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Report Number : 43074 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 04/04/2005 <br /> Project Name : 4315 Waterloo Road, <br /> Project Number : 207-1359-001 <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 /> Benzene 42999-09 <0.0050 0.0397 0.0391 0.0415 0.0407 mg/Kg EPA 8260B 4/1/05 104 104 0.418 70-130 25 <br /> Toluene 42999-09 <0.0050 0.0397 0.0391 0.0400 0.0392 mg/Kg EPA 8260B 4/1/05 101 100 0.563 70-130 25 <br /> Methyl-t-Butyl Ether 42999-09 <0.0050 0.0397 0.0391 0.0380 0.0372 mg/Kg EPA 82606 4/1/05 95.9 95.0 0.857 70-130 25 <br /> Benzene 43075-10 <0.0050 0.0386 0.0387 0.0384 0.0382 mg/Kg EPA 8260B 4/2/05 99.6 98.8 0.805 70-130 25 <br /> Toluene 43075-10 <0.0050 0.0386 0.0387 0.0382 0.0382 mg/Kg EPA 8260B 4/2/05 98.8 98.7 0.189 70-130 25 <br /> Methyl-t-Butyl Ether43075-10 <0.0050 0.0386 0.0387 0.0377 0.0374 mg/Kg EPA 8260B 4/2/05 97.6 96.6 0.972 70-130 25 <br /> - )9 11 <br /> KIFF ANALYTICAL, LLC Approved By: Joe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />