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- By CategoryMixed GasesGas Comp 4OXYGENGas Comp Amount179.1000000 82.4940000 99.9250000 84.0325000 79.4900000 99.9749500 99.9832000 93.8450000 99.9760000 99.9950000Gas Comp 1PPM FORMALDEHYDE SULFUR DIOXIDE NITROGEN PPM NITROGEN DIOXIDE AIR