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r� <br /> Report Number A <br /> QC Report: Matrix Spike/Matrix Spike Duplicate Date 12/4/2002 <br /> Project Name 440 W. Charter Way, <br /> Project Number 021113-JK-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 Drff Limit Limit <br /> Toluene 29768-14 <0 50 400 400 410 408 ug/L EPA 82608 11/16/02 103 102 0 464 70-130 25 <br /> Tera Butanol 29768-14 <5 0 200 200 205 215 ug/L EPA 82608 11/16/02 103 108 468 70-130 25 <br /> Methyl-t-Butyl Ether 29768-14 11 400 400 514 508 ug/L EPA 82606 11/16/02 102 100 151 70-130 25 <br /> i <br /> Approved By J l Kill <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />