Combined Co-Solvent Soil Flushing and In Situ Bioremediation at a Former Industrial Waste Disposal Site
This 30-acre site was the former location of a disposal area burn pit where a wide variety of liquid and solid wastes generated from a nearby manufacturing facility were disposed and periodically burned off. A site investigation began in 1984 under an order issued by the Tennessee Department of Environment and Conservation (TDEC). Primary contaminants of concern at the site include halogenated solvents such as trichloroethylene (TCE), 1,1,1-TCA, and Freon 113. The TDEC issued a Record of Decision (ROD) in 1996 that specified multiple remedies, including soil vapor extraction (SVE), focused excavation, and soil flushing for soils in the burn pit area. The monitoring data collected after a SVE system had been in operation for five years suggested asymptotic performance. The client retained Geosyntec to design and implement a soil flushing pilot test for a comprehensive approach integrating the soil flushing remedy with the site's groundwater remediation program.
