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Report Number 41207 <br /> QC Report Matrix Sp�kel Matrix Spike Duplicate Date 12/6/2004 <br /> I <br /> Project Name FREMONT QUIK STOP <br /> Project Number 7039.16 <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 /> Benzene 41200-07 1 8 4��0 400 430 425 uglL EPA 82606 1212104 103 102 1 29 70-130 25 <br /> Toluene 41200-07 <0 50 4d 0 400 406 398 ug/L EPA 8260B 1212104 102 996 199 70-130 25 <br /> Tert-Butanol 41200-07 31 2011 0 200 228 238 ug/L EPA 8260B 1212104 98 3 103 510 70-130 25 <br /> Methyl-t-Butyl Ether 41200-07 280 40 0 400 310 270 uglL EPA 8260B 1212104 802 000 200 70-130 25 <br /> I <br /> I <br /> i <br /> Approved By Joe iff <br /> KIFF AN TICAL, LLC <br /> 2795 2nd St Suite 300 avis, CA 95616 530-297-4800 <br />