The Environmental Authorisations (Scotland) Regulations 2018

• (viii) other gases, with specification of type.

Start-up and shut-down periods

15

The determination of start-up and shut-down periods for large combustion plants is to be in accordance with Commission Implementing Decision of 7 May 2012 concerning the determination of start-up and shut-down periods for the purposes of the Industrial Emissions Directive.

PART3 — Technical provisions relating to combustion plants

CHAPTER1 — Emission limit values for combustion plants referred to in paragraph 6(1)

Calculation of emission limit values

16

All emission limit values are to be calculated—

• (a) at a temperature of 273.15K,

• (b) a pressure of 101.3kPa,

• (c) after correction for the water vapour content of the waste gases, and

• (d) at a standardised O₂ content of—

• (i) 6% for solid fuels,

• (ii) 3% for combustion plants, other than gas turbines and gas engines using liquid and gaseous fuels,

• (iii) 15% for gas turbines and gas engines.

Emission limit values for SO2 for combustion plants using solid or liquid fuels (with the exception of gas turbines and gas engines)

17

• (1) Emission limit values (mg/Nm³) for SO₂ for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines where the circumstances in sub-paragraphs (2) to (4) do not apply are as stated in Table 1—

Total rated thermal input (MW)	Coal and lignite and other solid fuels	Biomass	Peat	Liquid Fuels
50-100	400	200	300	350
100-300	250	200	300	250
>300	200	200	200	200

• (2) Combustion plants, using solid fuels which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for SO₂ of 800 mg/Nm³.

• (3) Combustion plants using liquid fuels, which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for SO₂ of 850 mg/Nm³ in case of plants with a total rated thermal input not exceeding 300 MW and of 400 mg/Nm³ in case of plants with a total rated thermal input greater than 300 MW.

• (4) A part of a combustion plant discharging its waste gases through one or more separate flues within a common stack, and which does not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, may be subject to the emission limit values set out in sub-paragraphs (2) and (3) in relation to the total rated thermal input of the entire combustion plant.

• (5) Where sub-paragraph (4) applies, the emissions through each of those flues must be monitored separately.

Emission limit values for SO2 combustion plants using gaseous fuels (with the exception of gas turbines and gas engines)

18

• (1) Emission limit values (mg/Nm³) for SO₂ for combustion plants using gaseous fuels with the exception of gas turbines and gas engines are, unless the circumstances in sub-paragraph (2) apply, as stated in Table 2—

In general	35
Liquefied gas	5
Low calorific gases from coke oven	400
Low calorific gases from blast furnace	200

• (2) Combustion plants, firing low calorific gases from gasification of refinery residues, which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, are subject to an emission limit value for SO₂ of 800 mg/Nm³.

Emission limit values for NOx for combustion plants using solid or liquid fuels (with the exception of gas turbines and gas engines)

19

• (1) Emission limit values (mg/Nm³) for NOx for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are, unless the circumstances in sub-paragraphs (2) to (6) are as stated in Table 3—

Total rated thermal input (MW)	Coal and lignite and other solid fuels	Biomass and Peat	Liquid fuels
(1)The emission limit value is 450 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 450 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 450 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 450 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.
500-100	300450 in case of pulverised lignite combustion	300	450
100-300	200	250	200[^f01032]
>300	200	200	150[^f01032]

• (2) Combustion plants in chemical installations using liquid production residues as non-commercial fuel for own consumption with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, are subject to an emission limit value for NOx of 450 mg/Nm³.

• (3) Combustion plants using solid or liquid fuels with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 450 mg/Nm³.

• (4) Combustion plants using solid fuels with a total rated thermal input greater than 500 MW, which were granted a permit before 1 July 1987 and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 450 mg/Nm³.

• (5) Combustion plants using liquid fuels, with a total rated thermal input greater than 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 400 mg/Nm³.

• (6) A part of a combustion plant discharging its waste gases through one or more separate flues within a common stack, and which does not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, may be subject to the emission limit values set out in sub-paragraphs (3) to (5) in relation to the total rated thermal input of the entire combustion plant.

• (7) Where sub-paragraph (6) applies, the emissions through each of those flues must be monitored separately.

Emission limit values for gas turbines using light and middle distillates as liquid fuels

20

• (1) Gas turbines (including CCGT) using light and middle distillates as liquid fuels are subject to an emission limit value for NOx of 90 mg/Nm³ and for CO of 100 mg/Nm³ unless the circumstances in sub-paragraph (2) apply.

• (2) Gas turbines for emergency use that operate less than 500 operating hours per year are not covered by the emission limit values set out in this paragraph.

Emission limit values for NOx and CO for gas fired combustion plants

21

• (1) The emission limit values (mg/Nm³) for NOx and CO for gas fired combustion plants, unless the circumstances in sub-paragraphs (2) to (4) apply are as set out in Table 4—

	NOx	CO
(1)Natural gas is naturally occurring methane with not more than 20% (by volume) of inerts and other constituents.	(1)Natural gas is naturally occurring methane with not more than 20% (by volume) of inerts and other constituents.	(1)Natural gas is naturally occurring methane with not more than 20% (by volume) of inerts and other constituents.
(2)75 mg/Nm³ in the following cases, where the efficiency of the gas turbine is determined at ISO baseload conditions:	(2)75 mg/Nm³ in the following cases, where the efficiency of the gas turbine is determined at ISO baseload conditions:	(2)75 mg/Nm³ in the following cases, where the efficiency of the gas turbine is determined at ISO baseload conditions:
(i) gas turbines, used in combined heat and power systems having an overall efficiency greater than 75%,	(i) gas turbines, used in combined heat and power systems having an overall efficiency greater than 75%,	(i) gas turbines, used in combined heat and power systems having an overall efficiency greater than 75%,
(ii) gas turbines used in combined cycle plants having an annual average overall electrical efficiency greater than 55%,	(ii) gas turbines used in combined cycle plants having an annual average overall electrical efficiency greater than 55%,	(ii) gas turbines used in combined cycle plants having an annual average overall electrical efficiency greater than 55%,
(iii) gas turbines for mechanical drives.	(iii) gas turbines for mechanical drives.	(iii) gas turbines for mechanical drives.
(3)For single cycle gas turbines not falling into any of the categories mentioned under note (2) but having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.	(3)For single cycle gas turbines not falling into any of the categories mentioned under note (2) but having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.	(3)For single cycle gas turbines not falling into any of the categories mentioned under note (2) but having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.
(4)300 mg/Nm³ for such combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or the operators of which had submitted a complete application for a permit before that date, provided that the plant was put into operation no later than 27 November 2003.	(4)300 mg/Nm³ for such combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or the operators of which had submitted a complete application for a permit before that date, provided that the plant was put into operation no later than 27 November 2003.	(4)300 mg/Nm³ for such combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or the operators of which had submitted a complete application for a permit before that date, provided that the plant was put into operation no later than 27 November 2003.
Combustion plants firing natural gas with the exception of gas turbines and gas engines	100	100
Combustion plants firing blast furnace gas, coke oven gas or low calorific gases from gasification of refinery residues, with the exception of gas turbines and gas engines	200[^f01039]	_
Combustion plants firing other gases, with the exception of gas turbines and gas engines	200[^f01039]	_
Gas turbines (including CCGT), using natural gas[^f01033] as fuel	50[^f01034][^f01038]	100
Gas turbines (including CCGT), using other gases as fuel	120	_
Gas engines	100	100

• (2) For gas turbines (including CCGT), the NOx and CO emission limit values set out in the table contained in this paragraph apply only above 70% load.

• (3) For gas turbines (including CCGT) which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, the emission limit value for NOx is 150 mg/Nm³ when firing natural gas and 200 mg/Nm³ when firing other gases or liquid fuels.

• (4) A part of a combustion plant discharging its waste gases through one or more separate flues within a common stack, and which does not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, may be subject to the emission limit values set out in sub-paragraphs (2) and (3) in relation to the total rated thermal input of the entire combustion plant.

• (5) Where sub-paragraph (4) applies, the emissions through each of those flues must be monitored separately.

• (6) Gas turbines and gas engines for emergency use that operate less than 500 operating hours per year are not covered by the emission limit values set out in this paragraph.

Emission limit values for dust for combustion plants using solid or liquid fuels (except gas turbines and gas engines)

22

Emission limit values (mg/Nm³) for dust for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are as set out in Table 5—

Total rated thermal input (MW)	Coal and lignite and other solid fuels	Biomass and peat	Liquid fuels[^f01040]
(1)The emission limit value is 50 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude oil for own consumption in combustion plants which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 50 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude oil for own consumption in combustion plants which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 50 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude oil for own consumption in combustion plants which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.	(1)The emission limit value is 50 mg/Nm³ for the firing of distillation and conversion residues from the refining of crude oil for own consumption in combustion plants which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.
50-100	30	30	30
100-300	25	20	25
>300	20	20	20

Emission limit values for dust for combustion plants using gaseous fuels (except gas turbines and gas engines)

23

Emission limit values (mg/Nm³) for dust for combustion plants using gaseous fuels with the exception of gas turbines and gas engines are as set out in Table 6—

In general	5
Blast furnace gas	10
Gases produced by the steel industry which can be used elsewhere	30

CHAPTER2 — Emission limit values for combustion plants referred to in paragraphs 7(2) and 7(3)

Calculation of emission limit values

24

• (1) All emission limit values are to be calculated—

• (a) at a temperature of 273.15K,

• (b) a pressure of 101.3kPa,

• (c) after correction for the water vapour content of the waste gases,

• (d) at a standardised O₂ content of—

• (i) 6% for solid fuels,

• (ii) 3% for combustion plants other than gas turbines and gas engines using liquid and gaseous fuels,

• (iii) 15% for gas turbines and gas engines.

• (2) In case of combined cycle gas turbines with supplementary firing, the standardised O₂ content may be defined by SEPA, taking into account the specific characteristics of the installation concerned.

Emission limit values for SO2 combustion plants using solid or liquid fuels (except gas turbines and gas engines)

25

Emission limit values (mg/Nm³) for SO₂ for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are as set out in Table 7—

Total rated thermal input (MW)	Coal and lignite and other solid fuels	Biomass	Peat	Liquid fuels
50-100	400	200	300	350
100-300	200	200	300250 in case of fluidised bed combustion	200
>300	150200 in case of circulating or pressurised fluidised bed combustion	150	150200 in case of fluidised bed combustion	150

Emission limit values for SO2 combustion plants using gaseous fuels (except gas turbines and gas engines)

26

Emission limit values (mg/Nm³) for SO₂ for combustion plants using gaseous fuels with the exception of gas turbines and gas engines are as set out in Table 8—

In general	35
Liquified gas	5
Low calorific gases from coke oven	400
Low calorific gases from blast furnace	200

Emission limit values for NOx for combustion plants using solid or liquid fuels (except gas turbines and gas engines)

27

Emission limit values (mg/Nm³) for NOx for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are as set out in Table 9—

Total rated thermal input (MW)	Coal and lignite and other solid fuels	Biomass and peat	Liquid fuels
50-100	300400 in case of pulverisedlignite combustion	250	300
100-300	200	200	150
>300	150200 in case of pulverisedlignite combustion	150	100

Emission limit values for NOx and CO for gas turbines (including CCGT) using middle and light distillates as liquid fuels

28

• (1) Gas turbines (including CCGT) using light and middle distillates as liquid fuels are subject to an emission limit value for NOx of 50 mg/Nm³ and for CO of 100 mg/Nm³.

• (2) Gas turbines for emergency use that operate less than 500 operating hours per year are not covered by the emission limit values set out in this paragraph.

29

• (1) Emission limit values (mg/Nm³) for NOx and CO for gas fired combustion plants are as set out in Table 10—

	NOx	CO
(1)For single cycle gas turbines having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.	(1)For single cycle gas turbines having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.	(1)For single cycle gas turbines having an efficiency greater than 35% – determined at ISO base load conditions – the emission limit value for NOx is 50xη/35 where η is the gas turbine efficiency at ISO base load conditions expressed as a percentage.
Combustion plants other than gas turbinesand gas engines	100	100
Gas turbines (including CCGT)	50[^f01041]	100
Gas engines	75	100

• (2) For gas turbines (including CCGT), the NOx and CO emission limit values set out in this point apply only above 70% load.

• (3) Gas turbines and gas engines for emergency use that operate less than 500 operating hours per year are not covered by the emission limit values set out in this paragraph.

Emission limit values for dust for combustion plants using solid or liquid fuels (except gas turbines and gas engines)

30

Emission limit values (mg/Nm³) for dust for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are as set out in Table 11—

Total rated thermal input (MW)
50-300	20
>300	1020 for biomass and peat

Emission limit values for dust for combustion plants using gaseous fuels (except gas turbines and gas engines)

31

Emission limit values (mg/Nm³) for dust for combustion plants using gaseous fuels with the exception of gas turbines and gas engines are as set out in Table 12—

In general	5
Blast furnace gas	10
Gases produced by the steel industry which can be used elsewhere	30

CHAPTER3 — Emission monitoring

Measurements

32

• (1) The concentrations of SO₂, NOx and dust in waste gases from each combustion plant with a total rated thermal input of 100 MW or more must be measured continuously unless sub-paragraph (3) applies.

• (2) The concentration of CO in waste gases from each combustion plant firing gaseous fuels with a total rated thermal input of 100 MW or more must be measured continuously unless sub-paragraph (3) applies.

• (3) SEPA may elect not to require the continuous measurements required by sub-paragraphs (1) and (2) in the following cases—

• (a) for combustion plants with a life span of less than 10,000 operational hours,

• (b) for SO₂ and dust from combustion plants firing natural gas,

• (c) for SO₂ from combustion plants firing oil with known sulphur content in cases where there is no waste gas desulphurisation equipment,

• (d) for SO₂ from combustion plants firing biomass if the operator can prove that the SO₂ emissions can under no circumstances be higher than the prescribed emission limit values,

• (4) where SEPA does not require continuous measurements, measurements of dust and, for gas fired plants, CO are required at least once every 6 months,

• (5) where SEPA does not require continuous measurements, measurements of SO₂ andNOx are—

• (a) required at least once every 6 months, unless head (b) applies,

• (b) this sub-paragraph applies where SEPA has verified and approved of other procedures to determine SO₂ and NOx emissions,

• (c) where SEPA has verified and approved of other procedures, procedures must—

• (i) use relevant CEN standards or British standards,

• (ii) when relevant CEN or British standards are not available, ISO or other international standards which ensure the provision of data of an equivalent scientific quality.

• (6) For combustion plants firing coal or lignite, the emissions of total mercury must be measured at least once per year.

Changes in fuel used or mode of operation of the plant

33

• (1) SEPA must be informed of significant changes in the type of fuel used or in the mode of operation of the plant.

• (2) Where informed of a significant change in accordance with sub-paragraph (1), SEPA must decide whether the monitoring requirements in paragraph 32(1) to (4) and (6) of this schedule are still adequate or require to be adjusted.

Measurement of oxygen content, temperature, pressure and water vapour content of waste gases

34

• (1) Continuous measurements carried out in accordance with paragraph 32(1) and (2) of this schedule must include the measurement of the oxygen content, temperature, pressure and water vapour content of the waste gases unless sub-paragraph (2) applies.

• (2) The continuous measurement of the water vapour content of the waste gases is not necessary where the sampled waste gas is dried before the emissions are analysed.

Relevant standards

35

• (1) The following procedures must be carried out in accordance with relevant CEN or British standards, or where those are not available, ISO or other international standards which ensure the provision of data of an equivalent scientific quality—

• (a) sampling and analysis of relevant polluting substances,

• (b) measurements of process parameters,

• (c) quality assurance of automated measuring systems and the reference measurement methods to calibrate those systems.

• (2) Automated measuring systems must also be subject to control by means of parallel measurements with the reference methods at least once per year.

Confident interval values

36

At the emission limit value level, the values of the 95% confidence intervals of a single measured result must not exceed the following percentages of the emission limit values—

• (a) carbon monoxide 10%,

• (b) sulphur dioxide 20%,

• (c) nitrogen oxides 20%,

• (d) dust 30%.

Validated hourly and daily averages

37

• (1) The validated hourly and daily average values are to be determined from the measured valid hourly average values after having subtracted the value of the confidence interval specified in paragraph 36 of this schedule.

• (2) Any day in which more than three hourly average values are invalid due to malfunction or maintenance of the automated measuring system must be invalidated.

Sulphur content

38

Where plants are required to comply with the rates of desulphurisation in paragraph 9 of this schedule, the sulphur content of the fuel which is fired in the combustion plant must also be regularly monitored.

CHAPTER4 — Assessment of compliance with emission limit values

39

• (1) For continuous measurements, the emission limit values set out in Chapters 1 and 2 of this schedule are to be regarded as having been complied with if the evaluation of the measurement results indicates, for operating hours within a calendar year, that all of the following conditions have been met—

• (a) no validated monthly average value exceeds the relevant emission limit values set out in Chapters 1 and 2 of this schedule,

• (b) no validated daily average value exceeds 110% of the relevant emission limit values set out in Chapters 1 and 2 of this schedule,

• (c) in cases of combustion plants composed only of boilers using coal with a total rated thermal input below 50 MW, no validated daily average value exceeds 150% of the relevant emission limit values set out in Chapters 1 and 2 of this schedule,

• (d) 95% of all the validated hourly average values over the year do not exceed 200% of the relevant emission limit values set out in Chapters 1 and 2 of this schedule,

• (e) validated average values are determined as set out in paragraph 37 of this schedule,

• (f) for the purpose of the calculation of the average emission values, the values measured during the periods referred to in paragraphs 8 and 11 of this schedule as well as during the start-up and shut-down periods are to be disregarded.

• (2) Where continuous measurements are not required, the emission limit values set out in Chapters 1 and 2 of this schedule are to be regarded as having been complied with if the results of each of the series of measurements or of the other procedures defined and determined according to the rules laid down by SEPA do not exceed the emission limit values.

CHAPTER5 — Minimum rate of desulphurisation

40

Minimum rate of desulphurisation for combustion plants referred to in paragraphs 6(1) and (2) of this schedule is as stated in Table 13—

	Minimum rate ofdesulphurisation	Minimum rate ofdesulphurisation
(1)For combustion plants firing oil shale, the minimum rate of desulphurisation is 95%	(1)For combustion plants firing oil shale, the minimum rate of desulphurisation is 95%	(1)For combustion plants firing oil shale, the minimum rate of desulphurisation is 95%
Total rated thermal input (MW)	Plants which were granted a permit before27 November 2002 or those where a complete application for a permit was submitted beforethat date, provided that the plant was put intooperation no later than 27 November 2003	Other plants
50-100	80%	92%
100-300	90%	92%
>300	96%[^f01042]	96%

41

The minimum rate of desulphurisation for combustion plants referred to in paragraph 6(3) of this schedule are as set out in Table 14—

Total rated thermal input (MW)	Minimum rate of desulphurisation
50—100	93%
100-300	93%
>300	97%

42

The minimum rates of desulphurisation set out in this Chapter apply as a monthly average limit value.

CHAPTER6 — Average emission limit values for multi-fuel combustion plants within a refinery

43

• (1) Average emission limit values (mg/Nm³) for SO₂ for multi-fuel firing combustion plants within a refinery, with the exception of gas turbines and gas engines, which use the distillation and conversion residues from the refining of crude-oil for own consumption, alone or with other fuels—

• (a) for combustion plants which were granted a permit before 27 November 2002 or the operators of which had submitted a complete application for a permit before that date, provided that the plant was put into operation no later than 27 November 2003 is 1000 mg/Nm³,

• (b) for other combustion plants: 600 mg/Nm³.

• (2) These emission limit values are to be calculated at—

• (a) a temperature of 273.15K,

• (b) a pressure of 101.3kPa,

• (c) after correction for the water vapour content of the waste gases and

• (d) at a standardised O₂ content of—

• (i) 6% for solid fuels,

• (ii) 3% for liquid and gaseous fuels.

SCHEDULE22 — INCINERATION AND CO-INCINERATION OF WASTE AT A WASTE INCINERATION PLANT OR WASTE CO-INCINERATION PLANT

PART1 — Scope and Interpretation

Scope

1

• (1) This schedule applies to the incineration and co-incineration of solid and liquid waste at a waste incineration plant or waste co-incineration plant.

• (2) Paragraph 2 applies for the interpretation of—

• (a) this schedule,

• (b) the definition of the activity of incineration and co-incineration of solid and liquid waste at a waste incineration plant or waste co-incineration plant.

2

Incineration and co-incineration of solid and liquid waste at a waste incineration plant or waste co-incineration plant does not include the following activities—

• (a) the treatment by incineration or co-incineration of only the following waste—

• (i) biomass,

• (ii) radioactive waste,

• (iii) animal carcasses as regulated by Regulation (EC) No. 1069/2009 of the European Parliament and of the Council of 21 October 2009 laying down health rules concerning animal by-products not intended for human consumption and repealing Regulation (EC) No. 1774/2002,

• (iv) waste resulting from the exploration for, and the exploitation of, oil and gas resources from offshore installations, which is incinerated on board these installations,

• (b) incineration at experimental plants used for research, development and testing in order to improve the incineration process and which treat less than 50 tonnes of waste per year,

• (c) gasification or pyrolysis, where resulting gases from this thermal treatment of waste are purified to the extent that they are no longer waste prior to their incineration and can cause emissions no higher than those resulting from the burning of natural gas.

Interpretation: general

3

• (1) In this schedule—

• “dioxins and furans” means all polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans listed in Chapter 2 of Part 3 of this schedule,

• “nominal capacity” means the sum of the incineration capacities of the combustion chambers of which a waste incineration plant or a waste co-incineration plant is composed, as specified by the constructor and confirmed by the authorised person, with due account being taken of the calorific value of the waste, expressed as the quantity of waste incinerated per hour,

• “residue” means any liquid or solid waste which is generated by a waste incineration plant or waste co-incineration plant,

• “separately collected waste” means waste that has been collected and transported in accordance with section 34(2I) of the Environmental Protection Act 1990.

• (2) For the purposes of this schedule—

• (a) the definitions “waste incineration plant” and “waste co-incineration plant” include all incineration lines or co-incineration lines, waste reception, storage, on site pre-treatment facilities, waste-, fuel- and air-supply systems, boilers, facilities for the treatment of waste gases, on-site facilities for treatment or storage of residues and waste water, stacks, devices and systems for controlling incineration or co-incineration operations, recording and monitoring incineration or co-incineration conditions,

• (b) where processes other than oxidation, such as pyrolysis, gasification or plasma process are applied for the thermal treatment of waste, the waste incineration or waste co-incineration plant includes the thermal treatment process and subsequent incineration processes,

• (c) if waste co-incineration takes place in such a way that the main purpose of the plant is not the generation of energy or production of material products but rather the thermal treatment of waste, the plant is to be regarded as a waste incineration plant.

PART2 — Amendments to common framework provisions

Authorisations: applications

4

An application for an authorisation must include a description of measures to ensure that the following requirements will be met—

• (a) the waste incineration plant or waste co-incineration plant is designed, equipped and will be maintained and operated in such a manner that the requirements of this schedule are met, taking into account the categories of waste to be incinerated or co-incinerated,

• (b) the heat generated during the incineration and co-incineration process is recovered as far as practicable through the generation of heat, steam or power,

• (c) the residues will be minimised in their amount and harmfulness and recycled where appropriate,

• (d) the disposal of the residues which cannot be prevented, reduced or recycled will be carried out in conformity with all applicable law.

Authorisations: general conditions

5

• (1) SEPA must ensure that all authorisations contain the following—

• (a) a list of all types of waste which may be treated using at least the types of waste set out in the List of Waste in Annex I to the 2000 Commission Decision, where possible, and containing information on the quantity of each type of waste, where appropriate,

• (b) the total waste incinerating or co-incinerating capacity of the plant,

• (c) the limit values for emissions into air and water,

• (d) the requirements for the pH, temperature and flow of wastewater discharges,

• (e) the sampling and measurement procedures and frequencies to be used to comply with the conditions set for emission monitoring,

• (f) the maximum permissible period of any technically unavoidable stoppages, disturbances, or failures of the purification devices or the measurement devices, during which the emissions into the air and the discharges of wastewater may exceed the prescribed emission limit values,

• (g) a requirement that in the event of a breakdown, operations are to be reduced or stopped as soon as practicable until normal operations can be restored,

• (h) a requirement that the waste incineration plant or waste co-incineration plant is operated and controlled by a natural person who is technically competent to manage the plant.

• (2) SEPA must ensure that an authorisation for the incineration or co-incineration of hazardous waste at a waste incineration plant or waste co-incineration plant includes the following additional conditions—

• (a) a list of the quantities of the different categories of hazardous waste which may be treated,

• (b) the minimum and maximum mass flows of those hazardous wastes, their lowest and maximum calorific values and their maximum contents of polychlorinated biphenyls, pentachlorophenol, chlorine, fluorine, sulphur, heavy metals and other polluting substances.

• (3) SEPA must ensure that an authorisation for the incineration or co-incineration of municipal waste includes such additional conditions as it considers necessary to ensure, where practicable, that no waste including non-ferrous metals or hard plastics is incinerated or co-incinerated.

• (4) SEPA must ensure that an authorisation for the incineration or co-incineration of waste with energy recovery includes such additional conditions as it considers necessary to ensure that the recovery of energy takes place with a high level of energy efficiency.

