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C A M B R I A <br /> August 29, 2001 <br /> Mr Robert J Castelli <br /> Technical Services Supervisor <br /> c/o Mr Richard Stiffler <br /> City of Stockton Dept of Municipal Utilities <br /> Environmental Control Section <br /> 2500 Navy Drive <br /> Stockton, CA 95206-1191 <br /> Re Self-Monitoring Report <br /> First Semi-Annual 2009 <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 Equiva Services LLC, Cambria Environmental Technology, Inc (Cambria) presents this <br /> self-monitoring report for the referenced site Discussed below are the site background, a description <br /> of the treatment system, system sampling, system 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-1A using a high-vacuum truck <br /> Oakland CA During August 2000, a submersible pump was installed to pump groundwater from the well into an <br /> San Ramon CA aboveground storage tank Water, accumulated in the tank, was emptied periodically by a vacuum <br /> Sonoma CA truck and transported to the Martinez refinery for recycling Between March 26, 1999 and March 30, <br /> Cambria 2001, a total of 486,893 gallons of groundwater was pumped from RW-IA, removing an estimated <br /> environmental 44 pounds (lbs) of total purgeable hydrocarbons as gasoline (TPHg), I I lbs of benzene, and 93 lbs of <br /> Tonh'T nlnology, Inc methyl tertiary butyl ether (MTBE) On May 31, 2001, construction of a permanent groundwater <br /> 65th Street extraction (GWE) system was completed <br /> Suite B <br /> Oakland CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />