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Jimco Truck Plaza i I <br /> Page 2 of 2 <br /> I <br /> . i <br /> 1 <br /> EHD does not consider the analysis of methyl tertiary butyl ether(MTBE) by <br /> Environmental Protection Agency(EPA) SW-846 Method 8021B to be a reliable method. <br /> Instead, EHD recommends EPA SW-846 Method 8260B for the analysis of MTBE. Also <br /> continue collecting depth-to-water measurements in all wells during each quarterly <br /> groundwater monitoring event for the purpose of determining the groundwater gradient. <br /> If you have any questions you may contact Vicki McCartney at (209) 468-3456 or by <br /> electronic mail at vmccartney(csjcehd.com. <br /> Donna Heran, RENS, Director , <br /> Environmental Health Department / <br /> f-c�toena L. McCartney, Senior REHS Nuel C. Henderson, Jr., RG j <br /> LOP/Site Mitigation Unit IV LOP/Site Mitigation Unit l ' <br /> c: Eugene Pak, Cambria Environmental Technology, Inc. <br /> James L.L. Barton, CVRWQCB <br />