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f <br /> Report Number : 2306 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 11/12/2001 <br /> Project Name : 341 East Main Street, <br /> Project Number : 011025-K2 <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 23056-05 <0.50 40.0 40.0 44.9 43.7 ug/L EPA 82606 101301200112 109 2.69 70-130 25 <br /> Toluene 23056-05 0.88 40.0 40.0 49.7 48.6 ug/L EPA 8260B 101301200122 119 2.28 70-130 25 <br /> Tert-Butanol 23056-05 <5.0 200 200 218 214 ug/L EPA 8260B 10/301200109 107 1.81 70-130 25 <br /> Methyl-t-Butyl Ether 23056-05 <0.50 40.0 40.0 48.3 45.7 ug/L EPA 82606 101301200121 114 5.55 70-130 25 <br /> I I <br /> I <br /> I <br /> I I� <br /> Approved By: J ` I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />