# Commission Implementing Decision (EU) 2019/2031 of 12 November 2019 establishing best available techniques (BAT) conclusions for the food, drink and milk industries, under Directive 2010/75/EU of the European Parliament and of the Council (notified under document C(2019) 7989) (Text with EEA relevance), Division: Emission levels associated with the best available techniques (BAT-AELs) for emissions to air

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

Unless otherwise stated, emission levels associated with the best available techniques (BAT-AELs) for emissions to air given in these BAT conclusions refer to concentrations, expressed as mass of emitted substances per volume of waste gas under the following standard conditions: dry gas at a temperature of 273,15 K and a pressure of 101,3 kPa, without correction for oxygen content, and expressed in mg/Nm3.
The equation for calculating the emission concentration at the reference oxygen level is:
where:
ER emission concentration at the reference oxygen level OR;
OR reference oxygen level in vol-%;
EM measured emission concentration;
OM measured oxygen level in vol-%.
For averaging periods of BAT-AELs for emissions to air, the following definition applies.
For any parameter where, due to sampling or analytical limitations, 30-minute sampling/measurement is inappropriate, a more suitable measurement period may be employed.
Averaging period
Definition
Average over the sampling period
Average value of three consecutive measurements of at least 30 minutes each .
When the waste gases of two or more sources (e.g. dryers or kilns) are discharged through a common stack, the BAT-AEL applies to the combined discharge from the stack.

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Source: https://www.legislation.gov.uk/eudn/2019/2031/annex/division/n3/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2019-2031/annex/division-n3/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.