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CAMBRIA <br /> • <br /> April 30, 2004 <br /> Ms Lori Duncan <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report— First Quarter 2004 <br /> Shell-branded Service Station <br /> 7910 Lower Sacramento Road <br /> Stockton,California M <br /> SAP Code 136139 <br /> Incident No 98996180 <br /> SJCEHD Site Code 1660 MAY 0 2004 <br /> ENVIRONMtNT HEALTH <br /> Dear Ms Duncan PERMIT/SERVICES <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equilon <br /> Enterprises LLC dba Shell Oil Products US (Shell) in accordance with the quarterly reporting <br /> requirements of 23 CCR 2652d <br /> FIRST QUARTER 2004 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 petroleum hydrocarbon and methyl tertiary <br /> butyl ether concentrations Cambria prepared a site vicinity map (Figure 1) and a groundwater <br /> contour/chemical concentration map(Figure 2) Blaine's report,presenting the laboratory report, <br /> is included as Appendix A <br /> Shell received San Joaquin County Environmental Health Department's (SJCEHD's) <br /> March 18, 2004 letter recommending case closure to the Regional Water Quality Control Board <br /> (RWQCB) <br /> ANTICIPATED SECOND QUARTER 2004 ACTIVITIES <br /> As approved by SJCEHD staff during an April 30, 2004 telephone conversation, groundwater <br /> Cambria monitoring will be suspended at this site pending the RWQCB's response to SJCEHD's case <br /> Environmental <br /> Technology,Inc closure recommendation <br /> 1-10111S Street <br /> to A <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />