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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9010000 99.9892000 99.9065000 99.9320000 99.9825000 99.7500000 80.4375000 83.5400000 385.0000000 79.9000000 83.7325000 99.8960000 79.7600000 99.9862500 99.9020000 99.8120000Gas Comp 1NITROGEN NITROGEN NITROGEN DIOXIDE PPM CARBON DIOXIDE