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Report Number: 36324 {. <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date : 1/512004 <br /> Project Name : USA Gas <br /> Project Number: D003-004-1 <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 36333-01 <0.50 40.0 40.0 45.3 43.5 ug/L EPA 8260B 12/22/03 113 109 4.12 70-130 25 <br /> Toluene 36333-01 <0.50 40.0 40.0 44.4 44.6 ug/L EPA 82608 12/22/03 111 112 0.540 70-130 25 <br /> Tert-Butanol 36333-01 <5.0 200 200 212 211 ug/L EPA 8260B 12/22/03 106 106 0.0331 70-130 25 <br /> Methyl-t-Butyl Ether 36333-01 <0.50 40.0 40.0 45.8 42.4 ug/L EPA 82606 12/22/03 114 106 7.64 70-130 25 <br /> Benzene 36345-06 <0.50 40.0 40.0 42.9 43.1 ug/L EPA 82606 12/23/03 107. 108 0.558 70-130 25 <br /> Toluene 36345-06 <0.50 40.0 40.0 41.9 42.2 ug/L EPA 8260B 12/23/03 105 106 0.666 70-130 25 <br /> Tert-Butanol 36345-06 <5.0 200 200 208 205 ug/L EPA 8260B 12/23/03 104 103 1.37 70-130 25 <br /> Methyl-t-Butyl Ether 36345-06 <0.50 40.0 40.0 45.1 44.6 ug/L EPA 8260B 12/23/03 113 111 1.07 70-130 25 <br /> TPH as Diesel Blank <50 1000 1000 981 98i ug!L M EPA 8015 42130103 98.1 9&1 0.00 70-130 25 <br /> n '4 <br /> f <br /> VD <br /> Approved By: J( I <br /> KIFF ANALYTICAL, LLC ' <br /> } <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />