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INFORMATION SHEET <br /> ORDER NO. R5-2003-XXXX <br /> CONTIGROUP COMPANIES <br /> FRENCH CAMP GRAIN ELEVATOR <br /> ENHANCED BIOREMEDIATION PILOT STUDY <br /> SAN JOAQUIN COUNTY <br /> ContiGroup Companies formerly owned the active grain storage and transfer facility at <br /> 9504 South Harlan Road in French Camp. Historically, liquid fumigants containing <br /> carbon tetrachloride were stored on site in five gallon buckets. Carbon tetrachloride <br /> polluted groundwater was found in 1999. Several investigations have been conducted to <br /> delineate the extent of carbon tetrachloride and its breakdown product, chloroform. <br /> Three water bearing zones are identified at the site with most of the mass of pollution in <br /> the B water bearing zone. The B water bearing zone is about 60 to 70 feet below ground <br /> surface and varies from about 5 to 10 feet thick across the site. <br /> The enhanced bioremediation pilot study proposed is the injection of the proprietary <br /> polylactate compound, Hydrogen Releasing Compound (HRC®). The purpose of the <br /> pilot study is to evaluate HRC® as a remedial alternative and to determine the necessary <br /> spacing and dosage for full-scale HRC® injections. The pollutants at the site are <br /> undergoing reductive dechlorination under anaerobic conditions. Under anaerobic <br /> conditions, carbon tetrachloride and its breakdown product chloroform are degraded by <br /> indigenous microorganisms to carbon dioxide and water. The remedial process depends <br /> upon stimulating growth of the indigenous microorganisms by providing a carbon <br /> substrate in the form of HRC®. <br /> DLL 8/13/03 <br />