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Installation Restoration Program. Remedial Investigation/Feasibility Study, Galena Airport, Alaska. Treatability Study Report.

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Final rept.

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The USAF contracted Radian Corporation to perform treatability studies to evaluate soil vacuum extraction SVE and biodegradation technologies for remediating soils contaminated with motor and jet fuel at the Petroleum, Oils, and Lubricants POL Tank Farm, Galena Airport, Alaska. This technical report describes the experimental methods and interprets the analytical and operational results from the bench-scale biotreatment tests and pilot-scale SVE tests conducted between July 1992 and February 1994. An initial pilot test conducted at the Galena Airport POL site during July to September 1992 demonstrated the effectiveness of SVE for removing volatile organic compounds VOCs. Beginning in August 1993, a second pilot SVE test was conducted for a six-month operational period. This pilot test design included two study areas, each equipped with a central vapor extraction well a series of air andor steam injection points and soil, soil gas, and groundwater monitoring points. Monitoring results show that average VOC removal rates by the twin SVE systems ranged between 50 to 380 kgday. In situ biodegradation rates up to 8 mgkgday were also measured in the vadose-zone soils during the second pilot test. Similar biodegradation rates were observed in bench-scale tests. The increase in biological activity is attributed to the higher subsurface oxygen levels induced by SVE operation.

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  • Environmental Health and Safety
  • Water Pollution and Control

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