Development of a Facility-Specific Risk Assessment Approach: A Case Study at England AFB, LA. M. L. Martinez, U.S. Environmental Protection Agency, Region 6, 1445 Ross Ave., Dallas, TX 75202; T. F. Harris, Louisiana Department of Environmental Quality, Office of Solid and Hazardous Waste, 7290 Bluebonnet, 5th Floor, P.O. Box 82178, Baton Rouge, LA 70884; and A. Rak, Air Force Center for Environmental Excellence, Consultant Operations Division, 3207 North Rd., Brooks AFB, TX 78235
England AFB is a closed military installation undergoing expedited corrective action under the Presidential initiative of Base Realignment and Closure (BRAC). The facility has more than 200 units that must be addressed with the ultimate goal of property transfer for public reuse. The England AFB BRAC Team which is comprised of representatives from the U.S. Air Force, the Louisiana Department of Environmental Quality, and the U.S. Environmental Protection Agency has developed a facility-specific approach to effectively and expeditiously deal with risk-based corrective actions and risk management decisions at England AFB. The approach encompasses the risk assessment process from the screening assessment to the baseline risk assessment. The process includes specific procedures for identifying applicable screening levels and regulatory standards for the human health risk assessment screen. The approach also identifies the relevant exposure pathways, exposure routes, and facility-specific exposure parameters for the human health baseline risk assessment. The specific uses of background values within the screening assessment and baseline risk assessment are also described within the approach, as is the decision logic to sequentially screen sites for no further action. The approach is both streamlined and protective in addressing facility environmental concerns and incorporates the U.S. Environmental Protection Agency’s risk assessment guidance, and both federal and state regulatory requirements.