# Commission Implementing Decision (EU) 2017/1442 of 31 July 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for large combustion plants (notified under document C(2017) 5225) (Text with EEA relevance), Division BAT 45: In order to reduce non-methane volatile organic compounds (NMVOC) and methane (CH4) emissions to air from the combustion of natural gas in spark-ignited lean-burn gas engines, BAT is to ensure optimised combustion and/or to use oxidation catalysts.

Extent: E+W+S+N.I.

Table 26
BAT-associated emission levels (BAT-AELs) for formaldehyde and CH4 emissions to air from the combustion of natural gas in a spark-ignited lean-burn gas engine
For existing plants operated < 500 h/yr, these levels are indicative.
This BAT-AEL is expressed as C at full load operation.
Combustion plant total rated thermal input (MWth)
BAT-AELs (mg/Nm3)
Formaldehyde
CH4
Average over the sampling period
New or existing plant
New plant
Existing plant
≥ 50
5–15
215–500
215–560

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Source: https://www.legislation.gov.uk/eudn/2017/1442/annex/division/4/division/4.1/division/4.1.2/division/5 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-1442/annex/division-4/division-4.1/division-4.1.2/division-5
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.