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Report Number 46000 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9126/2005 <br /> Project Name 7-Eleven Store#32262 <br /> Project Number 77EL.32262 05 <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike DUD 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 45911-06 2 5 400 400 430 398 ug/L EPA 8260B 9126105 101 932 8 31 70-130 25 <br /> Toluene 45911-06 1 8 400 400 391 385 ug/L EPA 8260B 9126105 932 91 9 148 70-130 25 <br /> Ten`.-Butanol 45911-06 <5 0 200 200 228 215 ug/L EPA 8260B 9126105 114 108 567 70-130 25 <br /> Methyl-t-Butyl Ether45911-06 62 400 400 434 406 ug/L EPA 82606 9126105 930 861 767 70-130 25 <br /> Benzene 46130-06 <0 50 400 400 396 397 ug/L EPA 8260B 9126105 99 0 993 0 286 70-130 25 <br /> Toluene 46130-06 <0 50 400 400 340 341 ug/L EPA 8260B 9/26105 850 852 0 255 70-130 25 <br /> Tert-Butanol 46130-06 <50 200 200 192 182 ug/L EPA 8260B 9126105 962 91 1 543 70-130 25 <br /> Methyl-t-Butyl Ether46130-06 2 0 400 400 460 474 ug/L EPA 8260B 9126105 110 114 330 70-130 25 <br /> 4 <br /> Approved By Jo iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-2974800 <br />