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Report Number 30867 <br /> QC Report : Matrix Spike/Matrix Spike Duplicate Date 1/13/2003 <br /> Project Name 1071 North Maimst., <br /> Project Number 030107-RM-2 <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 d Value Units Method Analyzed Recov Recav Diff Limit Limit <br /> Benzene 30858-03 47 400 ` 400 - 810 79 9 ug/L EPA 8260E 1112103 839 810 - 342 70-130 25 <br /> Toluene 30858-03 63 400 400 460 451 ug/L EPA 8260B 1112103 992 969 229 70-130 25 <br /> Tert-Butanol 30858-03 29 200 200 228 222 ug/L EPA 8260B 1112103 993 964 299 70-130 25 <br /> Methyl-t-Butyl Ether 30858-03 18 400 400 670 , 575 ug/L EPA 82606 1/12103 969 981 126 70-130 25 <br /> Approved By J I KTff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300sns, CA 95616 530-297-4800 <br />