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Report Number: 41190 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 12/1/2004 <br /> Project Name : 2575 Country Club, <br /> Project Number: 0783 <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 41180-01 <0.0050 0.0641 0.0651 0.0635 0.0630 mg/Kg EPA 8260B 11/30/04 99.1 96.8 2.39 70-130 25 <br /> Toluene 41180-01 <0.0050 0.0641 0.0651 0.0664 0.0660 mg/Kg EPA 82608 11/30/04 104 101 2.18 70-130 25 <br /> Methyl-t-Butyl Ether41180-01 <0.0050 0.0641 0.0651 0.0546 0.0539 mg/Kg EPA 82608 11/30/04 85.2 82.8 2.97 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: Jo I <br /> iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />