# The Planning (Hazardous Substances) (No. 2) Regulations (Northern Ireland) 2015, Paragraph 20


Upgraded biogas
For the purpose of the implementation of these Regulations, upgraded biogas may be classified under entry 18 of Part 2 of this Schedule where it has been processed in accordance with applicable standards for purified and upgraded biogas ensuring a quality equivalent to that of natural gas, including the content of Methane, and which has a maximum of 1% Oxygen.

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Source: https://www.legislation.gov.uk/nisr/2015/344/schedule/2/paragraph/20 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-no-2-regulations-northern-ireland-2015/schedule-2/paragraph-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.