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Extended Plume Definition:-7500 W 11th St.,Tracy,CA. Page 16 <br /> supplied by the laboratory containing, as applicable, pre-dispensed preservatives. The sample <br /> vials were then tightly closed, labeled for identification, entered into chain-of-custody control <br /> and packed on chemical ice for transport, within 24 hours,to STL's laboratory in Pleasanton, <br /> California. <br /> 4.10.4 Groundwater Sample Analyses ' <br /> Each groundwater water sample was analyzed for the following suite of analytes. <br /> Anal3qe Method of Analysis <br /> Total Petroleum Hydrocarbons EPA Method 8015M <br /> (quantified as Diesel) with pre-treatment by <br /> EPA Method 3630. <br /> Total Petroleum Hydrocarbons EPA Method 8260B <br /> �} (quantified as Gasoline) <br /> Benzene EPA Method 8260B <br /> Toluene EPA Method 8260B <br /> �. Ethylbenzene EPA Method 8260B <br /> Total Xylene Isomers EPA Method 8260B <br /> Tertiary-Butyl alcohol EPA Method 8260B <br /> Methyl-tertiary butyl ether EPA Method 8260B <br /> Di-isopropyl ether EPA Method 8260B <br /> Ethyl tertiary-butyl ether EPA Method 8260B <br /> Tertiary-amyl methyl ether EPA Method 8260B <br /> STL's laboratory is certified by the DHS to perform the groundwater analyses listed above. <br /> The results of the analyses of the samples of groundwater recovered in April 2004 are <br /> included in the Table 4. Copies of those Certificates are also included in Appendix C. <br /> sic <br />