations which had not indicated detectable target

VOCs. The PSP proposed the installation of six monitoring wells. Three wells were

omitted because the plume was not as extensive as described in the PSP, and there was

no indication of groundwater contamination near the three USTs northeast of the site.

I 192EPCL9%W 4.3

I

- 4.3 Surface Soil Sampling

Surface soil samples were collected from ten locations near the westernmost comer

of the HWSA. Procedures used to collect these samples comply with those described in

the PSP. One duplicate soil sample (SS 3 DUP) was also obtained.

The surface soil sampling locations were changed from the locations suggested in

I the PSP based on several factors which include accessibility, ease of sample recovery,

and apparent use of the neighboring property. The neighboring property is used for

_ salvage storage and is paved which would make sampling with a trowel difficult. The

neighboring property was also under construction at the time of sampling further

complicating access. The ten suggested sampling locations were changed at the requestof the field team leader and approved by A. Harlick and T. Shope of HAZWRAP on 9

October 1991. The ten locations were evenly distributed between the HWSA fenceline

and the fenceline associated with the neighboring property. the representatives of theOEPA were made aware of the field change the day of sampling.

4.4 Groundwater Sampling

-U Groundwater samples were collected from ten of the 12 wells on site. Wells MW1

and MW5 were not sampled due to measurable thicknesses of phase-separated

I hydrocarbons. Sample recovery from wells MW3, MW8, and MW9 were limited to

VOCs because of poor groundwater recharge. Complete aliquots were collected from

each of the other wells on site. The groundwater sampling was carried out in

accordance with the procedures outlined in the PSP.

I

I

I

i 6192EPC194-4#W$ 4.4

II

SECFON 5.0

I FIELD INVESTIGATION FINDINGS

5.1 Groundwater Results

The data obtained through the groundwater screening and groundwater sampling

were plotted on a map of the site (see Figure 3). The data indicate that VOCcontamination is restricted to a relatively small area surrounding the four underground

storage tanks (USTs) located at the southernmost comer of the site. Wells MW1 and

MW5, where phase-separated hydrocarbons were observed, lie in the northern and

furthest upgradient portion of this contaminant plume. The groundwater sampling data

plotted in Figure 3 are also presented on Table 1. The downgradient edge of the VOCplume is well documented by the non-detect analyses of wells MW10, MW11, and

MW12.

Groundwater analysis from the October 1991 field effort duplicated groundwateranalysis from February 1990 for MW2 through MW8. The 1991 analysis indicated non-

detectable VOCs in MW4, MW9, MW10, MW1, and MW12. The 1990 analysis

indicated similar data for MW2, MW4 and MW9. Table 1 contains results from boththe 1990 and 1991 sampling events.

5.2 Soil Results

I Surface soil samples were collected at ten locations near the westernmost corner ofthe HWSA. Five of these samples were collected at the fenceline surrounding the site,

-- the remaining five from locations off site. One sample (SS3) was collected in duplicate.All surface soil samples were analyzed for SVOCs and the priority pollutant metals. Soil

samples were also obtained from two soil horizons during the boring of the three

monitoring wells.

- Results of the SVOC analyses were tabulated and totaled by sampling location.

These totalled data are plotted on Figure 4 of this report and tabulated on Table 2. The

higher concentrations of total SVOCs are associated with four of the five surface soilsamples collected outside the HWSA compound.

II 1ISEPC1iN-S.UWS 5.1

,-00000000

I 0 0 0000000

OO000000 00

I ~1 F: -- --

< uL

*l Rw I-C fW~cr m S

Lu 0 a 0< 000 . . . .ID

I*0000800 w. 002

:3( < 0L0chI

o~~ ~ ~ 3' <vv v vZyv m

U)N 0 0 0 0 0 0 CL

cc -- - ~ - < N

IL ,J 2.

< 0 z de.C00 000 S 0 USSCcr

= - I "c

0 f

4 a <C1ZI~~~ ~

-----------

"- -5O-2

IW 0

83 Cf)V CV) ~ V'

ICl) V V V -V vvv0 V V V r

<0 § 9 0 I

z2 0" §§0" 0 -

uC) - -- - 2 --- --2

cc~v VV V~ ccvc vvvC

ui c v vv v 00000 9000 0

z 00WLUOC!30000000000000 00 0020 00 0

.c 01c U

:)00 U)U a 0 00 0 0

5 -3 2-000 0

50 0 so

SCALE IN FEET

-I-11 10

LEGEND:

OUTLINE OF HAZARDOUS WASTESTORAGE AREA

MONITORING WELL

Z7 ,UST

H STEAM LINE

x FENCE1 190A SURFACE SOIL SAMPLING LOCATION

SS3 (TOTAL SVOCs IN ug/Kg)

SOURCE:

BASE DETAILEDSECTIONAL MAPS

I+

"l

FIUR 44

,. . 9

TOTA S1 INSRAC OL

,IKNBCE ANG HI

5-' ,/,,/

44,% r

7FIGUR444

RICKNBACERCNGBO i

0.'ESENIN EN-.4C4Er,. . m l m m m m l •/

I~ an

UL!LWWWW vc')WWUWWW WU, z zzzz '-zznzzzzz

0 NU 0 .2

LU,

a:<~W C)W

0zz w z Q;IO CD -

C -W ~W W ~ W W

< comZ.~~Z ZZ Z Z

cozz <z o0 0Z~

L-S

w 0 Z* W. z

IImn

~a~we r. ~ V

'NEE ~ S2EE0

V MA I- E

5-5

These surface soil data, when related to existing semi-volatile data, indicate that thecontamination in the area of SS5, SS6, and SSIO appear to be from within the HWSA.

The contaminants detected in SS3, SS4, SS8 and SS9 appear to be unrelated to thisHWSA since no SVOCs were detected in samples SS2 and SS1.

The soil samples from the well borings indicate levels of his (2-ethylhexyl) phthalatefrom 120J to 440 in each of the samples. This compound was not detected in other

subsurface soil samples. Although it does not appear to be a laboratory contaminantbased upon the data validation notes contained in Appendix B of this report, due to theuniform distribution at which the compound was reported, and that the compound wasnot reported at the site previously, and that the compound was not reported in anygroundwater samples, it may be suggested that his (2-ethylhexyl) phthalate wasintroduced into the samples from an unknown source, and is not an actual contaminant

at the site.

Soil sample MW12 (13-15) was obtained from the well boring for MW12 from thesoil interval from 13-15 feet below grade. The analytical results (Table 2) from thissample indicate several SVOCs. None of these compounds was detected in thegroundwater sample from this well. It may be assumed that these data are the result of

a naturally occurring anomalous organic matter in the soil at that location.

Results of priority pollutant metals analyses of the shallow soils indicate the

presence of several metals above the Base background established during theInstallation Restoration Program investigation. The metals arsenic, cadmium, lead, zinc

and to a limited extent copper, nickel and silver are found in concentrations in excess ofbackground levels. Table 3 tabulates these data.

5.3 Hydrogeology

The three well borings advanced at the site during this field investigation,

encountered materials of similar description to those seen previously at this site.

Soil from the ground surface down to eight feet is characterized by a medium brown

silty clay, with trace amounts of pebbles. This layer grades into a grayish silty clay fromeight to 14 feet, with moisture encountered at ten feet. Further description of soil andgroundwater is contained in the Pre-Closure Sampling Report, draft, October 1990.

OMEPC19H3G#WS

AY~

50 0 50

SCALE IN FEETt 0

-4.

-4-

.44-

LEGEND:

74 MONITORING WELL (W/DATUM)7281

UST

-H- STEAM LINE

x FENCE

-728 - GROUNDWATER CONTOUR LINE

SOURCE:

BASE DETAILEDSECTIONAL MAPS

,j

4-"

\X,

FIGURE 5

HAZARDOUS WASTE STORAGE AREAGROUNDWATER ELEVATION MAP

17 OCTOBER 1991

RICKENBACKER ANGB, OHIO

5-7 ES ENGINEERING--SCIENCE

TABLE 4GROUNDWATER ELEVATIONS

17-Oct-91HAZARDOUS WASTE STORAGE AREA

RICKENBACKER ANGB, OHIO

ELEVATIONWELL PROTECTIVE DEPTH TO DEPTH TO GROUNDWATER

CASING FLUID WATER ELEVATION

I RB-HW-MW1 743.43 14.73 14.78 728.69RB-HW-MW2 743.25 -- 14.77 728.38RB-HW-MW3 743.89 -- 15.43 728.46RB-HW-MW4 745.01 -- 15.65 729.36RB-HW-MW5 744.99 Sheen 16.49 728.50RB-HW-MW6 744.99 -- 16.58 728.41RB-HW-MW7 745.16 -- 17.25 727.91RB-HW-MW8 743.74 -- 15.87 727.87RB-HW-MW9 745.12 -- 17.03 728.09

RB-HW-MW10 742.44 -- 14.06 728.38RB-HW-MW11 744.04 -- 15.83 728.21

I RB-HW-MW12 742.87 -- 15.79 728.08

Correction formula for PSH thickness.Assume density of PSH to be 80% that of water[(depth to water - depth to fluid) * 0.8] = correction.Groundwater = depth to water + correction

IIIIIIII 5-8

I

I Water levels in all 12 wells at this site were monitored on 17 October 1991. The

groundwater elevation map generated using this data is illustrated on Figure 5 and

tabulated on Table 4. It confirms groundwater flow to the southeast, and a slight rising

of groundwater potentiometric surface near the USTs.

Wells MW3, MW8 and MW9 exhibited poor recharge during purging and sampling

perhaps indicating severe impact from the dry summer preceding the investigation.According to the Monthly Water Inventory Report for Ohio which is published by the

Ohio Department of Natural Resources, Division of Water, rainfall from May through

October of 1991 was 7.68 inches below normal for the Columbus area.

IIIIIIIiIIII

I*12EC14-W5 3-9

II

SECTION 6.0

I CONCLUSIONS AND RECOMMENDATIONS

6.1 Conclusions

The analytical results indicate soil contamination in throughout the HWSA down todepths of over fifteen feet, as well as contamination of the groundwater with organic

solvents and fuel components. Consequently, removal of all of the contamination, toeffect a clean closure is not a practical option. The extent of contaminants at the HWSA

has been defined, and a closure plan will be compiled for review and approval by the

Ohio EPA.

6.2 Recommendations

I An appropriate remediation method would initiate a groundwater cleanup

engineered to remove contaminants from the groundwater at the site. The surface soilswould remain in place during this operation. When groundwater quality is deemed to beacceptable, determination of status of the soils would be determined. Further

evaluation of the risk to human health and the environment may be necessary duringthis final evaluation. Removal of the USTs at the HWSA is fundamental to instituting

* cleanup of this site.

IIIIIII

I $~192Ei94.3IQW5 -

II

SECTION 7.0

I REFERENCES

Engineering-Science, Inc., Pre-Closure Sampling Report. Hazardous Waste StorageA= draft October 1990, Addendum #6 to the Pre-Closure Sampling Plan

Crano, Nicolas and Eric Ahlgren, "Groundwater Survey, Rickenbacker ANGB, Ohio",October 1991 Burlington Environmental\Mathes Division

IIIIIII

IIII

3 *192E7CI9.3#WS 7.1

IIIIIIUII

APPENDIX A

I MONITORING WELL LOGS/CONSTRUCTION DIAGRAMS

II

IIIIIIII *192EC19436#WS

I AREV DAIE j"R i9B-

BORING LOGI BORING/WELL NO.: RB-HW-MWJO I Page 1 O f

Instollotion: RICKENBACKER ANGB I Site: HWSA-560

project No.: CL115.40 I Client/Project: HAZWRAP

HAZWRAP Contractor: ENGINEERING-SCIENCE Drig Contractor: JOHN MATHES 8 ASSOC Driller:

Drlg Started: 10/14/91 ( 10:55 A m) DrIg Ended: 10/14/91 ( 11:30 A m) Borehole dia(s): 6 I

Drlg Method/Rig Type: HOLLOW STEM AUGER/CME-45Logged by: RLPATTON E-log(Y/, From to _ Protection ieve: .

I . CY,, c

I Lithologic Description C \ ° ' 1 0 p\\ .$o'a ° e("° e'

-II; DRY, BROWN, SILTY CLAY, BROWN AND GREY 11S I Y 16 MOTTLING, NO HC ODOR OR STAINING. 13

5 1312

IiDRY TO DAMP, BROWN, STIFF SILTY CLAY, 5 -

- 2 N 28 NO HC ODOR OR STAINING. 6 -10 - --- 12--

17--I 10-1

GREY, VERY FINE GRAINED SAND WITH TRACE 17- 3 Y 11.4 SILT, NO HC ODOR OR STAIN 8

15 12I 26 -

m BOH=IB'.

E 20-

25

I30 II

35 IU - Thin wall tube R = Rock coring Field G/C(Make/Mod.)

S = Split spoon(tube) 0 = Other G/C Oper.:

C = Cuttings Notes: xx

FIGURE 4.2MONITORING WELL CONSTRUCTION LOG - Double CasedRV.OT:JN99

WELL NO.: MW-10 lInstallation: RICKENBACKER ANGB Site: HWSA-560u 7Iproject No.: CL115.40 IClient/Project: HAZWRAPHAZWRAP Contractor: ENGINEERING-SCIENCE Drig Contractor: MATHES &. ASSOC

Camp. Start: 10/14/91 (11:30 A m) Comp. End: 10/14/91 C13:55 Pm)

BitB:Well Coord: __________________

E~ev.PROTECTIVE CSG

Eegh Material/Type STEEL

Diameter 4__________________________ELev. Depth BGS 3' - Weep Hole ('Height - --------

GUR POT jCS Elev. ___ UR OT ~'CS Height U-00' No. 3 Type STEEL

Depth BGS ~SURFACE PAD 2x'CNRTComposition & Size 2x'CNRT

SURFACE CSCTypeDiameter _____ ____Total length

GROUT:L Setup/Hydration Time__ _____________

Composition & Proportions

Interval BOS_________________ _____

Tremied (Y/N)I~ RISER PIPEType - SCH 40 PVCDiameter 2

Total Length (TOC to TOS)

- - - -- --- Composition & Proportions

interval BGS 0-4' BGS

.CENTSALIZER (YA93 ~ ~~~~~~~~~~~~~Depth(s) ___________________________

TypeSource

6Setup/Hydration Time -______Vol. Fluid Added ______

Tremied (YIN)

FILTER PACKType WASH OTTAWA SANDS

Amount Used 3 BAGS-Source _ _ _ _ _ _ _ _ _ _ _

10 1Cr. Size Dist___________________________Tremnied (YIA

Type SCH 40 VT ~Diameter 2'

18 ~Slot Size & Type 0.010

SuMe ()_______Interval BGS Lnt

Bottom Cap &N) LntI _____________PLUG

MaterialSetup/Hydration Time____________ _________

3 Tremied (Y/N)

I Borehole di

01 15WIDD

I CLI 15.40.03 ES ENGINEERING-SCIENCE

REV DATE .AN. 1989

BORING LOG I BORING/WELL NO.: RB-HW-MW1l I Page of___

installation: RICKENBACKER ANGB ISite: HWSA-560project No.: CL1I5.40 IClient/Project: HAZWRAPHAZWRAP Contractor: ENGINEERING-SCIENCEI Drig Contractor: JOHN MATHES & ASSOCI Driller:IDrig Started: 10/15/91 ( 09:35 Amn) Drig Ended: 10/15/91 (10:30 A m) Borehole dio(s): 6'Drig Method/Rig Type: HOLLOW STEM AUGER/CME-45Logged by: RLPATTON IE-log(Yi/J From _______to _______ Protection level: D

*_L90Ltooi Description p ,al# 0 e

DRY, BROWN, SILTY CLAY, TRACE FINE 13-IY72.3 LIMESTONE GRAVELS, NO HC ODOR OR 25L

5- STAINING. 1916

BROWN SILTY CLAY, DRY, NO HC ODOR OR 9 -S 2 N S5.1 X STAIN, TRACE GRAVEL (FINE), GREY MOTTLING 13 -

18 -

18

-S3Y3. GREYISH-BROWN SILT, CLAY W/TRACE SAND. 6-SAND, BROWN COARSE, AND GRAVEL, WET AND 6-

15 8-1-SILTY, NO HC ODOR OR STAINING. 20 -

I BOH=1B'.

I 20

25-

U = hin wall tube R - Rock coring Field G/C(Moke/Mod.)

S = split spoon(tube) 0 -Other G/C Oper.

C=Cuttings Notes-____________________________________________ OIVI

* FIGURE 4.2KV. DATE! JA" 1989

MONITORING WELL CONSTRUCTION LOG - Double Cased

WELL NO.: MW-11 In1stallation: RICKENBACKER ANGB Tite: HW'SA-56CIproject No.: CL115.40 IClient/Project: HAZWRAPHAZWRAP Contractor: ENGINEERING-SCIENCE Drig Contractor: MATHES &. Assoc.Comp. Start: 10/15/91 C10:30 A m) Comp. End: 10/15/91 C13.3C Pm)!

Built By: Well Coord: ____________________

ELev. ____PROTECTIVE CSQ TEHeight Material/TypeSTE

Diameter 4ELev. Depth BGS 3' - Weep Hole (v/aHeight - ---- GARD POSTS O)'GS Height 0 No. 3Type STrEEL

Depth BGS ~SURFACE PAD ex'CNRTComposition & Size 2'CNET

SURFACE CSGTypeDiameter _____ ____Total length

GOTSetup/Hydration Time_______________Composition & Proportions

Interval BGS_______________________Tremied (Y/N)

R ISER PIPESH4 VType SH4 VDiameter 2'Total Length (TOC to TOS) 10.5

GROUT _

- -- -- -- -- Composititon & roportions

Interval BGS ________________ _____

Tremied (Y 1 ®

* ~~~~~~~Depth(s) ____________

Type 1/4' BENTONITE PELLETSSource W~YDMING

55Setup/Hydration Time -______Vol. Fluid Added 2 GALLNS

Fi ~ Tremied (Y/(S75 FILTER PACK

Type U1TTA\A WdASHED SANDSAmount Used 3 BAGSSource _ _ _ _ _ _ _ _ _ _ _

10Cr. Size Dist___________________________Tremied Cr/N)

Type SCH 40PVT T Diameter 2'17. - -- - - -Slot Size & Type 0.010,

sum1A (YO~17____5_ interval BCS Length

Bottom Cap (Y/N)

BCLL PLUMaterial

T 175Setup/Hydration Time___________ _________

Borehoe digTremied (Y/0)

CLi 15.40.03 ES ENGINEERING- SCIENCE

REY DATE "JJ 1989

BORING LOG BlORING/WELL NO.: RB-HWbMW12 Page 1of

Installation: RICKENBACKER ANGB ISite: HWSA-560

project No.: CL115.40 IClient/Project: HAZ'SRAP

HAZWRAP Contractor: ENGINEERING-SCIENCEI Drlg Contractor: JOHN MATHES & ASSO Dre:

Drig Started: 10/15/91 ( 14:30 P m) IDrlg Ended: 10/15/91 (25M0 P m) IBorehole dia(s):

Drig Method/Rig Type: HOLLOW STEM AUGER/CME45Logged by: RLPATTON IE-log(Y,® From _______to I______ Protection leve!: D

l 99

0-0

BROWN AND GREY, STIFF, SILTY CLAY WITH 7S 1 Y 43.1 TRACE LITHIC GRAVEL, NO HC ODOR OR 6

5I STAINING.7

BROWN GREY SILTY CLAY, DAMP-TO-MOIST, 8-S 2 N 2:3 SLIGHTY MOTTLED, TRACE LITHIC GRAVEL, 12-I 10 xNO HC ODOR OR STAINING. 12-

16 -

SPOON WETi BROWN CSE SAND AND FINE-5S 3 Y D4.5 GRAVEL, NO HC ODOR OR STAINING.I 15 x25 -

I BOH=18'.

I 20

25

* 30

U - Thin wall tube R - Rock coring Field G/C(Make/Mod.)

S - sitn oon(tube) 0 -Other /C Oper.:

FIGURE 4.2MONITORING WELL CONSTRUCTION LOG - Double Cased REV. DATE: J"N 1989

WELL NO.: MW-12 linstallation: RICKENBACKER ANGB _Site, HWS A -56 0

project No.: CL115.40 ICliet/Project: HAZ\JRAPHAZWRAP Contractor: ENGINEERING-SCIENCE DrIg Contractor: MATHES &. ASSOJC

Comp. Start: 10/15/91 (15:00 P mn) Comp. End: 10/16/91 C11:00 A -)I

Buil By:Well Coord:

ELev. ____PROTECTIVE CSQ

Height ____Materiol/Type STEELDiameter 4

ElLev. Depth BCS 3' Weep Hole GHeight - ------ GUR POT YNCS Elev.____UADPSS(N'CS Height 0.00' No. 3 Type STEELDepth BS SURFACE PAD

Composition & Size 2'x2' CONCRETE

SURFACE CSGTypeDiameter _____ ____Total length

GROUTJI Setup/Hydration Time_______________Composition & Proportions

Interval BGS_______________________Tremied (Y/N)

R ISER PIPESH4 VType SH4 V

Diameter 2_ _ __ _ __ _

Total Length (TOC to TOS) '

3 Composition & Proportions

Interval BCS_______________________

Tremied (Y0CENTRALIZER (YA9Depth(s)_____________________________

4 ]5__ __ _

i~fl Type BENTIJNITE PELLETSSource W/YOM[NG

6 Setup/Hydration Time _____Vol. Fluid Added F GALLONSTremied (Yo

ri - FILTER PACK-Type UTTA'WA SANDS

Amount Used 3 BAGS

10 L10 - Cr. Size DistTremied (Y/N)

Type SCH 40UVDiameter 2'

18 ---- Slot Size & Type 0.010,

.S1JM- (vfi))18 -_________Interval 805 Length

Bottom Cap &N)

BACKILL PLUGMaterial _ _ _ _ _ _ _ _ _

Setup/Hydration Time____________________TO 18 Boeol Tremied (Y/N)

01 15W12E

CLi 15.40.03 ES ENGINEERING- SCIENCE

IIIIIIIII APPENDIX B

I ANALYTICAL DATA VALIDATION NOTES

IIIIIIIII *192EPC194.U#W5

APPENDIX BANALYTICAL DATA VALIDATION NOTES

This appendix presents a summary and review of quality assurance and quality

control results for the laboratory analysis of H20 and soil samples collected during 1991

phase of the site investigation at Rickenbacker Air National Guard Base (the Base) in

Columbus, Ohio. The analyses were performed by Engineering-Science (ES) Berkeley

Laboratory (BL).

The results from ESBL are divided into data packages which are assigned a work

order (WO) number. Each package contains the required quality control

documentation. Contract Laboratory Protocol (CLP) methods were required at the

time of these analyses according to "CLP Laboratory Data Validation EPA Functional

Guidelines for Evaluating Organics and Inorganic Analyses."

Each package was validated by reviewing holding times, method blanks, matrix

spike/matrix spike duplicates and field quality control samples. If the criteria as

specified by the EPA guidelines were not met, action was taken to indicate the

discrepancy. Validation notes will be "flagged" concerning any non-compliance to CLP

protocol.

The analytical results of the environmental and quality control samples were

evaluated to assess the representativeness, precision and accuracy, comparability and

completeness of the data. Representativeness was evaluated from the analytical results

of the trip blanks, field blanks, rinseate blanks, method blanks and field duplicate

samples. Precision and accuracy were evaluated by reviewing the laboratory matrix

spike sample (MS), and the matrix spike duplicate sample (MSD). The comparabilitywas evaluated by reviewing duplicate sample results. The completeness was evaluated

by reviewing the chain-of-custody with results.

All samples were analyzed within EPA data validation technical holding times.

Holding times are designated periods by EPA from sampling date to time of analysis.

Data Validation Flags - The following exceptions were outside the CLP acceptance

criteria and were acknowledged, or flagged accordingly. Data contained in Appendix C

of this report, reflect all validation notes.

I92DPC/-.2#WS .1-

In the Method Blank (MSBNA911023) and ES Samples SS4 (3377-04), SS6 (3377-

06), SS9 (3377-07) and 12-3-5 (3377-13), internal standard recoveries failed to meet

acceptance criteria. Analysis of a second aliquot of these samples were conducted and

gave similar results, indicating a possible matrix effect. The results of both analytical

runs are presented; "RA" is appended to the sample identifiers for the second run.

Sample 11-13-15 Matrix Spike (MS) (3377-12MS) showed percent recoveries for n-

nitroso-di-n-propylamine, 1,2,4-trichlorobenzene and pentachlorophenol that were

below acceptance criteria. The Relative Percent Differences (RPD) for 1,2,4-

trichlorobenzene acenaphthene and pentachlorophenol were above acceptance criteria.Analysis of a blank spike indicated the laboratory was in control with respect to these

compounds.

Samples 10-13-15 (3377-10), 12-3-5 (3377-13), and 12-13-15 (3377-14), internal

standard recoveries failed to meet acceptance criteria. Analyses of a second aliquot of

these samples were conducted and gave similar results, indicating a possible matrixeffect. The results of both analytical runs are presented; "RA" is appended to the

sample identifiers for the second run.

Sample 12-13-15 (3377-14) showed high surrogate recovery of two out of three

surrogates. Re-analysis produced acceptance results.

Preparation blanks and all Quality Control (QC) samples were analyzed using both

Inductively Coupled Plasa (ICP) and Graphite Furnace Atomic Absorption (GFAA)methods, resulting in two sets of QC data (one by ICP, one by GFAA) for lead. Allblank results which fall between the ICP Instrument Detection Limit (IDL) and five

times the ICP IDL of lead are flagged with "Y". The GFAA lead results for sample 11-13 is the valid result for that sample. The ICP lead result for this sample is for QCpurposes only.

The serial dilution sample result for zinc did not agree with the undiluted sampleresult for zinc within 10 percent, and the zinc result of the undiluted sample was greater

than 50 times the zinc IDL All zinc results in this batch are therefore flagged with "E".

Some analytical spike recoveries of selenium and thallium were less than 40 percent.These samples were diluted and re-analyzed; analytical spike recoveries were still less

than 40 percent. These selenium and thallium results are flagged with "E".

o192DPC/123.2S#ws .2.

I

In the method blank (MSBN911022) internal standard recoveries failed to meet

acceptance criteria. Analysis of a second aliquot of this sample was conducted and gave

similar results. All associated data were closely inspected. The laboratory has

determined this non-conformance to be an isolated occurrence. The results of both

analytical runs are presented; "RA" is appended to the sample identifiers for the second

un. Sample MW6 (3389-06) showed two surrogates in the base neutral fraction below

acceptance criteria. Re-extraction and re-analysis showed one surrogate above

acceptance criteria. The results of both analytical runs are presented; "RE" is appendedto the sample identifiers for the second run. All target analytes were undetected in

* either of the two analyses.

Sample MW3 (3389-01) showed high surrogate recoveries. Re-analysis gave similarresults, indicating a possible matrix effect. The results of both analytical runs are

presented; "RE" is appended to the sample identifiers for the second run.

IIIIIIIII

61@92D7C/123.234PW$ .3.

IIIIIIIII APPENDIX C

VALIDATED ANALYTiCAL DATA

IIIIIIIII *1~2EPC1944g#WS

II

I LEGEND FOR ORGANIC RESULT QUALIFIERS

I

* U The compound was analyzed for but not detected.

J The value reported is an estimated concentration. Thisis used when:1. The mass spectral data indicate the presence of a

compound that meets identification criteria, butthe result is less than the reporting limit;

2. Estimating the concentration for tentativelyidentified compounds (TICs) where a 1:1 response

* is assumed.

C This is used for pesticide results where identificationhas been confirmed by GC/MS.

B The analyte is found in the associated blank as well asin the sample.

I A A TIC is a suspected aldol-condensation product.

I E This flag identifies compounds whose concentrationsexceed the calibration range of the GC/MS instrumentfor that specific analysis.

D This flag identifies a compound whose reportedanalytical result is calculated from a greater dilutionthan the primary analysis. The actual dilution used tocalculate the analytical result is reported either on

* the report or in the case narrative.

N Indicates presumptive evidence of a compound. Thisflag is only used for TICs, where the identification isbased on a mass spectral library search. It is appliedto all TIC results.I

II

I

I LEGEND FOR INORGANIC RESULT QUALIFIERS

II

I B Reported value is less than Reporting limit butgreater than the IDL.

N Spiked sample recovery not within control limits.

I S Reported value was determined by the Method ofStandard Additions.U

* Duplicate analysis not within control limits.

I W Post digestion spike for Furnace AA analysis out ofcontrol limits (85-115%), while sample absorbanceis less than 50% of spike absorbance.

+ Correlation co-efficient for the MSA is less than0.995.

E The reported value is estimated because of thepresence of interference.

I R Quality Control indicates that data are not usable(compound may or may not be present). Re-sampling

i and re-analysis is necessary for verification.

IIUI

ILEGEND- 1 10/89

I92 R 9A S M R O O R

RIR R A .1 8 co00A

I5 C43t= -V (- -V )C)MC) 7 V

M0 0

I) C') =

0

MO

00

00

o -~ .~ G-S~

ou 0 o- co10o

0- o _ o 0

> rI L' 0Co6 ZU..-. scn i~ 0f., 1

Ag-oono n 0090 0

AM0000000000000co0 00000000000

CO

@ m 000 00 00 0o O OQ O000

C)

Cl)I A9 2 8 8§ 1893fZ99 30 i9

ccIIC E.c fE0

I4 c* oo ooo oo~~ooo~ ~

I C~ 0

m w ) so 0U)0vv v mt~~iaCwcco 5 0 Cc 5c

0

0

000000000000000 00008

0 c

0)0

00

to -a9 If 2C

I0 CMN., C0I 4F , C4 4N C 1c*4VC-

CI

c j - gC'2W

0

co=

0

o

0 CD

CC)

co0I6r, U ~0 100 0-2*4acNP8 O

ccI1 2 OvI LL.C cV o : o c 5i oC

IfIdci c)C) ci C) mC) 0CV V r r V NCI

_0

0

ml N000 0000 0NN000N00N N NNN;

00

a z

C0 SL t ,

ED£

.04II rc 0 8. 1'a 2-I Z! jCfl0~~~ ~ OJ---~c4Jt lc Ic ie

III1IL

00

m-t-

00

m-.:)M-Imv; ;-- V I o 00000000000000000000000

(00

c. 2 8 I0rls M-%CI ,-i C')'§

I~ D I~ ) COCc)'q I~ OC'

IqZ4 C, 2 ,V ,C 0 w )1 sc 0c

?.IL* 0 09 o19aoco 0 8 8 0

I 00

cJo-III

*~~~ Cc I00 ooC000 0 00 0 8

c r 0

0.Igl

L 2 x. fi I *10 t

C=*M l ~ V ~ INYv C~ eCM -A V 'N E V4 l Cl NM, C0

0

m*I0800OO0ONCOCOSCROO OO

S0 000 000 0 00 0 00000 00 000 000

In I cn

-0 0 0 0 0 0 0 0 0 0 0 0 03I

N00 0 00-0m0 0 0cIe

A L)OI jiC 69 m1 12 (qI II I , ~ 0 a c

L-v v CO U.2 *~wcO : MOSS 06

0DW

0 t

00

rII0

0 0 s t ) )0

a

M ~ ~ ~~~ 'a I z 5 I5002z l~I, _u I- 5 LIV L)xL

CI cy oc! qc0ylt v Ii0 q '0V t 't

0) ------------- ----------

I

0I1- -I -I I I I i - I I I I - - - - - - - - - - -

I IoIooIoI ooIoI oeIoI IoII I oII ooI ooIIo

0I1I

0

I

II

I . 0

_-- - - - - - - - -

ww - w~ ~ -- -- - -- --

;DZ ~

a)~

Ic

- --------------- ---------- W----- Lf---)---

I ~--- - ------------ ----- -------DCO

-a) 7a ----------------------- ----- )-tl--

0* E'0J E ooo oo oo ooo oo oo oo ooo)oo oo

0 ~ ---- C-- --- --- --- -- - -- -- -- I

0

82~ ~ ~ 0 sXS0 b 05850 i

IV 00 X 0 q u EL x _ zOCL~.~ Co cy IM NNo 0 0,Z , ":0 v: "t Cm cYc'

-- _ -------11 1 I 11 1 11

IIc

0 0

0 '

-~~Z. 6) ---- -- -- -- - --

0f0

(n 0 0 L L L o

III L

FI

CL0

0 I

I u~ 0Ia -J weIIIIIIIIIIIIIIIII-E S r0

a0 0 D0RaCr

1 I. I iE 25 50 ZE(R Z i 5t

I~U W q cq :I I Ooi I oCLMV xc ~

ZI O O C O O OO O O O O 0 0IC

Ic

ICL 0

o.0.o

=5 .5CLC d,

4)1 -6 £l - Os- 60

2 CL I 1 U 5c 5'Sn a vvZ' LC c nm 5 c OO

C)

0

IP

n0

o

0

00

8. o4 8 -a~ ~ z~ aa.5C1 S

>- 0 a" 5 5 )u

0

in

fn II I I I I I I I I I I I I I iCh

0

I 0

0

0

S= owe -S M1IIr

00 1 Cii5 -8~ .~ n n-1.1S& )i 2 (M)4 oI- I )XF

---------- --- ----------------

I Ic ---- ------- --------------

-1 c

I- O c c - - - - - - - - - - - - - - - -

0

-I C

Iw

00

0 E l

Io IIN l f-00 fa.1 .1 0 w(h o cS01- J L

0II

c'cm

I - ---- --- --- ----------------- ------

c'JQE-I mcI i

0~- Oki 4In ~= ~ --- ---- --- --- ---- --- --- --M* q

Ilga I I NJC.J

Mn e a C--5 --- -- -- -- -- -- -- - -aC- q AIoVc, 4L

ccI0 ' oi 0 L

0

0

0

CO -

U)~ ~~~ c--- -- - - - -- !--- - - -

CC

AD .1 wM

-- -. 000 -O-O -- - -- - -- - -- 0- -- 0-0-- -0---

-- -- - - -- -- -- -- -- -- - -- - -- - --

0 0

0

C Cu

-- ~~i Z- -2 "- C- e000 00 'r) 000050 0 0 00BIr-0q N0g z z .*51 rC .0-~~~0 ~ CY 00 0 ~ 0 0 0 0 0 0 0 0 0 0 0 0 0 w

IjII

I --------- --- -- ------------------

CL 0

-- ----I- --I-

IC

CL 0

0 . 0 80 C

s- - E o cya*~ E

cIO co 0VIl0 I Cl 0.oINeuI " " I CAZc

E

00

-0) 0 CI 056w6o6 -

E E

-00 IT 0l-000l llE E

coE

z

-~~ Ci)O M .- 6O D- M&g Mo

E EE0I1

co z

0 f MI

00

IZ*Z CD D U

U) q nM $( ) c

to 0 4 N~~- . 4_n cn c -a - S *IE E4cOOC~N ~ ~ ~ O.JZOfIN ~ *a

Ia tE E iii III III-

0

ZII 3mu~Z4.

0

Z4

00C CO m .OOO

o E E0

0 o

DI)C C )u

I 6 E0

zI1

0 E E

I 0

> CL.

c. 0 0 . c mcoo~ 0 4 1*Ccn 0 - r4 a 2 Zct0.

IZ

aon E 0~00~

o0

E EKI0

z z

,1 - ONVJ ocmooo-E EI0

0 'tII II lIi II I I II I'~cl :" ( I I IllI I l -

0 E

MA cc

In 1 2IE

0 0

~C* ~ 2 *

0 cy

I..

0

= LE E

-l)I cC)ci

I

04E E

IO v N ' w 0 C') 00m

Z. z

-00- 0q 0 r6-0 E E

-0I

M 0,Ina2< o )U0_ a NIIL Z0 22c =

IIc0

I~ -J

-o v co c;t

0

I -J

I C"

0<

COCLC c')J C ('C abz

0

I ZZ! WzI. u30oc oIl DV)q f

I LEDo

w~ -It

C CI

S

E E E ?I 2~ o.' _ 0

CLft-

I<Iz

0-0

z Zz z w:L

-CO'CO MC m mJM MIY CO, - r, CD0

0

z z

ZZZ Z~~~~~3 wJ O~....'.N CO

zz m mmm-r

I 3: w-aC O6~ -oO c' C'jNc N z

0

I<0

00

I .3to

I~ co ..

OO...J Z a.

MIommM M )nMDcI q q C q qId

IlI0

0-

~jI

CL 0

0

Q (A

IL aIocIm ). 4) C~)c )000