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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount199.9500000 2.0000000 79.9875000 82.4940000 99.9650000 64.6000000 99.9998000 13.5000000 99.9983000 99.5000000 83.5400000 90.4000000 99.9730000 99.9869700 98.9900000 15.6000000 76.5000000 81.9820000Gas Comp 1PPM CARBON DIOXIDE CARBON DIOXIDE NITROGEN NITROGEN DIOXIDE NITROGEN