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Record of Decision System (RODS)



City & State:  CHESTERFIELD COUNTY  VA  23237
EPA ID:  VA3971520751
EPA Region:  03
NPL Status:  Currently on the Final NPL
ROD Type:  Record of Decision
ROD ID:  EPA/ROD/R03-95/205
ROD Date:  09/29/1995
Operable Unit(s):  03
Media:  soils
Contaminant:  Metals, PAHs, SVOCs, VOCs
Abstract:  Please note that the text in this document summarizes the Record of Decision for the purposes of facilitating searching and retrieving key text on the ROD. It is not the officially approved abstract drafted by the EPA Regional offices. Once EPA Headquarters receives the official abstract, this text will be replaced.

The Defense General Supply Center (DGSC) is located in Chesterfield County, Virginia, approximately 11 miles south of the city of Richmond. Operable Unit (OU) 3 consists of the National Guard Area (NGA) soils. The NGA is a 15-acre site located on the east-central boundary of DGSC. It has been leased from DGSC by the Virginia Army National Guard since the 1950s.

The area is generally level and is primarily covered by concrete, asphalt surfaces, and gravel. DGSC is the source of major industry in the area. Land use in Chesterfield County in the vicinity of the DGSC is primarily single famil residential, intermixed with retail stores and light industry.

Areas of concern within the NGA include a former solvent degreasing area, severa formerly used and active underground and aboveground storage tanks, and an alleged water treatment sludge disposal area. Currently, the site is used for vehicle maintenance. Chemicals employed in this process include both chlorinate and nonchlorinated solvents.

Since 1942, the DGSC's mission has been the managing and furnishing of military general supplies to the Armed Forces and several federal civilian agencies. Today DGSC manages more than 300,000 general supply items at a facility encompassing 640 acres. The DGSC has more than 16 million square feet of covere storage space in 27 large brick warehouses and a million square feet of office space.

Past industrial operations at the DGSC have included parachute manufacture and repair, mess kit and canteen repair, refrigerator repair, materials handling, equipment overhaul, and engine rebuilding. Current industrial operations includ the refurbishing of steel combat helmets and compressed gas cylinders, and tent and fabric repair.

Operable Unit 3 consists of soils in the NGA. Soils of this site are mostly covered by concrete, asphalt, and gravel. Previous activities that have occurre in this area include the use of both underground and aboveground storage tanks for the storage of fuels, oils, and solvents. Some waste solvents were reportedly disposed of in the site's storm sewer, or on an unpaved area on the site. Waste liquids from the NGA have also been used for dust suppression on local roads. The former operation of a portable sandblasting shed in the vicinity of the alleged sludge disposal area has also been reported.

The primary current activities that occur at the NGA are vehicle maintenance operations, using both chlorinated and nonchlorinated solvents for degreasing purposes. Vehicle maintenance operations occur five days a week and support approximately 50 percent of Virginia's National Guard. All currently generated waste oils and solvents are disposed of through a private contract. Effluents from vehicle washracks are discharged to the sanitary sewer system.

Sampling events conducted at the site revealed the presence of certain metals, various polynuclear aromatic hydrocarbons (PAHs), and some volatile organic compounds (VOCs). The upper aquifer is primarily contaminated with VOCs and SVOCs. These contaminants were also detected in the lower aquifer. Aquifer contamination at NGA is addressed by this document only to the extent that it is impacted by soil contamination; groundwater contamination at this site is a component of OUs 6 and 9 in separate RODs.
Remedy:  The selected remedial action for this site requires that institutional controls, including access restriction, property transfer restriction, and preconstruction assessment, be implemented or continued at the site. Also, contaminated soils posing human health risks will be excavated and disposed of.

The main components of the selected remedy are as follows: maintenance of existing fencing and continued use of existing security measures at the facility and NGA site; implementation of existing deed restrictions and property transfer continued implementation of existing preconstruction assessment procedures to characterize military construction projects at the site, and policies which cove routine maintenance or utility excavations at the DGSC facility; maintenance of existing pavement within the NGA; performance of a follow-up chemical and biological monitoring program for No-Name Creek until all area remedial actions are complete; and a five year review to ensure that the chosen remedy continues to provide adequate protection of human health and the environment.

The excavation and off-site disposal portion of this remedy includes the following elements: excavation of an area of organically contaminated soil withi the alleged former water treatment disposal area containing the highest levels o carcinogenic-related constituents; sampling and analysis of soils at the excavation limits and comparison to risk-based soil action levels for organic constituents or detectable levels to confirm that contaminated soils have been removed; proper storage and testing of the excavated soil to classify the soil material for off-site disposal in accordance with Resource Conservation and Recovery Act (RCRA) land disposal requirements; transport and disposal of the contaminated soils to a landfill permitted to accept the waste; and backfilling and regrading the excavation using clean borrow material.
Text:  View full-text ROD [ 74K ]
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