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FE-5) <br /> C A M B R I A FEE, 44 20,9,5 � <br /> ENVIR014?�":rj f HEALTH <br /> PERMIT/SERACES <br /> February 1, 2005 <br /> Ms Lori Duncan <br /> San Joaquin County Environmental Health Department <br /> 304 E Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Third Quarter 2004 Groundwater Monitoring Report f L <br /> Shell-branded Service Station <br /> 6131 Pacific Avenue <br /> Stockton, California <br /> SAP Code 136149 <br /> Incident No 98996189 ' <br /> SJCEHD Site Code 1223 <br /> Dear Ms Duncan <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 /> THIRD QUARTER 2004 ACTIVITIES <br /> Blaine Tech Services, Inc (Blaine) of San Jose, Califorma gauged and sampled the site wells and <br /> prepared a summary table of field gauging and petroleum hydrocarbon and laboratory analytical <br /> data Cambria prepared a site vicinity/well survey 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 The laboratory noted that the total petroleum hydrocarbons as gasoline <br /> (TPHg) reported toi wells MW-3, MW-4, and MW-6 through MW-12 contain one discrete peak in <br /> the gasoline range As noted previously, this is due to the presence of tetrachloroethene (PCE) in <br /> these wells <br /> ANTICIPATED FOURTH QUARTER 2004 ACTIVITIES <br /> Blaine will gauge and sample the site wells according to the existing sampling schedule and will <br /> tabulate the data Cambria will prepare a groundwater monitormg report <br /> Cambria <br /> Environmental Cambria conducted a 5-day dual-phase extraction test at the site from June 21 through 25 2004 <br /> Technology,Inc We will submit a report describing these activities under separate cover <br /> Hollis Street <br /> to A <br /> Emeryville CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />