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i <br /> Report Number 19646 <br /> QC Report Matrix Spike! Matrix Spike Duplicate Date 03/19/2001 <br /> Project Name 420 W. Kettleman Lane, <br /> Project Number 010316-02 <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 19587-03 1600 100 99 6 1300 1220 uglL EPA 82606 03/18/2000 00 000 000 70-130 25 <br /> Toluene 19587-03 100 100 996 189 168 ug/L EPA 82606 03118120086 8 661 270 70-130 25 <br /> Tert-Butanol 19587-03 66 100 99 6 161 147 uglL EPA 82606 03/18120094 9 80 9 159 70-130 25 <br /> Methyl-t-Butyl Ether 19587-03 91 100 996 194 201 ug/L EPA 82606 031181200103 111 7 31 70-130 25 <br /> Approved By J I Kill <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 <br />