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�. '! r-1 ["`�! r-7 r"'� i �[_`1 [�."�` r' ,7 49 <br /> Report Number: 23835 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date: 12/28/2001 <br /> Project Name : - 464 West Fremont <br /> Project Number: 1$28.10 <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 /> Benzene 23852-01 X0.50 20.2 . 19.3 20.8 20.2 ug/L EPA 8260B 121201200103 104 1.28 70-130 25 <br /> Toluene 23852-01 <0.50 20.2 19.3 20.3 19.7 ug/L EPA 8260E 121201200100 102 1.19 70-130 25 <br /> Tart-Butanol 23852-01 <5.0 101 96.7 99.8 97.4 ug/L EPA 82608 12120120098.8 101 1.96 70-130 25 <br /> Methyl-t-Butyl Ether 23852-01 1.4 20.2 19.3 24.6 24.1 ug/L EPA 8260B 121201200115 118 2.14 70-130 25_ <br /> II <br /> R° <br /> s <br /> KIFF ANALYTICAL, LLC Approved By: J i l Kiff <br /> 720 Olive Drive Suite D Davis,a s, CA 95616 530-2974800 <br />