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CM0001680 <br />0 Page 9 <br />3.4 Sampling Equipment and Procedures <br />One bottom material sample will be obtained from within each two-acre grid area. Samples will <br />be collected at each sampling location from ground surface to a maximum of 18 inches below <br />ground surface or until bedrock is encountered. A hand auger will be used to collect the samples. <br />At locations where bedrock is near ground surface and a hand auger is insufficient, a stainless <br />steel shovel and bowl will be used to collect the samples. <br />The minimum sample size needed for analyses is approximately 5.5 kg. If this sample size is <br />unavailable within a grid, no sample will be taken as the potential impact from the bottom <br />material in such a grid would be negligible. <br />After collection of each sample, the sampling equipment will be properly cleaned and <br />decontaminated before reuse or storage according to procedures outlined in Appendix B. Table 4 <br />lists required sample containers, sample volumes, and holding times. <br />3.5 Reservoir Bottom Material Analysis <br />The samples of bottom material will be analyzed for metals leachability, clay content, total <br />organic carbon, and total recoverable metals as summarized in Table 5. Fifty percent of the 30 <br />collected samples will be archived in case additional verification is required. Laboratory analysis <br />will be completed according to EPA's CLP standards (EPA, 1989). <br />Table 6 summarizes analytical procedures and reporting limits. Appendix C contains the Metals <br />Leachability method. <br />C02076 <br />???.? .. <br />PRIVILEGED AND CONFIDENTIAL <br />CVMQMC S%61G2-0O1u1I:610ZW1(&Wft, _ = r Environmental