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Report Number: 21211 <br /> QC Report : Matrix Spike/Matrix;Spike Duplicate Date : 7117101 <br /> Project Name : 341 E. Main Street, Ripon <br /> Project Number. 010710-K1 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. <br /> Parameter Sample Value Level Level Value Value Units Method Anal zed Recov. Recov. Diff. Limit Limit <br /> Spike Recovery Data <br /> Benzene 21211-01 <0.50 27.3 26.1 20.8 19.7 ug/L EPA 8260B 7115101 76.1 75.4 1.00 70-130 25 <br /> Toluene 21211-01 <0.50 27.3 26.1 21.6 20.3 ug/L EPA 8260B 7115101 79.1 77.8 1.56 70-130 25 <br /> Tert-Butanol 21211-01 <5.0 27.3 26.1 103 99.0 ug/L EPA 8260B 7115101 377 379 0.587 70-130 25 <br /> Methyl-t-Butyl Ether 2'1211-01 <0.50 27.3 26.1 22.4 22.7 ug/L EPA 8260B 7115101 82.0 87.0 5.96 70-130 25 <br /> � I <br /> Approved By: Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> i ' <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 V1 i <br /> � s s <br />