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f <br /> i <br /> BLAINE 1680 ROGERS AVENUE <br /> SAN JOSE,CALIFORNIA 95112 <br /> TECH SERVICES w (408)573-7771 FAX <br /> TH�o (408)573-0555 PHONE <br /> z <br /> � o <br /> c <br /> qND DO�V <br /> December 11, 1997 <br /> Brett Hunter <br /> Chevron U.S.A. Products Company <br /> P.O. Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 4th Quarter 1997 Monitoring at 9-1452 <br /> Fourth Quarter 1997 Groundwater Monitoring at <br /> Chevron Service Station Number 9-1452 <br /> 334 East Main St. <br /> Ripon, CA <br /> Monitoring Performed on October 31, 1997 <br /> Groundwater Sampling Report971031-F-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 /> i <br /> Routine field data collection includes depth to water, total well depth, thickness of any separate <br /> i <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 /> 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 /> I, <br /> i <br /> Blaine Tech Services,Inc. Report No. 971031-F-1 4th Q-1997 monitoring at Chevron 9-1452 <br /> i <br />