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Report Number 29942 <br /> QC Report. Matrix Spikel Matrix Spike Duplicate Date 12/2/2002 <br /> Project Name 2494 East Fremont Street, <br /> Project Number 244-0797 <br /> Duplicate Spiked I <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dup Sample Sample Analysis Dake Percent Percent Percent Recov Diff <br /> Parameter Sample Value Level Level Value Value Units Method Ana! ed Recov Recov Diff Limit Limit <br /> Benzene 29964-02 <0 0050 00386 00387 00349 00379 mg/Kg EPA 82608 11/25/02 90i 4 98 0 802 70-130 25 <br /> Toluene 29964-02 <0 0050 00386 00387 00315 00347 mg/Kg EPA 82608 11/25/02 8117 898 950 70-130 25 <br /> Tert-Butanol 29964-02 <0 0050 0 193 0 193 0171 0189 mg/Kg EPA 8260B 11125/02 845 979 101 70-430 25 <br /> Methyl-t-Butyl Ether 29964-02 <0 0050 00386 00387 00357 00345 mg/Kg EPA 8260E 11/25/02 914 891 3 61 70-130 25 <br /> Benzene 30016-03 <0 50 400 400 382 384 uglL EPA 8260B 11/27/02 95 6 961 0 600 70-130 25 <br /> 11 <br /> Toluene 30016-03 <0 50 400 400 39 7 394 uglL EPA 82608 11/27102 99 3 985 0 809 70-130 25 <br /> Tert-Butanol 30016-03 <5 0 200 200 213 212 uglL EPA 82608 11/27/02 106 106 0 245 70-130 25 <br /> Methyl-t-Butyl Ether 30016-03 <0 50 400 400 437 439 uglL EPA 8260E 11/27/02 109 110 0 548 70-130 25 <br /> I <br /> i I <br /> i <br /> I <br /> I <br /> I <br /> Approved By .i I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 30*vis, CA 95616 530-297-4800 <br />