National Oil and Hazardous Substances Pollution Contingency Plan; National Priorities List: Partial Deletion of the Ellsworth Air Force Base Superfund Site

The Environmental Protection Agency (EPA) Region 8 announces the deletion of Operable Unit (OU) 1--the former Fire Protection Training Area (FPTA), along with two other Areas of Concern (AOC): the Gateway Lake Ash Study Area and the Pride Hangar Study Area of the Ellsworth Air Force Base (AFB) from the National Priorities List (NPL). The NPL, promulgated pursuant to section 105 of the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) of 1980, as amended, is an appendix of the National Oil and Hazardous Substances Pollution Contingency Plan (NCP). This partial deletion pertains to the surface soil, unsaturated subsurface soil, surface water and sediments of Operable Unit (OU) 1, the Gateway Lake Ash Study Area, and the Pride Hangar Study Area. The groundwater medium associated with OU-11, Basewide Groundwater will remain on the NPL. The EPA and the State of South Dakota, through the Department of Environment and Natural Resources, have determined that all appropriate response actions under CERCLA, other than five-year reviews have been completed. However, the deletion of these parcels does not preclude future actions under Superfund.

Agency Contact: C. Mark Aguilar, Remedial Project Manager, U.S. Environmental Protection Agency, Region 8, 8EPR-F 1595 Wynkoop St., Denver, CO 80202, (303) 312-6251, email: aguilar.mark@epa.gov.