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• Y 3 <br /> � t <br /> CAhIIBRIA - <br /> September 22, 1999 <br /> Mr Mike Infurna <br /> San Joaquin County Public Health Services <br /> 304 East Weber Street, Third Floor <br /> Stockton, California 95202 <br /> Re Quarterly Monitoring Report - Third Quarter 1999 <br /> C M Weber Enterprises Property <br /> 141 North El Dorado Street <br /> Stockton, California <br /> Sap # 118532 <br /> Incident 9 97130156 <br /> Dear Mr Infurna <br /> This report describes the recently completed groundwater monitoring and sampling activities <br /> at the referenced site Cambria Environmental Technology, Inc (Cambria) prepared this <br /> report to meet quarterly reporting requirements issued by the Regional Water Quality Control <br /> Board, Central Valley Region (RWQCB) and San Joaquin County Public Health Services <br /> • (SJCPHS) <br /> A groundwater extraction system was in operation at the site from March 2, 1993 through <br /> September 5, 1995 Several soil vapor extraction systems have operated at the site The <br /> most recent soil vapor extraction system operation utilizing activated carbon was terminated <br /> on August 21, 1996 The following table summarizes remediation performed to date <br /> Total Purgealble Petroleum Hydrocarbons Removed (pounds) <br /> LIQUID PHASE VAPOR PHASE CUMULATIVE <br /> 37 3277 3314 <br /> Quarterly Monitoring & Sampling Summary <br /> Oakland CA Groundwater monitoring and sampling for the third quarter of 1999 is summarized below <br /> Sonoma CA <br /> Portland OR <br /> S e a t t l e WA o Blaine Tech Services, Inc (Blaine), of San Jose, California measured groundwater <br /> levels and collected groundwater samples in wells MW-1 through MW-5, RW-1, <br /> Cambria <br /> Environmental RW-2, and VEW-1 through VEW-4 on July 26, 1999 The samples were transported <br /> Technology,Inc to Sequoia Analytical of Morgan Hill and Petaluma, California for chemical analysis <br /> 011,kins Street <br /> P D Box 259 <br /> Sonoma CA 95476 <br /> 7el(707)935 4850 <br /> Fax(7o7)935-6649 <br />