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Report Number : 72439 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 03/31/2010 <br /> Project Name : HPI Pilot Study <br /> Project Number : 185702199.200.0003 <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 /> Ethylbenzene <br /> 72466-03 3.2 39.9 39.9 47.3 46.1 ug/L EPA 8260B 3/29/10 110 107 2.80 80-120 25 <br /> Methanol <br /> 72466-03 <50 1000 1000 698 652 ug/L EPA 8260B 3/29/10 69.8 65.2 6.83 53.2-147 25 <br /> Methyl-t-butyl ether <br /> 72466-03 0.50 40.1 40.1 32.8 32.6 ug/L EPA 8260B 3/29/10 80.6 80.1 0.642 69.7-121 25 <br /> P + M Xylene <br /> 72466-03 1.1 39.9 39.9 42.5 41.5 ug/L EPA 8260B 3/29/10 104 101 2.36 76.8-120 25 <br /> Tert-Butanol <br /> 72466-03 630 199 199 834 816 ug/L EPA 8260B 3/29/10 103 94.2 9.37 80-120 25 <br /> Tert-amyl-methyl ether <br /> 72466-03 <0.50 40.8 40.8 38.1 37.7 ug/L EPA 8260B 3/29/10 93.4 92.6 0.898 78.9-120 25 <br /> Toluene <br /> 72466-03 4.2 39.9 39.9 42.9 42.4 ug/L EPA 8260B 3/29/10 97.1 95.8 1.37 80-120 25 <br /> v <br /> m <br /> 0 <br /> w <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />