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Thomas O'Neill page 2 <br /> 800 E. Main St. <br /> sample per site which was positive for MTBE by EPA Method 8020A (or 8021 B) be <br /> analyzed by EPA Method 8240B (or 8260A) to verify that false positives are not <br /> occurring. It is recommended that confirmation analysis be performed for the <br /> sample containing the highest MTBE concentration from the site based on method <br /> 8020A (or 8021 B) values. <br /> i <br /> Although no response has been received from the Central Valley Regional Water <br /> Quality Control Board concerning the recent"solvent" referral made by PHS-EHD, I am <br /> relating to you the findings of the TRC now in hopes you will start the necessary steps <br /> for submitting a workplan in a timely manner that addresses the above noted concerns <br /> and recommendations. <br /> Please contact Michael Infurna at (209) 468-3454 should you wish to discuss your site <br /> or if you have any questions. <br /> Donna Heran, REHS, Director <br /> Environmental Health Division <br /> Mar arm La o, R S <br /> on <br /> Michael Infurna Jr., Senior REHS g 9 <br /> LOP/Site Mitigation Unit IV Supervisor <br /> MI/ <br /> i <br /> c: SWRCB - Ismael Jacobo <br /> c: CVRWQC13 - James Brathovde <br /> c: Attorney - Frank Enright, Diehl and Steinheimer, 400 E. Main St., Stockton <br /> i <br /> i <br /> i <br />{ <br />