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Report Number: 21839 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 9/19/2001 <br /> Project Name : 440 W. Charter Way, <br /> Project Number: 010816-C1 <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 21839-01 350 40.0 40.0 376 359 ug/L EPA 8260B 81231200155.0 14.0 119 70-130 25 <br /> Toluene 21839-01 <0.50 40.0 40.0 33.9 34.0 ug/L EPA 82608 81231200184.8 85.1 0.412 70-130 25 <br /> Tert-Butanol 21839-01 69 200 200 246 245 ug/L EPA 8260E 81231200188.8 88.0 0.871 70-130 25 <br /> Methyl-t-Butyl Ether 21839-01 16 40.0 40.0 44.7 43.5 ug/L EPA 82606 81231200172.8 69.8 4.28 70-130 25 <br /> l <br /> i <br /> Approved By: Jiibl Kiff <br /> t KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />