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QC Report Matrix Spike/Matrix Spike Duplicate Report Number 34512 <br /> Date 9/2/2003 <br /> Project Name 7-Eleven Store 914117 <br /> Project Number 77EL.14117 03 <br /> Duplicate Spiked Duplicate Spiked <br /> Spiked Sample Spike Spike Spiked Spiked P Spiked Sample Relative <br /> Parameter P Sam Ie Sample Sample Sample Relative Percent Percent <br /> Sample Value Level Level Value Value Units Methods Ancef ed ReccecOv t Recount PPejlrcent Recov Diff <br /> Tert-Butanol 34537-01 <5 0 200 200 197 197 ug/L EPA 8260B 8116/03 986 983 mit Limit <br /> Methyl-t-Butyl Ether 34537-01 <0 50 400 400 461 448 ug/L EPA 8260E 8116/03 115 112 291 70-130 25 <br /> 25 <br /> Benzene 34502-15 2 3 400 400 417 407 ug/L EPA 8260E 8/17103 984 960 2 55 70.130 <br /> Toluene 34502-15 2 1 400 400 452 439 ug/L EPA 8260B 8117/03 108 104 302 70-130 25 <br /> Tert-Butanol 34502-15 <5 0 200 200 193 195 ug/L EPA 82606 8117/03 964 974 104 70-1 250 25 <br /> Methyl-t-Butyl Ether 34502-15 3 5 400 400 505 49 6 ug/L EPA 8260E 8/17103 117 115 180 70-130 25 <br /> Benzene 34589-01 <0 50 400 400 386 376 ug/L EPA 82608 8122103 964 940 2 57 70_ <br /> Toluene 34589-01 <0 50 400 400 400 39 7 ug/L EPA 82608 8122/03 100 992 0 903 70-130 25 <br /> Tert-Butanol 34589-01 <5 0 200 200 189 18760B 30 25 <br /> 8/22/03 944 93 3 Methyl-t-Butyl Ether 34589-01 <0 50 400 400 378 374 ug/L EPA 82608 8122103 944 934 1 06 70 -130 25 <br /> 70-130 25 <br /> KIFF ANALYTICAL, LLC Approved By3 I <br /> r <br /> 2795 2nd St, Suite 300 is, CA 95616 530-297-4800 <br />