Paragraph 21 Special provisions for combustion plants co-incinerating wasteF1

(1)

C_proc is to be expressed as a daily average values (mg/Nm³).

(2)

The aggregation rules in paragraph 3 of schedule 21 apply to determining the total rated thermal input of combustion plants.

(3)

Half-hourly average values are only needed for the purpose of calculating the daily average values.

(4)

C_proc for combustion plants referred to in paragraph 6(1) of schedule 21, with the exception of gas turbines and gas engines, are as set out in Table 6—

Table 6

C_proc for solid fuels with the exception of biomass (O2 content: 6%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	400 300 for peat	200	200
NO_x	-	300 400 for pulverised lignite	200	200
Dust	50	30	25 For peat: 20	20
C_proc for biomass (O₂ content: 6%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	200	200	200
No_x	-	300	250	200
Dust	50	30	20	20
C_proc for liquid fuels (O₂ content: 3%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	350	250	200
NO_x	-	400	200	150
Dust	50	30	25	20

(5)

C_proc for combustion plants referred to in paragraph 6(2) of schedule 21, with the exception of gas turbines and gas engines, are as set out in Table 7—

Table 7

Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
C_proc for solid fuels with the exception of biomass (O₂ content: 6%)
SO₂	-	400 300 for peat	200 300 for peat, except in the case of fluidised bed combustion: 250	150 for circulating or pressurised fluidised bed combustion or, in the case of peat firing, for all fluidised bed combustion: 200
NO_x	_	300 For peat: 250	200	150 For pulverised lignite combustion: 200
Dust	50	20	20	10 For peat: 20
C_procfor biomass (O₂ content: 6%)
So₂	-	200	200	150
NO_x	-	250	200	150
Dust	50	20	20	20
C_proc for liquid fuels (O₂ content: 3%)
So₂	-	350	200	150
NO_x	-	300	150	100
Dust	50	20	20	10

(6)

Total emission limit values (C) for heavy metals (mg/Nm³) expressed as average values over the sampling period of a minimum of 30 minutes and a maximum of 8 hours (O₂ content 6% for solid fuels and 3% for liquid fuels) is as provided for in Table 8—

Table 8

Polluting substances	C
Cd + Tl	0.05
Hg	0.05
Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V	0.5

(7)

Total emission limit value (ng/Nm³) for dioxins and furans expressed as average value measured over the sampling period of a minimum of 6 hours and a maximum of 8 hours (O₂ content 6% for solid fuels and 3% for liquid fuels) is 0.1.

Annotations

Textual amendments

F1: Sch. 22 inserted (1.11.2025) by The Environmental Authorisations (Scotland) Amendment Regulations 2025 (S.S.I. 2025/165), reg. 1(2), sch. 13 (with sch. 23)