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Report Number: 34919 <br /> QC Report:Matrix Spike/Matrix Spike Duplicate Date: 9/19/2003 <br /> Project Name: 022-370 <br /> Project Number: 022-370 <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 34842-25 <1.0 20.0 20.0 19.6 19.2 mg/Kg M EPA 8015 9/17/03 98.2 96.3 1.92 60-140 25 <br /> Benzene 34919-03 <0.0050 0.0394 0.0401 0.0353 0.0363 mg/Kg EPA 8260B 9/16/03 89.6 90.7 1.19 70-130 25 <br /> Toluene 34919-03 <0.0050 0.0394 0.0401 0.0367 0.0368 mg/Kg EPA 8260B 9/16/03 93.2 91.8 1.43 70-1.30 25 <br /> Tert-Butanol 34919-03 <0.0050 0.197 0.200 0.195 0.196 mg/Kg EPA 8260B 9/16/03 98.9 98.1 0.792 70-130 25 <br /> Methyl4-Butyl Ether 34919-03 <0.0050 0.0394 0.0401 0.0373 0.0369 mg/Kg EPA 8260B 9/16/03 94.6 92.2 2.57 70-130 25 <br /> Benzene 34919-01 <0.0050 0.0400 0.0400 0.0361 0.0358 mg/Kg EPA 8260B 9/16/03 90.2 89.6 0.640 70-130 25 <br /> Toluene 34919-01 <0.0050 0.0400 0.0400 0.0317 0.0333 mg/Kg EPA 8260B 9/16/03 79.3 83.3 4.95 70-130 25 <br /> Tert-Butanol 34919-01 <0.0050 0.200 0.200 0.199 0.200 mg/Kg EPA 8260B 9/16/03 99.7 100 0.435 70-130 25 <br /> Methyl-t-Butyl Ether 34919-01 <0.0050 0.0400 0.0400 0.0377 0.0378 mg/Kg EPA 8260B 9/16/03 94.2 94.4 0.186 70-130 25 <br /> Approved By: J I / <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />