ML18075A080

Sharpe Army Depot NRC Kickoff Meeting Presentation (SHAD-041) (5 Mar 18)

ML18075A080
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Issue date:	03/16/2018
From:	Richard Chang Division of Decommissioning, Uranium Recovery and Waste Programs
To:
RChang DUWP
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ML18075A077	List: ML18075A078 ML18075A079 ML18075A080
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Download: ML18075A080 (20)

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Sharpe Army Depot, California Sites 33/29 (SHAD041)

March 5, 2018

1. Installation Location Sharpe Army Depot 2

1. Site Location Sites 33/29 (SHAD041)

• SHAD041 is located in the southcentral portion of the installation, adjacent to the gate on Lathrop Road.

• SHAD041 is relatively flat, sparsely vegetated, and no buildings are present.

SHAD041 3

2. Operational History Sharpe Army Depot

• Sharpe Army Depot was established in 1941 and is approximately 720 acres

• For most of its existence, the installations principal missions have been to store, ship, and package general supplies and maintain equipment.

• Early mission included repair and reconditioning of both heavy equipment vehicles, helicopters and fixed winged aircraft.

• Sharpe Army Depot was transitioned to the Defense Logistics Agency in 1997 and renamed Defense Distribution Depot San Joaquin.

• In 2013, the installation was transferred back to the Army and designated to Installation Management Command. The Presidio of Monterey was designated with caretaker authority until the property is excessed.

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2. Operational History Sites 33/29 (SHAD041)

• During the 1960s, solid waste from paint stripping operations was regularly mixed into the soils and burned at SHAD041 (ESE, 1994a).

• Other wastes disposed of at SHAD041 burn pits include wood, paper, empty paint/solvent cans, waste paint/solvents, waste oil, used hydraulic fluid and anything else that would burn. (ESE, 1994a)

• Radium paint, dials, gauges and other commodities may have also been disposed of at the SHAD041 burn pits (Tidewater, 2012).

• Contaminated fuel was not reportedly disposed of at SHAD041 (ESE, 1994a).

• SHAD041 is currently no longer actively used.

• At Present:

• Army and Air Force Exchange Service operates a distribution center in the southern portion of the Depot.

• The Marines conduct military reserve training in the northwestern corner of Sharpe Army Depot.

• The California Army National Guard owns approximately 53 acres in the northern portion of Sharpe Army Dept. 5

3. Previous Investigations Sites 33/29 (SHAD041)

• 1980 - Preliminary Assessment

• 1993/1994 - Remedial Investigation (ESE, 1994a) - Metals only

• 22 soil samples indicated the presence of elevated lead and chromium concentrations in soil (ESE, 1994a); identification of eight burial trenches and pits.

• 1996 - OU 2 Record of Decision (ROD) signed (ESE, 1996); lead and total chromium clean up levels defined.

• 1996 - Site delineation (Radian, 2000)

• Total chromium and lead were less than cleanup levels.

• Results of leachability testing did not exceed soluble action levels.

• No threat to onsite adult workers or to groundwater quality.

• 1996 - OU 2 ROD signed (ESE, 1996); removal of lead & chromium contaminated soil

• 1998 Additional site characterization conducted at the request of the Central Valley Regional Water Quality Control Board (Radian, 2000).

• Total chromium and total lead concentrations were less than cleanup levels.

• No threat to onsite adult workers or groundwater quality. No action required.

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3. Previous Investigations Sites 33/29 (SHAD041)

• 2011 - OU 2 ROD Amendment implemented LUCs at SHAD041 to protect human health and the environment (URS, 2011).

• 2012 A gamma walkover survey was performed over the majority of SHAD041. Levels of radioactivity were detected above background.

• Two soil sample locations were identified at locations with the highest direct measurements identified during the walkover survey.

• Samples were collected from two intervals: 06 and 618 and were sent for offsite analysis. Total radium concentrations were above background (Tidewater, 2012).

• As a temporary safety measure, a fence and warning signs were installed around the area of highest potential radiological concern.

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4. Regulatory Engagement Sites 33/29 (SHAD041)

• Sharpe Army Depot was placed on the National Priorities List in 1987 and entered into a fourparty Federal Facilities Agreement (FFA) in 1989.

• The four organizations on the FFA are:

• The U.S. Environmental Protection Agency Region 9,

• The California Environmental Protection Agency, including the Department of Toxic Substances Control and Central Valley Regional Water Quality Control Board, and

• The U.S. Army (Sharpe Army Depot/Presidio of Monterey)

• The remedial project management team meets:

• Quarterly in person at the site

• Monthly via conference call 8

5. Current Investigation Sites 33/29 (SHAD041)

• The next step in the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) process is a Remedial Investigation/Feasibility Study (RI/FS).

• The RI/FS will delineate surface and subsurface contamination (both radiological and nonradiological).

• Field work was completed Oct 2017.

• For radium226, approximately 21 sample locations were selected; multiple samples were collected at different depths (from surface to 14 feet below ground surface) at each location.

• The Draft RI/FS Report is scheduled for completion in Spring 2018.

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6. References Sites 33/29 (SHAD041)

• ESE, 1994a. Remedial Investigation/Feasibility Study at Sharpe Site, Soils Feasibility Study Report. Final. December.

• ESE, 1994b. Remedial Investigation/Feasibility Study at Sharpe Site, Soils Risk Assessment, Volume I and II. Final. December.

• ESE, 1996. Record of Decision, Basewide Remedy (Operable Unit 2 Soils).

February.

• Radian International (Radian), 2000. Operable Unit 2 No Further Action Remedial Report. December.

• URS, 2011. Amendment to the Record of Decision, Basewide Remedy (Operable Unit 2 Soils). June.

• Tidewater, 2012. Phase I Historical Review, Scoping Survey, and Remedial Recommendations Report for the DLA Defense Depot Joaquin Center Sharpe Site Lathrop, CA. Final. February.

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