Replacement of P&T with ORC Advanced Reduces Cost to Closure

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Courtesy of REGENESIS

Site Summary

Two leaking USTs resulted in soil and groundwater contamination at a service station in Michigan. Naphthalene, trimethylbenzene (TMB) and BTEX contamination were discovered in the subsurface prompting the need for remedial cleanup. Michigan DEQ began remediation via UST removal and soil excavation. A total of 4,000 cubic yards of contaminated soil was removed. A pump and treat (P&T) system was installed and operated through December 2003. The system removed 1,575 pounds of BTEX and significantly lowered contaminant concentrations but was reaching asymptotic conditions. Regulators began looking into new ways of accelerating the remediation process and reducing the overall cost of cleanup. Enhanced aerobic bioremediation using ORC Advanced was deployed to replace the P&T system and degrade the remaining contamination. The remedial design included two applications of 43 injection points.

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