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_0 0 0 <br /> CAMBRIA <br /> I <br /> 00 JUL ? I P1112 30 <br /> July 19, 2000 <br /> Mr Jeffrey 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 /> Former Shell Service Station <br /> 880 Victor Road <br /> Lod,, California <br /> SAP Code 135446 <br /> Incident No 98995526 <br /> SJCPHS/EHD Site Code 1746 <br /> Dear Mr Wong <br /> This report describes the recently completed activities associated with groundwater <br /> monitoring and sampling at the referenced site (Figures 1 and 2) This report was prepared to <br /> meet quarterly reporting requirements issued by the Regional Water Quality Control Board, <br /> Central Valley Region and San Joaquin County Public Health Services (SJCPHS) <br /> Quarterly Monitoring & Sampling Summary <br /> Groundwater monitoring and sampling for the second quarter of 2000 is summarized below <br /> • Blaine Tech Services, Inc (Blaine), of San Jose, California measured groundwater <br /> levels and collected groundwater samples in wells MW-1 through MW-3 on <br /> April 26, 2000 Samples were transported to Sequoia Analytical of Morgan Hill <br /> California, for chemical analyses <br /> • Cambria Environmental Technology, Inc (Cambria) evaluated water-level <br /> measurement data and prepared a groundwater contour map (Figure 2) Groundwater <br /> Oakland CA flow direction is to the northeast at an approximate hydraulic gradient of 0 003 <br /> San Ramon CA <br /> Sonoma CA . TPHg was detected in wells MW-2 and MW-3 at concentrations of 175 and 130 ppb, <br /> Portland OR <br /> respectively TPHg was not detected in well MW-1, and benzene was not detected to <br /> Cambria any of the wells MTBE (by EPA Method 8020) was reported in the groundwater <br /> Environmental samples collected from wells MW-1 through MW-3 at concentrations ranging from <br /> Technology,Inc 4,110 to 10,300 ppb MTBE (by EPA Method 826OA) was detected in well MW-3 <br /> OeTkins Street <br /> P 0 Box 259 <br /> Sonoma CA 95476 <br /> Tel(707)935-4850 <br /> Fax(707)935-6649 <br />