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Report Number 18451 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 12/10/00 <br /> I <br /> Project Name 2494 Fremont Street <br /> Project Number <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 /> Spike Recovery Data <br /> Benzene 18451-04 <0 50 498 248 434 218 ug/L EPA 8260B 1212100 871 880 0 959 70-130 25 <br /> Toluene 18451-04 <0 50 498 248 454 227 ug/L EPA 8260B 1212100 91 2 914 0 175 70-130 25 <br /> Tert-Butanol 18451-04 <5 0 498 248 558 278 ug/L EPA 8260B 1212100 112 112 00357 70-130 25 <br /> Methyl-t-Butyl Ether 18451-04 31 498 248 45 9 262 ug/L EPA 8260B 1212100 859 929 778 70-130 25 <br /> Approved By Jjel Kiff <br /> KIFF ANALYTICAL, LLC f <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 v <br />