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rt <br /> QC Report Matrix Spike/Matrix Spike Duplicate RepoNumber 2187$Date 9/1012001 <br /> Project Name 620 W Charter Way, <br /> Project Number 010816-U1 <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 21878-01 <0 50 189 194 170 182 ug/L EPA 8260B 81221200190 0 93 9 1119 70-130 25 <br /> Toluene 21878-01 <0 50 189 194 169 181 ug/L EPA 8260E 81221200189 4 935 443 70-130 25 <br /> Tert-Butanol 21878-01 <5 0 94 3 968 870 966 ug/L EPA 8260B 81221200192 2 998 7188 70-130 25 <br /> Methyl-t-Butyl Ether 21878-01 34 189 194 20 8 220 cg/L EPA 82608 81221200192 2 961 405 70-130 25 <br /> I <br /> I <br /> h <br /> Approved By J I Kiff J <br /> KIFF ANALYTICAL, LLC = <br /> 720 Olive Drill , Suite D Ok <br /> is, CA 95616 530-2974800 <br /> I <br />