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QC Report: Matrix Spike/Matrix Spike Duplicate Report Nu <br /> Date : 6/mber 33713 <br /> Number:3 <br /> Project Name: 7-Eleven Store#32262 <br /> Project Number: 77EL.32262.43 <br /> Duplicate Duplicate Spiked <br /> p Spiked Spiked Sample Relative <br /> Spike Spiked Spiked Sample Sample Relative Percent Percent <br /> Parameter <br /> Spiked <br /> Sample <br /> Le ee LLevel Valuele Valuele Units Methods Anal zed Recov. Recov t Diff. Rmity. Limit <br /> Benzene 33753-06 0.76 40.0 40.0 41.2 40.7 ug/L EPA 82608 6/23/03 101 99.9 1.10 70-130 25 <br /> Toluene 33753-06 <0.50 40.0 40.0 41.6 41.0 ug/L EPA 82608 6/23/03 104 102 1.40 70-130 25 <br /> Tert-Butanol 33753-06 <5.0 200 200 212 207 ug/L EPA 8260B 6/23/03 106 104 2.15 70-130 25 <br /> Methyl-t-Butyl Ether 33753-06 <0.50 40.0 40.0 36.5 37.4 ug/L EPA 8260B 6/23/03 91.2 93.4 2.33 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By: J el Kiff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 �1U <br />