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<br /> 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 /> April 30, 2003 Condor Project No 1707
<br /> SECOND QUARTER GROUNDWATER MONITORING REPORT APRIL, 2003
<br /> AND SOIL VAPOR EXTRACTION SYSTEM STATUS UPDATE
<br /> 1
<br /> Site Address: Canepa's Car Wash
<br /> 6230 Pacific Avenue
<br /> Stockton, California
<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, 2003 groundwater monitoring event conducted on
<br /> April 17 and 18, 2003 at the above-referenced site Figures indicating the site location, groundwater
<br /> elevation contours, groundwater elevation fluctuations (hydrograph), benzene isoconcentration contours,
<br /> MTBE isoconcentration contours and MTBE concentration in MW-3 (Attachment A, Figures 1, 2, 3,4, 5,
<br /> and 6, respectively) are attached to this report Site background information, historical groundwater
<br /> monitoring data, field forms, and laboratory analytical results are provided in Attachment B, C, D, and E,
<br /> respectively This report has been submitted to the SJCEHD and the CRWQCB as indicated above
<br /> In a letter to Mr Jeff Wong of the SJCEHD dated October 2, 2002, Condor proposed annual monitoring
<br /> of site monitor wells MW-5, MW-6, and MW-7 (reduced from quarterly) and destruction of MW-8 and
<br /> MW-10 In a letter dated February 4, 2003, Mr Wong indicated that annual sampling of MW-5, MW-6,
<br /> and MW-7 and destruction of MW-8 were approved but that annual monitoring of MW-10 was necessary
<br /> Mr Wong also indicated that MW-8 would need to be replaced and an additional down-gradient monitor
<br /> well installed Condor subsequently prepared a work plan for the destruction of MW-8 dated February 5,
<br /> 2003, destroyed MW-8 under SJCEHD permit and supervision on April 11, 2003 and prepared a report of
<br /> the well destruction dated April 21, 2003 In accordance with SJCEHD requirements as described,
<br /> Condor did not sample MW-5, MW-6, MW-7, MW-8 (destroyed) and MW-10 as part of the second
<br /> quarter 2003 groundwater monitoring event These wells will be sampled as part of an annual monitoring
<br /> event to be conducted in July 2003 Installation of a monitor well in the vicinity of former monitor well
<br /> MW-8 and a down-gradient monitor well will be conducted following development of the property that
<br /> the former MW-8 was located on A summary of the results of the second quarter, 2003 groundwater
<br /> monitoring event is provided in Table 1 on the following page
<br /> �a1, CONDOR
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