High Benzene Concentrations Reduced Using ORC Advanced

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Courtesy of REGENESIS

Site Summary

Elevated levels of petroleum hydrocarbons were discovered near the former dispenser island at a former service
station in Sheboygan, WI. In hopes of reducing concentrations, soil excavation activities took place in June 2003. A
total of 500 tons of hydrocarbon-impacted soils were removed and transported to a landfill for disposal. However,
residual contamination continued to affect the groundwater after the excavation. By March 2004, benzene and
ethylbenzene had risen to 2,500 ug/L and 1,300 ug/L, respectively. In situ bioremediation using ORC Advanced was
chosen to reduce BTEX, naphthalene, and trimethylbenzenes. In the northwest corner of the site, the location of the
former UST basin, a total of 480 pounds of ORC Advanced was injected. In the southeast corner, the area of highest
contamination, a total of 2,370 pounds of ORC Advanced was injected.

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