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Report Number : 71894 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/13/2010 <br /> Project Name : 1 Q10 QMS - STTC <br /> Project Number : 185702030.200.005 <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 /> Ethylbenzene <br /> 71894-23 <0.50 40.3 40.3 41.5 41.2 ug/L EPA 8260B 2/10/10 103 102 0.848 80-120 25 <br /> Methanol <br /> 71894-23 <50 1000 1000 978 1050 ug/L EPA 8260B 2/10/10 97.7 105 7.31 53.2-147 25 <br /> Methyl-t-butyl ether <br /> 71894-23 <0.50 40.2 40.2 41.1 40.8 ug/L EPA 8260B 2/10/10 102 102 0.652 69.7-121 25 <br /> P + M Xylene <br /> 71894-23 <0.50 39.2 39.2 39.3 38.9 ug/L EPA 8260B 2/10/10 100 99.1 1.12 76.8-120 25 <br /> Tert-Butanol <br /> 71894-23 <5.0 199 199 189 186 ug/L EPA 8260B 2/10/10 94.6 93.3 1.35 80-120 25 <br /> Tert-amyl-methyl ether <br /> 71894-23 <0.50 40.8 40.8 38.2 38.2 ug/L EPA 8260B 2/10/10 93.6 93.6 0.0157 78.9-120 25 <br /> Toluene <br /> 71894-23 <0.50 40.3 40.3 43.2 42.4 ug/L EPA 8260B 2/10/10 107 105 1.75 80-120 25 <br /> Benzene <br /> 71925-09 <0.50 40.6 40.6 38.6 36.9 ug/L EPA 8260B 2/10/10 95.0 91.0 4.34 80-120 25 <br /> Diisopropyl ether <br /> 71925-09 <0.50 39.5 39.5 40.4 39.4 ug/L EPA 8260B 2/10/10 102 99.8 2.64 80-120 25 <br /> v <br /> CD <br /> Cn <br /> N <br /> O <br /> 0) <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />