NWS YORKTOWN - CHEATHAM ANNEX
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The 1,579-acre Naval Weapons Station (NWS) Yorktown – Cheatham Annex (CAX) site is located in Yorktown, Virginia. CAX was commissioned in 1943 as a satellite unit of the Naval Supply Depot to provide bulk storage facilities and serve as an assembly and overseas shipping point during World War II. Prior to Navy ownership and activity, CAX was the location of an explosives manufacturing facility operated by the DuPont de Nemours Company. Historical operations contaminated soil, groundwater, surface water and sediment with hazardous and explosive chemicals. Cleanup is complete at several sites. Investigations at remaining sites are ongoing.
What Is Being Done to Clean Up the Site?
The site is being addressed through federal actions.
EPA signed Records of Decision (RODs) selecting remedies for Site 1, Landfill Near Incinerator, and Site 11, Bone Yard. In addition, no further remedial action plans (NFRAPs) have been signed for Site 2, Site 3, Site 5, Site 6, Site 8, Site 10 and Site 12.
Site 1, Landfill Near Incinerator: The long-term remedy, selected in a 2009 ROD, was no further action. A prior removal action adequately addressed contamination. A time-critical removal action between December 1999 and May 2000 removed debris, stabilized the toe of the landfill cover slope in an eroded area, and installed upstream and downstream revetments to minimize erosion.
Site 11, Bone Yard: The long-term remedy, selected in a 2010 ROD, was no further action. Prior removal actions adequately addressed contamination. Removal actions in 1987, 1997 and 2009 removed drums, tanks, surface debris and nearly 2,900 cubic yards of contaminated soil from the site.
What Is the Current Site Status?
A March 2005 Federal Facilities Agreement (FFA) between EPA, the Virginia Department of Environmental Quality and the Navy identified 12 sites and eight areas of concern (AOCs) for investigation and possible cleanup. The FFA provided the framework and a schedule to accomplish this work (AOCs 4 and 5 were later determined to be part of Sites 4 and 1, respectively). Currently, there are 18 sites being addressed under the Superfund program.
The following areas are currently in the site investigation stage:
Site 4, Outdated Medical Supply Area
Site 7, Old DuPont Disposal Area
Site 9, Transformer Storage Area
AOC 1, Scrap Metal Dump
AOC 2, Dextrose Dump
AOC 3, CAD 11/12 Pond Bank
AOC 6, Penniman AOC
AOC 7, Drum and Can Disposal Area
AOC 8, Area South of Site 7