# Commission Implementing Decision (EU) 2018/1147 of 10 August 2018 establishing best available techniques (BAT) conclusions for waste treatment, under Directive 2010/75/EU of the European Parliament and of the Council (notified under document C(2018) 5070) (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 stated otherwise, emission levels associated with the best available techniques (BAT-AELs) for emissions to air given in these BAT conclusions refer to concentrations (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 μg/Nm3 or mg/Nm3.
For averaging periods of BAT-AELs for emissions to air, the following definitions apply.
For any parameter where, due to sampling or analytical limitations, a 30-minute measurement is inappropriate, a more suitable measurement period may be employed (e.g. for the odour concentration). For PCDD/F or dioxin-like PCBs, one sampling period of 6 to 8 hours is used.
Type of measurement
Averaging period
Definition
Continuous
Daily average
Average over a period of one day based on valid hourly or half-hourly averages.
Periodic
Average over the sampling period
Average value of three consecutive measurements of at least 30 minutes each.
Where continuous measurement is used, the BAT-AELs may be expressed as daily averages.

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Source: https://www.legislation.gov.uk/eudn/2018/1147/annex/division/n3/division/2 (the official version)
Page: https://openlegislation.uk/eu-decision-2018-1147/annex/division-n3/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.