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• • s <br /> Report Number: 19105 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 02/12/01 <br /> i <br /> Project Name : 1267 Country Club, <br /> Project Number: 018129-L2 <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 19120-04 91 24.1 24.6 107 109 ug1L EPA 8260B 02/09/01 67.0 73.3 9.08 70-130 25 <br /> Toluene 19120-04 25 24.1 24.6 44.5 45.6 ug/L EPA 82606 02/09/01 81.9 84.4 3.06 70-130 25 <br /> Tert-Butanol 19120-04 <5.0 24.1 24.6 39.4 39.8 ug/L EPA 8260B 02/09/01 164 162 1.38 70-130 25 <br /> Methyl-t-Butyl Ether 19120-04 0.56 24.1 24.6 21.2 22.1 ug1L EPA 8260B 02/09/01 85.7 87.8 2.36 70-130 25 <br /> i <br /> I � <br /> i <br /> Approved By: Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 v <br />