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Report Number: 32962 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 5/8/2003 <br /> Project Name : SINGH - TRACY <br /> Project Number: 3254 <br /> Duplicate Duplicate Spiked <br /> Du <br /> P Spiked Spiked Sample Relative <br /> SpikeSpiked 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 32941-05 130 40.0 40.0 179 173 ug/L EPA 8260B 514103 110 96.3 13.3 70-130 25 <br /> Toluene 32941-05 1.8 40.0 40.0 42.8 40.7 ug/L EPA 8260E 514103 102 97.2 5.19 70-130 25 <br /> Tert-Butanol 32941-05 11 200 200 205 202 ug/L EPA 8260B 5/4/03 96.9 95.6 1.42 70-130 25 <br /> Methyl-t-Butyl Ether 32941-05 7.0 40.0 40.0 45.3 42.2 ug/L EPA 8260B 514103 95.7 88.0 8.38 70-130 25 <br /> Benzene 32950-01 <0.50 40.0 40.0 41.1 40.1 ug/L EPA 82608 515103 103 100 2.46 70-130 25 <br /> Toluene 32950-01 <0.50 40.0 40.0 37.0 37.5 ug/L EPA 82608 515103 92.6 93.7 1.13 70-130 25 <br /> Tert-Butanol 32950-01 <5.0 200 200 196 224 ug/L EPA 8260B 515/03 98.0 112 13.3 70-130 25 <br /> Methyl-t-Butyl Ether 32950-01 <0.50 40.0 40.0 38.0 37.5 ug/L EPA 8260B 515103 95.1 93.7 1.48 70-130 25 <br /> Benzene 32961-04 <0.50 40.0 40.0 40.0 39.9 ug/L EPA 82608 512103 99.9 99.8 0.150 70-130 25 <br /> Toluene 32961-04 <0.50 40.0 40.0 39.9 40.2 ug/L EPA 8260B 512103 99.8 100 0.600 70-130 25 <br /> Tert-Butanol 32961-04 <5.0 200 200 200 211 ug/L EPA 8260B 512103 99.9 105 5.36 70-130 25 <br /> Methyl-t-Butyl Ether 32961-04 <Q.50 40.0 40.0 38.9 43.0 ug/L EPA 82608 512103 97.2 108 10.1 70-130 25 <br /> Benzene 32962-06 <0.50 40.0 40.0 39.5 38.7 ug/L EPA 8260B 512103 98.8 96.7 2.20 70-130 25 <br /> Toluene 32962-06 <0.50 40.0 40.0 40.4 39.5 ug/L EPA 8260B 512/03 101 98.7 2.40 70-130 25 <br /> Tert-Butanol 32962-06 <5.0 200 200 208 207 ug/L EPA 8260E 512103 104 103 0.722 70-130 25 <br /> Methyl-t-Butyl Ether 32962-06 <0.50 40.0 40.0 40.0 40.2 ug/L EPA 8260B 512103 99.9 101 0.698 70-130 25 <br /> Approved By: Jpel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 '�A <br />