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Report Number: 20 <br /> 4C Report. Laboratory Control Sample (LCS) Date : 7125102 <br /> Project Name : 3725 South Tracy <br /> Project Number: 020715-JK-1 <br /> LCS <br /> LCS Percent <br /> Spike Analysis Date Percent Recov. <br /> Parameter Level Units Method Analyzed Recov. Limit <br /> Benzene 20.0 ug/L EPA 8260B 7122102 98.8 70-130 <br /> Toluene 20.0 ug/L EPA 82608 7122102 94.8 70-130 <br /> Tert-Butanol 100 ug1L EPA 82608 7122102 94.8 70-130 <br /> Methyl-t-Butyl Ether 20.0 ug/L EPA 82608 7122102 100 70-130 <br /> Benzene 40.0 ug/L EPA 8260B 7123102 104 70-130 <br /> Toluene 40.0 ug/L EPA 8260B 7/23/02 99.9 70-130 <br /> Tert-Butanol 200 ug/L EPA 82606 7123102 103 70-130 <br /> Methyl-t-Butyl Ether 40.0 ug/L EPA 8260B 7123102 90.4 70-130 <br /> i <br /> KIFF ANALYTICAL, LLC Approved By: of Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> --- <br />