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4 4 Fluid-Level Monitoring and Ground Water Sampling <br /> The top of casing elevations for all monitoring wells were measured on January 4, 1992, by <br /> a California-registered surveyor. <br /> • On September 26, 1991, the depth to fluid in each well was measured as part of <br /> regular quarterly ground water monitoring and sampling Free product was noted in <br /> Monitoring Well MW-3. Survey data and fluid level measurements (i a depth to <br /> ground water, ground water elevation, free product thickness) are presented in <br /> Table 2 Ground water elevations are shown in Figure 5. <br /> • On December 10, 1991, regular quarterly ground water monitoring and sampling was <br /> performed, free product was noted in Monitoring Well MW-3 Ground water <br /> elevations are shown in Figure 6. Based on bonng logs and fluid-level measurements <br /> taken on December 10, 1991, two hydrogeologic cross sections were prepared and are <br /> shown in Figures 3 and 4 <br /> General field procedures for monitoring well sampling and field survey forms are presented <br /> in Appendix E <br /> 5.0 ANALYTICAL METHODS <br /> Analytical methods, chain of custody records, and official laboratory reports for both soil <br /> and ground water analysis are presented m Appendix F. <br /> Ground water samples for September and December 1991 sampling events, and soil <br /> samples, recovered and preserved for laboratory analysis,were analyzed using the following <br /> procedures <br /> • TPH-G using EPA Methods 5030/8015 <br /> • BTEX using EPA Methods 5030/8020 <br /> In accordance with the requirements of the SJCPHS, ground water samples from MW-5 and <br /> AMW-6 were additionally analyzed for the presence of fecal coliform by Standard <br /> Method 909-C <br /> The results of laboratory analysis of ground water samples are presented in Table 1 and <br /> Figures 7 and 8 The results of laboratory analysis of soil samples are presented in <br /> Table 2. <br /> 5 <br />