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0 . Report Number <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 11/20/2001 <br /> Protect Name 6131 Pacific Ave, Stockton <br /> Project Number 0854 <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 23227-16 <0 0050 00376 00392 00342 00348 mg/Kg EPA 8260B 11113120091 1 88 8 2 50 70-130 25 <br /> Toluene 23227-16 <0 0050 00376 00392 00347 00354 mg/Kg EPA 8260B 11113120092 2 902 225 70-130 25 <br /> Tert-Butanol 23227-16 <0 0050 0 188 0 196 0 149 0 147 mg/Kg EPA 8260B 11113120079 1 74 9 556 70-130 25 <br /> Methyl-t-Butyl Ether 23227-16 <0 0050 00376 00392 00373 00361 mg/Kg EPA 8260B 11113120099 2 920 753 70-130 25 <br /> I <br /> Approved By J ' I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> E <br />