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J(tAJNTALYT1CALLLC <br /> Report Number 40547 <br /> Date 12/21/2004 <br /> Subject 7 Water Samples <br /> Protect Name 7-Eleven Store#20632 <br /> Protect Number 77EL 20632 03 <br /> Case Narrative <br /> Matrix Spike/Matrix Spike Duplicate Results associated with samples MW-3, MW-5, MW-6 for the analyte <br /> Methyl-t-butyl ether were affected by the analyte concentrations already present in the un-spiked sample <br /> Analysis for sample MW-1 for'TPH as Gasoline'was affected by a short-term instrument contamination <br /> problem Normally,the sample would be re-analyzed, but the problem was not identified until after the <br /> hold time had expired It is likely that the actual concentration of'TPH as Gasoline'for sample MW-1 is '< <br /> 50 ug/L' <br /> Approved By <br /> J e Kiff <br /> 27952nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />