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4 <br /> r {{ tr r }• , �•I4�Ir��1 <br /> } Sondor Earth Technologies, Inc. <br /> 03 APP 23 PSI 1= 21663 Brian Lane Sonora CA 95370(209)532-0361 <br /> 188 Frank West Circle Suite I Stockton CA 95206(209)234-0518 <br /> April 3, 2003 Condor Project No. 3761 <br /> FIRST QUARTER GROUNDWATER MONITORING REPORT, MARCH 2003 <br /> Site Address: Boyett Petroleum <br /> 419 S. Main Street <br /> Manteca, California <br /> Client: Mr. Dale Boyett <br /> Boyett Petroleum <br /> P.O. Box 576277 <br /> Modesto, CA 95357 <br /> Primary Agency: Jeff Wong, San Joaquin County Environmental Health Department(SJCEHD) <br /> Copy to: James Barton, California Regional Water Quality Control Board, Central Valley <br /> Region(CRW QCB) <br /> This is a report of the results of the first quarter 2003 groundwater monitoring event conducted on March <br /> 21, 2003, at the above-referenced site. Figures indicating the vicinity and site maps, groundwater <br /> elevation contours, groundwater gradients, MTBE isoconcentration contours, MTBE concentration(MW- <br /> 1 and MW-7) over time, MTBE and groundwater elevation versus time in MW-1 and MW-7, and <br /> proposed direct push boring locations (Figures 1, 2, 3, 49 5, 6, 7, and 8, respectively) are attached to this <br /> report. Site background information, historical groundwater monitoring data, field forms, and laboratory <br /> analytical results are also attached. This report has been submitted to the SJCEHD and the CRWQCB as <br /> indicated above. A summary of the results of the first quarter 2003 groundwater monitoring event is <br /> provided in Table 1, on the next page. <br /> i1� CONDOR <br />