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r <br /> Report Number : 22196 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date., 9/26/2001 <br /> I <br /> Project Name : STOCKTON <br /> Project Number: 1474.44 <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 22186-05 <0.50 18.8 19.6 20.2 20.6 ug/L EPA 8260E 9/20/2001108 105 2.07 70-130 25 <br /> Toluene 22186-05 <0.50 18.8 19.6 20.2 20.7 ug/L EPA 8260B 9/2012001108 106 1.57 70-130 25 <br /> Tert-Butanol 22186-05 200 94.1 97.9 311 306 ug/L. EPA 82608 912012001123 112 8.84 70-130 25 <br /> Methyl-t-Butyl Ether 22186-05 <0.50 18.8 19.6 20.2 20.6 ug/L EPA 8260B 9/2012001108 105 2.26 70-130 25 <br /> I i <br /> i <br /> i <br /> i <br /> I ,,p <br /> f� <br /> K1FF ANALYTICAL, LLC Approved By: J I Kiff <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-2974800 <br />