ORC Enhances Bioremediation and Results in No Further Action


Courtesy of Regenesis

Site Summary

A former industrial facility had one 1,000-gallon diesel UST for use in fueling an emergency generator.  Following removal of the UST, site investigations indicated diesel fuel contamination at levels above Florida Department of Environmental Protection (FDEP) Guidance Criteria. Further, total petroleum hydrocarbon (TPH) and polyaromatic hydrocarbon (PAH) contamination in groundwater had migrated underneath 2 buildings on the property. The average TPH concentration for the entire plume, before source removal, was estimated to be 2,540 μg/L, while PAHs averaged 49.54 μg/L. After reviewing multiple options for remediation, ORC injection, along with excavation of the immediate source area, was chosen as a cost-effective means of remediation given the low concentrations and the location of the plume. A grid was developed which included 36 direct-push injection points spaced at 10 ft intervals.

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