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Report Number 23511 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/30/2001 <br /> Project Name 420 W. Kettleman Lane, <br /> Pro)ect Number 011119-SO-1 <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 23509-03 <0 50 184 197 186 19 6 ug/L EPA 82608 111271200102 997 179 70-130 25 <br /> Toluene 23509-03 <0 50 184 197 188 198 ug/L EPA 82608 111271200102 100 180 70-130 25 <br /> Tert-Butanol 23509-03 <5 0 91 8 985 986 107 ug/L EPA 8260B 111271200107 109 156 70-130 25 <br /> Methyl-t-Butyl Ether 23509-03 <0 50 18 4 197 166 174 ug/L EPA 8260B 11127120090 3 88 6 1 93 70-130 25 <br /> I <br /> I <br /> KIFF ANALYTICAL, LLC Approved By J I Kiff <br /> 720 Olive Drive, Suite D&is, CA 95616 530-297-4800 . <br />