# Commission Implementing Decision of 9 October 2014 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council on industrial emissions, for the refining of mineral oil and gas (notified under document C(2014) 7155) (Text with EEA relevance) (2014/738/EU), Division: Averaging periods and reference conditions 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, expressed as mass of emitted substance per volume of waste gas under the following standard conditions: dry gas, temperature of 273,15 K, pressure of 101,3 kPa.
For continuous measurements
BAT-AELs refer to monthly average values, which are the averages of all valid hourly average values measured over a period of one month
For periodic measurements
BAT-AELs refer to the average value of three spot samples of at least 30 minutes each
For combustion units, catalytic cracking processes, and waste gas sulphur recovery units, reference conditions for oxygen are shown in Table 1.
Table 1
Reference conditions for BAT-AELs concerning emissions to air
In case of applying BAT 58.
Activities
Unit
Oxygen reference conditions
Combustion unit using liquid or gaseous fuels with the exception of gas turbines and engines
mg/Nm3
3 % oxygen by volume
Combustion unit using solid fuels
mg/Nm3
6 % oxygen by volume
Gas turbines (including combined cycle gas turbines — CCGT) and engines
mg/Nm3
15 % oxygen by volume
Catalytic cracking process (regenerator)
mg/Nm3
3 % oxygen by volume
Waste gas sulphur recovery unit
mg/Nm3
3 % oxygen by volume

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Source: https://www.legislation.gov.uk/eudn/2014/738/annex/division/2/division/1 (the official version)
Page: https://openlegislation.uk/eu-decision-2014-738/annex/division-2/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.