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Title: In-well air stripping/bioventing study at Tyndall Air Force Base, Florida. Final technical report, 13 September 1991-30 November 1995

This study was conducted to determine the feasibility of incorporating in-well air stripping systems into the design of bioventing systems to effectively extend bioventing to simultaneously remediate hydrocarbon contamination in both the vadose and saturated zones. The field study was conducted for 12 months between June 1994 and June 1995. The data demonstrated that the in-well air stripping systems were able to circulate the groundwater throughout the 25-foot radius of influence. The well systems were shown to be effective at remediating the benzene, toluene, ethylbenzene, and xylenes (BTEX) of the hydrocarbon contamination in the groundwater within the treatment cell. Conclusions made included: (1) the air lift pumping mechanism was capable of circulating groundwater in the aquifer; (2) the volatile compounds were effectively stripped from the groundwater; (3) anoxic groundwater entering the well was sufficiently oxygenated during air lift; (4) the residual oxygen in the off-gas from the in-well air stripping system was sufficient for supporting bioventing in the vadose zone; (5) volatile compounds in the off-gas from the well system were degraded in the vadose zone through bioventing when the mass loading did not exceed the degradative capacity of the microorganisms; and (6) bioventing was very effective for remediating residualmore » hydrocarbon contamination in the vadose zone.« less
Authors:
Publication Date:
OSTI Identifier:
449191
Report Number(s):
AD-A--317134/5/XAB
CNN: Contract F08635-95-C-0064; TRN: 70590009
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 3 Jan 1996
Research Org:
Battelle Columbus Operations, OH (United States)
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; DECONTAMINATION; HYDROCARBONS; BIODEGRADATION; REMEDIAL ACTION; AIR-WATER INTERACTIONS; PROGRESS REPORT