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P <br /> Report Number: 20946 <br /> I <br /> QC Report: Matrix:'apikel Matrix Spike Duplicate Date : 7/11/2001 <br /> w <br /> Project Name : 341 East Street, Ripon, <br /> Project Number, 243-0324 <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 Analyzed Recov. Recov. Diff. Limit Limit <br /> Spike Recovery Data <br /> Benzene 20937-04 <0.50 19.3 19.7 16.7 17.4 uglL EPA 8260E 61301200186.6 88.1 1.72 70-130 25 <br /> Toluene :20937-04 <0.50 19.3 19.7 17.8 18.1 uglL EPA 82606 61301200192.6 91.8 0.976 70-130 25 <br /> Tert-Butanol 20937-04 <5.0 96.3 98.6 87.6 89.4 uglL EPA 82606 61301200191.0 90.7 0.330 70-130 25 <br /> Methyl-t-Butyl Ether 20937-04 67 19.3 19.7 68.4 68.0 uglL EPA 8260B 6130120017.22 4.61 44.0 70-130 25 <br /> I <br /> I <br /> I <br /> I I <br /> Approved By: J e! Kiff <br /> KIFF ANALYTICAL_, LLC U 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />