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Report Number 40233 <br /> QC Report Laboratory Control Sample (LCS) Date 9/28/2004 <br /> Project Name 7-Eleven Store#17334 <br /> Project Number 77EL 17334 04 <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov <br /> Parameter Level Units Method Analyzed Recov Limit <br /> Benzene 400 ug/L EPA 8260B 9123104 112 70-130 <br /> Toluene 400 ug/L EPA 8260B 9123104 111 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 9123104 105 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 9123104 112 70-130 <br /> Benzene 400 ug/L EPA 8260B 9124104 100 70-130 <br /> Toluene 400 uglL EPA 82608 9124104 100 70-130 <br /> Tert-Butanol 200 ug/L EPA 82608 9124104 955 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 9124/04 906 70-130 <br /> Benzene 400 ug/L EPA 8260B 9/27104 98 7 70-130 <br /> Toluene 400 ug/L EPA 8260B 9/27/04 983 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 9127104 921 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 82608 9/27/04 974 70-130 <br /> Benzene 400 ug/L EPA 8260B 9123/04 100 70-130 <br /> Toluene 400 ug/L EPA 8260B 9/23/04 98 7 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 9123/04 842 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260E 9/23/04 962 70-130 <br /> KIFF ANALYTICAL, LLC Approved By Jo Kiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />