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Defense General Supply Center

Current Site Information

EPA Region 3 (Mid-Atlantic)

Virginia
Chesterfield County
8 miles south of Richmond

EPA ID# VA3971520751

4th Congressional District

Last Update: August 2012

Other Names


Defense Supply Center Richmond
Richmond Defense General Supply
U.S. Defense General Supply Center

Current Site Status

The Defense Supply Center Richmond has completed remedial action construction at the Area 50 Landfill (Operable Unit (OU) 2), and a Remedial Action Completion Report (RACR) was finalized in June 2010. The Record of Decision (ROD) for the polycyclic aromatic hydrocarbon (PAH) area (OU 13) was finalized in December 2011. The selected remedial action for OU 13 consists of excavation and off-site disposal of approximately 55 cubic yards of soil in the low-lying wooded area and backfilling the excavated area with low-permeability clean soils. In addition, institutional controls, such as land-use and access restrictions, will be implemented at the site.

The remaining operable units (OUs 6 and 7) to be addressed consist of treating contaminated groundwater plumes at the facility. Treatability studies are underway at both of these sites, evaluating the effectiveness of permeable reactive barriers and enhanced bioremediation. The positive results from these studies indicate the treatment technologies may be successful in remediating the groundwater at the facility. The Proposed Plan for OU 7 was issued in January 2011. The preferred alternative is 1) enhanced bioremediation to treat groundwater in the source areas (near the Former Fire Training Areas) and downgradient portions of the groundwater plumes; 2) monitored natural attenuation of the portions of the plume outside of active treatment area 3) groundwater water monitoring; 4) surface water monitoring in Kingsland Creek; and 5) institutional controls to prevent exposure to the groundwater until cleanup goals are achieved. The public comment period ran from January 24, 2011 to March 11, 2011. The Record of Decision (ROD) for OU 7 should be finalized in Fall 2012. The Proposed Plan for OU 6 was issued in March 2012. The preferred alternative is 1) enhanced bioremediation to treat groundwater in the source areas and downgradient portions of the groundwater plumes; 2) monitored natural attenuation of the portions of the plume outside of active treatment area 3) groundwater water monitoring; 4) surface water monitoring in No Name Creek; and 5) institutional controls to prevent exposure to the groundwater and vapors from the groundwater until cleanup goals are achieved.

The remedy at OU 8 was documented in a 2007 ROD, where the chlorinated solvent groundwater plume is currently being treated through monitored natural attenuation and institutional controls. However, recent monitoring data show increasing contaminant concentrations in the plume source area and in some of the point-of-compliance wells. The facility planning team (which includes DLA and the regulatory agencies) decided to proceed with implementing the contingency remedy at OU 8, which includes enhanced bioremediation. An Explanation of Significant Differences was signed in September 2011.

Site Description

Defense Supply Center Richmond is a federal facility located in Chesterfield County, Virginia, about eight miles south of the city of Richmond. The site consists of approximately 640 acres that have been used as a Defense Logistics Agency supply center since 1941. Past operations conducted on site include aviation equipment manufacturing and repair, firefighter training, and the use and storage of hazardous materials. Current industrial operations include refurbishing helmets and steel compressed gas cylinders using dry (ball blasting) processes and tent fabrication and repair. Chemical operations at the site have included storing and shipping flammable, toxic, corrosive, and oxidizer chemicals as well as pesticides. In the 1960s and early 1970s, DSCR disposed of some of their waste material in a shallow ravine called the Area 50 Landfill. In the 1980s, groundwater contaminated primarily with volatile organic compounds (VOCs) was detected downgradient of the landfill, and the site was placed on the National Priorities List of hazardous waste sites.

Off-site residents are primarily served by a Chesterfield County-operated water supply system, although a few private home water supply wells remain in use in the locale. These are not in locations where a contaminated plume of groundwater has been detected.

Site Responsibility

This site is being addressed through federal actions.

NPL Listing History

This site was proposed to the National Priorities List of the most serious uncontrolled or abandoned hazardous waste sites requiring long-term remedial action on October 15, 1984. The site was formally added to the list July 22, 1987.

Threats and Contaminants

Groundwater is contaminated with volatile organic compounds (VOCs) and possibly metals from former chemical wastes disposal practices. Sediments are contaminated with pesticides and polycyclic aromatic hydrocarbons (PAHs). The soil contains VOCs and pesticides, and the surface water is contaminated with metals and pesticides. Those who accidentally ingest or come in direct contact with contaminated groundwater, surface water, soil, or sediments may be at risk.

Contaminant descriptions and risk factors are available from the Agency for Toxic Substances and Disease Registry, an arm of the CDC.

Cleanup Progress

Under the Federal Facility Agreement for this site, the cleanup has been divided into several different parts, called operable units (OUs). There are a total of 13 OUs at DSCR; nine are source (soil) areas, three are groundwater OUs and there is one groundwater interim action OU. Remedies for eight of the nine soil OUs have been completed; OU 13 is the remaining soil OU to be addressed. While a remedy is in place for groundwater OU 8, this remedy will change to a more active treatment as documents in the September 2011 ESD. A draft ROD is currently in review for groundwater at OU 6. The ROD for OU 7 is in the final stages.

The Open Storage Area (OU 1) was historically used for storage and recoupment activities. An interim ROD was signed in 1992; a revised Human Health Baseline Risk Assessment (HHBRA) and Explanation of Significant Differences (ESD) was issued in 2007. The remedy consists of Land Use Controls (LUCs) and annual inspections.

Area 50 Landfill (OU 2) was formerly used to dispose of chemicals and construction debris. The ROD was signed in 2008 and the remedy consisted of a soil cover and LUCs. The RACR was finalized in June 2010.

The soil within the National Guard Area (OU 3) was impacted by vehicle maintenance and degreasing activities. The remedy, documented in the 1995 ROD, consisted of an asphalt cover and LUCs. The soil at OU 4, the Former Fire Training Area, was found to need no further action (NFA) and the ROD was signed in 1999.

The Acid Neutralization Pit area (OU 5) consists of two former concrete settling tanks, used for the neutralization of acidic wastewater from metal cleaning and painting operations. The ROD was signed in 1992 and identified the use of a soil vapor extraction (SVE) system to reduce remaining VOC concentrations to below the soil remediation objective. However, upon further investigation using a pilot study, a full-scale SVE system was decided to be unnecessary and an ESD was signed in 1995. The ESD recommended no further action be required. The pits have been covered with concrete and LUCs are in place to limit future land use.

OU 6 consists of the groundwater contamination plume underneath OUs 1, 2 and 3. Contaminants of Potential Concern (COPCs) primarily include chlorinated VOCs. Bioremediation treatability studies have been performed in four source areas. OU 7 consists of the groundwater contamination plume beneath OUs 4 and 13. Similar to OU 6, the COPCs include chlorinated VOCs and bioremediation treatability studies have been performed at three source areas. This site is currently in the draft ROD stage.

The groundwater underneath OU 5 is being addressed as OU 8, which is a chlorinated VOC plume. The ROD was signed in 2007 and the remedy consists of monitored natural attenuation (MNA), with an in-situ bioremediation contingency. An ESD to document a shift to the contingency remedy was finalized in September 2011. Biannual (March and September) groundwater monitoring in accordance with the ROD and remedial design are ongoing.

OU 9 includes the interim remedy for OU 6, which was finalized through an interim action ROD in 1993. The action consisted of a groundwater extraction and air-stripping system to reduce mass and limit further transport of impacted groundwater off-site. A rebound test of the treatment system revealed the operation of the system was not necessary and an amendment to the interim ROD authorizing the decommissioning of the system was signed in 2008. The final remedial action for the OU 9 groundwater plume will be addressed through the action taken at OU 6.

The former Building 68 area (OU 10) was historically used as a pesticide storage building. The remedy documented in the 2007 ROD includes a vegetative cover and LUCs. The Transitory Shelter 202 area (OU 11) was formerly a storage area. The remedy, as finalized through the 2007 ROD, also consists of a vegetative cover and LUCs.

The former Building 112 area (OU 12) was historically used for pesticide storage and mixing operations. The ROD was signed in 2005 and the remedy included an asphalt cover, LUCs and groundwater monitoring for arsenic for five years.

The PAH area (OU 13) consists of a fuel oil spill area. The contaminants of concern include arsenic, dioxins and PAHs. The feasibility study was finalized in 2009. The ROD is currently being finalized.

Contacts

Site Contacts

Administrative Record Locations

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