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Report Number 24473 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 1/29/2002 <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 Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limst <br /> Benzene 24473-01 <0 50 400 400 451 437 ug/L EPA 8260B 112712002113 109 313 70-130 25 <br /> Toluene 24473-01 <0 50 400 400 455 443 ug/L EPA 82606 1127/2002114 111 278 70-130 25 <br /> Tert-Butanol 24473-01 <5 0 200 200 199 208 ug/L EPA 8260B 1127/200299 7 104 426 70-130 25 <br /> Methyl-t-Butyl Ether 24473-01 <0 50 400 400 448 46 1 ug/L EPA 8260E 1127/2002112 115 284 70-130 25 <br /> I <br /> I <br /> A �i <br /> KIFF ANALYTICAL, LLC Approved By Joel Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />