Part I: Bioventing Pilot Test Work Plan for Site S-4 and Site FC-2 Kelly AFB, Texas. Part II: Draft Interim Pilot Test Results Report for Site S-4 and Site FC-2 Kelly AFB, Texas

摘要

The Air Force Center for Environmental Excellence (AFCEE) one-year bioventing test and evaluation projects at Site FC-2 and Site S-4 have been completed. For each site, Figure 1 provides general site information and Table 1 provides a summary of initial, six-month, and one-year fuel biodegradation rates measured at several monitoring points. Biodegradation rates have gradually decreased over the one-year pilot tests. These decreases are best explained by the reduction of contaminant levels as the bioventing continued. Table 2 provides a summary of initial and final soil and soil gas sampling results for total recoverable petroleum hydrocarbons (TRPH) and benzene, toluene, ethyl benzene, and xylenes (BTEX). Based on results from your sites and 108 other sites currently under operation, bioventing is cost-effectively remediating fuel contamination in a reasonable time frame. We recommend its application throughout FC-2, S-4, and at other sites on your installation using the criteria in the AFCEE Test Plan and Technical Protocol for a Field Treatability Test for Bioventing, May 1992, including Addendum One, February 1994.