Authorisations: control of emissions

6

SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that

• (a) waste gases are to be discharged in a controlled way by means of a stack the height of which is calculated in such a way as to safeguard human health and the environment,

• (b) emissions into air do not exceed the emission limit values set out in Chapters 3 and 4 of Part 3 of this schedule or are determined in accordance with Chapter 4 of Part 3 of this schedule,

• (c) where in a waste co-incineration plant more than 40% of the resulting heat release comes from hazardous waste, or where the plant co-incinerates untreated mixed municipal waste, the emission limit values set out in Chapter 3 of Part 3 of this schedule apply,

• (d) discharges to the aquatic environment of wastewater resulting from the cleaning of waste gases are limited as far as practicable and the concentrations of polluting substances does not exceed the emission limit values set out in Chapter 5 of Part 3 of this schedule at the point where waste waters from the cleaning of waste gases are discharged from the plant,

• (e) where waste waters from the cleaning of waste gases are treated outside the waste incineration or co-incineration plant, at a treatment plant intended only for the treatment of this sort of waste water, the emission limit values set out in Chapter 5 of Part 3 of this schedule are to be applied at the point where the waste waters leave the treatment plant,

• (f) where waste waters from the cleaning of waste gases are treated collectively with other sources of waste water, either on site or off site, the authorised person must make the appropriate mass balance calculations, using the results of the measurements set out in paragraph 27 of this schedule in order to determine the emission levels in the final waste water discharge that can be attributed to the waste water arising from the cleaning of waste gases,

• (g) for the purpose of complying with the emission limit values set out in Chapter 5 of Part 3 of this schedule, wastewater is not to be diluted,

• (h) waste incineration plant and co-incineration plant sites, including associated storage areas for waste, must be designed and operated in such a way as to prevent the unauthorised and accidental release of any polluting substances into soil, surface water and groundwater,

• (i) storage capacity must be provided for contaminated rainwater run-off from the waste incineration plant site or waste co-incineration plant site or for contaminated water arising from spillage or fire-fighting operations,

• (j) the storage capacity referred to in sub-paragraph (i) must be adequate to ensure that such waters can be tested and treated before discharge where necessary,

• (k) without prejudice to paragraph 8(1)(j)(iii) of this schedule, the plant or individual combustion chambers being part of a waste incineration plant or waste co-incineration plant must not continue to incinerate waste for a period of more than 4 hours uninterrupted where emission limit values are exceeded,

• (l) where one or more combustion chambers are linked to a single waste gas cleaning device, the cumulative duration of operation in conditions where emission limit values are exceeded must not exceed 60 hours over one year,

• (m) compliance with emission limit values for air and water is achieved where the conditions described in Chapter 8 of Part 3 of this schedule are satisfied.

Authorisations: emissions monitoring

7

SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that—

• (a) the monitoring of emissions is carried out in accordance with Chapters 6 and 7 of Part 3 of this schedule,

• (b) the installation and functioning of automated measuring systems is subject to control and to annual surveillance tests as set out in paragraph 25 of this schedule,

• (c) the location of the sampling or measurement points to be used for monitoring of emissions are designated,

• (d) the monitoring results are recorded, processed and presented in such a way as to enable SEPA to verify compliance with the operating conditions and emission limit values included in the authorisation,

• (e) continuous measurement of emissions into the air of the following—

• (i) heavy metals,

• (ii) dioxins,

• (iii) furans,

• (iv) dioxin-like polychlorinated biphenyls,

• (v) polycyclic aromatic hydrocarbons.

Authorisations: operating conditions

8

• (1) SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that—

• (a) waste incineration plants are operated to achieve a level of incineration, using waste pre-treatment techniques where necessary, so that—

• (i) the total organic carbon content of slag and bottom ashes is less than 3% of the dry weight of the material, or

• (ii) the loss on ignition of the slag and bottom ashes is less than 5% of the dry weight of the material,

• (b) waste incineration plants must be designed, equipped, built and operated in such a way that the gas resulting from the incineration of waste is raised, after the last injection of combustion air, in a controlled and homogeneous fashion and even under the most unfavourable conditions, to a temperature of at least 850°C for at least two seconds,

• (c) waste co-incineration plants must be designed, equipped, built and operated in such a way that the gas resulting from the co-incineration of waste is raised in a controlled and homogeneous fashion and even under the most unfavourable conditions, to a temperature of at least 850°C for at least two seconds,

• (d) if hazardous waste with a content of more than 1% of halogenated organic substances, expressed as chlorine, is incinerated or co-incinerated, the temperature required to comply with sub-paragraphs (b) and (c) is at least 1,100°C,

