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C A M B R I A <br /> February 1, 2000 <br /> Mr Ron Rowe <br /> Environmental Health Division <br /> San Joaquin County Public Health Services <br /> 304 East Weber Avenue, 3"Floor <br /> Stockton, California 95201-0388 <br /> re Groundwater Extraction System Design <br /> Shell-branded Service Station <br /> 341 Main Street <br /> Ripon, California <br /> SAP No 135816 <br /> Incident No 98995874 <br /> Cambria Project No 241-0324 <br /> SJCEHD Site Code- 506186 <br /> Dear Mr Rowe <br /> Cambria Environmental Technology, Inc (Cambria) is pleased to submit this description of the <br /> proposed ground water extraction (GWE) and treatment system on behalf of Equiva Services <br /> LLC (Equiva) for the site referenced above We are scheduled to complete the installation of <br /> the GWE system by February 2, 2000, and would like to begin discharging to the sanitary sewer <br /> as soon as possible after that time <br /> Cambria has designed the proposed GWE system for flexibility, and will continually assess <br /> whether the system is operating as required, or needs to be modified to suit changing conditions <br /> and new information <br /> Ground Water Extraction and Treatment System <br /> Description of the GWE System• The proposed GWE system will pump ground water from <br /> existing extraction well EW-1 to a treatment compound at the rear of the site, and then to the <br /> Oakland CA sanitary sewer The treatment method for the extracted ground water will be granular activated <br /> Sonoma CA carbon The treated water will be discharged to the sanitary sewer The well locations and <br /> Portland OR GWE system design are shown in Figures 1 through 4 <br /> 5eattle WA <br /> Cambria Underground piping will transmit pumped water from the wells to the treatment area, and <br /> emironmensai <br /> tr^."Pr:a tr.".ated --atcr fom ereaearea rthttmnt to the canitnry cAwr TTtility tranrh Inratinnc ara <br /> -� -v <br /> Technology,Inc shown in Figure l Additional piping and electrical conduits have been installed to enable <br /> 94 65th Slreet additional wells to be connected to the system if needed in the future <br /> Suite 8 <br /> Oakland CA 94608 <br /> Tel(510)420-0700 <br /> Fax(510)420-9170 <br />