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T1 AY 2 7 '94JMM., <br /> BLAINE985 TIMOTHY DRIVE <br /> SAN JOSE,CA 95133 <br /> TECH SERMICES INC (408) 995-5535 <br /> FAX(408)293-8773 <br /> • <br /> May 25, 1994 <br /> Brett Hunter PK%E C E"I V E D' <br /> Chevron U S A Products Company <br /> 2410 Camino Ramon S E P 0 1 1994 <br /> San Ramon, CA 94583-0804 <br /> ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> 2nd Quarter 199 -monitoring at 9-1848 <br /> Second Quarter 1994 Groundwater Monitoring at <br /> Chevron Service Station number 9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> Monitoring performed on May 10, 1994 <br /> • <br /> Groundwater Sampling Report 940510-L-1 <br /> This report covers the routine quarterly monitoring of groundwater wells at this Chevron facility. <br /> Blaine Tech Services, Inc work at the site includes inspection, gauging, evacuation,purgewater <br /> containment, sample collection and sample handling in accordance with standard procedures that <br /> conform to Regional Water Quality Control Board requirements <br /> Routine field data collection includes depth to water, total well depth, thickness of any separate <br /> immiscible layer, water column volume, calculated volume of a three case volume purge, <br /> elapsed evacuation tune, total volume of water removed, and standard water parameter <br /> instrument readings Sample material is collected, contained, stored, and transported to the <br /> laboratory in conformance with EPA standards Purgewater is, likewise, collected and <br /> transported to Chevron's Richmond Refinery for disposal <br /> Basic field information is presented alongside analytical values excerpted from the laboratory <br /> report in the cumulative table of WELL DATA AND ANALYTICAL RESULTS The full <br /> analytical report for the most recent samples is located in the Analytical Appendix The table <br /> also contains new groundwater elevation calculations taken from the computer plotted gradient <br /> . map which is located in the Professional Engineering Appendix <br /> Blaine Tech Services,Inc Report No 94051 d-L-1 2nd Q-1994 Monitoring at Chevron 9-1848 page 1 <br />