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� i ! <br /> Report Number: 20379 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 6!612001 <br /> Project Name . 620 W. Charter Way, <br /> Project Number : 010517-A2 <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 /> Spike Recovery Data <br /> Benzene 20364-01 <0.50 25.0 24.9 24.3 24.1 ug/L EPA 8260B 51301200197.2 96.6 0.557 70-130 25 <br /> Toluene 20364-01 <0.50 25.0 24.9 21.4 21.0 ug1L EPA 8260E 51301200185.9 84.3 1.81 70-130 25 <br /> Tert-Butanol 20364-01 <5.0 25.0 24.9 30.7 30.1 ug/L EPA 8260B 5/30/2001123 121 1.80 70-130 25 <br /> Methyl-t-Butyl Ether 20364-01 <0.50 25.0 24.9 25.6 27.4 ug/L EPA 8260B 5/3012001103 110 7.03 70-130 25 <br /> Approved By: J00I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 U <br />