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Report Number 31263 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 2/10/2003 <br /> Project Name SANCHEZ <br /> Project Number <br /> Duplicate Duplicate Spiked <br /> P Spiked Spiked Sample Relative <br /> Spiked Sample Spike <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> 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 /> Tert-Butanol 31357-01 <5 0 200 200 196 199 ug/L EPA 82608 217/03 979 997 1 82 70-130 25 <br /> Methyl-t-Butyl Ether 31357-01 <0 50 400 400 399 404 ug/L EPA 82606 2/7103 998 101 1 24 70-130 25 <br /> Benzene 31343-01 <0 50 400 400 41 2 403 ug/L EPA 82608 2/7/03 103 101 206 70-130 25 <br /> Toluene 31343-01 <0 50 400 400 374 366 ug/L EPA 8260B 217103 936 91 4 235 70-130 25 <br /> Tert-Butanol 31343-01 <5 0 200 200 197 199 ug/L EPA 8260B 2/7103 98 4 99 6 1 19 70-130 25 <br /> Methyl-t-Butyl Ether 31343-01 <0 50 400 400 38 8 38 5 ug/L EPA 8260E 217103 970 96 2 0 880 70-130 25 <br /> Benzene 31263-07 <0 50 400 400 39 7 38 9 ug/L EPA 8260B 2/6103 992 973 186 70-130 25 <br /> Toluene 31263-07 <0 50 400 400 430 425 ug/L EPA 82606 216103 108 106 129 70-130 25 <br /> Tert-Butanol 31263-07 <5 0 200 200 216 214 ug/L EPA 8260E 216103 108 107 0 976 70-130 25 <br /> Methyl-t-Butyl Ether 31263-07 <0 50 400 400 363 344 ug/L EPA 82606 2/6103 90 6 861 5 15 70-130 25 <br /> ti <br /> i <br /> KIFF ANALYTICAL, LLC Approved By Jet Kiff <br /> 2795 2nd St, Suite 300 Davis,CA 95616 530-297-4800 i�f <br />