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Report Number: 67192 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 02/06/2009 <br /> Project Name : 7-Eleven Store #14113 <br /> Project Number : 77EL.14113.28 <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 /> 1,2-Dichloroethane 67180-01 <0.50 40.2 40.3 42.7 42.4 ug/L EPA 8260B 2/5/09 106 105 0.836 70-130 25 <br /> Benzene 67180-01 <0.50 39.3 39.3 37.6 38.3 ug/L EPA 8260B 2/5/09 95.7 97.4 1.79 70-130 25 <br /> Methyl-t-butyl ether 67180-01 20 39.5 39.6 55.8 56.3 ug/L EPA 8260B 2/5/09 91.4 92.3 0.972 70-130 25 <br /> Tert-Butanol 67180-01 <5.0 200 200 202 207 ug/L EPA 8260B 2/5/09 101 103 2.32 70-130 25 <br /> Toluene 67180-01 <0.50 40.0 40.1 40.4 41.0 ug/L EPA 8260B 2/5109 101 102 1.30 70-130 25 <br /> 1,2-Dichloroethane 67179-05 <0.50 40.3 40.3 40.6 39.2 ug/L EPA 8260B 2/5/09 101 97.3 3.34 70-130 25 <br /> Benzene 67179-05 <0.50 39.3 39.3 38.3 36.5 ug/L EPA 8260B 2/5/09 97.4 92.8 4.86 70-130 25 <br /> Methyl-t-butyl ether 67179-05 <0.50 39.6 39.6 36.7 35.7 ug/L EPA 82608 2/5/09 92.6 90.2 2.59 70-130 25 <br /> Tert-Butanol 67179-05 <5.0 200 200 204 199 ug/L EPA 8260B 2/5/09 102 99.4 2.43 70-130 25 <br /> Toluene 67179-05 1.3 40.1 40.1 42.2 40.4 ug/L EPA 8260B 2/5/09 102 97.4 4.51 70-130 25 <br /> 1,2-Dichloroethane 67179-04 <0.50 40.3 40.3 43.6 42.2 ug/L EPA 8260B 2/5/09 108 104 3.30 70-130 25 <br /> Benzene 67179-04 <0.50 39.3 39.3 40.4 38.3 ug/L EPA 8260B 2/5/09 103 97.4 5.25 70-130 25 <br /> Methyl-t-butyl ether 67179-04 <0.50 39.6 39.6 43.5 41.9 ug/L EPA 8260B 2/5/09 110 106 3.72 70-130 25 <br /> Tert-Butanol 67179-04 <5.0 200 200 200 200 ug/L EPA 8260B 2/5/09 99.9 100 0.259 70-130 25 <br /> Toluene 67179-04 <0.50 40.1 40.1 42.9 40.8 ug/L EPA 8260B 2/5/09 107 102 4.94 70-130 25 <br /> TPH as Diesel BLANK <100 1000 1000 1020 973 ug/L M EPA 8015 2/5/09 102 97.3 5.20 70-130 25 <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 <br />