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Report Number : 41093 <br /> QC Report : Matrix Spike/ Matrix spike Duplicate Date : 11/24/2004 <br /> Project Name : 3011 West Benjamin Holt <br /> Project Number : 206-1015 <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 /> TPH as Diesel 41090-01 <1.0 20.0 20.0 17.9 16.0 mg/Kg M EPA 8015 11/24/04 89.5 80.0 11.2 60-140 25 <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 11/20/04 84.7 88.8 4.77 70-130 25 <br /> Methyl-t-Butyl Ether 41088-01 <0.0050 0.0380 0.0392 0.0362 0.0372 mg/Kg EPA 82606 11120/04 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 />