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0 0 Report Number 460 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/4/2005 <br /> Project Name 7-Eleven Store #17334 <br /> Project Number 77EL 17334 05 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUD 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 46687-03 1100 200 200 1350 1340 ug/L EPA 8260B 1111105 140 137 270 70-130 25 <br /> i <br /> Methyl-t-Butyl Ether46687-03 14 400 400 460 467 uglL EPA 8260E 1111105 112 113 1 54 70-130 25 <br /> Approved By Jo iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />