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• Report Number 22*, <br /> _ z <br /> QC Report . Matrix Spike/Matrix Spike Duplicate Date 10/15/2001 <br /> Project Name 641 <br /> Project Number <br /> Duplicate Spiked <br /> Duplicate Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Spiked Sample Spike Dur) 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 22613-06 057 190 195 201 204 ug/L EPA 82605 101912001103 102 146 70-130 25 <br /> Toluene 22613-06 <0 50 190 195 189 192 uglL EPA 8260E 10191200199 6 986 103 70-130 25 <br /> Tert-Butanol 22613-06 <5 0 94 8 975 923 938 uglL EPA 82608 10191200197 3 963 110 70-130 25 <br /> Methyl-t-Butyl Ether 22613-06 <0 50 190 195 18 5 190 uglL EPA 82606 10191200197 8 976 0 153 70-130 25 <br /> �W1 <br /> Approved By J I Koff <br /> KlFf=ANALYTICAL, LLC � <br /> 720 Olive Drive, Suite D Davis, CA 95616 530-297-4800 <br />