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Report Number: 32357 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 4/2/03 <br /> Project Name 404 West Fremont St. <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 32357-05 62 39.8 39.9 93.5 96.9 ug/L EPA 8260B 3/28/03 77.9 86.3 10.2 70-130 25 <br /> Toluene 32357-05 2.6 39.8 39.9 41.6 41.7 ug/L EPA 8260B 3/28/03 97.7 97.9 0.192 70-130 25 <br /> Tert-Butanol 32357-05 <5.0 199 200 196 194 ug/L EPA 8260B 3/28/03 98.7 97.4 1.32 70-130 25 <br /> Methyl-t-Butyl Ether 32357-05 <0.50 39.8 39.9 39.4 39.0 ug/L EPA 8260B 3/28/03 99.0 97.7 1.24 70-130 25 <br /> Benzene 32445-01 <0.50 40.0 40.0 40.8 40.1 ug/L EPA 8260B 4/1/03 102 100 1.85 70-130 , 25 <br /> Toluene 32445-01 <0.50 40.0 40.0. 39.8 39.6 ug/L EPA 8260B 4/1/03 99.6 99.0 0.579 70-130 25 <br /> Tert-Butanol 32445-01 <5.0 200 200 202 202 ug/L EPA 8260B 4/1/03 101 101 0.0198 70-130 25 <br /> Methyl-t-Butyl Ether 32445-01 <0.50 40.0 40.0. 42.9 44.2 ug/L EPA 8260B 4/1/03 107 110 2.82 .70-130 25 <br /> Benzene 32357-01 <0.50 40.0 40.0 46.0 45.1 ug/L EPA 8260B 3/25/03 115 113 1.95 70-130 25 <br /> Toluene 32357-01 <0.50 40.0 40.0 42.6 42.6 ug/L EPA 8260B 3/25/03 106 106 0.0470 70-130 25 <br /> .Tert-Butanol 32357-01. <5.0 , 200-- - 200 206 243 ug/L- - EPA 82606 3/25/03- -103 106 -3.47- 70-130 '25� <br /> Methyl-t-Butyl Ether 32357-01 <0.50 40.0 40.0 39.7 39.8 ug/L EPA 8260B. 3/25/03 99.3 99.6 0.352 70-130 25 <br /> Approved By: Joel Kiff <br /> KIFF ANALYTICAL, LLC ; I <br /> 2795 2nd St, Suite 301fvs, CA 95616 530-297-4800 <br /> vis, <br />