#05-05 ihss group ne-1, pac nw-1505 · bz-a-000836 i . environmental restoration rfca standard...

..

KAISEReHILL c O M ? A N T

Environmental Restoration RFCA Standard Operating Protocol

for. Routine Soil Remediation FY05 Notification #05-05

IHSS Group NE-1, PAC NW-1505 - the North Firing Range

- ... . ,.

. .. . . . . . . . ._

March 2005

BZ-A-000836 I

Environmental Restoration RFCA Standard Operating Protocol

for Routine Soil Remediation FY05 Notification #OS05

IHSS Group NE-I, PAC NW-1505 - North Firing Range

Approval received from the U.S. Environmental Protection Agency, Region VI11 March 23,2005

Approval letter contained in the Administrative Record.

March 2005

ER RSOP FY05 Notification #OS05

TABLE OF CONTENTS

1 . 0 INTRODUCTION ....................................................................................................... 1

2.1 Project Conditions ..................................................................................................... 5

2.3 Remediation Plan .................................................................................................... 23 2.4 Stewardship Evaluation .......................................................................................... 23

2.4.1 Proximity to Other Contaminant Sources ........................................................ 24

2.4.3 Monitoring ....................................................................................................... 25 2.4.4 Stewardship Actions and Recommendations ................................................... 25

2.5 Accelerated Action Remediation Goals .................................................................. 26 2.6 Treatment ................................................................................................................ 26

2.8 Administrative Record Documents ............................................ .. ............................ 26 2.9 Projected Schedule .................................................................................................. 27

3.0 PUBLIC PARTICIPATION ...................................................................................... 27

2.0

5 . --_._. . -. .. ........ 22.. Subsurface Soil Risk Screen .....................................................................................

IHSS GROUP NE.1. PAC NW-1505 ......................................................................... 5 . .

2.4.2 Surface Water Protection ................................................................................. 24

.. . .. .......... - - .... . . . - .-.- ....... -. .. .. 2.7 RCRA Units and Intended Waste Disposition ................................................ ...$...-. .... ~ ..

4.0 REFERENCES ......................................................................................................... 27

LIST OF FIGURES

Figure 1 IHSS Group NE.1. PAC NW-1505 Location ....................................................... 2

Figure 2 IHSS Group NE-1, PAC NW-1505 Detailed Location ........................................ 3

Figure 3 IHSS Group NE-1, PAC NW-1505 Analytical Results Greater Than

Figure 4 IHSS Group NE-1, PAC NW-1505 Analytical Results Greater Than

Background Means Plus Two Standard Deviations (Outer) .......................................... 7

Background Means Plus Two Standard Deviations (Inner) .......................................... 8

LIST OF TABLES

Table 1 IHSS Group NE.1. PAC NW.1505. Comparison of SW-846 6200 and

Table 2 IHSS Group NE.1. PAC NW.1505. North Firing Range Analytical Results %

S W-846 60 10 Analytical Methods for Arsenic ............................................................. 4

Greater Than Background Means Plus Two Standard Deviations ................................ 9

I

ER RSOP FY05 Notification #05-05

AL bgs BMP BZ

COC D&D DOE EDDIE EPA ER ER RSOP

._.-_ - - . CDPHE

ft FY IA IABZSAP ICP IHSS mgn<g mg/L NA PAC PCOC PDF POC POE PU&D RAO RCRA RFCA WETS RL RSOP SAP Site SSRS voc WRW XRF

ACRONYMS action level below ground surface best management practice Buffer Zone Colorado Department of Public Health and Environment -- -

contaminant of concern decontamination and decommissioning U.S. Department of Energy Environmental Data Dynamic Information Exchange U.S. Environmental Protection Agency Environmental Restoration Environmental Restoration RFCA Standard Operating Protocol for Routine Soil Remediation foot .- Fiscal Year Industrial Area Industrial Area and Buffer Zone Sampling and Analysis Plan inductively coupled plasma (spectrometry) Individual Hazardous Substance Site milligram per kilogram milligram per liter not applicable Potential Area of Concern potential contaminant of concern Portable Document Format Point of Compliance Point of Evaluation Property Utilization and Disposal remedial action objective Resource Conservation and Recovery Act Rocky Flats Cleanup Agreement Rocky Flats Environmental Technology Site reporting limit RFCA Standard Operating Protocol Sampling and Analysis Plan Rocky Flats Environmental Technology Site Subsurface Soil Risk Screen volatile organic compound wildlife refuge worker \

x-ray fluorescence

_ _ __ - -_ .

ER RSOP FYOS Notification #OS05

1.0 INTRODUCTION

This Environmental Restoration (ER) Rocky Flats Cleanup Agreement (RFCA) (DOE et al. 2003) Standard Operating Protocol (RSOP) for Routine Soil Remediation (ER RSOP) (DOE 2004a) Fiscal Year (FY) 2005 (FY05) Notification addresses the remediation of a Potential Area of Concern (PAC) in the Rocky Flats Environmental Technology Site (RFETS or Site) Buffer Zone (BZ) during FY05. The purpose of this Notification is to invoke the ER RSOP for Individual Hazardous Substance Site (IHSS) Group NE-1, PAC NW-1505, referred to as the North Firing Range. Activities specified in the ER RSOP are not reiterated here; however, deviations from the ER RSOP are included where appropriate.

The general location of the North Firing Range is shown on Figure 1, and details are shown on Figure 2. Accelerated action sampling was performed under Industrial Area

I --- - -J(A+andrBuffer Zone-Sampling and Analysis Plan (SAP) (IABZSAP) Addendum- - -.- ,--

#IABZ-05-01 (DOE 2004b). Based on the accelerated action sampling, lead is the potential contaminant of concern (PCOC) at this site.

Soil with contaminant concentrations greater than the RFCA wildlife refuge worker (WRW) action levels (ALs), or as indicated by the Subsurface Soil Risk Screen (SSRS), and associated debris will be removed in accordance with RFCA (DOE et al. 2003) and the ER RSOP (DOE 2004a). The Corrective Action at Outdoor Shooting Ranges Guidance Document (CDPHE, 2005) was reviewed as part of accelerated action planning. It states on page 3 that, "Shooting ranges ... subject to corrective action under a compliance order must be remediated in accordance with the applicable legal requirements." Since RFETS is subject to a compliance order (RFCA), the North Firing Range will be remediated using RFCA. The cleanup standard for lead in RFCA is 1000 milligram per kilogram (mgkg). This standard is based on EPA's Revised Interim Soil Lead Guidance for CERCLA Sites and RCRA Corrective Action Facilities (I 994). As such, the action at the North Firing Range will be to remove the lead hot spots (greater than 1000 mgkg) as waste.

Through the consultative process it was agreed that remediation for arsenic at concentrations greater than the RFCA WRW AL, when analyzed using the on-site SW-846 6200 method (on-site, x-ray, fluorescence w ] ) , is not warranted. Arsenic concentrations determined using the SW-846 6200 method compared to the more accurate off-site SW-846 601 0 method (off-site, inductively coupled plasma [ICP] spectrometry) are up to several orders of magnitude greater, as shown in Table 1. (Results listed in Table 1 are from eight original locations with comparative data and 16 additional samples collected by resampling existing locations.) Method SW-846 60 10 results are given preference in tables and on figures. Method SW-846 6200 results are presented only in cases where they are the only available analpica1 data. In the case of arsenic only, SW-846 6200 analytiial results will not result in accelerated action.

One of four original lead exceedances (location BV53-03 1 , 1,540 milligrams per kilogram [mgkg]); determined using the SW-846 6200 (XRF) method, was not confirmed when results determined by the preferred S W-846 60 10 (ICP) method became available (equivalent location BV53-047,650 mgkg).

t e

. . _. - -. . __ 1

5

754000

752000

750000

748000

746000

744000

2 0 7 6 0 0 0 2078000 2080000 2082000 208iooo 2086000 2 0 8 8 0 0 0 2090000

2076000 2078000 2080000 2082000 2084000 2086000 2088000 2090000

.754000

.752000

.750000

.748000

-746000

-744000

FIGURE 1 IHSS Group NE-I

North Firing Range General Location

PAC NW-1505

KEY

TI 0 PACNW-1505

Potential Area of Concern (PAC)

Feature removed from

Building demolished

I I Building standing

f\/ Paved road

:-\, ; , , , .-' 1 Dirt road

f\/ Stream

Pond

Topographic contour-5 ft

+ S

500 0 500 1000 1500 2000 Fee

Scale = 1 : 15000

State Plane Coordinate Projection Colorado Central Zone

Datum: NAD 27

U.S. Department of Energy Rocky Flats Environmental Technology Site

KAlSER+HILL C 0 M P A N Y

:ile: WIProjectslFy2005/NE-l~North~Firing~Range notitication020305.apr Date: 2/3/200!

201

752600

752400

752200

752000

751 800

751 600

751 400

I

201

+

+

+

752600

752400

752200

752000

751800

751600

751400

FIGURE 2

IHSS Group NE-I

North Firing Range Detailed Location

PAC NW-1505

KEY

Potential Area of

Building or structure removed

U Concern (PAC)

0 ,-\ ; from PAC NW-1505

,' ', ; Dirt road I .*

Stream or ditch

Topographic contour-5 fi

50 0 50 100 150 200 250 Feet

Scale = 1:2000 State Plane Coordinate Projection

Colorado Central Zone Datum: NAD 27

U.S. Department of Energy. :ocky Flats Environmental Technology Site

KAlSER*HILL C 0 M P A N Y

le: WIProjects/Fy2005/NE-l-North-Firing-Range otification020305.apr Date: 2/3/200:

e

BV53-0 17 #(A) BV53-020 #(A)

, . .. . .- . -

43.500 6.500 NA NA mgkg 36.700 NA BV53-049 4.500 mgkg


BV53-034 #(A) BV53-043 #(A)

Table 1 IHSS Group NE-1, PAC NW-1505

Comparison of SW-846 6200 and SW-846 6010 Analytical Methods for Arsenic

I

42.800 NA BV53-048 4.000 mgkg 70.800 NA BV53-045 4.600 mgkg

BV53-026 #(A) 46.900 I BV53-027 #(A) 29.800 BV53-028 #(A) 50.8OC , - .I

BV53-029 #(A) 839.000 I NA I BV53-055 I 12.000 I m#g

BV53-031 #(A) I 134.000 I NA I BV53-047 I 3.700 I mgkg I BV53-030 i

Interval A = 0.0-0.5 ft, Interval B = 0.5-2.5 ft NA = not applicable Additional sample interval = 0.0-0.25 ft Detection limit for all 6200 analyses = 10.0 mgkg Detection limit for all 60 10 analyses 5 1.2 mgkg

(Based on Global Positioning System coordinates for both locations, BV53-047 is approximately 0.19 ft (about 2.25 inches) from BV53-03 1 .) Therefore, only three locations will be remediated. _I_ __

4

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2.0 IHSS GROUP NE-1, PAC NW-1505

This Notification covers areas of the North Firing Range requiring action, as indicated by the accelerated action soil data shown on Figures 3 and 4 and listed in Table 2. Note that IHSS Group NE-1 also includes Ponds A-1 through A-5, B-1 through B-5,-and-C-l-and -. C-2. Although shown on Figure 1, the ponds are addressed in separate documents.

__ __ . ____- -.

Figures 3 and 4 and Table 2 present accelerated action results for the North Firing Range that are greater than background means plus two standard deviations or reporting. WRW AL exceedances for the accelerated action sampling are shown on Figures 3 and 4 (in red) and listed in Table 2 (in bold). Arsenic WRW AL exceedances determined by the SW-846 6200 method that will not result in accelerated action are shown in green on Figures 3 and 4 and have gray fill in Table 2.

2.1 Project Conditions -I--- * 1 +--a. _-.-.- PAC NW-1505 consists of the WETS North Firing Range. The range was constructed in 1983 and upgraded in 1994 and 1996. The principal firearms used at the range were pistols and rifles; however, machine guns up to 0.50 caliber and shotguns were also fired. Shotgun practice was confined to target shooting at paper silhouettes; no clay pigeons were used.

It appears from photographs that the south face of the north berm was cut back twice in the past (i.e. dug out to the north). Soil was excavated from the south face of the north berm for the first time during the 1994 upgrade to accommodate installation of a roof for the range and a mechanical target management system. The second excavation event occurred during the 1996 upgrade to accommodate additional space for a bullet trap mechanism behind the targets.

The concrete slab, range roof structure, target system, bullet trap, asphalt-paved parking area, buildings, and storage cargo containers at the North Firing Range have been removed as part of decontamination and decommissioning (D&D) (Figure 2).

Features remaining at the North Firing Range are the east, west, and north berms and the culvert beneath the northeastern corner of the berm area (Figure 2).

2.2 Subsurface Soil Risk Screen

An SSRS is performed when non-radionuclides and uranium are present in the soil at depths greater than six inches below ground surface (bgs), and when americium or plutonium is present at depths exceeding 3 ft bgs. Current site conditions are evaluated by the SSRS to determine whether remediation is required. Any accelerated actions performed, confirmation sampling results, and a revised SSRS will be documented in the IHSS Group NE-1, PAC NW-1505 Closeout Report. The SSRS follows the steps identified on Figure 3 of Attachment 5 of RFCA (DOE et al. 2003).

Screen 1 -Are contaminant of concern (COC) concentrations below RFCA Modification Table 3 soil ALs for the WR W? Yes. Based on the accelerated action sampling, all subsurface metal concentrations were below the WRW ALs except for arsenic (see below). Ten locations (BU53-001, a .

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ER RSOP FY05 Notification #OS05 ~ ~~ ~

BU53-002, BV53-038, BV53-039, BV53-040, BV53-041, BV53-042, BV54-000, BW54-002, and BW54-003, Figure 3) across the north side of the north berm were sampled from 0.5 to 2.5 feet and analyzed using the EPA SW-846 6200 method. Five locations exhibited arsenic concentrations greater than the WRW AL (BU53-001, BU53-002, BV53-041 , BV53-042, and BV54-000). Because these arsenic results were derived from the SW-846 6200 method they will-not be remediated. The PCOC, lead, was not detected above background means plus two standard deviations in any of the ten samples from these locations (including the associated surface samples) (Figure 3).

Screens 2 and 3 are not required if the answer to Screen 1 is “yes”.

Screen 4 - Is there an environmental pathway and sufficient quantity of COCs that would cause an exceedance of surface water standards? No. The North Firing Range does not lie within an area prone to landslides or high erosion, as shown on RFCA Attachment 5, Figure 1 (DOE et al. 2003).

6

~


Table 2 , I

IHSS Group NE-1, PAC NW-1505, North Firing Range Analytical Results Greater Than Bachround Means Plus Two Standard Deviations

ER RSOP FYOS Notification #05-05 p / i

10 I

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m 0 a

9

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-

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0 s (A

0 0 m m m o o

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0 0 0 0 0 0 0 0 0 N N W

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w o o 0 0 0

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m a w 0 0 0

m m m m m m 4 ' 4 4

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m m m a 0 0

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I 00Z99PS-MS I S'O I 0'0 I 87P OOO'OOP92 I 000'628 I 809'ZSOZSL I

F

BV53-0 I5 BV53-015


752 104.003 208 1894.643 Iron 34000.000 307000.000 18037.&IoO m g k g 0.0 0.5 SW-846 6200 752 104.003 208 1894.643 Lead 375.000 1000.000 54.620 rng/kg 0.0 0.5 SW-846 6200

13


14

\

BV53-025 BV53-025 BV 5 3 -02 5 BV53-025 BV 5 3 -025

e

,752090.959 208 1880.52 1 Barium 724.000 26400.000 141.260 m g k g 0.0 0.5 SW-846 6200 752090.959 208 1880.52 1 Chromium 48.200 268.000 16.990 m g k g 0.0 0.5 SW-846 6200 752090.959 208 1880.52 1 Cobalt 11.100 1550.000 10.910 m g k g 0.0 0.5 SW-846 6200 752090.959 208 1880.52 1 Iron 36500.000 307000.000 18037.000 m g k g 0.0 0.5 SW-846 6200 752090.959 208 1880.52 1 Lead 139.000 1000.000 54.620 m g k g 0.0 0.5 - SW-846 6200

, f i

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ER RSOP FY05 Notification #05-05 I

I I I I I I A , I I

I I I I I

BV 53-03 5 BV53-035

16

752040.642 2081855.3 12 Vanadium 10 1 .ooo 7 150.000 45.590 mgkg 0.0 0.5 SW-846 6200 752040.642 2081855.3 12 Zinc 75.700 307000.000 73.760 mgkg 0.0 0.5 SW-846 6200

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e I ER RSOP FYO5 Notification #05-05

ER RSOP FY05 Notification #OS05 I

SW-8466200 I (BV53-04 1 I 752168.151 I 2081858.501 I Cobalt 1 12.300 I 1550.000 I 10.910 I mgkg 0.5 1 BV53-04 1 BV53-041 BV53-041

752168.15 1 208 1858.501 Iron 40400.000 307000.000 18037.000 m a g 0.0 0.5 SW-846 6200 752168:15 1 208 1858.50 1 Nickel 54.000 20400.000 14.910 mgkg 0.0 0.5 SW-846 6200 752168x 1 2081858.501 Strontium 244.000 61 3000.000 48.940 mgkg 0.0 0.5 SW-846 6200

BV5 3 -042 752179.559 208 189 1.857 Barium . 615.000 26400.000 289.380 mgkg 0.5 2.5 SW-846 6200 BV53-044 752048.533 2081760.295 Antimony 0.920 409.000 0.470 mgkg 0.0 0.3 SW-846 6010 BV53-044 752048.533 2081760.295 Lead 88.000 1000.000 54.620 mgkg 0.0 0.3 SW-846 6010

I ' 18 I


BV53-052 BV53-052 BV53-053 BV 5 3 -05 3 B V5 3 -053 BV53-054 BV53-054 BV53-054 BV53-054 BV53-054

18.060 mgikg 0.0 0.3 SW-846 6010 752095.858 208 1892.105 Copper 250.000 40900.000 752095.858 2081892.105 Lead 290.000 1000.000 54.620 mgikg 0.0 0.3 SW-846 6010 752099.592 208 1906.349 Antimony 1.400 409.000 0.470 mg/kg 0.0 0.3 SW-846 6010

18.060 mgkg 0.0 0.3 SW-846 6010 752099.592 208 1906.349 Lead 2 10.000 1000.000 54.620 mgikg 0.0 0.3 5 W-846 60 I O 752100.874 2081914.1 56 Aluminum 17000.000 228000.000 16902.000 mg/kg 0.0 0.3 5 W-846 60 10 7 52 1 00 374 208 19 14.156 Antimony 3.400 409.000 0.470 mgkg 0.0 0.3 5 W-846 60 I O 752100.874 208 19 14.156 Chromium 19.000 268.000 16.990 mgikg 0.0 0.3 5 W-846 60 10 752100.874 208 19 14.156 Copper 140.000 40900.000 18.060 mg/kg 0.0 0.3 5 W-846 60 10 752100.874 208 19 14.156 Lead 520.000 1000.000 54.620 mgikg 0.0 0.3 SW-846 6010

752099.592 208 1906.349 Copper 48,000 40900.000

R -c.

BW53-001 752 1 14.494 2082072. I44 Arsenic 13.000 22.200 10.090 mgkg 0.0 0.5 SW-846 6010 B W53-00 1 752 1 14.494 2082072.144 Chromium 19.000 268.000 16.990 mgkg 0.0 0.5 5 W-846 60 10 B W 5 3 -00 1 7521 14.494 2082072.144 Copper 1100.000 40900.000 18.060 mgkg 0.0 0.5 SW-846 6010 BW53-001 752114.494 2082072.144 Lead 3500.000 1000.000 54.620 mg/kg 0.0 0.5 SW-8466010 ~

