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Report Number: 40902 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 11/12/2004 <br /> Project Name : 2575 Country Club Blvd., <br /> Project Number: 206-0783-001 <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 40865-01 <0.50 40.0 40.0 36.5 35.6 ug/L EPA 82608 11/9/04 91.2 89.0 2.43 70-130 25 <br /> Toluene 40865-01 <0.50 40.0 40.0 36.8 36.2 ug/L EPA 8260B 11/9/04 92.1 90.5 1.79 70-130 25 <br /> Tert-Butanol 40865-01 <5.0 200 200 178 180 ug/L EPA 8260B 11/9/04 88.9 89.8 0.968 70-130 25 <br /> Methyl-t-Butyl Ether 40865-01 <0.50 40.0 40.0 37.0 36.3 ug/L EPA 8260B 11/9/04 92.5 90.6 2.03 70-130 25 <br /> Benzene 40883-04 <0.50 40.0 40.0 38.7 37.1 ug/L EPA 8260B 11/10/04 96.7 92.9 4.07 70-130 25 <br /> Toluene 40883-04 <0.50 40.0 40.0 37.4 36.5 ug/L EPA 8260B 11/10/04 93.6 91.2 2.62 70-130 25 <br /> Tert-Butanol 40883-04 15 200 200 200 200 ug/L EPA 82608 11/10/04 92.6 92.2 0.455 70-130 25 <br /> Methyl-t-Butyl Ether40883-04 87 40.0 40.0 136 137 ug/L EPA 82608 11/10/04 123 127 3.24 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: ,toe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />