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Report Number : 42986 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 3/29/2005 <br /> Project Name : 7700 Moreland Street, <br /> Project Number : 207-0953-001 <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 42986-01 <0.0050 0.0394 0.0387 0.0322 0.0320 mg/Kg EPA 8260B 3/25/05 81.7 82.8 1.32 70-130 25 <br /> Toluene 42986-01 <0.0050 0.0394 0.0387 0.0312 0.0311 mg/Kg EPA 8260B 3/25/05 79.1 80.5 1.69 70-130 25 <br /> Tert-Butanol 42986-01 <0.0050 0.197 0.193 0.138 0.138 mg/Kg EPA 8260B 3/25/05 70.2 71.6 1.95 70-130 25 <br /> Methyl-t-Butyl Ether 42986-01 <0.0050 0.0394 0.0387 0.0314 0.0311 mg/Kg EPA 82608 3/25/05 79.9 80.3 0.518 70-130 25 <br /> TPH as Diesel 42976-01 860 20.0 20.0 551 391 mg/Kg M EPA 8015 3/29/05 62.6 44.5 33.9 60-140 25 <br /> )94' <br /> KIFF ANALYTICAL, LLC Approved By: Joe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />