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- By CategoryMixed GasesGas Comp Amount30.3500000Gas Comp Amount199.7200000 99.9285000 89.4900000 99.7500000 99.9775000 95.0000000 78.4490000 99.9700000 99.9997500 96.0000000 95.9700000 99.9895800 99.9860000 80.4890000 81.6400000Gas Comp 1NITROGEN DIOXIDE PPM CARBON DIOXIDE NITROGEN PPM METHANE