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� t , <br /> r <br /> C A M B R I A <br /> June 15, 1999 <br /> Mr Mike Infurna <br /> San Joaquin County Public Health Services <br /> P O Box 388 <br /> Stockton, California 95201 <br /> Re Quarterly Monitoring Report - Second Quarter 1999 <br /> C M Weber Enterprises Property <br /> 141 North El Dorado Street <br /> Stockton, California <br /> WIC 4204-7524-1509 <br /> Dear Mr Infurna <br /> This Quarterly Monitoring Report describes the recently completed groundwater monitoring <br /> and sampling activities at the referenced site Cambria Environmental Technology, Inc <br /> (Cambria) prepared this report to meet quarterly reporting requirements issued by the <br /> Regional Water Quality Control Board, Central Valley Region and San Joaquin County Public <br /> Health Services (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 /> Groundwater monitoring and sampling for the second quarter of 1999 is summarized below <br /> Oakland [A <br /> Son o m a CA , Blaine Tech Services, Inc (Blaine), of San Jose, California measured groundwater <br /> Portland OR <br /> Sea 1 t I e WA levels and collected groundwater samples in Wells MW-1 through MW-5, RW-1, <br /> RW-2, and VEW-1 through VEW-4 on April 14, 1999 The samples were <br /> Cambna transported to Sequoia Analytical of Sacramento, California for chemical analysis <br /> Environmental <br /> Technology, Inc <br /> leerkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(7o7)935-6649 <br />