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Report Number 469 <br /> QC Report Laboratory Control Sample (LCS) Date 1114/2005 <br /> Project Name 7-Eleven Store #19976 <br /> Project Number 77EL 19976.05 <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 10/31/05 101 70-130 <br /> Toluene 400 ug/L EPA 8260B 10/31/05 961 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 10/31/05 109 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 10/31/05 88 6 70-130 <br /> Benzene 400 ug/L EPA 8260B 1112105 101 70-130 <br /> Toluene 400 ug/L EPA 82606 1112105 105 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260E 1112105 106 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 1112/05 934 70-130 <br /> Benzene 400 ug/L EPA 8260B 10/31/05 940 70-130 <br /> Toluene 400 ug/L EPA 82606 10131/05 98 0 70-130 <br /> Tert-Butanol 200 ug/L EPA 82606 10/31/05 993 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 82606 10/31/05 89 2 70-130 <br /> KIFF ANALYTICAL, LLC Approved By Jo� Kiff <br /> 97Q5 9nrl Rt R mto qnn nervi¢ ('A Q5R1R ri4n-7Q7-ARnn <br />