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i <br /> Report Number: 20486 <br /> QC Report: Matrix Spike/Matrix'Spike Duplicate Date : 6/1912001 <br /> I <br /> Project Name : 341 East Main Street, <br /> Project Number: 243-0324 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> SpikeSpiked 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 /> Spike Recovery Data <br /> Benzene 20445-03 <0.50 23.9 24.3 25.1 25.6 ug/L EPA 82608 6/6/2001 105 105 0.418 70-130 25 <br /> Toluene 20445-03 <0.50 23.9 24.3 24.5 24.9 ug/L EPA 8260E 6/6/2001 103 102 0.195 70-130 25 <br /> Tert <br /> Butanol 20445-03 <5.0 23.9 24.3 28.9 28.4 ug/L EPA 82608 6/6/2001 1211 117 3.38 70-130 25 <br /> Methyl-t-Butyl Ether 20445-03 <0.50 23.9 24.3 25.5 26.1 ug/L EPA 8260E 6/6/2001 107 107 0.560 70-130 25 <br /> i <br /> i <br /> Approved By: J�el Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> s 0 ► <br />