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Report Number 40612 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 1012112004 <br /> Project Name Sanchez Property <br /> Project Number <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Sp ke 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 40622-12 <50 200 200 202 202 ug/L EPA 8260E 10/19/04 101 101 0202 70-130 25 <br /> Methyl-t-Butyl Ether40622-12 22 400 400 446 445 ug/L EPA 8260E 10119/04 106 106 0 299 70-130 25 <br /> I <br /> Benzene 40318-04 <0 50 400 400 395 385 uglL EPA 6260E 10/19/04 98 8 962 2 57 70-130 25 <br /> Toluene 40318-04 <0 50 400 400 396 384 uglL EPA 82606 10/19/04 989 960 2 91 70-130 25 <br /> Tert-Butanol 40318-04 <50 200 200 200 196 uglL EPA B260B 10/19/04 100 981 1 96 70-130 25 <br /> Methyl-t-Butyl Ether 40318-04 <0 50 400 400 391 373 uglL EPA 82606 10/19/04 979 933 474 70-130 25 <br /> i <br /> I <br /> F <br /> Approved By ,joe iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />