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Report Number : 21242 <br /> OC Report : Matrix Spike/Matrix Spike Duplicate Date : 8/22/2001 <br /> Project Name : 341 East Main Street, <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 /> I <br /> Benzene 21247-03 X0.50 19.4 19.7 19.0 19.1 ug/L EPA 8260B 71151200198.2 97.0 1.15 70-130 25 <br /> Toluene 21247-03 X0.50 19.4 19.7 17.2 17.1 ug/L EPA 8260B 7/15/200189.;1 86.8 2.64 70-130 25 <br /> Tert-Butanol 21247-03 X5.0 96.8 98.5 99.3 100 ug/L EPA 82608 7/1512001102 102 0.906 70-130 25 <br /> Methyl-t-Butyl Ether 21247-03 7.6 19.4 19.7 29.9 29.7 ug/L EPA 82606 7/15/2001115 112 2.76 70-130 25 <br /> I <br /> i <br /> I I <br /> i <br /> N.'1 <br /> Approved By: Joe] Kiff <br /> KIFF ANALYTICAL, LLC { <br /> 720 Olive Drive, Suite D CA 95616 530-297-4800 �� <br />