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«�f r <br /> CAMBRIA <br /> March 30, 1998 <br /> Mr Alex Perez <br /> Shell Oil Products Company <br /> P O BOX 8080 <br /> Martinez, California 94553 <br /> Re Quarterly Monitoring Report _ First Quarter 1998 <br /> Shell Service Station <br /> 620 West Charter Way <br /> Stockton, California <br /> WIC 4204-7524-4305 <br /> Dear Mr Perez <br /> This Quarterly Monitoring Report describes the recently completed activities associated with <br /> ground water monitoring and sampling at the referenced site (Plates I and 2) This report was <br /> prepared to meet quarterly reporting requirements issued by the Regional Water Quality Control <br /> • Board, Central Valley Region and San Joaquin County Public Health Services, Environmental <br /> Health Division (SJCPHS-EHD) <br /> A soil vapor extraction (SVE) system has been operated at this site since September 17, 1992 <br /> The following table summarizes soil and ground water remediation performed to date by SVE <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS (TPPH) <br /> REMOVED - VAPOR PHASE <br /> COMPOUND CUMULATIVE <br /> TPPH 17,628 pounds <br /> CAMBRIA <br /> Quarterly Monitoring & Sampling Summary <br /> ENVIRONMENTAL <br /> TECHNOLOGY,INC Ground water monitoring and sampling for the first quarter of 1998 are summarized below <br /> 270 PERKINS STREET, � Blaine Tech Services, Inc (Blaine), of San Jose, California measured ground water levels <br /> PO Box 259 and collected samples from nine on-site wells (Wells MW-1 through MW-9) and one <br /> off-site well (Well MW-10) on February 9, 1998 Samples were transported to VOC <br /> SONOMA, <br /> Laboratory of Benicia, California for chemical analysis <br /> CA 95476 <br /> 935-4850 <br /> FAX{7M 9356649 <br />