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BLAINE 1680 ROGERS AVENUE <br /> SAN JOSE,CALIFORNIA 95112-1105 <br /> TECH SERVICES. (408)573-7771 FAX <br /> 14T 7y� . (408)573-0555 PHONE <br /> N <br /> 'SND �et' <br /> January 21, 2000 <br /> Biett I-junte1 <br /> Chevi oil USA Products Company <br /> P O Box 6004 <br /> San Ramon, CA 94563-0904 <br /> 4th Quarter 1999 Monitoring at 9--8264 <br /> Fourth Quarter 1999 Gi oundwatei Moni toi ing at <br /> Chevron Service Station NUmbei 9-9204 <br /> 3775 Tiacy Blvd <br /> Tl acy, CA <br /> Monitoling Peifoinled on November 23, 1999 <br /> s <br /> Gioitndwatci Sampling Repoit 991123-A-3 <br /> This leport coveis the routine nioiutoling of grorundwatul wells at (Ills Chevion facility Blame <br /> Tech Services, 11-1c 's work at the site includes inspection, gauging, evacuation, purgewatet <br /> containment, sample collection and sample handling in accordance with standard pioceduies that <br /> conform to Regioual Watei Quality Control Board iecluuemcnts <br /> Routuae✓ field data collectioia 111Cludes depth to water, total well clelatll tlilckriess of ally separate <br /> 11111111sc,lble layer, water colunul volume, calculated volullae ora three-t,ase voluaiie pulge, <br /> elapsed evacuation time, total volume of water removed, and standard watei paianaetei <br /> instrument readings Sample matenaI is collected, contained, stoied, and tiarrspoi ted to the <br /> laboratory Ira conformance with BPA standards Purgewatei is, likewise, collected asci <br /> transported to McKittrick Waste Tieatment Site fol disposal <br /> Basic field infonrlatron is presented alongside analytical values excerpted from the laboi atoi y <br /> report "I the cumulative table of WELL DATA AND ANALYTICAL RE,SULTS The full <br /> analytical report for the most iecent samples is located In the Analytical Appel]dix The table <br /> also contains new groundwater elevation calculations taken from the computer plotted gradient <br /> map, wlaicll is located In the Pi oiessional Engineering Appendix <br /> Blame Tech Services, Inc Report No 991123-A-3 41h-Q 1999 Monitoring at Chevron 9-8264 <br />