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4 <br /> BRA <br /> r r <br /> r June 13, 2000 <br /> Ms Lori Duncan <br /> San Joaquin County Public Health Services <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Quarterly Monitoring Report - First Quarter 2000 <br /> C M Weber Enterprises Property <br /> 141 North EI Dorado Street <br /> Stockton, California <br /> SAP Code 118532 <br /> Incident No 97130156 <br /> Dear Ms Duncan <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 also been operated at the. <br /> site The most recent soil vapor extraction system operation utilizing activated carbon was <br /> terminated on August 21, 1996 The following table summarizes remediation performed to <br /> date <br /> Total Purgeable Petroleum Hydrocarbons Removed (pounds) <br /> LIQUID PHASE VAPOR PHASE CUMULATIVE <br /> 37 3277 3314 <br /> Quarterly Monitoring & Sampling Summary <br /> Oakland CA <br /> San Pamon, CA Groundwater monitoring and sampling for the first quarter of 2000 is summarized below <br /> Sonoma CA <br /> P o T 11 an d, OR o Blaine Tech Services, Inc (Blaine) of San Jose, California measured groundwater <br /> Cambria levels in wells MW-1 through MW-5, RW-1, and RW-2, and collected groundwater <br /> Environmeritall samples from wells MW-1 through MW-5, RW-1, RW-2, VEW-1 through VEW-4 on <br /> Technology,inc March 29, 2000 The samples were transported to Sequoia Analytical of San Carlos, <br /> JPeTlunsSIMI California for chemical analyses <br /> P 0 Sox 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4650 <br /> Fax(707)935^6649 <br />