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• <br /> Report Number 42561 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 3/7/2005 <br /> Project Name 7-Eleven Store#17334 <br /> Project Number 77EL.17334 05 <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 Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed Recov Recov Diff Limit Limit <br /> Tert-Butanol 42561-02 12 200 200 209 204 ug/L EPA 8260B 313105 985 961 246 70-130 25 <br /> Methyl-t-Butyl Ether42561-02 41 400 400 44 5 450 ug/L EPA 82606 313105 101 102 1 38 70-130 25 <br /> Approved By ,lo iff i <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />