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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.5500000 99.9986500 98.8900000 82.4940000 99.6000000 80.5000000 99.9780000 99.9370000 99.9395000 99.9999000 79.5000000 99.9999990 99.8920000 83.5400000 99.9993000 79.2000000 78.4000000Gas Comp 1NITROGEN DIOXIDE PPM CARBON DIOXIDE NITROGEN NITROGEN