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CAMBRIA <br /> June 6, 2002 <br /> Mr Mike Infurna <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Street,Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report-- First Quarter 2002 <br /> Shell-branded Service Station <br /> 2494 East Fremont Street <br /> Stockton, California <br /> SAP Code 136141 <br /> Incident No 98996181 <br /> SJCPHS Site 506171 <br /> Dear Mr Infurna <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Shell in <br /> accordance with quarterly reporting guidelines issued by the Central Valley Regional Water <br /> Quality Control Board and San Joaquin County Public Health Services <br /> • FIRST QUARTER 2002 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, California gauged and sampled all site wells and <br /> prepared a summary table of field gauging data and laboratory analytical results Cambria <br /> compiled the additional laboratory analyses (Table 1), prepared a site vicinity/sensitive receptor <br /> survey map (Figure 1), and prepared a groundwater contour/chemical concentration map (Figure <br /> 2) Blaine's report,presenting the laboratory report,is included as Appendix A <br /> ANTICIPATED SECOND QUARTER 2002 ACTIVITIES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and <br /> tabulate the data Cambria will prepare a groundwater monitoring report Cambria prepared and <br /> issued a work plan for further assessment at this site The work plan was issued June 5,2002 <br /> Oakland {A <br /> San Ramon CA <br /> Son oma, CA <br /> Cambria <br /> Environmental <br /> Technology,Inc <br /> Wkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />