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Report Number : 71892 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/12/2010 <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 /> Ethyl-tert-butyl ether <br /> 71942-10 <0.50 39.9 39.9 39.7 39.5 ug/L EPA 8260B 2/11/10 99.6 99.0 0.588 76.5-120 25 <br /> Ethylbenzene <br /> 71942-10 <0.50 40.3 40.3 41.5 40.5 ug/L EPA 8260B 2/11/10 103 100 2.50 80-120 25 <br /> Methanol <br /> 71942-10 <50 1000 1000 985 978 ug/L EPA 8260B 2/11/10 98.3 97.6 0.716 53.2-147 25 <br /> Methyl-t-butyl ether <br /> 71942-10 <0.50 40.2 40.2 38.2 36.7 ug/L EPA 8260B 2/11/10 95.0 91.4 3.92 69.7-121 25 <br /> P + M Xylene <br /> 71942-10 <0.50 39.2 39.2 41.6 39.9 ug/L EPA 8260B 2/11/10 106 102 4.15 76.8-120 25 <br /> Tert-Butanol <br /> 71942-10 <5.0 199 199 197 197 ug/L EPA 8260B 2/11/10 98.6 98.6 0.0626 80-120 25 <br /> Tert-amyl-methyl ether <br /> 71942-10 <0.50 40.8 40.8 38.9 38.4 ug/L EPA 8260B 2/11/10 95.2 94.1 1.16 78.9-120 25 <br /> Toluene <br /> 71942-10 <0.50 40.3 40.3 40.0 38.4 ug/L EPA 8260B 2/11/10 99.1 95.1 4.10 80-120 25 <br /> Benzene <br /> 71894-23 <0.50 40.6 40.6 39.8 39.4 ug/L EPA 8260B 2/10/10 98.2 97.1 1.17 80-120 25 <br /> v <br /> CD <br /> CO <br /> 0 <br /> N <br /> 0) <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />