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Report Number: 25712 _ <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 4/4/2002 <br /> Project Name : 880 Victor Rd., Lodi <br /> Project Number: 244-0955-007 <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 /> TPH as Diesel 25676-19 3.7 20.0 20.0 18.8 19.0 mg/Kg M EPA 8015 4/2/02 79.4 80.0 0.774 60-140 25 <br /> Benzene 25712-01 <0.0050 0.0406 0.0406 0.0368 0.0371 mg/Kg EPA 8260B 4/3/02 90.8 91.4 0.686 70-130 25 <br /> Toluene 25712-01 <0.0050 0.0406 0.0406 0.0356 0.0350 mg/Kg EPA 8260B 4/3/02 87.8 86.2 1.75 70-130 25 <br /> Tert-Butanol 25712-01 <0.0050 0.203 0.203 0.177 0.173 mg/Kg EPA 8260B 4/3/02 87.2 85.5 1.89 70-130 25 <br /> Methyl-t-Butyl Ether 25712-01 <0.0050 0.0406 0.0406 0.0381 0.0384 mg/Kg EPA 8260B 4/3/02 93.8 94.6 0.849 70-130 25 <br /> Approved By: J ' I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />