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l <br /> f T <br /> C A M B R I A <br /> i <br /> June 9, 1999 <br /> Mr Jeffrey Wong <br /> San Joaquin County Public Health Services <br /> T7 <br /> Environmental Health Division <br /> 304 E Weber Avenue, Third Floor s <br /> Stockton, California 95202 JON 3 <br /> Re Site Investigation Report ENVJr- <br /> Shell-branded Service Station PES`- I'm <br /> 880 Victor Road <br /> Lodi, California <br /> SAP Code 135446 <br /> Incident 498995526 <br /> Dear Mr Wong <br /> Cambria Environmental Technology, Inc (Cambria) prepared this report on behalf of Equiva <br /> Services LLC (Equiva) to document site investigation activities at the above referenced site <br /> The purpose of the investigation was to delineate the vertical and lateral extent of methyl <br /> tertiary butyl ether (MTBE) in the vicinity of the underground fuel storage tank (UST) <br /> complex The scope of work followed during this investigation was presented in Cambria's <br /> October 15, 1998 Site Investigation Work Plan The investigation was initiated by San <br /> Joaquin County Public Health Services (SJCPHS) September 9, 1998 correspondence, and the <br /> work was performed in accordance with SJCPHS and Central Valley Regional Water Quality <br /> Control Board (RWQCB) guidelines <br /> SITE BACKGROUND <br /> Site Description The site is currently a non-operating gasoline station located on the <br /> I <br /> southeast corner of Beckman and Victor Roads in Lodi, California (Plate 1) The site layout <br /> consists of a service station building, two dispenser islands, a UST complex, and a waste oil <br /> tank (Plate 2) <br /> o a k I a n d CA Previous Investigations During December 1994, four single-walled steel USTs (two 10,000- <br /> Sonoma CA <br /> P o r t I a n d OR gallon and two 6,000-gallon) were removed along with associated product piping Soil <br /> S e a t t I e WA samples collected beneath the former dispenser islands and product piping did not contain <br /> detectable concentrations of petroleum hydrocarbons Petroleum hydrocarbons were <br /> Cambria detected in soil samples collected from the former UST excavation Over-excavation was <br /> Environmental <br /> Technology,Inc performed and additional soil samples were collected Soil sample TP-1, collected at 21 feet <br /> below grade (fbg) contained 1,000 parts per million (ppm) of total petroleum hydrocarbons <br /> Serkins2Street as gasoline TAH and soil sample EN-2NSW collected at 17 fb contained 0 024 m <br /> P 0 Box z59 g { g)' P � g' PP <br /> Sonoma CA 95476 <br /> Tel(7o7)935-4650 <br /> Fax(7o7)935-6649 <br />