# 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 68:: BAT is to monitor emissions to water with at least the frequency given below and in accordance with EN standards. If EN standards are not available, BAT is to use ISO, national or other international standards that ensure the provision of data of an equivalent scientific quality.

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

In the case of discontinuous waste water discharges, the minimum monitoring frequency is once per discharge.
Substance/Parameter
Plant
Sampling point
Standard(s)
Minimum monitoring frequency
Monitoring associated with
TOC
DNT plant
Outlet of the pretreatment unit
EN 1484
Once every week
BAT 70
MDI and/or TDI plant
Outlet of the plant
Once every month
BAT 72
Aniline
MDA plant
Outlet of the final waste water treatment
No EN standard available
Once every month
BAT 14
Chlorinated solvents
MDI and/or TDI plant
Various EN standards available (e.g. EN ISO 15680)
BAT 14

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/9/division/9.2/division/BAT+68 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-9/division-9.2/division-BAT+68
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.