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Report Number 32613 - <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 4/11103 <br /> Protect Name 7-Eleven Store#20632 <br /> Project Number 77EL 20632 43 <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 Lima Limit <br /> Benzene 32592-04 <0 0050 00394 00391 00318 00346 mg/Kg EPA 8260B 418/03 807 88 3 902 70-130 25 <br /> Toluene 32592-04 <0 0050 00394 00391 00302 00333 mg/Kg EPA 82606 418103 768 851 102 70-130 25 <br /> Tert-Butanol 32592-04 <0 0050 0 197 0 196 0 158 0 172 mg/Kg EPA 82606 418103 802 881 932 70-130 25 <br /> Methyl-t-Butyl Ether 32592-04 <0 0050 00394 00391 00318 00295 mg/Kg EPA 82608 4/8103 808 754 6 95 70-130 25 <br /> Approved By J6el Kiff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 iu <br />