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Report Number : 71859 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/11/2010 <br /> Project Name : 1 Q10 QMS - STTC <br /> Project Number : 185702192.200.0005 <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 /> 71859-19 <0.50 40.6 40.6 38.9 37.6 ug/L EPA 8260B 2/8/10 95.8 92.7 3.37 80-120 25 <br /> Ethyl-tert-butyl ether <br /> 71859-19 <0.50 39.9 39.9 39.9 39.9 ug/L EPA 8260B 2/8/10 100 100 0.0635 76.5-120 25 <br /> Ethylbenzene <br /> 71859-19 <0.50 40.3 40.3 42.1 41.1 ug/L EPA 8260B 2/8/10 104 102 2.28 80-120 25 <br /> Methanol <br /> 71859-19 <50 1000 1000 881 869 ug/L EPA 8260B 2/8/10 88.0 86.7 1.43 53.2-147 25 <br /> Methyl-t-butyl ether <br /> 71859-19 <0.50 40.2 40.2 39.4 38.4 ug/L EPA 8260B 2/8/10 98.0 95.6 2.46 69.7-121 25 <br /> P + M Xylene <br /> 71859-19 <0.50 39.2 39.2 42.0 41.0 ug/L EPA 8260B 2/8/10 107 104 2.50 76.8-120 25 <br /> Tert-Butanol <br /> 71859-19 <5.0 199 199 202 203 ug/L EPA 8260B 2/8/10 102 102 0.409 80-120 25 <br /> Toluene <br /> 71859-19 <0.50 40.3 40.3 39.4 38.5 ug/L EPA 8260B 2/8/10 97.8 95.5 2.35 80-120 25 <br /> Benzene <br /> 71887-03 <0.50 40.6 40.6 36.3 35.6 ug/L EPA 8260B 2/8/10 89.6 87.6 2.20 80-120 25 <br /> v <br /> cc <br /> CD <br /> w <br /> Cn <br /> 0 <br /> 41 <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />