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I <br /> Report Number 29822 <br /> QC Report Laboratory Control Sample(LCS) ©ate 11/20/2002 <br /> Project Name Haworth <br /> Project Number 3490 <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 11/19/02 104 70-130 <br /> Toluene 400 ug/L EPA 8260B 11/19/02 110 70-130 <br /> Tert-Butanol 200 ug/L EPA 82608 11/19/02 103 70-130 <br /> Methyl-t-Butyl Ether 400 ug/L EPA 8260B 11/19/02 101 70-130 <br /> 4f <br /> KIFF ANALYTICAL, LLC Approved By Joel Kiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 ' <br />