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e , <br /> r ' <br /> `b A IJ A <br /> t <br /> July 15, 2900 <br /> Ms Lori Duncan <br /> San Joaquin County Public Health Services N - <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Quarterly Monitoring Report - Second Quarter 2000 <br /> C M Weber Enterprises Property <br /> 141 North El 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 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 Purgeable Petroleum Hydrocarbons Removed (pounds) <br /> LIQUID PHASE VAPOR PHASE CUMULATIVE <br /> 37 3277 3314 <br /> Quarterly Monitoring & Sampling Summary <br /> Oakland, CA <br /> Groundwater monitoring and sampling for the second quarter of 2000 is summarized below <br /> � <br /> San Ramon CA <br /> Sonoma CA o Blaine Tech Services, Inc (Blaine) of San Jose, California measured groundwater <br /> Portland OR levels and collected groundwater samples from wells MW-1 through MW-4, RW-1, <br /> Cambria RW-2, and VEW-1 through VEW-4 on April 10, 2000 The samples were <br /> Environmental transported to Sequoia Analytical of Morgan Hill, California for chemical analyses <br /> Technology,Inc <br /> i <br /> Oerkins Street <br /> P O Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />