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i <br /> Report Number 34399 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 8/11/2003 <br /> Project Name CARBON TANK <br /> Protect Number <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 34388-06 <0 50 400 400 406 393 ug/L EPA 8260B 819103 102 982 338 70-130 25 <br /> Toluene 34388-06 <0 50 400 400 468 454 ug/L. EPA 82608 819103 117 113 314 70-130 25 <br /> Tert-Butanol 34388-06 <50 200 200 207 207 ug/L EPA 82606 819103 104 904 0130 70-130 25 <br /> Methyl-t-Butyl Ether 34388-06 <0 50 400 400 34 9 349 ug/L EPA 8260B 8/9103 873 872 0 115 70-130 25 <br /> I <br /> I <br /> i <br /> Approved By i Jf� ahlf <br /> KIFF ANALYTICAL, LLC ( f <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 `1,1f <br />