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of product thickness will be verified using a disposable bailer. Up to three methods may be used <br /> for groundwater collection and these include the following. <br /> • Dedicated Teflon tubing with a single-ball, stainless steel check valve; or <br /> • A new disposable polyethylene or TeflonTM bailer, or stainless steel bailer; or <br /> • A peristaltic pump and new dedicated Teflon tubing. <br /> The groundwater grab samples will be labeled, packaged, and stored on ice in an insulated chest <br /> for transport under chain-of-custody manifest to a California-certified analytical laboratory. <br /> Groundwater sampling procedures are presented in Appendix A. <br /> 4.4 Laboratory Analyses <br /> The soil samples will be submitted to Creek Environmental Laboratories, a California-certified <br /> analytical laboratory, for analysis. The analyses will be conducted on a normal turnaround basis <br /> in general accordance with U.S. Environmental Protection Agency(EPA) specified holding <br /> times. The analyses will be performed in general accordance with the following EPA methods <br /> listed. <br /> Matrix Analyses <br /> Soil/water Gasoline Analysis Package EPA Method 8015/8020 <br /> Soil/water Total Petroleum Hydrocarbons as Diesel Modified EPA Method 8015 <br /> Soil/water Total Petroleum Hydrocarbons as Oil Modified EPA Method 8015 <br /> Soil/water Fuel Oxygenate Compounds EPA Method 8260B <br /> Soil/water Volatile Organic Compounds EPA Method 8260B <br /> Soil Organolead Title 22 CCR Division 4.5,Chap. 11,App.XI <br /> Soil Lead EPA 7000 Series <br /> Soil pH EPA Method 9045A <br /> Ten percent of samples will be analyzed for pH. <br /> Samples testing positive for methyl tertiary butyl ether(MTBE) with the gasoline analysis <br /> package will be further analyzed using EPA 8260B. <br /> Organolead will be run for all soil samples, with any positives additionally assessed using EPA <br /> 1 7000 Series for lead only. If lead is encountered in concentrations above background levels, <br /> EPA 8260B will be run in order to determine if any organic fraction is present. <br /> SAC/DP-N.ImncfpI 1ProjecW8318347601wkp1n&hsplwp&hsp HSAISR 120 HSA wp.doc 4-3 <br /> 4/19/02 <br />