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BLAINE 985 TIMOTHY <br /> DRIVE <br /> SAN JOSE, CA 95133 95133 <br /> (408) 995-5535 <br /> TECH SERVICES SNC FAX (408) 293-8773 <br /> June 19, 1995 <br /> Brett Hunter <br /> Chevron U S A. Products Company <br /> P.O. Box 5004 <br /> San Ramon, CA 94583-0804 <br /> 2nduart r 1 <br /> Q e 998 Monitoring at S221-5 <br /> Second Quarter 1995 Groundwater Monitoring at <br /> Former Signal Oil Station Number 5221-5 <br /> 5431 West Grantline Road <br /> Banta, CA <br /> Monitoring Performed on May 26, 1995 <br /> i <br /> Groundwater Sampling Report 950526-K-1 <br /> This report covers the routine quarterly monitoring of groundwater wells at this Chevron facility <br /> Blaine Tech Services, Inc 's work at the site includes inspection, gauging, evacuation, <br /> purgewater containment, sample collection and sample handling in accordance with standard <br /> procedures that 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 /> Blaine Tech Services,Inc Report No 950526-K-1 2nd 0-1995 Monitoring at Signal Oil S221-5 <br />