Record of Decision System (RODS)
NAVAL WEAPONS STATION - YORKTOWN
|Site Name:||NAVAL WEAPONS STATION - YORKTOWN|
|Address:||US NAVAL WEAPONS STA|
|City & State:||YORKTOWN VA 23690|
|NPL Status:||Currently on the Final NPL|
|ROD Type:||Record of Decision|
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 10,624-acre Naval Weapons Station is located on the Yorktown Peninsula in Newport News, Virginia (WPNSTA Yorktown). The installation is bounded on the northwest by the Naval Supply Center Cheatham Annex, the Virginia Emergency Fuel Farm and the future community of Wittaker's Mill; on the northeast by the York River and the Colonial National Historic Parkway; on the southwest by Route 143 and Interstate 64; and on the southeast by Route 238 and the community of Lackey. The Record of Decision addresses OU I, Site 5, Surplus Transformer Storage Area, which is located near Barracks Road in the northeastern portion of the facility adjacent to the south end of Building 76. Building 76 was constructed in 1922 and has housed a standby electrical generator since its completion. Use of the property at OU I before Building 76 was constructed is unknown. The OU I is approximately 1,000 square feet in size and is fenced and covered with gravel. OU I was used to store surplus polychlorinated biphenyl (PCB)-containing electrical transformers from 1940 to 1981. After 1981, only non-leaking transformers were stored at this location. Currently, no transformers are stored at the site.
A soil removal action was conducted by the Naval Weapons Station at OU 1 in 1982. The results of the action and the volume of soil removed were not documented. Over time an estimated 300 pounds of PCB-containing fluid leaked from transformers stored at OU 1. No state or federal involvement with the removal action or any other action at OU 1 has been documented.
An Initial Assessment Study (IAS) was conducted at WPNSTA in 1984. A Round One Confirmation Study Report was completed in 1986. An RI Interim Report summarizing the two previous studies was completed in 1991. Additional investigations were conducted at WPNSTA in 1992. The investigations indicate that the removal action was effective in reducing soil PCB concentrations to levels at or below the TSCA definition of "clean soils" (i.e., containing less than 1,000 ug/kg total PCBs) for nonrestricted access areas. No further action is required for OU 1.
The proposed remedial action identified in this plan for OU I is the No Action Alternative. A soil removal action was conducted by the Naval Weapons Station at OU I in 1982, however, the results of the action and the volume of soil removed were not documented. Subsequent investigations indicate that the removal action was effective in reducing soil PCB concentrations to levels at or below the TSCA definition of "clean soils" (i.e., containing less than 1,000 ug/kg total PCBs) for nonrestricted access areas. Furthermore, deeper subsurface soils and shallow groundwater have not been affected by contamination associated with past activities at OU I.
|Remedy:||The proposed remedial action identified in this plan for OU I is the No Action Alternative.|
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