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_ Report Number 42985 <br /> QC Report Matrix Spike/Matrix Spike Duplicate R Date 03/28/2005 <br /> _- = -- Project Name 7700 Moreland Street, <br /> Project Number 207-0953-001 <br /> Siked <br /> - - Duplicate Spiked Spiked to 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 /> Benzene_ - 42956-02 <0 0050 00392- 00384 00372 00380 mg/Kg EPA 8260E 3125105 950 989 411 70-130 25 <br /> F Toluene 42956-02 <0 0050 00392 00384 00388 00396 mg/Kg EPA 8260E 3125105 989 103 414 70-130 25 <br /> Methyl-t-Butyl Ether 42956-02 <0 0050 00392 00384 00372 00380 mg/Kg EPA 82608 3125105 949 991 438 70-130 25 <br /> Approved By Joe iff <br /> KIFF ANALYTICAL, LLC <br /> - _ 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />