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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 /> Toluene <br /> 71894-27 <0.50 40.3 40.3 41.3 40.8 ug/L EPA 8260B 2/10/10 102 101 1.14 80-120 25 <br /> Benzene <br /> 71894-24 18 40.6 40.6 56.9 55.6 ug/L EPA 8260B 2/10/10 95.7 92.4 3.51 80-120 25 <br /> Ethylbenzene <br /> 71894-24 7.2 40.3 40.3 48.8 49.1 ug/L EPA 8260B 2/10/10 103 104 0.829 80-120 25 <br /> Methyl-t-butyl ether <br /> 71894-24 1.8 40.2 40.2 43.9 42.8 ug/L EPA 8260B 2/10/10 105 102 2.65 69.7-121 25 <br /> P + M Xylene <br /> 71894-24 23 39.2 39.2 65.4 66.0 ug/L EPA 8260B 2/10/10 109 110 1.42 76.8-120 25 <br /> Tert-Butanol <br /> 71894-24 7.6 199 199 201 206 ug/L EPA 8260B 2/10/10 96.8 99.2 2.49 80-120 25 <br /> Toluene <br /> 71894-24 14 40.3 40.3 52.1 51.3 ug/L EPA 8260B 2/10/10 95.2 93.3 2.01 80-120 25 <br /> Benzene <br /> 71942-10 <0.50 40.6 40.6 38.4 37.2 ug/L EPA 8260B 2/11/10 94.6 91.8 2.98 80-120 25 <br /> Diisopropyl ether <br /> 71942-10 <0.50 39.5 39.5 39.8 39.8 ug/L EPA 8260B 2/11/10 101 101 0.0847 80-120 25 <br /> v <br /> CD <br /> 0 <br /> N <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />