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0 Report Number 24 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9/19/2001 <br /> F <br /> Project Name 1313 East Charter Way <br /> Project Number 243-1511 <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 21391-01 1 0 19 4 195 191 195 ug/L EPA 82608 71261200193 1 94 5 148 70-130 25 <br /> Toluene 21391-01 0 77 19 4 195 194 197 ug/L EPA 82608 71261200195 8 968 0 989 70-130 25 <br /> Tert-Butanol 21391-01 <5 0 970 976 901 92 2 ug/L EPA 82608 71261200192 9 94 4 161 70-130 25 <br /> Methyl-t-Butyl Ether 21391-01 5 3 194 195 228 234 ug/L EPA 8260E 712612001901 924 269 70-130 25 <br /> i <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />