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Report Number: 35919 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 11/26/2003 <br /> Project Name : USA STATION <br /> Project Number: D003-008-1 <br /> Spiked <br /> Duplicate Spiked Spiked to Sample Relative <br /> Spike Spiked Spiked Sample SampleRelative 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 35919-01 <0.0050 0.0404 0.0398 0.0361 0.0350 mg/Kg EPA 8260B 11/25/03 89.2 87.9 1.52 70-130 25 <br /> Toluene 35919-01 <0.0050 0.0404 0.0398 0.0366 0.0356 mg/Kg EPA 8260B 11/25/03 90.5 89.4 1.17 70-130 25 <br /> Tert-Butanol 35919-01 <0.0050 0.202 0.199 0.183 0.173 mg/Kg EPA 82608 11/25/03 90.8 87.0 4.23 70-130 25 <br /> Methyl-t-Butyl Ether 35919-01 <0.0050 0.0404 0.0398 0.0343 0.0332 mg/Kg EPA 8260B 11/25/03 84.9 83.4 1.81 70-130 25 <br /> Approved By: Jo Kiff 11 <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />