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= IM <br /> ir <br /> Report Number 31607 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 02/27/2003 <br /> Protect Name Stefano's <br /> Protect 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 Vaiue Units Method Analyzed Recov Recov Diff Limit Limit <br /> Benzene 31624-04 <0 50 399 400 406 400 ug/L EPA 82606 2122103 102 100 1 86 70-130 25 <br /> Toluene 31624-04 <0 50 399 400 407 400 ug/L EPA 82606 2122103 102 100 1 78 70-130 25 <br /> Tert-Butanol 31624-04 17 200 200 212 210 ug/L. EPA 82606 2122103 97 6 96 3 1 38 70-130 25 <br /> Methyl-t-Butyl Ether 31624-04 <0 50 399 400 347 35 5 ug/L EPA 82606 2122/03 870 886 191 70-130 25 <br /> Benzene 31621-01 <0 50 400 400 366 36 5 ug/L EPA 82608 2121103 91 6 914 0 219 70-130 25 <br /> Toluene 31621-01 <0 50 400 400 355 35 6 ug/L EPA 82606 2121103 887 89 0 0 310 70-130 25 <br /> Tert-Butanol 31621-01 <5 0 200 200 194 197 ug/L EPA 8260B 2121103 972 985 136 70-130 25 <br /> Methyl-t-Butyl Ether 31621-01 34 400 400 41 0 410 ug/L EPA 8260B 2121103 94 2 941 00531 70-130 25 <br /> Benzene 31614-05 <0 50 400 400 379 374 ug/L EPA 8260B 2121103 94 7 935 1 33 70-130 25 <br /> Toluene 31614-05 <0 50 400 400 37 7 383 ug/L EPA 8260B 2121103 944 958 152 70-130 25 <br /> Tert-Butanol 31614-05 <50 200 200 192 190 ug/L EPA 82606 2/21103 958 951 0 760 70-130 25 <br /> Methyl-t-Butyl Ether 31614-05 20 400 400 51 1 51 0 ug/L EPA 82606 2121103 778 777 00965 70-130 25 <br /> Benzene 31613-01 083 400 400 39 9 39 5 ug/L EPA 8260B 2121103 976 96 7 0 875 70-130 25 <br /> Toluene 31613-01 13 400 400 408 404 ug/L EPA 82606 2121103 98 7 979 0 839 70-130 25 <br /> Tert-Butanol 31613-01 <5 0 200 200 208 203 ug/L EPA 8260B 2121103 104 101 262 70-130 25 <br /> Methyi-t-Butyl Ether 31613-01 7 9 400 400 464 461 ug/L EPA 82606 2121103 961 954 0 757 70-130 25 <br /> Approved By J QI Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />