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7 <br /> BLAINE <br /> LAINE 985 TIMOTHY 9513E <br /> SAN JOSE, CA 95133 <br /> (408) 995-5535 <br /> TECH SERVICESINC FAX (408) 293-8773 <br /> October 31, 1996 <br /> Brett Hunter <br /> Chevron U S A Products Company <br /> P O Box 5004 <br /> San Ramon, CA 94583-0804 <br /> 3rd Quarter 1996 Monitoring at 9-4275 <br /> Third Quarter 1996 Groundwater Monitoring at <br /> Chevron Service Station Number 9-4275 <br /> 2905 West Benjamin Holt Drive <br /> Stockton, CA <br /> Monitoring Performed on September 24, 1996 <br /> Groundwater Sampling Report 960924-Z-1 <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, 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, elapsed <br /> evacuation time, total volume of water removed, and standard water parameter instrument <br /> readings Sample material is collected, contained, stored, and transported to the laboratory in <br /> conformance with EPA standards Purgewater is, likewise, collected and transported to <br /> McKittrick Waste Treatment Site 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 960924-Z-1 3rd-O 1996 Monitoring at Chevron 9-4275 <br />