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4 <br /> Tr� ELAINE 985 TIMOTHY©RIVE <br /> SAN J05E, GA 95133 <br /> TECH SERV ICES INC FAX (408)293-8773 <br /> December 13, 1995 <br /> Brett Hunter <br /> Chevron U S A Products Company <br /> P O Box 5004 <br /> San Ramon, CA 94583-0804 <br /> 4th Quarter 1995 Monitoring at 9-0342 <br /> Fourth Quarter 1995 Groundwater Monitoring at <br /> Chevron Service Station Number 9-0342 <br /> 1347 South El Dorado Street <br /> Stockton, CA <br /> Monitoring Performed on November 16, 1995 <br />• <br /> Groundwater Sampling Report 951116-Z-2 <br /> This report covers the routine quarterly monitoring of groundwater wells at this Chevron facility <br /> Blaine Tech Services, Inc 's work at the site includes inspection, gauging, evacuation, <br /> purgewater containment, sample collection and sample handling in accordance with standard <br /> procedures that 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 time, 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 951116-Z-2 4th-0 1995 Monitoring at Chevron 9-0342 <br />