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0 <br /> Report Number 40181 <br /> QC Report Matrix Spike/Matrix Spike Duplicate Date 9/24/2004 <br /> Protect Name 7-Eleven Store#14117 <br /> Protect Number 77EL 14117 04 <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 /> Tert-Butanol 40188-09 57 200 200 204 215 ug/L EPA 8260B 9121104 993 105 524 70-130 25 <br /> Methyl-t-Butyl Ether 40188-09 <0 50 400 400 397 397 ug/L EPA 8260B 9121104 992 993 0 141 70-130 25 <br /> Benzene 40202-01 <0 50 400 400 361 360 ug/L EPA 82608 9122104 90 3 901 0 262 70-130 25 <br /> Toluene 40202-01 <0 50 400 400 373 362 ug/L EPA 8260B 9122104 932 904 305 70-130 25 <br /> Tert-Butanol 40202-01 <5 0 200 200 192 195 ug/l_ EPA 8260B 9122104 962 977 155 70-130 25 <br /> Methyl-t-Butyl Ether 40202-01 <0 50 400 400 38 4 371 ug/L EPA 8260B 9122104 96 0 927 348 70-130 25 <br /> I <br /> Approved By ,to iff <br /> KIFF ANALYTICAL, LLC <br /> 2795 2nd St, Suite 300 Davis, CA 95616 530-2974800 <br />