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Report Number : 75042 QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 10/26/2010 Project Name : Parcel #2A - 4Q10 Monitoring and Sampling Project Number : 211402828.300.250 Duplicate Spiked Duplicate Spiked Spiked Sample Relative Spike Spiked Spiked Sample Sample Relative Percent Percent Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov. Diff. Limit Limit Chloroethane 75002-16 <0.50 40.0 40.0 40.4 39.0 ug/L EPA 82606 10/21/10 101 97.5 3.51 70.0-130 25 Chloroform 75002-16 <0.50 40.0 40.0 39.3 39.2 ug/L EPA 82606 10/21/10 98.3 97.9 0.367 80.0-120 25 Chloromethane 75002-16 <0.50 40.0 40.0 42.4 41.6 ug/L EPA 82606 10/21/10 106 104 1.93 45.9-142 25 Dibromochloromethane 75002-16 <0.50 40.0 40.0 40.9 41.1 ug/L EPA 82606 10/21/10 102 103 0.342 70.0-130 25 Dibromomethane 75002-16 <0.50 40.0 40.0 39.9 40.4 ug/L EPA 82606 10/21/10 99.7 101 1.23 70.0-130 25 Dichlorodifluoromethane 75002-16 <0.50 40.0 40.0 41.1 40.4 ug/L EPA 82606 10/21/10 103 101 1.63 47.4-151 25 Diisopropyl ether 75002-16 <0.50 40.1 40.1 38.4 38.4 ug/L EPA 82606 10/21/10 95.7 95.6 0.0898 80-120 25 Ethyl-tert-butyl ether 75002-16 <0.50 40.1 40.1 38.6 38.7 ug/L EPA 82606 10/21/10 96.5 96.7 0.251 76.5-120 25 Ethylbenzene 75002-16 <0.50 40.0 40.0 39.4 39.3 ug/L EPA 82606 10/21/10 98.5 98.2 0.323 80-120 25 Hexachlorobutadiene 75002-16 <0.50 40.0 40.0 38.1 38.7 ug/L EPA 82606 10/21/10 95.2 96.8 1.76 70.0-130 25 v co N Cn O 0) CO KIFF ANALYTICAL, LLC 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800