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Report Number: 31338 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 02/21/2003 <br /> Project Name : Delta #4509-T <br /> Project Number: <br /> Du plicate Duplicate Spiked <br /> P Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Spiked Sample <br /> ee ke ee Sample Sample Relative Percent Percent <br /> SameAnalysis l Percent Percent cent Rtv. iParameter Sample Value Lel Level Value Value Units MethdAnalyzed Reco . Recov. Diff. Limit Limit <br /> TPH as Diesel 31418-01 <1.0 20.0 20.0 17.2 16.6 mg/Kg M EPA 8015 2/11/03 86.2 82.8 3.93 60-140 25 1 <br /> TPH as Diesel Blank <50 1000 1000 862 849 ug/L M EPA 8015 2/9/03 86.2 84.9 1.47 70-130 25 <br /> Benzene 31338-04 <0.0050 0.0389 0.0395 0.0316 0.0322 mg/Kg EPA 8260B 2/11/03 81.3 81.4 0.154 70-130 25 <br /> Toluene 31338-04 <0.0050 0.0389 0.0395 0.0323 0.0327 mg/Kg EPA 8260B 2/11/03 83.0 82.8 0.271 70-130 25 <br /> Tert-Butanol 31338-04 <0.0050 0.194 0.198 0.153 0.152 mg/Kg EPA 8260B 2/11/03 78.5 76.9 2.14 70-130 25 <br /> Methyl-t-Butyl Ether 31338-04 <0.0050 0.0389 0.0395 0.0331 0.0331 mg/Kg EPA 8260B 2/11/03 85.2 83.7 1.75 70-130 25 <br /> Benzene 31460-01 <0.0050 0.0395 0.0394 0.0394 0.0396 mg/Kg EPA 8260B 2/13/03 99.8 100 0.600 70-130 25 <br /> Toluene 31460-01 <0.0050 0.0395 0.0394 0.0381 0.0383 mg/Kg EPA 8260B 2/13/03 96.4 97.0 0.620 70-130 25 <br /> Tert-Butanol 31460-01 <0.0050 0.198 0.197 0.180 0.182 mg/Kg EPA 8260B 2/13/03 91.1 92.1 1.16 70-130 25 <br /> Methyl-t-Butyl Ether 31460-01 <0.0050 0.0395 0.0394 0.0366 0.0369 mg/Kg EPA 8260B 2/13/03 92.7 93.5 0.913 70-130 25 <br /> Benzene 31411-07 <0.50 40.0 40.0 41.4 39.2 ug/L EPA 8260B 2/10/03 103 98.0 5.34 70-130 25 <br /> Toluene 31411-07 <0.50 40.0 40.0 40.5 38.5 ug/L EPA 8260B 2/10/03 101 96.2 5.04 70-130 25 <br /> Tert-Butanol 31411-07 <5.0 200 200 204 197 ug/L EPA 8260B 2/10/03 102 98.4 3.54 70-130 25 <br /> Methyl-t-Butyl Ether 31411-07 2.1 40.0 40.0 42.7 41.3 ug/L EPA 8260B 2/10/03 102 98.0 3.66 70-130 25 <br /> Benzene 31411-06 <0.50 40.0 40.0 39.2 37.4 ug/L EPA 8260B 2/12/03 97.9 93.5 4.60 70-130 25 <br /> Toluene 31411-06 <0.50 40.0 40.0 44.1 42.2 ug/L EPA 8260B 2/12/03 110 106 4.31 70-130 25 <br /> Tert-Butanol 31411-06 <5.0 200 200 184 208 ug/L EPA 8260B 2/12/03 92.1 104 12.1 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: J I Kiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />