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• Report Number 33353 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 6/4/2003 <br /> Project Name 7-Eleven Store#19976 <br /> Project Number 77EL.19976.43 <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 _Limit Limit <br /> Benzene 33353-01 <0 0050 00400 00398 00321 00356 mg/Kg EPA 8260B 5131103 803 893 106 70-130 25 <br /> Toluene 33353-01 <0 0050 00400 00398 00319 00354 mg/Kg EPA 82608 5131103 798 888 107 70-130 25 <br /> Tert-Butanol 33353-01 <0 0050 0200 0 199 0 170 0 193 mg/Kg EPA 8260E 5/31103 852 968 127 70-130 25 <br /> Methyl-t-Butyl Ether 33353-01 <0 0050 00400 00398 00381 00420 mg/Kg EPA 8260E 5131103 954 105 100 70-130 25 <br /> Approved By J eI Kiff <br /> KIFF ANALYTICAL, LLC i <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br /> I <br />