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Report Number 40065 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 911712004 <br /> I I <br /> Protect Name 7-Eleven Store#21756 <br /> Protect Number 77EL 21756 04 <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 /> Benzene 40065-03 <0 50 400 400 408 39 8 ug/L EPA 8260B 9/16104 102 99 5 248 70-130 25 <br /> Toluene 40065-03 <0 50 400 400 451 446 ug/L EPA 8260E 9/16104 113 111 1 13 70-130 25 <br /> Tert-Butanol 40065-03 <50 200 200 205 198 ug/L EPA 82606 9/16104 103 99 2 342 70-130 25 <br /> Methyl-t-Butyl Ether 40065-03 <0 50 400 400 338 333 ug/L EPA 8260B 9116104 84 4 833 128 70-130 25 <br /> I <br /> I <br /> ` I <br /> Approved By Jo iff <br /> KIFF ANALYTICAL, LLC <br /> i <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br /> i <br />