BW53-00 1 7521 14.494 2082072.144 Selenium 1.300 5 1 10.000 1.224 mgkg 0.0 0.5 SW-846 6010 BW53-00 1 7521 14.494 2082072.144 Tin 4.500 6 13000.000 2.900 mgkg 0.0 0.5 SW-846 6010 BW53-001 7521 14.494 2082072.144 Zinc 720.000 307000.000 73.760 mgikg 0.0 0.5 5 W-846 60 I O B W 53-002 752201.608 208 199 1.468 Arsenic 18.100 22.200 10.090 mgkg 0.0 0.5 SW-846 6200

ER RSOP FY05 Notification #Os-05

E; a 1


21

I P

B W54-003 752 199.769 2081994.951 Arsenic 16.600 22.200 10.090 mgkg 0.0 0.5 SW-846 6200 B W54-003 752199.769 208 1994.95 1 Barium 807.000 26400.000 141.260 mgkg 0.0 0.5 SW-846 6200 BW54-003 752199.769 208 1994.95 1 Chromium 50.300 268.000 16.990 m a g 0.0 0.5 SW-846 6200 BW54-003 ' 752199.769 208 1994.95 1 Iron 35200.000 307000.000 18037.000 mgkg 0.0 0.5 SW-846 6200 BW54-003 752 199.769 2081994.951 Manganese 4 1 1 .OOO 3480.000 365.080 m@g 0.0 0.5 SW-846 6200 BW54-003 752 199.769 2081994.951 Nickel 44.500 20400.000 14.910 mgkg 0.0 0.5 SW-846 6200 BW54-003 752 199.769 208 1994.95 1 Strontium 169.000 6 13000.000 48.940 mgkg 0.0 0.5 SW-846 6200 BW54-003 752199.769 2081994.951 Barium 8 17.000 26400.000 289.380 mgkg 0.5 2.5 SW-846 6200 B W54-003 752 199.769 2081994.951 Vanadium 102.000 7 150.000 88.490 mgkg 0.5 2.5 SW-846 6200 B W54-004 752 161.619 2081955.022 Aluminum 18000.000 228000.000 16902.000 mgkg 0.0 0.3 SW-846 6010 B W54-004 752 I6 1.619 208 1955.022 Beryllium 0.970 92 1 .OOO 0.966 mgkg 0.0 0.3 SW-846 6010

e I ER RSOP FYOS Notification #05-05

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a

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ER RSOP FY05 Notification #05-05 I

Furthermore, lead as the PCOC is not a subsurface soil issue at the North Firing Range. No other COCs are associated with this PAC that could potentially cause an exceedance of surface water standards. Nearby volatile organic compound (VOC) contamination of groundwater is attributed to the Property Utilization and Disposal (PU&D) Yard Plume and will not be addressed by this project:

2.3 Remediation Plan The accelerated action objectives include the following:

Remove three areas (Figures 3 and 4) of the North Firing Range containing lead contamination greater that the WRW AL. After the Accelerated Action Ecological Screening Evaluation (AAESE) is complete, a decision whether additional soil removal is warranted based on the AAESE will be made. If additional soil removal is not warranted, the berms will be flattened and spread out to create a low mound. The inner faces of the berms that may have been more impacted by bullets will be placed, as possible, on top of the current ground surface inside the berms. The outer berm material will be placed over this layer. If additional soil removal is warranted an AAESE notification will be developed.

Remove the culvert in the northeastern comer of the North Firing Range and associated soil containing lead contamination greater than the WRW AL at either end of the culvert and along the culvert excavation.

Where contaminated soil is removed, collect confirmation soil samples in accordance the IABZSAP (DOE 2004~).

Residual berm material will be used for fill at the project site or elsewhere at WETS. The project site will be regraded to match the preexisting grade. Accelerated action activities will be conducted in consultation with the U.S. Environmental Protection Agency (EPA) and Colorado Department of Public Health and Environment (CDPHE).

It is anticipated that after remediation there may be areas with concentrations of metals greater than background means plus two standard deviations, but below RFCA WRW ALs.

2.4 Stewardship Evaluation

Because the full extent of excavation and remediation is not known at this time, an additional stewardship evaluation will be conducted during remediation using the consultative process; this will be documented in the North Firing Range Closeout Report. A map will be provided showing the remediated areas, and a new map of residual contamination will be generated after remediation.

The following sections present the stewardship evaluation.

23


2.4.1

The PCOC at the North Firing Range is lead, and lead concentrations are not surface water or groundwater issues. Nearby VOC contamination of groundwater is attributed to the PU&D Yard Plume and will not be addressed by this project.

Proximity to Other Contaminant Sources

2.4.2 Surface Water Protection

Surface water protection includes several considerations; as discussed below.

Is there a path way to surface water from potential erosion to streams or drainages? Yes. The immediate area of the North Firing Range does not lie within zones of high erosion or landslide probability as shown on RFCA Attachment 5 Figure 1 (DOE et al. 2003). Most surface water from the North Firing Range area exits along a drainage ditch that runs east from the mouth of the culvert underlying the east berm

and range office area) occurs north into the dirt drainage ditch on the side of the road adjacent to the North Firing Range. This water tends to remain trapped in the ditch until it either evaporates or flows into the groundwater system. Unusual rains may result in overland sheet flows to the east from the ditch area toward the drainage from the corrugated metal pipe. Maps indicate these two drainages merge in a flat area at the western end of the Present Landfill. From the western end of the Present Landfill surface water is artificially directed around either side of the Landfill, reemerging east of the Landfill dam downstream in the No Name Gulch drainage.

Best management practices (BMPs) will be employed during accelerated action to minimize erosion caused by land disturbance.

Do characterization data indicate there are contaminants in surface soil? Yes, Accelerated action sampling indicates the presence of lead in surface soil in excess of the WRW AL at the North Firing Range (Figures 3 and 4 and Table 2).

Do monitoring results from Points of Evaluation (POEs) or Points of Compliance (POCs) indicate there are surface water impacts from the area under consideration ? No. The closest monitoring POE for the North Firing Range is surface water monitoring station GS56, located 1,350 feet (ft) east of the Present Landfill Pond (4,000 ft east of the North Firing Range) on No Name Gulch (Figure 1). Surface water directed around the Present Landfill is first monitored at this location. Further downstream the closest POC is surface water monitoring station GS03, on Walnut Creek at Indiana Street.

Downstream POE surface water monitoring station GS56 in No Name Gulch had a total lead exceedance of 0.0085 milligram per liter (mg/L) on March 25,2003. (The surface water AL is 0.0065 ma.) On March 26,2003, another sample was collected that contained 0.0013 mg/L of lead. Results from 10 subsequent sampling events following the March 25,2003 exceedance, did not exceed the lead background (0.00658 mg/L) through the end of June 2004 (the last available analytical results to date). In 12 sampling events between March 17,2003, and June 29,2004, surface water at GS56 exceeded the AL for aluminum on three occasions (March 25 and April 14,2003, and June 29,2004).

(Figure 2). Additional drainage (primarily from the former parking, storage container, -

24

ER RSOP FYOS Notification #OS05

It is difficult to associate analytical results from GS03 with any specific part of the GS03 drainage because the source area covers the entire IA and water is pumped from one sub-drainage into another. Based on WETS Environmental Media Management Automated Surface-Water Monitoring Highlights from the Second Quarter of FY2003 through the Fourth Quarter of FY2004, discharges through GS03 met all stream standards and were below reporting thresholds for all analytes.

Is the IHSS Group in an area with high erosion potential? No. The North Firing Range is not within the area of high erosion’potential shown on

I Attachment 5 Figure 1 (DOE et al. 2003).

2.4.3 Monitoring

Monitoring includes the following considerations:

Do monitoring results from POEs or POCs indicate there are groundwater impacts from the area under consideration? No. Currently there are no groundwater wells that monitor the North Firing Range. Groundwater well 01 597 was located off the northeastern comer of the North Firing Range; however, there is no analytical data available from that location, and the well has been abandoned (Figure 2). The closest active wells monitor the PU&D Yard VOC Plume that extends from these wells to the east-northeast (DOE 2004d).

Can the impact be traced to a specijk IHSS Group? No. The PCOC at the North Firing Range is lead, and lead concentrations are not a groundwater issue. Nearby VOC contamination of groundwater is attributed to the PU&D Yard Plume and will not be addressed by this project.

e Are additional monitoring stations needed? No.

Can existing monitoring locations be deleted of additional remediation is conducted? No. Existing monitoring locations cannot be deleted, because they are monitoring other contamination from outside the North Firing Range.

~

i I

. ,

2.4.4 Stewardship Actions and Recommendations

The current stewardship actions and recommendations for the North Firing Range are as follows:

Use BMPs to reduce erosion into surface water drainage.

Implement near-term institutional controls until final closure and stewardship decisions are implemented, including the following:

- Restrict access; and

- Control soil excavations through the Site Soil Disturbance Permit process.

Implement long-term stewardship actions, including the following: 0 25

I

I ER RSOP FY05 Notification #05-05

- Prohibitions on construction of buildings in the area;

- Restrictions on excavations or other soil disturbances; and

- Prohibitions on groundwater pumping in the area of the North Firing Range.

a These recommendations may change based on in-process remediation activities and other future RFETS remediation decisions.

2.5 Accelerated Action Remediation Goals

ER RSOP remedial action objectives (RAOs) include the following:

0 Provide a remedy consistent with the WETS goal of protection of human health and the environment;

Provide a remedy that minimizes the need for long-term maintenance and institutional or engineering controls; and

0

0

2.6 Treatment

Not applicable.

Minimize the spread of contaminants during implementation of accelerated actions. I

2.7 Not applicable.

RCRA Units and Intended Waste Disposition

2.8 Administrative Record Documents

CDPHE, 2005, Corrective Action at Outdoor Shooting Ranges Guidance Document, Hazardous Materials and Waste Management Division, Version One, January.

DOE, 2004, Environmental Restoration RFCA Standard Operating Protocol for Routine Soil Remediation, Modification 2, Rocky Flats Environmental Technology Site, Golden, Colorado, August.

DOE, 2004, Industrial Area and Buffer Zone Sampling and Analysis Plan Addendum #IABZ-05-01 IHSS Group NE-1, PAC NW-1505 (North Firing Range), Rocky Flats Environmental Technology Site, Golden, Colorado, November.

DOE, 2004, Industrial Area and Buffer Zone Sampling and Analysis Plan, Rocky Flats Environmental Technology Site, Golden, Colorado, May.

DOE, 2004, Third Quarter RFCA Groundwater Monitoring Report for Calendar Year 2004, Rocky Flats Environmental Technology Site, Golden, Colorado, December.

DOE, CDPHE, and EPA, 2003, Modifications to the Rocky Flats Cleanup Agreement Attachment, U.S. Department of Energy, Colorado Department of Public Health and

26

\


Environment, and U.S. Environmental Protection Agency, Rocky Flats .Environmental Technology Site, Golden, Colorado, June.

U.S. EPA, 1994, Revised Interim Soil Lead Guidance for CERCLA Sites and RCRA Corrective Action Facilities.

2.9 Projected Schedule

Remediation of the North Firing Range is expected to begin in the second quarter of FY05.

3.0 PUBLIC PARTICIPATION

ER RSOP Notification #05-05 activities will be discussed at the March 2005 ER/D&D Status meeting. A Portable Document Format (PDF) version of this Notification was provided to the local governments. This Notification is available at the Rocky Flats Reading Rooms and on the Environmental Data Dynamic Information Exchange (EDDIE) Website at www.rfets.gov/eddie.

4.0 REFERENCES

CDPHE, 2005, Corrective Action at Outdoor Shooting Ranges Guidance Document, Hazardous-Materials and Waste Management Division, Version One, Jkuary.

DOE, 2004a, Environmental Restoration RFCA Standard Operating Protocol for Routine Soil Remediation, Modification 2, Rocky Flats Environmental Technology Site, Golden, Colorado, August.

DOE, 2004b, Industrial Area and Buffer Zone Sampling and Analysis Plan Addendum #IABZ-05-01 for IHSS Group NE-1, PAC NW-1505 (North Firing Range), Rocky Flats Environmental Technology Site, Golden, Colorado, November.

DOE, 2004c, Industrial Area and Buffer Zone Sampling and Analysis Plan, Rocky Flats Environmental Technology Site, Golden, Colorado, May.

DOE, 2004d, Third Quarter RFCA Groundwater Monitoring Report for Calendar Year 2004, Rocky Flats Environmental Technology Site, Golden, Colorado, December.

DOE, CDPHE, and EPA, 2003, Modifications to the Rocky Flats Cleanup Agreement Attachment, U.S. Department of Energy, Colorado Department of Public Health and Environment, and U.S. Environmental Protection Agency, Rocky Flats Environmental Technology Site, Golden, Colorado, June.

U.S. EPA, 1994, Revised Interim Soil Lead Guidance for CERCLA Sites and RCRA Corrective Action Facilities.

~ 27

FIGURE 4

iHSS Group NE-1PAC NW-1505

North Firing RangeAnalytical Results

Greater Than Background MeansPlus Two Standard Deviations

(Inner)

20824002081200 2081400 2081600 2082000 20822002081000 2081800 2082600 2082800

Start depth (ft)l End depth (tt) I Method Start depth (ft) • End depth (ft) I Method

Start depth (ft) t End depth (ft) t Method

752600 KEY752600

Sampling location with results lessthan background means plus twostandard deviations

Sampling location witii result greaterthan background means plus twostandard deviations

Sampling location with result greaterthan wildlife refuge worker action levelRed font = result to be remediatedGreen font = result wHI not be remediated

(see document text)

Locations shown on Figure 3blue > background mean plus twostandard deviationsred > wildlife refuge worker action level

PAC NW-1505

Structure removed at PAC NW-1505

Dirt road

Stream

Pond

Topographic contour 5 ft

I Result I Rl I Wrwal I Bk+2sd I Unit I

I 1.200 I NA j 409.000 I 0.470 I mgflra I110.000 NA 1000.000 54.620 mo/kg22.000 NA 613000.000 2.900 mg/kg

- I .—I I 1 [ '

Start depth (ft) I End depth (ft) I Method

752400752400Locatio k. 1 Anatyte Start depth (ft) I End deptti (ft) I Method

13.500564008043 4 ooo

000900

1704§8°4.200

Location I Analyte Start depth (ft) • End depth (ft) I Method1.900 NA 409.000 0.4250.000 NA 40900.000 18.290.000 NA 1000.000 54.

Bk+2sdl Unit I Start depth (ft) E n d depth (ft) I Method

752200752200

Start dept t i (ft)

End detfh (ft) • Method22.40075 800726.00043 000

40000.000).00O800

SlfOJfcbulY)

EnddeMi { f t ) i Method Bk+2sdt Unit I Start derth (ft) E n d depth (ft) i Method752000752000

Bk+2sdi: Un« I Start depth (ft! I End depth (ft) I Method-846 6010-8466010

6010W-846 6010W-8466010

-846 6010-846 6010

Start depth €RJ End depth (ft) Method

SeleniumVanadium

End depth (ft) I Method

BV53-044 AntimonyBV53-044 Lead 751800751800 Scale =1:1000

50 0 50 100 150 200 250 Feet

State Plane Coordinate ProjectionColorado Central Zone

Datum: NAD 27

04710.090141.260

54 620

14,19tD

48.94045 590

Startdeoth(ft) i End depth (ft)

