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Report Number: 20385 <br /> QC Report: Matrix Spike/ Matrix Spike Duplicate Date : 6/14/2001 <br /> Project Name : 440 W.Charter Way, <br /> Project Number: 010517-H1 <br /> Duplicate Spiked Sulked to Sarre a 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 20399-06 X0.50 24.0 24.1 22.8 23.0 ug/L EPA 82608 51291200194.9 95.6 0.756 70-130 25 <br /> Toluene 20399-06 <0.50 24.0 24.1 20.3 20.5 ug/L EPA 8260B 51291200184.3 85.1 0.897 70-130 25 <br /> Tert-Butanol 20399-06 <5.0 24.0 24.1 23.1 23.9 ug/L EPA 82606 51291200196.2 99.3 3.19 70-130 25 <br /> Methyl-t-Butyl Ether 20399-06 <0.50 24.0 24.1 24.4 24.0 ug/L EPA 8260B 512912001101 99.6 1.71 70-130 25 <br /> ii <br /> E. <br /> t <br /> 7 <br /> 1 <br /> KIFF ANALYTICAL, LLC Approved By: J I Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> r <br />