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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES SAN JOSE,CALIFORNIA 95112-1105 <br /> (408)573-7771 FAX <br /> 14T Th (408)573-0555 PHONE <br /> No ooc.'� <br /> October 22, 1999 <br /> Brett Hunter <br /> Chevron U S A Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 3rd Quarter 1999 Monitoring at 9-6171 <br /> Third Quarter 1999 Groundwater Monitoring at <br /> Chevron Service Station Number 9-6171 <br /> 6633 Pacific Ave <br /> Stockton, CA <br /> is Monitoring Performed on August 26, 1999 <br /> Groundwater Sampling Report 990$26-K-1 <br /> This report covers the routine monitoring of groundwater wells at this Chevron facility Blame <br /> 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, <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 McKittrick Waste Treatment Site for disposal <br /> j <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 /> Htaine Tech Services, Inc Report No 990826-K-1 3rd-Q 1999 Monitoring at Chevron 9-6171 <br />