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Report Number 23243 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/16/2001 <br /> Project Name STEFANOS <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 23243-01 <0 50 194 189 186 186 ug/L EPA 82606 11110120095 7 983 273 70-130 25 <br /> Toluene 23243-01 <0 50 19 4 189 188 18 8 ug/L EPA 82606 11110120096 6 996 303 70-130 25 <br /> Tert-Butanol 23243-01 <5 0 972 94 6 99 9 101 ug/L EPA 8260B 111101200103 106 360 70-130 25 <br /> Methyl-t-Butyl Ether 23243-01 <0 50 194 189 160 161 ug/L EPA 82606 11/10120082 6 851 292 70-130 25 <br /> Approved By J el Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />