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Report Number: 41493 <br /> QC Report : Laboratory Control Sample(LCS) Date : 12/2912004 <br /> Project Name : Beacon 3641 <br /> Project Number: 1641.18 <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov. <br /> Parameter Level Units Method Analyzed Recov. Limit <br /> Benzene 40.0 uglL EPA 8260B 12/17/04 96.6 70-130 <br /> Toluene 40.0 uglL EPA 82606 12/17/04 96.8 70-130 <br /> Tert-Butanol 200 uglL EPA 8260B 12/17/04 89.8 70-130 <br /> Methyl-t-Butyl Ether 40.0 uglL EPA 8260B 12/17/04 86.0 70-130 <br /> Benzene 40.0 uglL EPA 8260B 12/18/04 101 70-130 <br /> Toluene 40.0 uglL EPA 8260B 12/18/04 101 70-130 <br /> Tert-Butanol 200 uglL EPA 8260B 12/18/04 99.8 70-130 <br /> Methyl-t-Butyi Ether 40.0 uglL EPA 8260B 12/18104 103 70-130 <br /> Benzene 40.0 ug/L EPA 8260B 12/21104 93.0 70-130 <br /> Toluene 40.0 uglL EPA 8260B 12/21/04 100 70-130 <br /> Tert-Butanol 200 uglL EPA 82608 12/21/04 96.0 70-130 <br /> Methyl-t-Butyl Ether 40.0 uglL EPA 82606 12121/04 81.1 70-130 <br /> I <br /> Approved B Jo Kiff ' <br /> KIFF A`;' : YTICAL, LLC pp Y ' <br /> '770F Onrl C+ C.iifc'arin rlmxrie (`4 OCZR1r, r,'Z!n_')Q7_Annn <br />