# 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 BAT 19:: In order to prevent or reduce emissions to air and water occurring during other than normal operating conditions, BAT is to implement measures commensurate with the relevance of potential pollutant releases for:

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

(i) start-up and shutdown operations;
(ii) other circumstances (e.g. regular and extraordinary maintenance work and cleaning operations of the units and/or of the waste gas treatment system) including those that could affect the proper functioning of the installation.

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/1/division/1.6/division/BAT+19 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-1/division-1.6/division-BAT+19
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.