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' Report Number : 2C <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 5/21/2002 `' <br /> Project Name : 420 W. Kettleman Lane, <br /> Project Number: 020516-EB-2 <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 /> Benzene 26454-01 <0.50 40.0 40.0 37.4 37.4 ug/L EPA 82608 5119/02 93.4 93.5 0.0803 70-130 25 <br /> Toluene 26454-01 <0.50 40.0 40.0 38.1 37.8 ug/L EPA 8260E 5119102 95.3 94.4 0.896 70-130 25 <br /> Tert-Butanol 26454-01 <5.0 200 200 204 220 ug/L EPA 8260B 5119102 102 110 7.86 70-130 25 <br /> Methyl-t-Butyl Ether 26454-01 <0.50 40.0 40.0 36.9 37.5 ug/L EPA 8260B 5119102 92.3 93.6 1.45 70-130 25 <br /> KIFF ANALYTICAL,` LLC Approved By: J i Kiff <br /> 720 Olive Drive, Suite 0 Davis, CA 95616 530-297-4800 <br />