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Report Number 29853 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/25/2002 <br /> Project Name 2494 E Fremont St, <br /> Project Number 244-0797 <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 Anal ed Recov Recov Diff Limit Limit <br /> Benzene 29911-06 14 400 400 514 504 ug/L EPA 82606 11/24/02 940 914 2 88 70-130 25 <br /> Toluene 29911-06 22 400 400 408 400 ug/L EPA 8260E 11/24/02 96 5 94 6 194 70-130 25 <br /> Tert-Butanol 29911-06 <5 0 200 200 196 193 ug/L EPA 82608 11/24/02 983 964 187 70-130 25 <br /> Methyl-t-Butyl Ether 29911-06 5 6 400 400 465 45 7 ug/L EPA 8260B 11/24/02 102 100 203 70-130 25 <br /> i <br /> 1� <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />