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„f <br /> � 1 <br /> i <br /> BLAINS 1680 ROGERS AVENUE <br /> TECH SERVICES— SAN JOSE,CALIFORNIA 95112-1105 <br /> (408)573-7771 FAX <br /> z�� rsT rrrr� (408)573-0555 PHONE <br /> 1 y <br /> January 21, 2000 <br /> Brett Hunter <br /> Chevron U S A Pioducts Company <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 4th Quarter 1999 Monitoring at 9-6171 <br /> Fourth Quarter 1999 Groundwater Monitoi ing at <br /> Chevron Service Station Number 9-6171 <br /> 6633 Pacific Ave <br /> Stockton, CA <br /> i� Monitoring Performed on November 17, 1999 <br /> Groundwater Sampling Report 991117-R-2 <br /> This report covers the ioutine monitoring of groundwater wells at this Chevron facility Blaine <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 McI ittrick Waste Treatment Site for disposal <br /> Basic field iinformation 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 fol 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 /> Blaine Tech Services, Inc Report No 991117-R-2 4th-Q 1999 Monitoring at Chevron 9-6171 <br />