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i <br /> Report Number 23954 <br /> QC Report Matrix Spike/ Matrix Spike Duplicate Date 12/2612001 <br /> Project Name FOS , <br /> Project Number 3490 <br /> Duplicate Duplicate Spiked <br /> uP 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 23954-01 <0 50 199 197 195 192 ug/L EPA 8260E 12121120098 3 973 1 02 70-130 25 <br /> Toluene 23954-01 <0 50 19 9 197 18 4 181 ug/L EPA 8260B 12121120092 8 91 8 1 11 70-130 25 <br /> Tert-Butanol 23954-01 <5 0 99 4 986 102 103 ug/L EPA 8260E 121211200102 104 1 75 70-130 25 <br /> Methyl-t-Butyl Ether 23954-01 <0 50 199 197 189 188 ug/L EPA 8260E 12121120095 0 951 0 131 70-130 25 <br /> i <br /> Approved By Joel Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive Siete D Davis CA 99616 530-247-4800 1 <br />