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Report Number 48348 <br /> QC Report Matrix Spike!Matrix Spike Duplicate Date 2/16/2006 +- <br /> Protect Name Cohn Property <br /> Protect Number COH01 001 <br /> I <br /> DuDplicate Duplicate Spiked <br /> p 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 Reoov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Analyzed RecOV Recov Diff Limit Limit <br /> Benzene 48377-01 <0 50 40 0 400 406 403 ug/L EPA 8260B 2114106 102 101 0 810 70-130 25 <br /> Toluene 48377-01 <0 50 400 400 404 399 ug/L EPA 8260B 2114106 101 997 1 19 70-130 25 <br /> Tert-Butanol 48377-01 <5 0 200 200 186 192 ug/L EPA 82606 2114106 931 961 314 70-130 25 <br /> Methyl-t-Butyl Ether 48377-01 <0 50 400 400 426 439 ug/L EPA 8260E 2114106 107 110 2 80 70-130 25 <br /> Benzene 48356-12 <0 50 400 400 41 6 394 ug/L EPA 82606 2113106 104 985 537 70-130 25 <br /> Toluene 48356-12 <0 50 400 400 375 355 ug/L EPA 8260E 2113106 937 88 8 5 41 70-130 25 <br /> Teri-Butanol 48356-12 <5 0 200 200 217 212 ug/L EPA 82606 2113106 108 106 246 70-130 25 <br /> Methyl-t-Butyl Ether48356-12 14 400 400 473 468 ug/L EPA 82606 2113106 115 114 1 02 70-130 25 <br /> i <br /> KIFF ANALYTICAL, LLC Approved By Jo iff <br /> 27952nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />