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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 /> Benzene <br /> 71892-08 <0.50 40.6 40.6 37.1 36.6 ug/L EPA 8260B 2/10/10 91.4 90.2 1.42 80-120 25 <br /> Ethylbenzene <br /> 71892-08 <0.50 40.3 40.3 39.0 37.7 ug/L EPA 8260B 2/10/10 96.7 93.4 3.40 80-120 25 <br /> Methyl-t-butyl ether <br /> 71892-08 0.79 40.2 40.2 37.5 37.6 ug/L EPA 8260B 2/10/10 91.5 91.7 0.293 69.7-121 25 <br /> P + M Xylene <br /> 71892-08 <0.50 39.2 39.2 41.2 40.8 ug/L EPA 8260B 2/10/10 105 104 0.890 76.8-120 25 <br /> Tert-Butanol <br /> 71892-08 <5.0 199 199 193 195 ug/L EPA 8260B 2/10/10 96.9 97.8 0.956 80-120 25 <br /> Toluene <br /> 71892-08 <0.50 40.3 40.3 38.7 38.2 ug/L EPA 8260B 2/10/10 95.9 94.6 1.35 80-120 25 <br /> v <br /> CD <br /> N <br /> O <br /> O <br /> N <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />