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JtAJNA <br /> � Report Number: 42645 <br /> L t,<c Date .- 3/11/2005 <br /> Subject : 11 Water Samples <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <br /> P.O. Number : 3641-110 <br /> Case Narrative <br /> Hydrocarbons reported as TPH as Gasoline do not exhibit a typical Gasoline chromatographic pattern for <br /> sample SW-1. <br /> The Method Reporting Limit for Methanol has been increased due to the presence of an interfering <br /> compound for samples MW-5 and MW-6. <br /> Tert-Butanol results for sample MW-5 may be biased slightly high and are flagged with a V. 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 MtBE1Tert-Butanol in ratios <br /> of over 20:1. <br /> I <br /> i <br /> I <br /> i <br /> s <br /> Approved By: ` <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 J e Kiff <br />