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4 <br /> Report Number 31284 <br /> QC Report Laboratory Control Sample(LCS) -� Date 2/4/2003 <br /> Project Name Beacon Station 3641 <br /> Protect Number 1641 16 <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 82608 213103 964 70-130 <br /> Toluene 400 ug/L EPA 8260B 213103 106 70-130 <br /> Tert-Butanol 200 ug/L EPA 8260B 213103 986 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260E 2/3/03 103 70-130 <br /> KIFF ANALYTICAL, LLC Approved By ,Joel Kiff <br /> 2795 2nd St Suite 300 Davis, CA 95616 530-297-4800 J <br />