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Report Number: 41359 <br /> .....QC Report:Matrix Spike/Matrix Spike Duplicate- - -- - _ : ... Date: -12/9/2004-- <br /> Project Name : Shell Station <br /> Project Number: 246-0323-006 <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 41361-01 <0.0050 0.0371 0.0377 0.0381 0.0384 mg/Kg EPA 8260B 12/8/04 103 102 0.632 70-130 25 <br /> Toluene 41361-01 <0.0050 0.0371 0.0377 0.0358 0.0360 mg/Kg EPA 8260B 12/8/04 96.5 95.5 1.02 70-130 25 � <br /> Methyl-t-Butyl Ether41361-01 <0.0050 0.0371 0.0377 0.0321 0.0320 mg/Kg EPA 82608 12/8/04 86.6 85.1 1.71 70-130 25 <br /> Approved By: .toe iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br /> x.. <br />