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Report Number 46282 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 10/10/2005 <br /> Project Name 7-Eleven Store#14117 <br /> Project Number 77EL.14117.05 <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 46261-03 <0 50 392 400 380 38 6 ug/L EPA 8260B 1016105 96 8 966 0 273 70-130 25 <br /> Toluene 46261-03 <0 50 392 400 372 378 uglL EPA 8260B 1016105 949 94 4 0 506 70-130 25 <br /> Tert-Butanol 46261-03 <5 0 196 200 197 197 uglL EPA 8260B 10/6105 100 987 175 70-130 25 <br /> Methyl-t-Butyl Ether 46261-03 <0 50 39 2 400 381 394 uglL EPA 82608 10/6105 971 985 1 36 70-130 25 <br /> Benzene 46284-06 <0 50 400 400 377 371 uglL EPA 8260B 1015105 94 2 92 8 1 50 70-130 25 <br /> Toluene 46284-06 <0 50 400 400 36 5 35 7 uglL EPA 8260B 1015105 912 89 3 209 70-130 25 <br /> Tert-Butanol 46284-06 <5 0 200 200 204 204 ug/L EPA 8260B 1015105 102 102 0202 70-130 25 <br /> Methyl-t-Butyl Ether 46284-06 130 400 400 162 159 uglL EPA 8260B 1015105 872 786 103 70-130 25 <br /> Benzene 46282-08 120 400 400 160 152 ug/L. EPA 8260E 1015105 889 71 1 223 70-130 25 <br /> Toluene 46282-08 220 400 400 264 256 uglL EPA 82606 1015105 105 827 236 70-130 25 <br /> Tert-Butanol 46282-08 170 200 200 378 376 uglL EPA 8260B 1015105 102 101 0 859 70-130 25 <br /> Methyl-t-Butyl Ether46282-08 190 400 400 225 217 ug/L EPA 8260B 1015105 971 775 224 70-130 25 <br /> Benzene 46284-03 21 400 400 408 402 ug/L EPA 8260B 1015105 966 951 162 70-130 25 <br /> Toluene 46284-03 <0 50 400 400 378 377 ug1L EPA 82606 1015105 94 5 94 3 0 257 70-130 25 <br /> Tert-Butanol 46284-03 <5 0 200 200 195 199 uglL EPA 8260B 1015105 97 7 996 187 70-130 25 <br /> Methyl-t-Butyl Ether 46284-03 0 59 400 400 449 447 uglL EPA 82606 1015105 111 110 0 501 70-130 25 <br /> )94' <br /> KIFF ANALYTICAL, LLC Approved By Jo iff <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />