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Report Number 29880 <br /> 4C Report- Matrix Spike/Matrix Spike Duplicate Date 11/26/2002 <br /> Project Name 2494 East Fremont Street, <br /> Project Number 244-0797 <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 29964-02 <0 0050 00386 00387 00349 00379 mg/Kg EPA 8260E 11/25/02 904 980 802 70-130 25 <br /> Toluene 2996402 <0 0050 00386 00387 00315 00347 mg/Kg EPA 82606 11/25/02 817 898 950 70-130 25 <br /> Tert-Butanol 29964-02 <0 0050 0 193 0 193 0 171 0 189 mg/Kg EPA 8260B 11/25/02 885 979 101 70-130 25 <br /> Methyl-t-Butyl Ether 29964-02 <0 0050 00386 00387 00357 00345 mg/Kg EPA 8260B 11/25/02 924 891 361 70-130 25 <br /> Benzene 29894-01 <0 50 395 38 5 394 38 5 ug/L EPA 82606 11/25/02 998 100 0 225 70-130 25 <br /> Toluene 29894-01 <0 50 395 38 5 398 384 ug/L EPA 8260E 11/25/02 101 998 0 823 70-130 25 <br /> Tert-Butanol 29894-01 <5 0 198 193 194 186 ug/L EPA 8260B 11/25/02 981 968 127 70-130 25 <br /> Methyl-t Butyl Ether 2989401 <0 50 395 38 5 41 7 406 ug/L EPA 82606 11/25/02 106 105 0 213 70-130 25 <br /> Benzene 29983-03 <0 50 400 400 41 9 400 ug/L EPA 82608 11/25102 105 100 4 57 70-130 25 <br /> Toluene 29983-03 <0 50 400 400 425 400 ug/L EPA 8260E 11/25/02 106 100 620 70-130 25 <br /> Tert-Butanol 29983-03 <5 0 200 200 203 209 ug/L EPA 8260E 11/25/02 102 104 280 70-130 25 <br /> Methyl-t-Butyl Ether 29983-03 <0 50 400 400 371 362 ug/L EPA 82608 11/25/02 928 906 243 70-130 25 <br /> q <br /> Approved By JI Kiff <br /> KIFF ANALYTICAL, LLC 0 <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />