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� • i <br /> Report Number 37019 <br /> QC Report Matrix Spike!Matrix Spike Duplicate Date 02/21/2004 <br /> Project Name COX +COX# 4080 <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 37026-01 <0 0050 00398 00396 00383 00375 mg/Kg EPA 8260E 2113/04 962 946 170 70-130 25 <br /> Toluene 37026-01 <0 0050 00398 00396 00384 00377 mg/Kg EPA 8260E 2113/04 966 951 154 70-130 25 <br /> Tert-Butanol 37026-01 <0 0050 0199 0198 0193 0199 mg/Kg EPA 8260E 2113104 972 100 335 70-130 25 <br /> Methyl-t-Butyl Ether 37026-01 <0 0050 00398 00396 00385 00364 mg/Kg EPA 8260E 2113104 96 8 920 514 70-130 25 <br /> I <br /> I <br /> i <br /> Approved By IJ { IW i+' <br /> KIFF ANALYTICAL, LLC ; <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />