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C A M B R i A <br /> r 1) 17 Pri 12= 29January 15, 2002 <br /> Mr Robert 3 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 /> Second Semi-Annual 2001 <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 monitonng 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-lA using a high-vacuum truck <br /> During August 2000, a submersible pump was installed to pump groundwater from the well into an <br /> Oakland CA aboveground storage tank Water, accumulated in the tank, was emptied periodically by a vacuum <br /> San Ramon, CA truck and transported to the Martinez refinery for recycling Between March 26, 1999 and <br /> Sonoma, CA <br /> March 30, 2001, a total of 486,893 gallons of groundwater was pumped from RW-IA,removing an <br /> Cambria estimated 44 pounds(Ibs)of total purgeable hydrocarbons as gasoline(TPHg), 11 lbs of benzene, and <br /> Environmental 93 lbs of methyl tertiary butyl ether (MTBE) On May 31, 2001, construction of a permanent <br /> Technology,Inc <br /> groundwater extraction (GWE)system was completed <br /> rkins Street <br /> P Boz 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />