# Commission Implementing Decision (EU) 2017/2117 of 21 November 2017 establishing best available techniques (BAT) conclusions, under Directive 2010/75/EU of the European Parliament and of the Council, for the production of large volume organic chemicals (notified under document C(2017) 7469) (Text with EEA relevance), Division: Conversion to reference oxygen level

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

The emission concentration at the reference oxygen level is calculated using Equation 2:
Equation 2:
E R = 21 − O R 21 − O M × E M
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-%.

---
Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/n2/division/4 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-n2/division-4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.