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� � � � � � !� � � � >• � � illllli� illl■I� Illi i <br /> 0 <br /> Report Number: 24680 <br /> QC Report ., Matrix Spike/Matrix Spike Duplicate Date : 2/22/2002 <br /> Project Name : Chevron 9-05571139 <br /> Project Number: 077.43445.351 <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 /> TPH as Diesel Blank <50 1000 1000 1050 1140 ug/L M EPA 8015 2/8/2002 105 114 7.96 70-130 25 <br /> Benzene 24676-01 <0.50 35.8 37.7 36.5 38.6 ug/L EPA 82606 211212002102 102 0.416 70-130 25 <br /> Toluene 24676-01 <0.50 35.8 37.7 33.6 36.2 ug/L EPA 8260B 2112/200293.9 96.0 2.24 70-130 25 <br /> Tert-Butanol 24676-01 <5.0 179 189 169 184 ug/L EPA 8260B 2/12/200294.3 97.3 3.12 70-130 25 <br /> Methyl-t-Butyl Ether 24676-01 110 35.8 37.7 146 150 ug/L EPA 82606 2112/200290.9 95.9 5.36 70-130 25 <br /> I <br /> I' <br /> Approved By: Joel Kiff y' <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 U <br />