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------------------ <br /> Evaluation of Natural Attenuation: 7500 West Eleventh Street, Tracy, CA. Page 20 <br /> F <br /> Methyl-tertiary butyl ether EPA Method 8260B <br /> Di-isopropyl ether EPA Method 8260B <br /> Ethyl tertiary-butyl ether EPA Method 8260B <br /> ; i <br /> Tertiary-amyl methyl ether EPA Method 8260B <br /> �.' 1,2 Dichloroethane EPA Method 8260B <br /> c. : Ethylene Dibromide EPA Method 8260B <br /> Ethanol EPA Method 8260B <br /> Methanol EPA Method 8015M <br /> STL's laboratory is certified by the DHS to perform the groundwater analyses listed <br /> above. <br /> :. Copies of the laboratory Certificates of Analysis generated from the February 2005 <br /> sampling round are included in Appendix C of this report. <br /> .~: 5.2 Results of Potable Water Sampling <br /> The results of the analyses of the water recovered from the six potable water supply wells <br /> E l are presented in Table 4. As was the case for the April, July and October 2004 monitoring <br /> rounds, none of the samples recovered on February 25, 2005 contained any detectable <br /> concentrations of analytes of concern. <br /> 5.3 Notification to Well Owners <br /> Following receipt of the analyses of samples recovered from the water supply wells, SJC <br /> notified each well owner of the results by means of a written communication, which <br /> included copies of the applicable Certificates of Analysis. Copies of those Certificates of <br /> Analysis are also included in Appendix C of this report. <br /> F <br /> -,J <br /> SJC <br /> l <br />