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BLAINE1680 ROGERS AVENUE <br /> TECH SERVICES . SAN JOSE, CALIFORNIA 95112-1105 <br /> (408) 5734771 FAX <br /> ��cy,Nr (408) 573-0555 PHONE <br /> S <br /> TND eaN� <br /> January 28 , 2000 <br /> Brett Hunter <br /> Chevron U.S .A. Products Company <br /> P.O. Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 4th Quarter 1999 Monitoring at 9-3232 <br /> Fourth Quarter 1999 Groundwater Monitoring at <br /> Chevron Service Station Number 9-3232 <br /> 8660 Lower Sacramento Rd. <br /> Stockton, CA <br /> Monitoring Performed on December 15 & 22, 1999 <br /> Groundwater Sampling Report 991215-Y-2 <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 /> 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 /> also contains new groundwater elevation calculations taken from the computer plotted gradient <br /> map which is located in the Professional Engineering Appendix. <br /> Blaine Tech Services, Inc. Report No. 991215-Y-2 4th-Q 1999 Monitoring at Chevron 9-3232 <br /> f <br />