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Report Number : 23704 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 12/17/2001 <br /> Project Name : BEACON, STOCKTON <br /> Project Number: 1474.44 <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 23768-01 <0.50 19.6 19.9 20.0 20.9 ug1L EPA 8260E 121912001102 105 2.88 70-130 25 <br /> Toluene 23768-01 <0.50 19.6 19.9 20.4 21.4 ug/L EPA 82606 121912001104 108 3.54 70-130 25 <br /> Tert-Butanol 23768-01 5.3 97.8 99.4 114 115 ug/L EPA 82608 121912001111 111 0.576 70-130 25 <br /> j Methyl-t-Butyl Ether 23768-01 25 19.6 19.9 43.2 44.5 ug/L EPA 82606 12191200190.9 96.1 5.54 70-130 25 <br /> Benzene 23704-11 5400 400 400 4040 3940 ug/L EPA 8260B 1211112000.00 0.00 0.00 70-130 25 <br /> Toluene 23704-11 6000 400 400 4080 3960 ug/L EPA 82606 1211112000.00 0.00 0.00 70-130 25 <br /> Tert-Butanol 23704-11 23 2000 2000 2270 2170 ug/L EPA 8260E 12111/200112 107 4.26 70-130 25 <br /> Methyl-t-Butyl Ether 23704-11 <0.50 400 400 370 388 ug/L EPA 8260B 12/11120092.4 97.1 4.93 70-130 25 <br /> Benzene 23704-01 <0.50 40.0 40.0 43.7 42.8 ug/L EPA 8260E 121912001109 107 2.06 70-130 25 <br /> Toluene 23704-01 <0.50 40.0 40.0 44.5 43.6 ug/L EPA 8260E 12/912001111 109 2.09 70-130 25 <br /> Tert-Butanol 23704-01 <5.0 200 200 203 210 ug1L EPA 8260B 121912001102 105 2.97 70-130 25 <br /> Methyl-t-Butyl Ether 23704-01 <0.50 40.0 40.0 45.1 44.9 ug/L EPA 8260E 121912001113 112 0.378 70-130 25 <br /> I � <br /> I � <br /> I <br /> i <br /> ~/tom <br /> Approved By: J16eI Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />