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`r-7 r-7 r--1 rel ;[- 1 r'-7 ! F i ' r-7- V7 rte! r-7, r-7 <br /> Report Number: 27600 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 7/26/2002 <br /> Project Name : 404 WEST FREMONT <br /> Project Number: 1628.10 <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 27591-03 64 114 114 168 167 ug/L EPA 8260B 7/22/02 91.7 90.7 1.07 70-130 25 <br /> Toluene 27591-03 46 114 114 146 144 ug/L EPA 8260B 7/22/02 87.4 85.4 2.28 70-130 25 <br /> Tert-Butanol 27591-03 9.7 571 571 538 535 ug/L EPA 82606 7/22/02 92.6 91.9 0.716 70-130 25 <br /> ethyl-t-Butyl Ether 27591-03 13 - 114 - 114 118 120 ug/L EPA 8260B 7/22/02 92.1 93.3 1.32 70-130 25 <br /> Benzene 27600-01 <0.50 40.0 40.0 41.5 40.5 ug/L EPA 8260B 7/23/02 104 101 2.58 70-130 25 <br /> Toluene 27600-01 <0.50 40.0 40.0 41.4 40.4 ug/L EPA 8260B 7/23/02 104 101 2.62 70-130 25 <br /> Tert-Butanol 27600-01 6.5 200 200 215 210 ug/L EPA 82608 7/23/02 104 102 2.25 70-130 25 <br /> Methyl-t-Butyl Ether 27600-01 1.6 40.0 40.0 44.5 45.3 ug/L EPA 8260B 7/23/02 107 109 1.82 70-130 25 <br /> ,�24-q <br /> Approved By: Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />