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Report Number : 42645 <br /> QC Report : Matrix Spikel Matrix Spike Duplicate Date : 3/1112005 <br /> Project Name : Beacon <br /> Project Number : 3641 Stockton <br /> DuSiked <br /> Duplicate Spiked Spiked to 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 42645-04 <0.50 39.8 39.9 43.0 43.4 ug/L EPA 8260B 315105 108 109 0.736 70-130 25 <br /> Toluene 42645-04 <0.50 39.8 39.9 42.8 43.2 ug/L EPA 8260B 315105 108 108 0.527 70-130 25 <br /> Tert-Butanol 42645-04 <5.0 199 200 212 213 ug/L EPA 82608 315105 107 106 0,313 70-130 25 <br /> Methyl-t-Butyl Ether 42645-04 21 39.8 39.9 63.8 65.1 ug/L EPA 8260E 315105 108 111 2.49 70-130 25 <br /> Benzene 42632-03 54 40.0 40.0 91.9 87.4 ug/L EPA 8260B 318105 94.5 83.2 12.7 70-130 25 <br /> Toluene 42632-03 160 40.0 40.0 196 185 ug/L EPA 8260E 318105 80.2 52,0 42.6 70-130 25 <br /> Tert-Butanol 42632-03 X5.0 200 200 187 190 ug/L EPA 8260B 318105 93.4 95.0 1.72 70-130 25 <br /> Methyl-t-Butyl Ether42632-03 1.6 40.0 40.0 37.4 38.0 ug/L EPA 82608 318105 89.4 91.1 1.83 70-130 25 <br /> Benzene 42679-07 X0.50 40.0 40.0 37,6 37.0 ug/L EPA 8260E 3/9105 94.0 92.6 1.50 70-130 25 <br /> Toluene 42679-07 <0.50 40.0 40.0 34.6 33.2 ug/L EPA 8260B 319105 86.4 83.0 3.97 70-130 25 <br /> Tert-Butanol 42679-07 <5.0 200 200 154 181 ug/L EPA 8260B 319105 76.8 90.7 16.5 70-130 25 <br /> Methyl-t-Butyl Ether 42679-07 <0.50 40.0 40.0 32.6 32.7 ug/L EPA 8260B 319105 81.5 81.7 0.243 70-130 25 <br /> Benzene 42668-04 65 40.0 40.0 106 105 uglL EPA 8260B 318105 101 98.1 3.18 70-130 25 <br /> Toluene 42668-04 8.3 40.0 40.0 47.8 47.3 ug/L EPA 8260B 318105 98.8 97.6 1.27 70-130 25 <br /> Tert-Butanol 42668-04 6.0 200 200 192 194 ug/L EPA 8260B 318105 93.2 94.1 0:991 70-130 25 <br /> Methyl-t-Butyl Ether 42668-04 <0.50 40.0 40.0 36.5 36.4 ug/L EPA 82608 318105 91.2 91.0 0.204 70-130 25 <br /> Benzene 42652-01 <0.50 40.0 40.0 38.8 37.6 ug/L EPA 8260E 317105 97.1 93.9 3.39 70-130 25 <br /> Toluene 42652-01 <0.50 40.0 40.0 37.6 36.2 ug/L EPA 8260B 317/05 94,0 90.6 3.68 70-130 25 <br /> Approved e <br /> KIFF ANk ':?TICAL, LLC Pp Y= Joe iff <br /> 2795 2nd St, Suite 300�Davis, CA 95616 530-297-4800 <br />