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BLAINE 1680 ROGERS AVENUE <br /> TECH SERVICES SAN JOSE CA 95112-1105 <br /> (408)573-7771 FAX <br /> g4 <br /> T rhea (408)573-0555 PHONE <br /> 7� <br /> � 2 <br /> C <br /> January 20, 1998 JAN 2 9 1999 <br /> Brett Hunter ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> Chevron U S A Products Company - <br /> P O Box 6004 <br /> San Ramon, CA 94583-0904 <br /> Atli Quarter 1998 Monitoring at 9-1848 <br /> Fourth Quai tet 1998 Gioundwatet Monitoring at <br /> Chevron Service Station Numbet 9-1848 <br /> 1257 Yosemite Avenue <br /> Manteca CA <br /> Monitoring Pei fornied on November 18, 1998 <br /> Groundwater Sampling Report 981118-K-2 <br /> This report covert the routine monitoring of groundwatei wells at this Chevron facility Blaine <br /> 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, elapsed <br /> evacuation time, total volume of water removed, and standard water parameter instrument <br /> readings Sample material is collected, contained, stored, and transported to the laboratory in <br /> conformance with EPA standards Purgewater is, likewise, collected and transported to <br /> McKittrick Waste Treatment Site for disposal <br /> Basic field infomnation is presented alongside analytical values excerpted from the laboratory <br /> report in the cumulative table of WELL DATA AND ANALYTICAL RESULTS The frill <br /> analytical report for the most recent samples is located in the Analytical Appendix The table <br /> also contains new groundwatei elevation calculations taken from the computer plotted gradient <br /> snap which is located in the Professional Engineei ing Appendix <br /> Blaine Tech Services Inc Report No 981118-K-2 4th-0 1998 Monitoring at Chevron 9-1848 <br />