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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9945000 99.9974000 99.9999000 99.9909000 99.9700000 99.8650000 99.9091000 83.5400000 99.7100000 99.8647000 25.0000000 89.4900000 78.9000000 99.9690000 95.9910000 99.9972500 82.5800000 99.4000000Gas Comp 1PPM CARBON DIOXIDE NITROGEN NITROGEN NITROGEN DIOXIDE PPM NITRIC OXIDE