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CAMBRIA <br /> June 15, 2002 <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 - Second Quarter 2002 <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 /> Effective March 1, 2002, Equiva Services LLC and Equilon Enterprises LLC are now doing <br /> business as (dba) Shell Oil Products US (Shell) Cambria Environmental Technology, Inc <br /> (Cambria) prepared this report on behalf of Shell in accordance with the quarterly reporting <br /> . requirements of 23 CCR 2652d <br /> SECOND 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 petroleum hydrocarbon and methyl tertiary <br /> butyl ether concentrations Cambria prepared an oxygenate and lead scavenger table (Table 1), a <br /> site vicinity/receptor survey map (Figure 1), and a groundwater contour/chemical concentration <br /> map(Figure 2) Blaine's report, presenting the laboratory report, is included as Appendix A <br /> ANTICIPATED THIRD QUARTER 2002 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 /> Cambna <br /> Environmental <br /> Technology,Inc <br /> Werkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> TO(707)935-4850 <br /> Pax(707)935-6649 <br />