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Report Number : 42645 <br /> QC Report : Matrix Spike/ Matrix Spike Duplicate Date : 3/11/2005 <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <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 /> Tert-Butanol 42652-01 <5.0 200 200 196 190 ug/L EPA 8260B 317105 98.3 95.1 3.29 70-130 25 <br /> Methyl-t-Butyl Ether 42652-01 <0.50 40.0 40.0 39.0 38.7 ug/L EPA 82606 317105 97.5 96.8 0.734 70-130 25 <br /> Benzene 42668-03 <0.50 40.0 40.0 37.1 36.2 ug/L EPA 8260B 318105 92.8 90.4 2.62 70-130 25 <br /> Toluene 42668-03 <0.50 40.0 40.0 36.5 35.1 ug/L EPA 82606 318105 91.2 87.7 3.97 70-130 25 <br /> Tert-Butanol 42668-03 <5.0 200 200 183 191 ug/L EPA 8260B 318/05 91.5 95.7 4.56 70-130 25 <br /> Methyl-t-Butyl Ether 42668-03 <0.50 40.0 40.0 38.2 37.2 ug/L EPA 8260B 3/8105 95.6 93.1 2.66 70-130 25 <br /> Benzene 42708-01 <0.50 40.0 40.0 38.3 37.6 ug/L EPA 8260B 3110/05 95.7 94.0 1.78 70-130 25 <br /> Toluene 42708-01 <0.50 40.0 40.0 37.1 37.0 ug/L EPA 8260B 3110105 92.7 92.6 0.161 70-130 25 <br /> Tert-Butanol 42708-01 <5.0 200 200 191 190 ug/L EPA 8260B 3110105 95.7 95.1 0.632 70-130 25 <br /> Methyl-t-Butyl Ether 42708-01 0.70 40.0 40.0 39.6 39.3 ug/L EPA 8260B 3/10105 97.3 96.4 0.912 70-130 25 <br /> KlFF ANALYTICAL, LLC Approved By: Joe iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />