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• • Report Number 190 <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 04/05/2001 <br /> Project Name 4315 Waterloo Road, <br /> Project Number 203-1359 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUE) 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 19811-09 <0 0050 00500 00497 00479 00457 mg/Kg EPA 8260B 04101120095 7 920 3 96 70-130 25 <br /> Toluene 19811-09 <0 0050 00500 00497 00425 00414 mg/Kg EPA 8260B 04101/20085 1 833 216 70-130 25 <br /> Tert-Butanol 19811-09 <0 0050 00500 00497 00527 00583 mg/Kg EPA 8260B 04/01/200105 117 108 70-130 25 <br /> Methyl-t-Butyl Ether 19811-09 <0 0050 00500 00497 00551 00547 mg/Kg EPA 82608 04101/200110 110 00727 70-130 25 <br /> Approved By J 1 I Koff <br /> KIFF ANALYTICAL, LLC �� <br />