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09/05/2007 01:30 20953839 JL ANALY11CAL 0 IAUL U4/lb <br /> North Coast Laboratories. Ltd. Date: 23-Aug-2007 <br /> f <br /> CUENT: I L Analytical Services <br /> Project: 8-858 CASE NARRATIVE <br /> Lab Order: 0709352 <br /> TPH as Diesel: <br /> The surrogate-for sample 8-858 could not be quantified due to a sample dilution. <br /> BT X: were above <br /> The laboratory Control sample/laboratory control smapte duplicate(LCSILCSD) recoveries wex <br /> the upper acceptance-Hmit-for-MTBE and m,p-*y4ene. These recoveries indicate that the sample results <br /> for these analytes may be erroneously high. <br /> Sample 8-858 was reported as not detected(ND)with a dilution for. MTBE and benzene due to matrix <br /> interference. <br /> TPH as Gasoline: <br /> The gasoline value for sample 8-858 includes the re,ported gasoline components in addition to other <br /> peaks in the gasoline range. This sample also does not present a peak pattern consistent with that of <br /> gasoline. The peaks elute towards the end of the gasoline range. In OUT judgement the material appears <br /> to be a product heav'et 1haa_gasaline. Due to.the differences in the purging efficiency of these heavier <br /> materials the results may be variable. The reported result represents;the amount of material in the <br /> gasoline range. <br /> NORTH COAST LABORATORIES <br /> 5680 West End Road - Arclia,California 95521.9202 - 707-822-4649 - FAX 707-822-6831 <br />