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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount190.4000000 99.5000000 13.5000000 98.9900000 99.9983000 79.6800000 99.9998000 87.9890000 83.5400000 76.9890000 99.9967000 69.6000000Gas Comp 1NITROGEN NITROGEN NITROGEN DIOXIDE PPM CARBON DIOXIDE