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CAMBRIA <br /> -� I <br /> 21 Fri 11 57 <br /> June 15, 2000 <br /> Mr Jeffery Wong <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 East Weber Avenue, Third Floor <br /> Stockton, California 95202 <br /> Re Groundwater Monitoring Report - Second Quarter 2000 <br /> Shell-branded Service Station <br /> 4315 Waterloo Road <br /> Stockton, California <br /> SAP Code 136143 <br /> Incident No 98996183 <br /> SJCPHS/EHD Code 1760 <br /> Dear Mr Wong <br /> This report describes the recently completed sampling activities at the referenced site <br /> (Figures ] and 2) Cambria Environmental Technology, Inc (Cambria) prepared this report <br /> to meet quarterly reporting requirements issued by the Central Valley Regional Water Quality <br /> • Control Board and San Joaquin County Public Health Services, Environmental Health <br /> Division (SJCPHS/EHD) <br /> Quarterly Monitoring & Sampling Summary <br /> Groundwater monitoring and well sampling for the second quarter of 2000 is summarized <br /> below <br /> • Blaine Tech Services, Inc (Blaine), of San Jose, California measured the groundwater <br /> level and collected groundwater samples from monitoring well MW-1 on <br /> April 18, 2000 Samples were transported to Sequoia Analytical Laboratory of <br /> Morgan Hill, California for chemical analyses <br /> Oakland CA 0 MTBE (by EPA Method 8020) was reported in the groundwater samples collected <br /> San Ramon CA from well MW-1 at a concentration of 15 0 ppb MTBE was confirmed at a <br /> Sonoma CA concentration of 16 8 ppb by an EPA Method 8260A analysis TPHg and BTEX <br /> Portland OR <br /> were not detected in the well this quarter A chemical concentration map is presented <br /> cambna on Figure 2 <br /> Environmental <br /> 'technology,Inc <br /> *)Tkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />