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r <br /> i <br /> Report Number A <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 12/05/01 <br /> Project Name 2494 Fremont Street, <br /> Project Number 011128-KF-1 <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 /> Spike Recovery Data <br /> Benzene 23605-02 <0 50 387 395 39 3 402 ug/L EPA 8260B 12/01/01 102 102 00983 70-130 25 <br /> Toluene 23605-02 <0 50 38 7 39 5 38 2 39 0 ug/L EPA 8260B 12/01/01 986 988 0 152 70-130 25 <br /> Tert-Butanol 23605-02 <5 0 193 198 188 193 ug/L EPA 8260B 12/01/01 970 976 0 555 70-130 25 <br /> Methyl-t-Butyl Ether 23605-02 <0 50 38 7 395 411 404 ug/L EPA 8260B 12/01/01 106 102 379 70-130 25 <br /> f <br /> I ti <br /> Approved By J I Kiff <br /> KIFF ANALYTICAL, LLC <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />