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Report Number : 54688 <br /> QC Report : Laboratory Control Sample(LCS) Date : 02/12/2007 <br /> Project Name : Unocal Op Unit <br /> Project Number: 6324.02 <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov. <br /> Parameter Level Units Method Analyzed Recov. Limit <br /> 1,1-Dichloroethane 40.0 ug/L EPA 8260B 2/6/07 95.9 70-130 <br /> Benzene 40.0 ug/L EPA 8260B 2/6/07 96.6 70-130 <br /> 1,2-Dichloroethane 40.0 ug/L EPA 8260B 2/6/07 91.5 70-130 <br /> Toluene 40.0 ug/L EPA 8260B 2/6/07 93.0 70-130 <br /> Chlorobenzene 40.0 ug/L EPA 8260B 2/6/07 101 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 2/6/07 90.9 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 8260B 2/6/07 106 70-130 <br /> 1,1-Dichloroethane 40.0 ug/L EPA 8260B 2/7/07 93.2 70-130 <br /> Benzene 40.0 ug/L EPA 8260B 2/7/07 95.6 70-130 <br /> 1,2-Dichloroethane 40.0 ug/L EPA 8260B 2/7/07 89.8 70-130 <br /> Toluene 40.0 ug/L EPA 8260B 2/7/07 94.1 70-130 <br /> Chlorobenzene 40.0 ug/L EPA 8260B 2/7/07 98.6 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 2/7/07 90.1 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 8260B 2/7/07 94.8 70-130 <br /> KIFF ANALYTICAL, LLC Approved By: J4 Kiff 11 <br /> 2795 2nd Street, Suite 300 Davis, CA 95618 530-297-4800 l <br /> 1 <br />