AluminumAntimony

8srR] l l A h w a l I Bk+2sd Startdeptt)(ft)| End depth (ft) i Method

Start depth (ft) I End depth (ft)ArsenicBariumChromium

NickelStrontium


U.S. Department of EnergyRocky Flats Environmental Technology Site

Startdepth(ft) l End depth (ft) I Method

Arsenic

ChromiumIron

751600751600

Prepared for:

KAISER*HILLCOMPANY

Prepared by:

751400751400

D5|2081000 2081200 2081400 2081600 2081800 2082000 2082200 20828002082400 2082600 File: W:\Projects\Fy2005\NE-1Nortti_Range

\notification020305.apr Date: 2/16/1

FIGURE 3

IHSS Group NE-1PAC NW-1505

North Firing RangeAnalytical Results

Greater Than Background MeansPlus Two Standard Deviations

(Outer)

20828002081000 20826002081600 20824002081200 2081400 20822002081800 2082000

Start ctepth (ft) ! End depth (ft) i MethodLocation ! Anatvte

752800752800

Location I Analyte i Unit I Start depth (ft) I End depth (ft) ronNickelStrontiumVanadiumBariumVanadium

BV53-003 I Arsenic53-003 I Barium

Chromium

Strontium KEYBk+2sd I Unit

10,0

18M7.O0014.91048.94045.590289 380

27 300794.00041.300

000

Start depth (ft) I End depth (fO i Method Sampling location with results less• than background means plus two

standard deviations

Sampling location with result greater• than background means plus two

standard deviations

Sampling location with result greaterthan wildlife refuge worker action level

• Red font = result to be remediatedGreen font = result will not be remediated

(see document text)

Locations shown on Figure 4blue > background mean plus two

• • standard deviationsred > wildlife refuge worker action level

I ; PAC NW-1505

P " I Structure removed at PAC NW-1505

Dirt road

Stream

Pond

Topographic contour 5 ft

1.30080.000

700ooo


22.20026400.000

000

10.090141.260

18037.00014.9tO48.940

7.300000

20035900.000

Start depth <ft> I End deoth (ft) I Method

Strontium 752600752600

10090141.2601 000

.08014.910

ArsenicBariumChromium

VanadiumArsenicBariumVanadium

13.140289.380

Start deoth (ft) I End depth (ft) I Method

22 300

8*88°35200.000

10 090141.

18037.00014.91048.940

i3W54-OO2

IArsenicBarium

Vanadium752400752400


ArsenicBarium.ChromiumIronNickelStrontiumVanadiumBarium

.00044.300175.85.7856.

Unit Start depth (ft)

Start deoth rttt • Enddeatfcflh16.99018037.000365.C14.9-

StrontiumTinVanadiumBarium

7150.00026400.000 ! Bid deettUftti Method

752200752200 End derjth ffli I Methodi8037"00014.910228000.000

2220026400

16902.00010090141.16.18037.000

W-846 6200W-846 6200

UStrontiumVanadiumZinc

depth (ft) t MethodI Start depth (ft)26400.0007150.000 228000.000

921.000

Start deotti iffl • End deathdepth (ft) I Method18.600

821.00037.

42100.000642.000

10090141260

18037.00014.91048.940

73:

NA 22 200•JA 26400.000>IA 268.000

7150.000307000.000

Start deoth <m I End deoth752000752000 10.

1 4 1 —16.990

00036508014.910

Approximate Ara»or Remediation

Scale = 1:1000Start depth (ft) I End depth (ft)

100 150 200 250 Feet505060101

W-S46 6010W - 8 4 6 6010

-846-8466200-846 6200

LeadSelenium

Zinc

State Plane Coordinate ProjectionColorado Central Zone

Datum: NAD 27

: Start deDuVfn i End death ffti

End depth (ft) j Method

22.200•iA 1 26400.000

000ArsenicBariumChromiumIronNfekelStrontium

18037.000365.08014.

75180018037.00014.91048.940

751800

U.S. Department of EnergyRocky Flats Environmental Technology Site

! Start deDth (ft) I Bk+2sd I UnitAnalvte Result18000.00022.000240.00014.000

2220026400.000268.000307000.000

10 090141.26016.99018037.00054.62014.91

ArsenicBarium.Chromiumron 35400.000

122.000

inr

Start death (ft) I End deoth (ft) Method

Prepared for:W-846 6010W-846 601

WW-846 6010

-846 6010

I Start depth (ft)17.000.000.000

15.000 AluminumAntimonyBerylliumLeab

KAISER*HILLCOMPANY


I End depth (ft) 1 MethodBV53-0073V53-007

53-007 751600BV53-008BV53-OO8

.10036 600

i 877.0007.400

34300.000

409.00022 200

0000.4701009014118037.00054.620

751600

Prepared by:IronLeadNickelStrontium

6200W-846 6200W

Strontium

Vanadium

2081000 2082800 File: W:\Projects\Fy2005\NE-1North_RangeI \notification020305apr

2081200 20826002081400 2081800 2082000 2082200 20824002081600

Date: 2/16/0i