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Voice 209 468-0337 Fax 209-468-3433 San Joaquin County <br /> Environmental Health <br /> Fax <br /> To: Alex Perez, Shell Oil From: Mary Meays, Senior REHS <br /> Fax: (510) 229-6042 Pages: 3 <br /> Phone: (510) 675-6168 Date: August 8, 1997 <br /> Re: Groundwater analysis CC: Joe Neely Fax: (707) 935-6649 <br /> ❑ Urgent ❑ For Review ❑ Please Comment ❑ Please Reply ❑ Please Recycle <br /> • Comments: <br /> Alex, <br /> As you are aware, oxygenates have been used in gasoline products throughout the state. <br /> The Central Valley Regional Water Quality Control Board in consultation with the Department <br /> of Health Services has issued a directive dated July 18, 1997 which requires the analysis of <br /> water samples using EPA Method 8260. The GC/MS scan should include at minimum the <br /> following oxygenates: Methanol, Ethanol, Tertiary Butanol, Methyl Tertiary Butyl Ether, Di- <br /> Isopropyl Ether (DIPE), Ethyl Tertiary Butyl Ether (ETBE), and Tertiary Amyl Methyl Ether <br /> (FAME). <br /> I have included a copy of the directive dated July 18, 1997 for your information. <br /> Until directed otherwise, all water samples collected shall undergo EPA Method 8260 analysis in <br /> addition to EPA Method 8020 and EPA Method 8015M analysis. <br /> If you have any questions, please do not hesitate to contact me. Thank you. <br />