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- By CategoryMixed GasesGas Comp Amount2200.0000000Gas Comp Amount181.9973000 99.9514000 89.4900000 89.1850000 99.9900000 28.0000000 99.9800000 83.0930000 99.9973000 86.8000000Gas Comp 1PPM NITROGEN DIOXIDE HYDROGEN PPM AMMONIA NITROGEN