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J U L 2 7 2004 <br /> ENVIRONMENT HEALTH <br /> Condor Earth Technologies zinc. <br /> 21663 Brian Lane Sonora CA 95370(209) 532-0361 <br /> 188 Frank West Circle Suite I Stockton CA 95206(209)234-0518 <br /> July 23, 2004 Condor Project No. 3761A <br />' SECOND QUARTER 2004 GROUNDWATER MONITORING REPORT <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: Jeffrey Wong, San Joaquin County Environmental Health Department (SJCEHD) <br /> Copy to: James Barton, California Regional Water Quality Control Board, Central Valley <br /> Region (CRWQCB) <br />' Y This second quarter 2004 groundwater monitoring report includes a description of groundwater <br /> monitoring conducted by Condor Earth Technologies, Inc. (Condor) at the above referenced site (Figure <br /> 1, attached) on June 24, 2004. This report has been submitted to the SJCE14D and the CRWQCB as <br /> indicated above. The following are shown in Figures 1 through 5, which are attached to this report: <br />' • site location <br /> • site map <br /> • groundwater elevation contours and gradient <br />' • historical groundwater gradients <br /> 0 shallow monitor well methyl tertiary-butyl ether(MTBE) isoconcentration contours <br /> Also attached are the following: <br />' • site background information <br /> • historical groundwater monitoring data <br />' • groundwater monitoring field forms <br /> • laboratory analytical results <br /> FIELD OBSERVATIONS <br /> On June 24, 2004, a Condor representative was on site to measure water levels and collect groundwater <br /> .CRmr)lPC from monitor wells MW-7 MW_l MW-4R AiTW-o7 A417U_1 1 .,.,� 1~'ZdT_1 Tt,A 1.,...,+;ons <br /> of the monitor wells are shown in Figure 2, attached. Field observations included water level <br /> measurement, appearance of samples (color, clarity, and presence of petroleum product sheen or phase in <br /> CI? CONDOR <br />