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�w <br /> Report:Groundwater-quality Monitoring—October 27,2004, 7500 West Eleventh Street, Tracy,CA. Page 16 <br /> Methyl-tertiary butyl ether EPA Method 8260B <br /> Di-isopropyl ether EPA Method 8260B <br /> f <br /> Ethyl tertiary-butyl ether. EPA Method 8260B <br /> Ili , <br /> E! tertiary-amyl methyl ether EPA Method 8260B <br /> E; <br /> I <br /> STL's laboratory is certified by the DHS to perform the groundwater analyses listed <br /> �4 <br /> ,s above. , <br /> 4.2 Results of Potable Water Sampling ' <br /> The results of the analyses of the water recovered from the six potable water supply wells i <br /> {4 are presented in Table 4. As was the case for the April and July 2004 monitoring rounds, <br /> none of the samples recovered on October 28, 2004 contained any detectable <br /> concentrations of analytes of concern. � <br /> 4.3 Notification to Well Owners 1 <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 /> i <br /> Analysis are also included in Appendix B of this report. <br /> '1 <br /> I' <br /> I <br /> I <br /> i <br /> SJC <br /> i <br />