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f 1386 EAST BEAMER STREET <br /> WV F ES TERN WOODLAND, CA 95695-9603 <br /> GEO-ENGINEERS FAX (916)662-0273 <br /> CALIF CONTRACTOR#513857 A CORPORATION <br /> (916) 668-5300 <br /> REGISTERED GEOLOGISTS <br /> Mr, Charles Buril September 24 , 1991 <br /> 4 USA PETROLEUM CORPORATION <br /> 1261 East 9th Street, <br /> Pomona, CA 90406 <br /> (714 ) 622-3424 FAX (714) 622-1002 <br /> RE: Quarterly Monitoring Report USA Petroleum Corporation Station <br /> #65, 2500 West Lodi Avenue, Lodi, California. <br /> INTRODUCTION <br /> Purpose and Scope <br /> To satisfy the quarterly monitoring requirements and to document <br /> the investigation of groundwater sampling for USA Petroleum <br /> Station #65, the following report is submitted by Western Geo- <br /> Engineers (WEGE) . <br /> On September 10 , 1991 , WEGE personnel sampled the monitor .wells at <br /> USA Petroleum Corporation Station #65 . <br /> During the monitoring round, water samples were collected from <br /> MWl , MW2 , MW3 , MW5 , MW6, and MW7 for analyses by a state-certified <br /> ..� laboratory. Monitor Wells S1 and S2 were dry at the time of <br /> sampling. he traffic box of MW4 was recently paved ov, by the <br /> conte p �-The <br /> asphalt on the adjacent parking lobar the <br /> shopping center, No water sample was collected from well MW-4 <br /> (see Table 1 and Figure 4 ) . <br /> Location <br /> USA Petroleum Corporation Station 65 is located at 2500 West Lodi <br /> Avenue in Lodi, California. The property is an active gasoline <br /> station that retails unleaded, leaded and premium unleaded <br /> gasoline. This site is in Section 10 , T3S , R6E, MDB&M, San <br /> Joaquin County, California. The site elevation is approximately <br /> 37 feet above mean sea level (see Figures 1 and 2) . <br /> Background <br /> The site consists of three 12 ,000 gallon steel underground storage <br /> tanks . The tanks store regular, unleaded and premium unleaded <br /> gasoline. USA records indicate no significant loss or gain in the <br /> inventory. The site has three service islands, each with a vapor <br /> recovery system. <br /> 1 <br />