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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 /> Benzene <br /> 71942-05 <0.50 40.6 40.6 39.8 39.3 ug/L EPA 8260B 2/12/10 98.2 96.8 1.42 80-120 25 <br /> Diisopropyl ether <br /> 71942-05 <0.50 39.5 39.5 41.9 41.8 ug/L EPA 8260B 2/12/10 106 106 0.121 80-120 25 <br /> Ethanol <br /> 71942-05 <5.0 100 100 99.8 110 ug/L EPA 8260B 2/12/10 99.5 109 9.47 55.1-159 25 <br /> Ethyl-tert-butyl ether <br /> 71942-05 <0.50 39.9 39.9 39.9 40.4 ug/L EPA 8260B 2/12/10 100 101 1.09 76.5-120 25 <br /> Ethylbenzene <br /> 71942-05 <0.50 40.3 40.3 42.4 41.4 ug/L EPA 8260B 2/12/10 105 103 2.18 80-120 25 <br /> Methanol <br /> 71942-05 53 1000 1000 1120 1170 ug/L EPA 8260B 2/12/10 106 111 4.27 53.2-147 25 <br /> Methyl-t-butyl ether <br /> 71942-05 18 40.2 40.2 59.0 59.4 ug/L EPA 8260B 2/12/10 101 102 0.824 69.7-121 25 <br /> P + M Xylene <br /> 71942-05 <0.50 39.2 39.2 40.0 38.8 ug/L EPA 8260B 2/12/10 102 98.8 3.19 76.8-120 25 <br /> Tert-Butanol <br /> 71942-05 <5.0 199 199 190 189 ug/L EPA 8260B 2/12/10 95.2 94.8 0.384 80-120 25 <br /> v <br /> CD <br /> Cn <br /> Cn <br /> 0 <br /> rn <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />