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Report Number: 30259 QC Report : Matrix Spike/Matrix Spike Duplicate Date : 12/17/2002 Project Name : Former Beacon #12474 Project Number: 1474.45 Duplicate Spiked Duplicate Spiked Spiked Sample Relative Spike Spiked Spiked Sample Sample Relative Percent Percent Spiked Sample Spike Dup. Sample Sample Analysis Date Percent Percent Percent Recov. Diff. Parameter Sample Value Level Level Value Value Units Method Analyzed Recov. Recov, Diff. Limit Limit Benzene 30247-06 0.90 39.8 39.8 39.0 39.7 ug/L EPA 8260B 12/16/02 95.7 97.3 1.63 70-130 25 Toluene 30247-06 0.65 39.8 39.8 39.5 37.8 ug/L EPA 8260E 12/16/02 97.5 93.3 4.40 70-130 25 Tert-Butanol 30247-06 530 199 199 728 757 ug/L EPA 8260B 12/16/02 99.6 114 13.3 70-130 25 Methyl-t-Butyl Ether 30247-06 33 39.8 39.8 65.9 64.4 ug/L EPA 8260B 12/16/02 82.3 78.5 4.76 70-130 25 Benzene 30386-03 <0.50 40.0 40.0 40.4 40.0 ug/L EPA 8260B 12/16/02 101 100 1.09 70-130 25 Toluene 30386-03 <0.50 40.0 40.0 38.5 38.4 ug/L EPA 8260B 12/16/02 96.2 96.1 0.104 70-130 25 Tert-Butanol 30386-03 <5.0 200 200 207 213 uglL EPA 8260E 12/16/02 104 106 2.52 70-130 25 Methyl-t-Butyl Ether 30386-03 <0.50 40.0 40.0 41.1 40.7 ug/L EPA 8260E 12/16/02 103 102 1.05 70-130 25 Benzene 30285-03 <0.50 40.0 40.0 39.7 38.8 ug/L EPA 8260E 12/12/02 99.2 96.9 2.37 70-130 25 Toluene 30285-03 <0.50 40.0 40.0 38.5 37.8 ug/L EPA 8260B 12/12/02 96.4 94.4 2.07 70-130 25 Tert-Butanol 30285-03 6.6 200 200 207 202 ug1L EPA 8260B 12/12/02 100 97.6 2.47 70-130 25 Methyl-t-Butyl Ether 30285-03 <0.50 40.0 40.0 38.0 36.9 ug/L EPA 8260E 12/12/02 94.9 92.2 2.86 70-130 25 Benzene 30259-03 19 40.0 40.0 59.2 58.0 ug/L EPA 8260E 12/12/02 99.8 96.6 3.23 70-130 25 Toluene 30259-03 24 40.0 40.0 64.7 63.8 ug/L EPA 8260E 12/12/02 100 98.4 2.06 70-130 25 Tert-Butanol 30259-03 <5.0 200 200 189 185 uglL EPA 8260B 12/12/02 94.7 92.5 2.30 70-130 25 Methyl-t-Butyl Ether 30259-03 <0.50 40.0 40.0 39.1 39.2 ug/L EPA 8260E 12/12/02 97.7 98.1 0.409 70-130 25 Benzene 30247-01 5.3 40.0 40.0 42.4 41.0 ug/L EPA 82606 12/13/02 92.6 89.2 3.85 70-130 25 Toluene 30247-01 1.0 40.0 40.0 40.3 39.3 ug/L EPA 8260E 12/13/02 98.0 95.6 2.48 70-130 25 i K1FF ANALYTICAL, LLC Approved By: J6el Kiff i� 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 i