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CAMBRIA <br /> SEP t 9 ZOOZ � <br /> ENVIRONMENT HEALTH September 17, 2002 i <br /> PERMIT/SERVICES <br /> Mr RobertJ Castelli <br /> j <br /> Technical Services Supervisor 1 <br /> c/o Mr Richard Stiffler <br /> City of Stockton Department of Municipal Utilities <br /> Environmental Control Section <br /> 2500 Navy Drive <br /> Stockton, CA 95206-1191 <br /> Re Self-Monitoring Report <br /> Shell-branded Service Station <br /> 2575 Country Club Blvd <br /> Stockton, California <br /> Incident#98996184 <br /> SAP 136144 <br /> Dear Mr Castelli <br /> On behalf of Equilon Enterprises LLC dba Shell Oil Products US (Shell), Cambria Environmental <br /> Technology, Inc (Cambria)presents this self-monitoring report for the referenced site Discussed <br /> . below are the site background, a description of the treatment system, system sampling, system <br /> performance, and planned future activities <br /> SITE BACKGROUND <br /> The subject site is located on the northeastern corner of the intersection of Country Club Boulevard <br /> and Plymouth Road in Stockton,California The site is an operating service station with a site layout, <br /> which includes a service station building, an underground fuel storage tank(UST)complex located <br /> in the southwestern corner of the site,four dispenser islands, and a waste oil tank The location of the <br /> former UST complex is in the southeastern portion of the site <br /> In March 1999, groundwater was extracted weekly from well RW-lA using a high-vacuum truck <br /> During August 2000,a submersible pump was installed to pump groundwater from the well into an <br /> aboveground storage tank Water, accumulated in the tank, was emptied periodically by a vacuum <br /> truck and transported to the Martinez refinery for recycling Between March 26, 1999 and <br /> Oakland CA <br /> San Ramon CA July 17, 2001, a total of 622,649 gallons of groundwater was pumped from RW-lA, removing an <br /> Sonoma CA estimated 397 pounds(lbs)of total purgeable hydrocarbons as gasoline(TPHg),63 1 lbs of benzene, <br /> and 671 lbs of methyl tertiary butyl ether(MTBE) On May 31, 2001, construction of a permanent <br /> Cambria <br /> Environmental groundwater extraction (GWE) system was completed <br /> Technology,Inc. <br /> Serkins Street <br /> P O Box 259 <br /> Sonoma,CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />