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0 <br /> Report Number 43510 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 5/6/2005 <br /> Project Name 7-Eleven Store#14117 <br /> Project Number 77EL 14117 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Tert-Butanol 43510-08 52 200 200 244 244 ug/L EPA 8260B 512105 960 957 0 348 70-130 25 <br /> Methyl-t-Butyl Ether43510-08 1 8 400 400 408 41 0 ug1L EPA 82608 512105 977 980 0 290 70-130 25 <br /> I <br /> t <br /> KIFF ANALYTICAL, LLC Approved By .toeiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />