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C A M B R I A <br />�* DEC 2 9, 2003 <br /> ENVIRON! _ HEALTH <br /> PFW f; WWRVICES December 17, 2003 <br /> Mr Jeffrey Wong <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report— Fourth Quarter 2003 <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> Stockton, California <br /> SAP Code 136143 <br /> Incident No 98996183 <br /> SJCEHD Code 1760 <br /> Dear Mr Wong <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 26524 <br /> FOURTH QUARTER 2003 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 Cambia prepared a table of oxygenate data (Table 1), a site <br /> vicinity/receptor survey map (Figure 1), and a groundwater contour/cheinical concentration map <br /> (Figure 2) Blaine's report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED FIRST QUARTER 2004 ACTIVITIES <br /> Blaine will gauge and sample all site wells according to the existing sampling schedule and <br /> tabulate the data Cambria will prepare a groundwater monitoring report <br /> Oakland CA <br /> San Ramon CA <br /> Sonoma, CA <br /> Cambria <br /> Environmental <br /> Technology,Inc <br /> oPeTkinsStTeet <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />