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SHORE TERMINAL SERVICES, STOCKTON TERMINAL#29,ENHANCED <br /> BIOREMEDIATION PILOT STUDY, SAN JOAQUIN COUNTY <br /> Shore Terminal Services (Discharger) owns the bulk fuel terminal at 2941 Navy Drive in Stockton. <br /> Three other bulk fuel terminal companies operate on the same parcel. Two documented releases of <br /> petroleum hydrocarbons in 2002 have resulted in petroleum hydrocarbon pollution in the A <br /> groundwater bearing zone, which is from about 5 to 20 feet below ground surface. Groundwater <br /> contains total petroleum hydrocarbons (TPH) as gasoline up to 150,000 micrograms per liter(4g/1), <br /> TPH as diesel up to 9,400 4g/l,benzene up to 45,000 4g/1, toluene up to 55,000 4g/1, ethylbenzene <br /> up to 23,000 4g/1, xylenes up to 130,000 µg/1, and methyl tertiary butyl ether up to 280,000 4g/1. <br /> The Discharger proposes to install and operate an enzyme-catalyzed dissolved oxygen in situ treatment <br /> system for six months as a pilot study. The proposed system will extract groundwater from two <br /> extraction wells screened in the A water bearing zone downgradient of the treatment area and piped it to <br /> a 300-gallon storage tank at the upgradient end of the treatment area. The Discharger will add a <br /> bacterial consortium, enzyme enhancements, and specialized nutrients to the 300-gallon storage tank. <br /> Amended groundwater will then be re-injected back into the A water bearing zone upgradient of the <br /> treatment area via the Super Ox TM unit. Extracting groundwater at the downgradient end of the <br /> treatment area along with the natural groundwater flow direction will pull the amended groundwater <br /> through the treatment area. The WDR requires extensive monitoring to evaluate the effects of the <br /> proposed injection. <br /> DLL <br /> 9/22/03 <br />