# 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 2:: BAT is to monitor channelled emissions to air other than from process furnaces/heaters in accordance with EN standards and with at least the minimum frequency given in the table below. 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.

The monitoring applies where the pollutant is present in the waste gas based on the inventory of waste gas streams specified by the CWW BAT conclusions.
The minimum monitoring frequency for periodic measurements may be reduced to once every year, if the emission levels are proven to be sufficiently stable.
All (other) processes/sources where the pollutant is present in the waste gas based on the inventory of waste gas streams specified by the CWW BAT conclusions.
EN 15058 and the sampling period need adaptation so that the measured values are representative of the whole decoking cycle.
EN 13284-1 and the sampling period need adaptation so that the measured values are representative of the whole decoking cycle.
The monitoring applies where the chlorine and/or chlorinated compounds are present in the waste gas and thermal treatment is applied
Substance/Parameter
Processes/Sources
Standard(s)
Minimum monitoring frequency
Monitoring associated with
Benzene
Waste gas from the cumene oxidation unit in phenol production
No EN standard available
Once every month
BAT 57
All other processes/sources
BAT 10
Cl2
TDI/MDI
No EN standard available
Once every month
BAT 66
EDC/VCM
BAT 76
CO
Thermal oxidiser
EN 15058
Once every month
BAT 13
Lower olefins (decoking)
No EN standard available
Once every year or once during decoking, if decoking is less frequent
BAT 20
EDC/VCM (decoking)
BAT 78
Dust
Lower olefins (decoking)
No EN standard available
Once every year or once during decoking, if decoking is less frequent
BAT 20
EDC/VCM (decoking)
BAT 78
All other processes/sources
EN 13284-1
Once every month
BAT 11
EDC
EDC/VCM
No EN standard available
Once every month
BAT 76
Ethylene oxide
Ethylene oxide and ethylene glycols
No EN standard available
Once every month
BAT 52
Formaldehyde
Formaldehyde
No EN standard available
Once every month
BAT 45
Gaseous chlorides, expressed as HCl
TDI/MDI
EN 1911
Once every month
BAT 66
EDC/VCM
BAT 76
All other processes/sources
BAT 12
NH3
Use of SCR or SNCR
No EN standard available
Once every month
BAT 7
NOX
Thermal oxidiser
EN 14792
Once every month
BAT 13
PCDD/F
TDI/MDI
EN 1948-1, -2, and -3
Once every 6 months
BAT 67
PCDD/F
EDC/VCM
BAT 77
SO2
All processes/sources
EN 14791
Once every month
BAT 12
Tetrachloromethane
TDI/MDI
No EN standard available
Once every month
BAT 66
TVOC
TDI/MDI
EN 12619
Once every month
BAT 66
EO (desorption of CO2 from scrubbing medium)
Once every 6 months
BAT 51
Formaldehyde
Once every month
BAT 45
Waste gas from the cumene oxidation unit in phenol production
EN 12619
Once every month
BAT 57
Waste gas from other sources in phenol production when not combined with other waste gas streams
Once every year
Waste gas from the oxidation unit in hydrogen peroxide production
Once every month
BAT 86
EDC/VCM
Once every month
BAT 76
All other processes/sources
Once every month
BAT 10
VCM
EDC/VCM
No EN standard available
Once every month
BAT 76

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Source: https://www.legislation.gov.uk/eudn/2017/2117/annex/division/1/division/1.1/division/BAT+2 (the official version)
Page: https://openlegislation.uk/eu-decision-2017-2117/annex/division-1/division-1.1/division-BAT+2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.