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I <br /> Report Number 43074 <br /> QC Report Matrix Spike/Matrix Spike Duplicate i �� Date 04/04/2005 <br /> Project Name 4315 Waterloo Road, <br /> Project Number 207-1359-001, <br /> Duplicate _ Spiked <br /> Duplicate -, Spiked Spiked Sample Relative - <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Duo" Sample Sample Analysis Date Percent Percent Percent Recov Dsff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov` Recov Diff Limit Limit <br /> Benzene 42999-09 <0 0050 00397 00391 0 0415 00407 mg/Kg EPA 8260B 411105 104 104 0 418 70-130 _ 25 <br /> Toluene 42999-09 <0 0050 0 0397 0 0391 00400 00392 mg/Kg EPA 8260B 411105 101 100 0 563 70-130 25 _ <br /> Methyl-t-Butyl Ether42999-09 <0 0050 00397 - 00391 00380 00372 mg/Kg EPA 8260B 411105 959 950 '0 857 70-130 25 ; -- <br /> Benzene 43075-10 <0 0050 0 0386 0 0387I 0 0384 00382 mg/Kg EPA 8260B 412105 99 6 988 0 805 70-130- 25 - - <br /> Toluene 43075-10 <0 0050 00386 0 0387 10 0382 00382 mg/Kg EPA 8260B 412!05 98 8 987 0 189 70-130 25 <br /> 11 <br /> Methyl-t-Butyl Ether 43075-10 <0 0050 00386 00387 110 0377 00374 mg/Kg EPA 8260B 412105 976 966 0 972 70-130 25 <br /> I r <br /> I <br /> F F r <br /> i F <br /> E <br /> Y' <br /> - <br />- <br /> l KIFF ANALYTICAL, LLC Approved By Joe ,ff <br /> 2795 2nd Std, Suite 300 s, CA 95616 530-297-4800 C <br />