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� i • <br /> Report Number 34511 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 8/20/2003 <br /> Project Name 7-Eleven Store #14117 <br /> Project Number 77EL.14117.03 <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 Lima <br /> Benzene 34503-01 <0 0050 00390 00388 00333 00331 mg/Kg EPA 8260B 8115103 85 4 85 3 00586 70-130 25 <br /> Toluene 34503-01 <0 0050 00390 00388 00340 00338 mg/Kg EPA 8260B 8115103 872 872 0 115 70-130 25 <br /> Tert-Butanol 34503-01 <0 0050 0 195 0 194 0160 0 156 mg/Kg EPA 8260B 8115103 824 804 238 70-130 25 <br /> Methyl-t-Butyl Ether 34503-01 <0 0050 00390 00388 00342 00331 mg/Kg EPA 8260B 8115103 878 853 2 92 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By J I <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-2974800 <br />