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Report Number : 71859 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/11/2010 <br /> Project Name : 1 Q10 QMS - STTC <br /> Project Number : 185702192.200.0005 <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 <br /> 71859-20 41 40.6 40.6 75.4 76.2 ug/L EPA 8260B 2/8/10 84.7 86.9 2.51 80-120 25 <br /> Diisopropyl ether <br /> 71859-20 0.95 39.5 39.5 35.2 38.4 ug/L EPA 8260B 2/8/10 86.9 95.0 8.84 80-120 25 <br /> Ethyl-tert-butyl ether <br /> 71859-20 <0.50 39.9 39.9 33.3 36.5 ug/L EPA 8260B 2/8/10 83.6 91.5 9.07 76.5-120 25 <br /> Ethylbenzene <br /> 71859-20 <0.50 40.3 40.3 35.7 38.2 ug/L EPA 8260B 2/8/10 88.6 94.6 6.64 80-120 25 <br /> Methyl-t-butyl ether <br /> 71859-20 <0.50 40.2 40.2 31.4 34.5 ug/L EPA 8260B 2/8/10 78.0 85.9 9.59 69.7-121 25 <br /> O-Xylene <br /> 71859-20 2.2 40.4 40.4 39.4 42.0 ug/L EPA 8260B 2/8/10 92.3 98.5 6.54 79.7-120 25 <br /> P + M Xylene <br /> 71859-20 2.6 39.2 39.2 40.7 43.4 ug/L EPA 8260B 2/8/10 97.0 104 6.93 76.8-120 25 <br /> Tert-Butanol <br /> 71859-20 95 199 199 271 291 ug/L EPA 8260B 2/8/10 88.1 98.2 10.8 80-120 25 <br /> Tert-amyl-methyl ether <br /> 71859-20 <0.50 40.8 40.8 32.4 35.3 ug/L EPA 8260B 2/8/10 79.4 86.4 8.51 78.9-120 25 <br /> v <br /> CD <br /> w <br /> J <br /> 0 <br /> v, <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />