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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 /> Methyl-t-butyl ether <br /> 71887-03 <0.50 39.7 39.5 37.2 37.4 ug/L EPA 8260B 2/9/10 93.6 94.7 1.18 69.7-121 25 <br /> P + M Xylene <br /> 71887-03 <0.50 38.8 38.5 39.2 40.8 ug/L EPA 8260B 2/9/10 101 106 4.50 76.8-120 25 <br /> Tert-Butanol <br /> 71887-03 <5.0 197 196 187 190 ug/L EPA 8260B 2/9/10 94.8 97.2 2.52 80-120 25 <br /> Tert-amyl-methyl ether <br /> 71887-03 <0.50 40.3 40.1 38.0 38.2 ug/L EPA 8260B 2/9/10 94.1 95.3 1.25 78.9-120 25 <br /> Toluene <br /> 71887-03 <0.50 39.9 39.6 39.2 40.1 ug/L EPA 8260B 2/9/10 98.5 101 2.77 80-120 25 <br /> Benzene <br /> 71899-08 <0.50 39.5 40.4 38.5 39.4 ug/L EPA 8260B 2/10/10 97.3 97.6 0.244 80-120 25 <br /> P + M Xylene <br /> 71899-08 <0.50 38.2 39.1 40.1 40.8 ug/L EPA 8260B 2/10/10 105 104 0.423 76.8-120 25 <br /> Tert-Butanol <br /> 71899-08 <5.0 194 199 195 204 ug/L EPA 8260B 2/10/10 100 103 2.55 80-120 25 <br /> Benzene <br /> 71915-08 <0.50 40.2 40.6 39.4 39.5 ug/L EPA 8260B 2/11/10 97.8 97.3 0.506 80-120 25 <br /> v <br /> CD <br /> 41 <br /> Cn <br /> 0 <br /> rn <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />