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Report Number:P 38850 <br /> ANALYTICAL Lix Date .- 6/25/2004 <br /> r <br /> __:-Subject : 4 Water Samples <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <br /> P.O. Number : 3641-106 <br /> Case Narrative <br /> Tert-Butanol results for sample VW-7 may be biased slightly high and are flagged with a U. A fraction of <br /> MtBE (typically less than 1%)converts to Tert-Butanol during the analysis of water samples. We consider <br /> this conversion effect to be mathematically significant in samples that contain MtBE/Tert-Butanol in ratios <br /> of over 20:1. <br /> The Method Reporting Limit for Methanol is increased due to interference from another compound for <br /> samples MW-2, MW-4 and VW-7. <br /> Approved 8y: <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 J e Kiff <br />