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CAM B_ R I A DEC 2 2 2003 <br /> ENVIRONMENT HEALTH <br /> PERMIT/SERVICES December 19, 2003 <br /> Ms.Lori Duncan <br /> San Joaquin County Environmental Health Department <br /> 304 East Weber Avenue,Third Floor <br /> Stockton,California 95202 `.r <br /> Re: Groundwater Monitoring Report Third Quarter 2003 & <br /> Groundwater Analytical Reduction Request <br /> Former Texaco Service Station/United,Gas. <br /> . 440 West Charter Way `. <br /> Stockton;California <br /> SAP Code 121258 <br /> Incident No.88870583 <br /> :. SJCEHD Site.Code:.1055 <br /> Dear Ms:Duncan: <br /> Cambria Environmental Technology, Inc. ;(Cambria) prepared this report on behalf of"Equilon <br /> Enterprises LLC dba Shelf Oil Products US .(Shell)in accordance With .the.quarterly reporting <br /> 4 . .requirements of 23 CCR.2652d. <br /> THIRD QUARTER 2003 ACTIVITIES v <br /> Blame Tech Services,Inc. (Blaine)of-San`Jose, California gauged:and sampled the site wells and <br /> prepared a summary table of field'gauging;data and petroleum hydrocarbon.and methyl tertiary <br /> butyl ether concentrations. Blaine's:report,, presenting. the laboratory. report, is included as. <br /> Appendix A. . <br /> Cambria prepared a summary table of additional 1groundwater analytical. data (Table'1);.a site <br /> j vicinit /well survey ma (figure '1 , and oundwater.contour/chemical concentration maps for <br /> Y Y P ( �' ) �` P <br /> the shallow groundwater zone(Figure 2) and fora the.two'deeper water-bearing zones (Figures 3 <br /> and.4). ..Groundwater sampling at the subject site wag"not coordinated with-sampling at the <br /> Chevron service'.station (508 West' Charter Way) .;and the. former Arco service station <br /> (441,West Charter Way) due to a- miscommunication. ":However; we were able to coordinate. <br /> o a k I a n a, CA Water level measurements for` the deep' wells At'. both the subject.. site .and the Arco site. <br /> San Ramon, CA <br /> Sonoma, CA Laboratory analytical,and groundwater elevation-data from the two adjacent sites,is included as <br /> Appendix B. . <br /> Cambria <br /> Environmental <br /> Technology,Inc. <br /> Perkins Street <br /> P.O.Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />