Fuel Services Company

“The risk assessment was subsequently approved and the project is on track for an expedited closure at a cost approximately 30-percent less than a traditional system-based remediation.”

The Site was a former retail fuel facility that occupied a parcel of land adjacent to a popular fishing stream. A fisherman reported a sheen on the stream that originated from the former retail fuel facility property.

GEC installed a multi-phase extraction system as an interim remedial measure to remove LNAPL and provide hydraulic control of the groundwater to eliminate the sheen on the adjacent stream. The system recovered approximately 715 gallons of LNAPL, treated over 18 million gallons of groundwater and 92 million cubic feet of vapors during the two-year operational period.

An efficiency study was conducted during the interim remedial action to determine the future effectiveness of the multi-phase extraction system. It was determined that hydrocarbon recovery had stabilized and alternative remedial technologies should be evaluated to achieve site closure. The client requested that the remedial approach consist of an innovative solution to avoid costly, ongoing, extensive investigation and treatment activities that are typical of traditional system-based remediation.

A revised Remedial Action Plan was developed and included a risk assessment to address residual LNAPL, dissolved-phase hydrocarbons and hydrocarbons in soil. The risk assessment developed site-specific standards that were protective of all potential on-site and off-site receptors and the adjacent stream. The risk assessment was subsequently approved and the project is on track for an expedited closure at a cost approximately 30-percent less than a traditional system-based remediation.