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Report Number 38948 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/30/2004 <br /> Project Name Sanchez MW8 & MW9 <br /> Project Number Sanchez <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 38941-01 <0 0050 00400 00400 00373 00370 mg/Kg EPA 8260E 6125/04 933 926 0 B08 70-130 25 <br /> Toluene 38941-01 <0 0050 00400 00400 00362 00360 mg/Kg EPA 8260B 6125/04 904 900 0 458 70-130 25 <br /> Tert-Butanoi 38941-01 <0 0050 0200 0200 0 173 0 163 mg/Kg EPA 82606 6125104 866 81 6 591 70-130 25 <br /> Methyl-t-Butyl Ether 38941-01 <0 0050 00400 00400 00370 00356 mg/Kg EPA 8260B 6125/04 92 5 891 375 70-130 25 <br /> Benzene 38936-07 <0 0050 00406 00396 00352 00349 mg/Kg EPA 82606 6/28104 867 880 1 53 70-130 25 <br /> Toluene 38936-07 <0 0050 00406 00396 00371 00371 mg/Kg EPA 8260E 6/28/04 914 936 236 70-130 25 <br /> Tert-Butanol 38936-07 <0 0050 0203 0 198 0 192 0184 mg/Kg EPA 8260B 6128104 94 9 927 236 70-130 25 <br /> Methyl-t-Butyl Ether 38936-07 <0 0050 00406 00396 00370 00353 mg/Kg EPA 8260B 6/28/04 91 1 892 211 70-130 25 <br /> I <br /> I <br /> 1 <br /> KIFF ANALYTICAL, LLC Approved By Jo iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />