# The Planning (Hazardous Substances) Regulations 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/uksi/2015/627/schedule/1/part/4/paragraph/20 (the official version)
Page: https://openlegislation.uk/planning-hazardous-substances-regulations-2015/schedule-1/part-4/paragraph-20
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.