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0 . Report Number 230 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/29/2001 <br /> Project Name 440 West Charter Way, <br /> Project Number 243-1399 <br /> I <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dur) 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 23413-01 <0 0050 0204 0 189 0 214 0 173 mg/Kg EPA 8260B 111191200105 91 7 135 70-130 25 <br /> Toluene 23413-01 <0 0050 0204 0 189 0207 0 166 mg/Kg EPA 82606 111191200102 881 143 70-130 25 <br /> Telt-Butanol 23413-01 <0 0050 1 02 0 943 0 986 0 787 mg/Kg EPA 8260B 11119/20096 6 834 146 70-130 25 <br /> M ethyl-t-B utyl Ether 23413-01 <0 0050 0204 0 189 0 217 0 176 mg/Kg EPA 8260B 111191200106 935 131 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 />