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- By CategoryMixed GasesGas Comp 4PPM CARBON MONOXIDEGas Comp Amount187.3865000 83.5400000 99.9965900 99.9999250 99.9550000 77.0000000 99.9880000 82.4100000 31.4100000 89.4900000 99.7000000 82.4940000Gas Comp 1AIR NITROGEN NITRIC OXIDE PPM CARBON MONOXIDE