Case study – BTEX contamination - Kentucky

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Courtesy of Remediation Products Incorporated (RPI)

In 1992, remedial activities began at the Shively Service Center located in Radcliff, Kentucky. After the leaking underground storage tanks were removed from the site approximately 1,500 cubic yards of BTEX impacted soil was excavated and disposed off-site from the tank pits. Based on the review of historical sampling activities it was believed that the majority of the impacted soils were removed at that time. The soils at the site consist of highly impermeable clays with interbedded chert lenses.

The initial approach for remediation of the impacted groundwater at the site was the installation of a groundwater pump and treat system. The pump and treat system included a 300 foot long extraction trench, two collection sumps, and groundwater recovery pumps. This extraction system operated until the late 1990's. Based on the results from the June 2001 groundwater sampling, it can be concluded that the pump and treat system had minimal effect on cleanup of the groundwater at the site. A total of approximately $730,000 had been spent on remedial efforts through the end of 2000.

In 2001, the Owner entered into a Pay for Performance (PFP) contract with the State of Kentucky Office of Petroleum Storage Tank Environmental Assurance Fund to complete the remedial efforts at the Shively site for approximately $270,000. The first activity conducted under the PFP was 8-quarterly mobile multiphase extraction events. The multiphase extraction events provided minimal reductions In BTEX concentrations in the groundwater at the site. Two pilot test injections using hydrogen peroxide and ORC® separately at different locations were also implemented with similar results (minimal reductions in BTEX concentrations).

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