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s s i <br /> Report Number 44602 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 7/6/2005 <br /> Protect Name 7-Eleven Store#14117 <br /> Protect Number 77EL.14117.05 <br /> Siked <br /> Duplicate Spiked Spiked to 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 44602-01 <0 50 400 400 402 39 3 ug/L EPA 8260B 711105 100 982 2 33 70-130 25 <br /> Toluene 44602-01 <0 50 400 400 402 39 7 ug/L EPA 8260B 711105 100 99 3 122 70-130 25 <br /> Tert-Butanol 44602-01 16 200 200 232 228 ug/L EPA 8260B 711105 108 106 165 70-130 25 <br /> Methyl-t-Butyl Ether44602-01 <0 50 400 400 352 354 ug/L EPA 8260B 719105 879 88 4 0 583 70-130 25 <br /> Benzene 44575-06 <0 50 400 400 401 398 ug1L EPA 8260B 711105 100 99 6 0 574 70-130 25 <br /> i <br /> Toluene 44575-06 <0 50 400 400 437 433 ug/L EPA 8260B 711105 109 108 106 70-130 25 <br /> Tert-Butanol 44575-06 <50 200 200 220 220 ug/L EPA 8260B 711105 110 110 0 198 70-130 25 <br /> Methyl-t-Butyl Ether44575-06 <0 50 400 400 385 381 ug/L EPA 8260B 711105 962 952 1 15 70-130 25 <br /> Benzene 44619-01 <0 50 400 400 406 394 ug/L EPA 8260B 715105 101 984 308 70-130 25 <br /> Toluene 44619-01 <0 50 400 400 442 426 ug/L EPA 8260B 715105 110 106 373 70-130 25 <br /> Tert-Butanol 44619-01 21 200 200 244 247 ug/L EPA 8260E 715105 111 113 127 70-130 25 <br /> Methyl-t-Butyl Ether44619-01 28 400 400 673 662 ug/L EPA 82608 715105 977 952 266 70-130 25 <br /> Benzene 44583-03 <0 50 400 400 406 404 ug/L EPA 8260B 711105 101 101 0 460 70-130 25 <br /> Toluene 44583-03 <0 50 400 400 409 405 ug/L EPA 8260B 711105 102 101 0 952 70-130 25 <br /> Tert-Butanol 44583-03 <5 0 200 200 196 196 ug/L EPA 8260B 711105 980 98 0 0 00446 70-130 25 <br /> Methyl-t-Butyl Ether44583-03 <0 50 400 400 367 365 ug/L EPA 8260B 711105 91 8 912 0 680 70-130 25 <br /> Approved By Jo iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-297-4800 <br />