In situ bioventing: Results of three pilot tests performed in Hawaii
- Parsons Engineering Science, Inc., Denver, CO (United States)
- Parsons Engineering Science, Inc., Honolulu, HI (United States)
- Air Force, Hickman AFB, HI (United States)
Three pilot-scale bioventing tests were performed to examine the potential for petroleum hydrocarbon biodegradation in volcanic and marine soils between 1.4 and 50 m below ground surface (bgs) on the island of Oahu, Hawaii. Aerobic petroleum hydrocarbon biodegradation was shown to be occurring at all three sites by comparing oxygen and carbon dioxide concentrations in soil gas from unimpacted zones. In situ respiration testing demonstrated that petroleum hydrocarbons could be biodegraded at estimated rates ranging from 110 to 5,000 mg of fuel per kg of soil per y. Formation permeability testing demonstrated that oxygen could be uniformly delivered through a variety of lithologic types, including saprolite and volcanic tuff. Radii of influence for these single-well systems ranged from 8 to 12 m. The pilot-scale systems installed at each site were operated continuously for a 12-month extended testing phase to determine the long-term influences of bioventing. Order-of-magnitude decreases in soil and soil gas concentrations of benzene, toluene, ethylbenzene, and xylenes (BTEX) were documented over the extended testing phase, indicating that bioventing is a suitable technology for full-scale remediation of petroleum in soils at these sites.
- OSTI ID:
- 467757
- Report Number(s):
- CONF-950483--; ISBN 1-57477-003-9
- Country of Publication:
- United States
- Language:
- English
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