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! i W . <br /> Report Number: 37290 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date : 3/11/2004 <br /> Project Name : Former Beacon 12474 <br /> Project Number : 1474.4.7 <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 37302-02 <0.50 38.5 39.9 39.3 40.9 ug/L EPA 82606 3110104 102 102 0.114 70-130 25 <br /> Toluene 37302-02 <0.50 38.5 39.9 37.0 39.1 ug/L EPA 82606 3110104 96.1 97.9 1.87 70-130 25 <br /> Tert-Butanol 37302-02 <5.0 192 200 191 183 ug/L EPA 8260B 3110104 99.5 91.8 8.09 70-130 25 <br /> Methyl-t-Butyl Ether 37302-02 0.62 38.5 39.9 43.8 46.9 ug/L EPA 8260E 3110104 112 116 3.27 70-130 25 <br /> Benzene 37290-01 7.4 40.0 40.0 47.8 46.7 ug/L EPA 8260B 3/9104 101 98.2 2.80 70-130 25 <br /> Toluene 37290-01 16 40.0 40.0 55.8 54.5 ug/L EPA 82606 3/9104 101 97.5 3.16 70-130 25 <br /> Tert-Butanol 37290-01 <5.0 200 200 187 199 ug/L EPA 82608 3/9/04 93.6 99.7 6.35 70-130 25 <br /> Methyl-t-Butyl Ether 37290-01 <0.50 40.0 40.0 41.9 42.2 ug/L EPA 82606 319/04 105 105 0.617 70-130 25 <br /> Approved By: R P Furry <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />