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ST,<�E O�C r RNiq GEORGE DEUKMEJIAN,Go,e,,o, <br /> _E.A_ <br /> CALIFORNIA REGIONAL WATE JALITY CONTROL BOARD-- <br /> CENTRAL- <br /> OARD—CENTRAL 'VALLEY REGION <br /> 3443 ROLITIER ROAD <br /> SACRAMENTO,CA 95827-3098 <br /> c . a <br /> 1 September 1988 <br /> CNFER-,,AIf SERVCESTH <br /> Mr. Charles Nichols <br /> USA Petroleum Corporation <br /> P.O. Box 1839 <br /> Santa Monica, CA 90406 <br /> GROUND :TATER CONTAMINATION AT USA FUEL STATIONS, SAN JOAQUIN <br /> COUNTY <br /> Our files indicate that the following USA stations have ground <br /> water contamination: <br /> 1) USA station #05, 2500 West Lodi Avenue, Lodi <br /> 2) USA Station #110, 2132 East Mariposa Road, Stockton <br /> Reports submitted in October 1987 by your consultant, Applied <br /> GeoSystems, demonstrate that petroleum hydrocarbons have leaked <br /> into the environment from your storage or distribution systems. <br /> Our concerns are that the extent of contamination has not been <br /> determined at these sites and the lack of activity by USA <br /> Petroleum to complete the work. Following are our reviews of the <br /> reports and additional investigations necessary at each site: <br /> 1) USA Station #65 <br /> The "Delineation of Hydrocarbon contamination and <br /> Hydrogeologic Characterization" report prepared by <br /> Applied GeoSystems (13 October 1987) with excerpts <br /> of a Pacific Environmental Group report, indicates <br /> that contaminated ground water exists beneath the <br /> product storage area and extends south at least <br /> 120 feet (MW-3) . The lack of any additional <br /> monitoring wells in the indicated ground water <br /> flow direction (S400E) makes it impossible to <br /> determine the actual extent of contamination at <br /> this time. To further define the extent of <br />