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JrtA4NA&17LYT1CAL ,LLC <br /> Report Number: 34919 <br /> Date: 9/19/2003 <br /> Subject: 11 Soil Samples <br /> Project Name: 022-370 <br /> Project Number: -"022-370 <br /> Case Narrative <br /> Tert-Butanol results for sample S-7-T1 may be biased slightly high and are flagged with a V.A fraction of <br /> MtBE(up to 5%)converts to Tert-Butanol during the analysis of soil samples.We consider this <br /> conversion effect to'be mathematically significant in samples that contain MtBE/Tert-Butanol in ratios of <br /> over 3:1.Hydrocarbons reported as TPH as Motor Oil do not exhibit atypical Motor Oil chromatographic <br /> pattern for sample SP1.a-d. Hydrocarbons reported as TPH as Diesel do not exhibit a typical Diesel <br /> chromatographic pattern for sample S-7-T1. <br /> Approved By: <br /> i J I 1 <br /> 2795 2nd St, Suite 300.Davis,CA 95616 530-297-4800 <br />