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a <br /> 3i <br /> Report Number 24506 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2/1/2002 <br /> Project Name 4315 Waterloo Road, <br /> Project Number 020123-KF-2 <br /> t <br /> I <br /> Duplicate Spiked <br /> f Duplicate Spiked Spiked Sample Relative <br /> Spike' Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup I, Sample Sample Analysis Date Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level f, Value' Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 24509-01 <0 50 196 19 9 17 8 178 ug/L EPA 82608 1/30/2002910 897 146 70-130 25 <br /> Toluene 24509-01 <0 50 19 6 19 9I 17 8 177 ug/L EPA 8260B 1/30/2002912 89 0 247 70-130 25 <br /> Tert-Butanol 24509-01 26 978 99 3 116 111 ug/L EPA 8260B 1/30/2002919 85 8 683 70-130 25 <br /> Methyl-t-Butyl Ether 24509-01 60 196 199 737 75 5 ug/L EPA 8260E 11301200270 5 784 106 70-130 25 <br /> � I <br /> i <br /> f <br /> ' f - <br /> ; <br /> i <br /> if <br /> JIB ` <br /> 1 1j 'i t <br /> i <br /> II <br /> I +I <br /> a <br /> I _ <br /> l I, <br /> i. <br /> Approved By II Kiff <br /> KIFF AN ICAL, LLC <br /> 720 Olive Drilve, Suite vis, CA 95616 530-297800 • <br /> 'f a <br />