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L <br /> t <br /> CAMBRIA <br />• <br /> June 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 - Second 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 1 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-PHD) <br /> A soil vapor extraction (SVE) system operated at this site from September 1992 to November <br /> 1996 The following table summarizes soil and ground water remediation performed to date by <br /> SVE <br /> TOTAL PURGEABLE PETROLEUM HYDROCARBONS (TPPH) <br /> REMOVED - VAPOR PHASE <br /> COMPOUND CUMULATIVE <br /> CAMBRIA TPPH 17,628 pounds <br /> ENVIRONMENTAL Quarterly Monitoring & Sampling Summary <br /> TECHNOLOGY,INC <br /> Ground water monitoring and sampling for the second quarter of 1998 are summarized below <br /> 270 PERKINS STREET, <br /> PO Box 259 • Blaine Tech Services, Inc (Blaine), of San Jose, California measured ground water levels <br /> and collected samples from Wells MW-1 through MW-10 on May 21, 1998 Samples <br /> SONOMA, were transported to Sequoia Analytical Laboratory Redwood City, California for <br /> CA 95476 chemical analysis <br /> 0(707)935-M <br /> FAx (707 935-6649 <br />