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Report Number: 84839 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 05/17/2013 <br /> Project Name : Proposed 7-Eleven Store #36084 <br /> Project Number: 185750114.201.0400 <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 /> 84839-03 <0.0050 0.0380 0.0377 0.0351 0.0336 mg/Kg EPA 8260B 5/16/13 92.4 89.2 3.52 70.0-130 25 <br /> Ethylbenzene <br /> 84839-03 <0.0050 0.0380 0.0377 0.0364 0.0349 mg/Kg EPA 8260B 5/16/13 95.9 92.6 3.54 70.0-130 25 <br /> Methyl-t-butyl ether <br /> 84839-03 <0.0050 0.0374 0.0371 0.0388 0.0356 mg/Kg EPA 8260B 5/16/13 104 96.0 7.79 60.0-130 25 <br /> P + M Xylene <br /> 84839-03 <0.0050 0.0380 0.0377 0.0356 0.0338 mg/Kg EPA 8260B 5/16/13 93.9 89.8 4.52 70.0-130 25 <br /> Toluene <br /> 84839-03 <0.0050 0.0380 0.0377 0.0357 0.0344 mg/Kg EPA 8260B 5/16/13 94.1 91.4 2.84 70.0-130 25 <br /> • <br /> v <br /> CD <br /> CD <br /> 0 <br /> w <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />