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i � • i <br /> Report Number 37139 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 3/3/2004 <br /> Project Name COX + COX -595 E. 11th <br /> Project 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 37090-08 0 022 00755 00760 00831 00848 mg/Kg EPA 8260B 2124104 806 823 2 08 70-130 25 <br /> Toluene 37090-08 <0 0050 00755 00760 00688 00669 mg/Kg EPA 8260E 2124104 91 1 879 3 59 70-130 25 <br /> Tert-Butanol 37090-08 <0 0050 0 377 0 380 0 343 0 349 mg/Kg EPA 8260B 2124104 909 918 0 890 70-130 25 <br /> Methyl-t-Butyl Ether 37090-08 <0 0050 00755 00760 00702 00709 mg/Kg EPA 8260B 2124104 930 932 0 299 70-130 25 <br /> I <br /> I <br /> Approved By R P Furry <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297A800 <br />