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t <br /> BLAINEAN85 JO TIMOTHY iY DRIVESAN JOSE, CA 95133 <br /> (408)995-5535 <br /> H SERV' 1 N C FAX(408) 293-8773 <br /> TEC <br /> December 20, 1993 <br /> Brett Hunter Alk M I V em <br /> Chevron U S A Products Company RE(A hu <br /> 2410 Camino Ramon JAN 2 4 1994 <br /> San Ramon, CA 94583-0804 ENVIRUNMENTAL HEALTH <br /> PERMIT/SERVICES <br /> 4th Quarter 1993 monitoring at 9-1848 <br /> Fourth Quarter 1993 Groundwater Monitoring at <br /> Chevron Service Station number 9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca, California <br /> Mon itonng performed November 23, 1993 <br /> • <br /> Groundwater Sampling Report 931123-W-1 <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 Purgewater 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 contains new groundwater elevation calculations taken from the computer plotted gradient <br /> map which is located in the Professional Engineering Appendix. <br /> go <br /> Blame Tech Services,Inc Report No 931123-W-1 4th 0-1993 Monitoring at Chevron 9.1848 page 1 <br />