Interim Measures Work Plan Expanded Bioventing System SWMU 55 (IRP Site FT-03)

摘要

This interim measures work plan (IMWP) presents the scope for an expanded bioventing system to conduct in situ treatment of the remaining fuel- contaminated soils at solid waste management unit (SWMU) 55, also known as Installation Restoration Program (IRP) Site FTO3 (former Fire Protection Training Area No. 3), Charleston Air Force Base (AFB), South Carolina. Hereafter in this IMWP document, SWMU 55 will be referenced as Site FT-03. A one-year bioventing pilot study previously conducted at this site had successful results in reducing fuel hydrocarbons in soils. Activities associated with the proposed system expansion will be performed by Parsons Engineering Science, Inc. (Parsons ES) for the Air Force Center for Environmental Excellence (AFCEE) Technology Transfer Division (ERT) under contract F41624-92-D-8036, 0017. The primary objectives of the bioventing system upgrade are to: (1) Deliver oxygen to additional areas of the site that have subsurface soils contaminated with fuel hydrocarbons that did not receive treatment during the one-year pilot study; (2) Provide additional characterization data that can be used for site closure; (3) Continue in situ remediation of fuel-contaminated soils by injecting atmospheric air into the soils to promote aerobic fuel biodegradation processes; and (4) Sustain in situ aerobic fuel biodegradation until hydrocarbon-contaminated soils within the unsaturated zone are remediated to below regulatory-approved standards.