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i <br /> Report Number 24608 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2/8/2002 <br /> Project Name FOS <br /> I <br /> Project Number 3490 <br /> Duplicate Spiked Spiked plicato Same a Relative <br /> Spike Spiked Spi.keo 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 /> Benzene 24588-01 <0 50 400 400 432 421 ugiL EPA 8260B 2/5/2002 108 105 2 51 70-130 25 <br /> Toluene 24588-01 <0 50 400 400 390 38 0 ug/L EPA 82606 2/5/2002 975 951 249 70-130 25 <br /> Tert-Butanol 24588-01 <50 200 200 190 192 ug/L EPA 8260E 2/5/2002 951 95 8 0 655 70-130 25 <br /> Methyl-t-Butyl Ether 24588-01 <0 50 400 400 477 476 ug/L EPA 8260E 215/2002 119 119 0 146 70-130 25 <br /> I <br /> I <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive SWse 0 i7ayss CA 95616 530-297-4800 <br /> : � <br />