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��l r BLAINE 1880 ROGERS AVENUE <br /> TECH SERVICES.w SAN JOSE,CALIFORNIA 95112-1105 <br /> (408)573-7771 FAX <br /> 24ka �r r~ o A� (408)573-0555 PHONE <br /> Yh <br /> May 27 1999 <br /> Brett Hunter <br /> Chevron USA Pioducts Company <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> 1st Quarter 1999 Monitoring at 9-9840 <br /> First Quarter 1999 Groundwater Monitoring at <br /> Chevron Service Station Number 9-9840 <br /> 4344 Waterloo Rd <br /> Stockton, CA <br /> Monitoring Performed on March 19, 1999 <br /> Groundwater Sampling Report 990319-T-3 <br /> This report covers the routine monitoring of groundwater wells at this Chevron facility Blaine <br /> Tech Services, hic '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 /> Route ie 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 990319-T-3 1 st 0- 1999 Monitoring at Chevron 9-9840 <br />