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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES SAN JOSE,CA 95112-1105 <br /> (408)573-7771 FAX <br /> (408)573-0555 PHONE <br /> Q� A <br /> 9 <br /> pl <br /> C <br /> February 15, 1999 <br /> Brett Hunter <br /> Chevron U S A Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 4th Quarter 1998 Monitoring at 9-6171 <br /> Fourth Quarter 1998 Groundwater Monitoring at <br /> Chevron Service Station Number 9-6171 <br /> 6633 Pacific Ave <br /> Stockton, CA <br /> Monitoring Performed on November 18, 1998 <br /> r" <br /> Groundwater Sampling Report 981118-K-1 <br /> This report covers the routine 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 /> nstrument readings Sample material is collected, contained, stored, and transported to the <br /> aboratory in conformance with EPA standaids Purgewater is, likewise, collected and <br /> ansported to McKittnck Waste Treatment Site for disposal <br /> sic field information is presented alongside analytical values excerpted from the laboratory <br /> r ort in the cumulative table of WELL DATA AND ANALYTICAL RESULTS The full <br /> lytical report for the most recent samples is located in the Analytical Appendix The table <br /> al contains new groundwater elevation calculations taken from the computer plotted gradient <br /> Blaine Tech Services,Inc Report No 981118-K-1 4th-Q 1998 Monitoring at Chevron 9-$171 <br />