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i <br /> Report Number. 30259 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 12/17/2002 <br /> Project Name : Former Beacon #12474 <br /> Project Number: 1474.45 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Du Sample Sample - Analysis Date Percent Percent Percent Recov. Diff. <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov. Diff. Limit Limit <br /> Tert-Butanol 30247-01 <5.0 200 200 200 195 uglL EPA 82606 12/13/02 100 97.3 2.79 70-130 25 <br /> Methyl-t-Butyl Ether 30247-01 17 40.0 40.0 52.8 49.8 ug/L EPA 82606 12/13/02 90.3 82.8 8.75 70-130 25 <br /> Benzene 30297-03 <0.50 40.0 40.0 37.5 37.7 ug/L EPA 82606 12/13/02 93.8 94.2 0.372 70-130 25 <br /> Toluene 30297-03 <0.50 40.0 40.0 37.8 37.8 ug/L EPA 8260B 12/13/02 94.5 94.6 0.0529 70-130 25 <br /> Tert-Butanol 30297-03 9.0 200 200 183 185 ug/L EPA 82606 12/13/02 87.1 88.0 1.08 70-130 25 <br /> Methyl-t-Butyl Ether 30297-03 <0.50 40.0 40.0 37.2 37.3 ug/L EPA 82606 12/13102 93.0 93.3 0.295 70-130 25 <br /> i <br /> ff <br /> KIFF ANALYTICAL, LLC Approved By: Joel Ki <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800'." U <br />