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Report Number 4105 <br /> QC Report Matrix Spike]Matrix Spike Duplicate Date 5/9/2002 <br /> Project Name 2494 Fremont Street, <br /> Project Number 020501-BM2 <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 26191-09 <0 50 200 195 18 3 176 ug/L EPA 82608 517102 912 902 108 70-130 25 <br /> Toluene 26191-09 <0 50 200 195 176 170 ug/L EPA 8260E 517102 881 875 0 655 70-130 25 <br /> Tert-Butanol 26191-09 <60 100 974 938 891 ug/L EPA 8260B 5/7102 936 91 5 229 70-130 25 <br /> Methyl-t-Butyl Ether26191-09 14 200 195 30 0 297 ug/L EPA 82608 517102 825 832 0 804 70-130 25 <br /> Benzene 26216-01 <0 50 400 400 423 390 ug/L EPA 8260B 514102 106 974 807 70-130 25 <br /> Toluene 26216-01 <0 50 400 400 459 423 ug/L EPA 82608 514102 115 106 815 70-130 25 <br /> Tert-Butanol 26216-01 <5 0 200 200 234 235 ug/L EPA 8260B 514102 117 117 0 525 70-130 25 <br /> Methyl-t-Butyl Ether 26216-01 <0 50 400 400 331 31 5 ug]L EPA 82608 514102 827 78 8 477 70-130 25 <br /> Benzene 26230-03 <0 50 400 400 429 422 ug/L EPA 8260E 517102 107 105 176 70-130 25 <br /> Toluene 26230-03 <0 50 400 400 399 393 ug/L EPA 8260E 517102 99 8 98 2 156 70-130 25 <br /> Tert-Butanol 26230-03 71 200 200 205 209 ug1L EPA 8260E 517/02 988 101 209 70-130 25 <br /> Methyl-t-Butyl Ether 26230-03 100 400 400 138 138 ug1L EPA 8260E 517102 94 4 94 8 0 449 70-130 25 <br /> i <br /> I <br /> I <br /> KIFF ANALYTICAL, LLC Approved By JI Kill <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br /> I <br />