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Report Number 29816 <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 11/25/02 <br /> Project Name 2494 East Fremont Street, <br /> Project Number 2440797 <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 29943-04 <0 50 400 400 416 39 5 ug/L EPA 8260B 11122/02 104 987 537 70-130 25 <br /> Toluene 29943-04 <0 50 400 400 421 408 ug/L EPA 82608 11/22/02 105 102 301 70-130 25 <br /> Tert-Butanol 29943-04 <5 0 200 200 203 212 ug/L EPA 82606 11/22/02 101 106 430 70-130 25 <br /> Methyl-t-Butyl Ether 29943-04 <0 50 400 400 407 386 ug1L EPA 8260B 11/22/02 102 966 532 70-130 25 <br /> Benzene 29816-21 <0 0050 00398 00396 00375 00362 mg/Kg EPA 8260B 11/22/02 942 914 304 70-130 25 <br /> Toluene 29816-21 <0 0050 00398 00396 00375 00363 mg/Kg I=PA 8260B 11/22/02 942 917 266 70-130 25 <br /> Tert-Butanol 29816-21 <0 0050 0199 0198 0189 0 173 mg/Kg EPA 8260E 11/22/02 948 873 826 70-130 25 <br /> Methyl-t-Butyl Ether 29816-21 <0 0050 00398 00396 00414 00385 mg/Kg EPA 8260B 11122/02 104 971 667 70-130 25 <br /> i <br /> Approved By J I KdF <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />