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Report Number : 17860 <br /> QC Report : Matrix Spikel Matrix'Spike Duplicate Date : 09/2912000 <br /> Project Name : 347 E. MAIN ST., RIPON, <br /> Project Number: <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 17851-61 <0.50 24.2 24.6 22.3 22.7 uglL EPA 8260B 09/28/20091.9 92.5 0.586 70-130 25 <br /> Toluene 17851-6.1 <0.50 24.2 24.6 21.4 21.9 uglL EPA 8260B 09128120088. 4 89.0 0.744 70-130 25 <br /> Tert-Butanol 17851-61 <5.0 24.2 24.6 25.2 24.6 uglL EPA 8260E 091281200104 100 3.76 70-130 25 <br /> Methyl-t-Butyl Ether 17851-61 <0.50 24.2 24.6 21.0 21.0 uglL EPA 8260B 09/281200f 5 85.5 1.21 70-130 25 <br /> i <br /> Approved By: Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> i <br /> i720 Olive Drive, Suite *vis, CA 95616 530-297-4800 w <br />