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Report Number 26 <br /> QC Report. Matrix Spike/Matrix Spike Duplicate Date 9/27/2002 <br /> - Project Name 7700 Moreland Street, <br /> Project Number 0953 I <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 Lima <br /> -Benzene 28769-01 <0 0050 00395 00391 00389 00379 mg/Kg EPA 8260B 9122102 984 969 1 59 70-130 25 <br /> -- Toluene 28769-01 <0 0050 00395 00391 00393 00383 mg/Kg EPA 82608 9122102 995 978 1 72 70-130 25 <br /> Tert-Butanol 28769-01 <0 0050 0 198 0 196 0 162 0 156 mg/Kg EPA 82603 9/22/02 820 79 6 2 99 70-130 25 <br /> _ Methyl-t-Butyl Ether 28769-01 <0 0050 00395 00391 00374 00347 mg/Kg EPA 8260B 9/22/02 94 7 886 663 70-130 25 <br /> t - _ <br /> ' <br /> _ KIFF ANALYTICAL, LLC Approved By J I Kiff � <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />