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Report Number: 36001 <br /> QC Report : Matrix Spikel Matrix Spike Duplicate Date : 12/05/2003 <br /> Project Name : Former Beacon <br /> Project Number : 1474.46 <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 35994-01 <0.50 40.0 '40.0 40.5 39.4 uglL EPA 8260B 11/29/03 101 98.6 2.80 70-130 25 <br /> Toluene 35994-01 <0.50 40.0 40.0 40.2 39.2 uglL EPA 82608 11/29/03 100 98.0 2.59 70-130 25 <br /> Tert-Butanol 35994-01 <5.0 200 200 200 198 uglL EPA 8260B 11/29/03 99.8 99.1 0.638 70-130 25 <br /> Methyl-t-Butyl Ether 35994-01 5.5 40.0 40.0 39.6 38.8 uglL EPA 8260B 11/29/03 85.3 83.3 2.37 70-130 25 <br /> Approved By: I J <br /> r I <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />