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10 <br /> Report Number 45478 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 8/25/2005 <br /> Project Name 7-Eleven Store#19976 <br /> Project Number 77EL 19976 05 <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 /> Tert-Butanol 45456-05 <5 0 200 200 195 191 ug/L EPA 8260E 8124105 975 953 230 70-130 25 <br /> Methyl-t-Butyl Ether45456-05 <0 50 400 400 381 375 ug/L EPA 8260B 8124/05 954 937 176 70-130 25 <br /> 4 <br /> KIFF ANALYTICAL, LLC Approved By Jo iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br /> I <br />