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Report Number : 41089 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 11/22/2004 <br /> Project Name : 3011 West Benjamin Holt <br /> Project Number: 206-1015 <br /> Duplicate Spiked Spiked to Samp a 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 41088-01 <0.0050 0.0380 0.0392 0.0324 0.0346 mg/Kg EPA 82606 11/20/04 85.3 88.2 3.30 70-130 25 <br /> Toluene 41088-01 <0.0050 0.0380 0.0392 0.0322 0.0348 mg/Kg EPA 82606 11120/04 84.7 88.8 4.77 70-130 25 <br /> Methyl-t-Butyl Ether41088-01 <0.0050 0.0380 0.0392 0.0362 0.0372 mg/Kg EPA 82606 11/20/04 95.1 95.0 0.139 70-130 25 <br /> Approved By: Jo iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />