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North Coast Laboratories, Ltd. Date: 23-Aug-2007 <br /> CLIENT: J L Analytical Services <br /> Project: 8-859 CASE NARRATIVE <br /> Lab Order: 0708353 s/ <br /> TPH as Diesel: <br /> The surrogate for sample 8-859 could not be quantified due to a sample dilution. <br /> BTEX: <br /> The laboratory control sample/laboratory control sample duplicate (LCS/LCSD) recoveries were above <br /> the upper acceptance limit for MTBE and m,p-xylene. These recoveries indicate that the sample results <br /> for these analytes may be erroneously high. <br /> TPH as Gasoline: <br /> The gasoline value for sample 8-859 includes the reported 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 our judgement the material appears <br /> to be a product heavier than gasoline. 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 /> 1 <br /> NORTH COAST LABORATORIES <br /> 5680 West End Road - Arcata, California 95521-9202 - 707-822-4649 - FAX 707-8226831 <br /> C J P--t -R e Pa <br /> ec c per <br />