# 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 1:: BAT is to monitor channelled emissions to air 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.

Generic EN standards for continuous measurements are EN 15267-1, -2, and -3, and EN 14181. EN standards for periodic measurements are given in the table.
Refers to the total rated thermal input of all process furnaces/heaters connected to the stack where emissions occur.
In the case of process furnaces/heaters with a total rated thermal input of less than 100 MWth operated less than 500 hours per year, the monitoring frequency may be reduced to at least once every year.
The minimum monitoring frequency for periodic measurements may be reduced to once every 6 months, if the emission levels are proven to be sufficiently stable.
Monitoring of dust does not apply when combusting exclusively gaseous fuels.
Monitoring of NH3 only applies when SCR or SNCR is used.
In the case of process furnaces/heaters combusting gaseous fuels and/or oil with a known sulphur content and where no flue-gas desulphurisation is carried out, continuous monitoring can be replaced either by periodic monitoring with a minimum frequency of once every 3 months or by calculation ensuring the provision of data of an equivalent scientific quality.
Substance/Parameter
Standard(s)
Total rated thermal input (MWth)
Minimum monitoring frequency
Monitoring associated with
CO
Generic EN standards
≥ 50
Continuous
Table 2.1,
Table 10.1
EN 15058
10 to < 50
Once every 3 months
Dust
Generic EN standards and EN 13284-2
≥ 50
Continuous
BAT 5
EN 13284-1
10 to < 50
Once every 3 months
NH3
Generic EN standards
≥ 50
Continuous
BAT 7,
Table 2.1
No EN standard available
10 to < 50
Once every 3 months
NOX
Generic EN standards
≥ 50
Continuous
BAT 4,
Table 2.1,
Table 10.1
EN 14792
10 to < 50
Once every 3 months
SO2
Generic EN standards
≥ 50
Continuous
BAT 6
EN 14791
10 to < 50
Once every 3 months

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