Remedial Action Plan for Expanded Bioventing System at Site FC-2 Kelly AFB, Texas
Abstract
This remedial action plan presents the scope for an expanded bioventing system for in situ treatment of fuel-contaminated soils at a former fire control training area referred to as Site FC-2 at Kelly Air Force Base (AFB) Texas. The proposed expanded system activities 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 system upgrade are: (1) To deliver oxygen to contaminated subsurface soil throughout the site; (2) To provide additional characterization data for closure in accordance with Texas risk reduction rules; (3) To continue aerobic in situ remediation of fuel-contaminated soils by injection of atmospheric air into soil; and (4) To sustain aerobic in situ biodegradation until hydrocarbon- contaminated soils within the unsaturated zone are remediated to below regulatory approved standards. A one-year bioventing pilot test was performed at this site from December 1992 to January 1994 to determine if in situ bioventing would be a feasible cleanup technology for the fuel-contaminated soils within the unsaturated zone in the source area. A radius of oxygen influence of at least 35 feet was observed at 4, 9, and 13.5-foot depths, at an average flow rate of 48 cubic feet per minute (cfm) during the initial pilot test. Based on 6- and 12-month testing results. the actual radius of oxygen influence was estimated to be 50 feet. Further detail on the pilot test procedure and results can be found in the Interim Pilot Test Results Report (Parsons ES, 1993). Following the one-year pilot test, soil and soil gas data confirmed significant contaminant removal in the entire pilot test area.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1996
- Accession Number
- ADA384311
Entities
Organizations
- Parsons Corporation