NIC 352099 - Production of other gases n.e.c. excluding petroleum gas

Class 3520 note from source layer

This class includes the manufacture of gas, the storage and the distribution of natural or synthetic gas to the user through a system of mains. This class excludes: - extraction of crude natural gas, see 0620 - operation of coke ovens, see 1910 - manufacture of refined petroleum products and liquefied petroleum gas (LPGs), see 1920 - manufacture of industrial gases, see 2011 - activities of brokers or agents (intermediaries) that arrange the sale of natural gas via gas distribution systems operated by others, see 3540 - wholesale of bottled gaseous fuels, see 4671 - retail sale of gaseous fuel for motor vehicles and motorcycles, see 4730 - retail sale of household fuel oil and bottled gaseous fuels, see 4773 - transportation, usually over long-distance, of gas through by pipelines, see 4950 - The separate operation of gas pipelines, typically done over long distances, connecting producers with distributors of gas, or between urban centers, See 4950 - manufacture of basic organic gases, not for energy supply through a network, see 2011 - production of blast furnace gas, see 2410 - production of gas as by-product in landfills, see 3821