A comparison of pump and treat, soil vapor extraction and air sparging to treat mixed contaminants in an alluvial geologic setting
- Groundwater Technology, Inc., Trenton, NJ (United States)
This paper presents the results of remedial system operations at a site located in Pennsylvania. The site was contaminated with BTEX and TCE. Initial remedial system operations were a pump and treat system with soil vapor extraction. The follow-on system was a combined air sparge/soil vapor extraction remediation system. A sensitive issue at the site was the presence of an off-site chlorinated plume. The pump and treat/soil vapor extraction system operated for about a year. Because of the lack of performance and the on-site migration of chlorinated solvents, the pump and treat/soil vapor extraction system was terminated. Initially, only the vapor extraction (soil vent) system was operated to facilitate removal of adsorbed and vapor phase VOCs within the vadose zone prior to start-up of the air sparge system. Air sparging was initiated once the vent system had reached its maximum removal efficiency. During the first year of sparging operations, over 6,800 pounds of VOCs (primarily BTEX) and volatile TPH constituents contained within the vadose zone, capillary fringe and shallow water bearing zone had been effectively removed through operation of the combined remedial system. Overall dissolved phase chlorinated VOCs, BTEX, and TPH constituent concentrations in groundwater have been significantly reduced - approximately 71% for chlorinated VOCs, 96% for BTEX and 100% for TPH.
- OSTI ID:
- 49378
- Report Number(s):
- CONF-941189-; ISBN 1-56590-016-2; TRN: IM9523%%201
- Resource Relation:
- Conference: SUPERFUND XV: 15th environmental conference and exhibition for the hazardous materials/hazardous waste management industry, Washington, DC (United States), 29 Nov - 1 Dec 1994; Other Information: PBD: 1994; Related Information: Is Part Of Superfund XV conference proceedings. Volume 1; PB: 866 p.
- Country of Publication:
- United States
- Language:
- English
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