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{ <br /> BLAINE JOSE,985 Y DRIVE <br /> SAN JOSE, CA 95133 <br /> (40B) 995-5535 <br /> TECH SER �I®® I NC FAX(408) 293-8773 <br /> Septemb 1ctV <br /> ria <br /> Brett Hunter 0 CT 2 7 9993 <br /> Chevron U S A Products Company 6NVIRONME TAA HEALTH <br /> 2410 Camano Ramon PERM SERVICES <br /> San Ramon, CA 94583-0804 <br /> 3rd Quarter 1993 monitoring at 9-1848 <br /> Thud Quarter 1993 Groundwater Monnton ng at <br /> Chevron Service Station number 9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> Monitoring performed August 26, 1993 <br /> Groundwater Sampling Report 930826-C-2 <br /> This report covers the routine quarterly monitoring of groundwater wells at this Chevron facility <br /> Blaine Tech Services, Inc 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 Purgewate�Is,likewise, collected and <br /> transported to Chevron's Richmond Refinery 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 containsnew gro�tt�iwater�evatton calculations taken from the computer plotted gradient <br /> map which is located in the Professional Engineering Appendix <br /> Blaine Tech Services,Inc Report fro 930826-C-2 3rd 0-1993 Monitoring at Chevron 9-1848 page 1 <br />