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The AAPG/Datapages Combined Publications Database

GCAGS Transactions

Abstract


Gulf Coast Association of Geological Societies Transactions
Vol. 45 (1995), Pages 541-546

Use of Combined Air Sparging with Soil Vacuum Extraction and Groundwater Recovery and Treatment as Remedial Alternatives for Dissolved Chlorinated Hydrocarbons Recovery

Raymond Sturdivant, Jr. (1), Gary A. Fulton, Jr. (1), Frank E. Bains (2)

ABSTRACT

Corrective action has been implemented to address a dissolved chlorinated hydrocarbons (CHCs) plume in the vicinity of a former basin at the Paxon Polymer Company facility located north of Baton Rouge, Louisiana. Assessment activities focused on the characterization of the geologic and hydrologic properties of the sediments underlying the area of investigation and the impact of the dissolved CHC plume to the soils and groundwater. Geologic characterization revealed that the facility is underlain by Quaternary age sediments consisting of mixtures of fine-grained sands, silt, and clay. Three hydrologic units were identified within the shallow sediments which are referred to as the Upper Permeable Zone, Second Permeable Zone, and Third Permeable Zone. The investigation focused on the impacted soils and groundwater of the Upper and Second Permeable Zones.

The Upper and Second Permeable Zones were characterized hydrologically to determine the most applicable remedial alternative for addressing the dissolved CHC plume. Pilot tests consisting of soil vacuum extraction (SVE), combined air sparging with SVE (AS/SVE), and groundwater recovery were performed. Evaluation of these remedial technology alternatives resulted in the selection of the combined AS/SVE system alternative for the Upper Permeable Zone and the groundwater recovery alternative for the Second Permeable Zone. Recovered off-gas from the combined AS/SVE treatment system from the Upper Permeable Zone is treated through use of a granular activated carbon unit, while recovered groundwater from the Second Permeable Zone is treated by use of a low-profile air stripper.


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