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Condor Earth Technologies, Inc. <br /> 21663 Brian Lane Sonora CA 95370 (209) 532-0361 <br /> 188 Frank West Circle Suite I Stockton CA 95206(209) 234-0518 <br /> June 24, 2004 Condor Project No. 1707 <br /> SECOND QUARTER GROUNDWATER MONITORING <br /> AND SOIL VAPOR EXTRACTION SYSTEM STATUS <br /> JUL 12 2004 <br /> Site Address: Canepa's Car Wash ENVIRQNM <br /> 6230 Pacific Avenue PURMIT SF r H1=ACTH <br /> I <br /> Stockton, California RVICFS <br /> Client: Mr. Remo Canepa <br /> 1536 N. Hunter Street <br /> Stockton, California <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 (CRWQCB) <br /> This is a report of the results of the second quarter 2004 groundwater monitoring event conducted May 7, <br /> 2004 at the above-referenced site. Figures indicating the site location, groundwater elevation contours, <br /> groundwater elevation fluctuations (hydrograph), benzene iso-concentration contours, MTBE iso- <br /> concentration contours, and historical MTBE concentrations in MW-3 are attached to this report <br /> (Attachment A, Figures 1, 2, 3, 4, 5, and 6, respectively). Site background information, historical <br /> groundwater monitoring data, field forms, and laboratory analytical results are provided in Attachments <br /> B, C, D, and E, respectively. This report has been submitted to the SJCEHD and the CRWQCB as <br /> indicated above. <br /> In a letter dated February 4, 2003, Mr. Jeff Wong of the SJCEHD approved Condor's proposal to reduce <br /> quarterly sampling of MW-5, MW-6, MW-7, and MW-10 to an annual basis, and the destruction of MW- <br /> 8 to accommodate site development. It is anticipated that installation of a new monitor well in the vicinity <br /> of MW-8 and an additional down-gradient well will be conducted following development of the property. <br /> Wells MW-5, MW-6, MW-7, and MW-10 are currently monitored by Condor during third quarter <br /> monitoring events and were not sampled during the May 2004 event. A summary of the results of the <br /> second quarter 2004 groundwater monitoring is provided in Table 1, on the following page. <br /> i <br /> 4 <br /> 1� CONDOR <br />