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Report Number 24546 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 21512002 <br /> Project Name FOS <br /> Project Number 3490 <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 DI <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 24529-11 <0 50 395 392 379 402 uglL EPA 8260B 212/2002 959 103 678 70-130 25 <br /> Toluene 24529-11 <0 50 395 392 364 39 1 uglL EPA 8260B 2/212002 922 99 7 7 87 70-130 25 <br /> Tert-Butanol 24529-11 <5 0 198 196 196 203 ug/L EPA 8260E 212!2002 993 104 4 35 70-130 25 <br /> Methyl-t-Butyl Ether 24529-11 <0 50 39 5 39 2 357 360 ug/L EPA 8260B 2/2/2002 902 920 1 87 70-130 25 <br /> I <br /> I <br /> Approved By Joel Kiff Ifs <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive Suite D Davis CA 95616 530-297-4800 <br />