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.

United Kingdom

Substance/Parameter	Standard(s)^f1	Total rated thermal input (MW_th)^f2	Minimum monitoring frequency^f3	Monitoring associated with
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 MW_th 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.
CO	Generic EN standards	≥ 50	Continuous	Table 2.1, Table 10.1
CO	EN 15058	10 to < 50	Once every 3 months^f4	Table 2.1, Table 10.1
Dust^f5	Generic EN standards and EN 13284-2	≥ 50	Continuous	BAT 5
Dust^f5	EN 13284-1	10 to < 50	Once every 3 months	BAT 5
NH₃ ^f6	Generic EN standards	≥ 50	Continuous	BAT 7, Table 2.1
NH₃ ^f6	No EN standard available	10 to < 50	Once every 3 months	BAT 7, Table 2.1
NO_X	Generic EN standards	≥ 50	Continuous	BAT 4, Table 2.1, Table 10.1
NO_X	EN 14792	10 to < 50	Once every 3 months	BAT 4, Table 2.1, Table 10.1
SO₂ ^f7	Generic EN standards	≥ 50	Continuous	BAT 6
SO₂ ^f7	EN 14791	10 to < 50	Once every 3 months	BAT 6

Annotations

Footnotes

f1: 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.
f2: Refers to the total rated thermal input of all process furnaces/heaters connected to the stack where emissions occur.
f3: In the case of process furnaces/heaters with a total rated thermal input of less than 100 MW_th operated less than 500 hours per year, the monitoring frequency may be reduced to at least once every year.
f4: 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.
f5: Monitoring of dust does not apply when combusting exclusively gaseous fuels.
f6: Monitoring of NH₃ only applies when SCR or SNCR is used.
f7: 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.