• (e) in waste incineration plants, the temperatures set out in sub-paragraphs (b) and (d) must be measured—

• (i) near the inner wall of the combustion chamber, or

• (ii) such other representative point of the combustion chamber as authorised by SEPA,

• (f) each combustion chamber of a waste incineration plant must be equipped with at least one auxiliary burner to be used in accordance with sub-paragraphs (g), (h) and (i),

• (g) the auxiliary burner must be switched on automatically when the temperature of the combustion gases after the last injection of combustion air falls below the temperatures set out in sub-paragraphs (b), (c) and (d),

• (h) the auxiliary burner must be used during plant start-up and shut-down operations to ensure that those temperatures are maintained at all times during these operations and as long as unburned waste is in the combustion chamber,

• (i) the auxiliary burner must not be fed with fuels which can cause higher emissions than those resulting from the burning of gas oil,

• (j) waste incineration plants or co-incineration plants must operate an automatic system to prevent waste feed in the following circumstances—

• (i) at start-up, until the temperature set out in sub-paragraphs (b), (c), (d) or otherwise specified by SEPA in accordance with paragraph 10 of this schedule, has been reached,

• (ii) whenever the temperature set out in sub-paragraphs (b), (c), (d) or otherwise specified by SEPA in accordance with paragraph 10 of this schedule is not maintained,

• (iii) whenever the continuous measurements show that any emission limit value is exceeded due to disturbances or failures of the waste gas cleaning devices,

• (k) any heat generated by waste incineration plants or waste co-incineration plants must be recovered as far as practicable,

• (l) infectious clinical waste must be placed straight in the combustion chamber, without first being mixed with other categories of waste and without direct handling,

• (2) In this paragraph, “gas oil” includes the fuels in sub-paragraphs (a) and (b), but not those fuels in sub-paragraphs (c) and (d)—

• (a) any petroleum-derived liquid fuel, excluding marine fuel, falling within CN codes 2710 19 25, 2710 19 29, 2710 19 47, 2710 19 48, 2710 20 17 or 2710 20 19,

• (b) any petroleum-derived liquid fuel, excluding marine fuel, of which less than 65% by volume (including losses) distils at 250°C and of which at least 85% by volume (including losses) distils at 350°C by the ASTM D86 method,

• (c) diesel fuels falling within CN code 2710 19 41 and used for self-propelling vehicles,

• (d) fuels used in non-road mobile machinery and agricultural tractors.

Variations to operating conditions

9

• (1) SEPA may specify a level of incineration different to paragraph 8(1)(a), (f), (g), (h) and (i) of this schedule provided that any change meets the requirements in sub-paragraph (3) and the other requirements of this schedule.

• (2) SEPA may specify a temperature other than those specified in paragraph 8(1)(b), (c), (d), (e), (j)(i) and (j)(ii) of this schedule provided that any change meets the requirements in sub-paragraph (3).

• (3) The requirements are—

• (a) for waste incineration plants, that the change does not cause more residues or residues with a higher content of organic polluting substances compared with the residues that would be expected if conditions were set in accordance with paragraphs 8(a) to (j) of this schedule,

• (b) for waste co-incineration plants, the emissions of total organic carbon and carbon monoxide must comply with the emission limit values set out in Part 3 of schedule 22,

• (c) emissions of total organic carbon from bark boilers within the pulp and paper industry co-incinerating waste at the place of its productions, which were in operation and had an authorisation before 28 December 2002, must comply with the emission limit values set out in Chapter 3 of Part 3.

Authorisations: delivery and reception of waste

10

SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that—

• (a) all necessary precautions are taken to prevent or limit as far as practicable in relation to the delivery and reception of waste—

• (i) the pollution of air, soil, surface water and groundwater,

• (ii) other negative effects on the environment, odours and noise,

• (iii) direct risks to human health,

• (b) the mass of each type of waste is determined, where possible in accordance with the List of Waste in Annex I to the 2000 Commission Decision prior to the acceptance of waste at the waste incineration plant or waste co-incineration plant,

• (c) prior to the acceptance of hazardous waste at a waste incineration or waste co-incineration plant, all available information contained in heads (i) to (iii) must be obtained—

• (i) all the administrative information on the generating process contained in the documents described in sub-paragraph (d)(i),

• (ii) the physical, and as far as practicable, chemical composition of the waste and all other information necessary to evaluate its suitability for the intended incineration process,

• (iii) the hazardous characteristics of the waste, the substances with which it cannot be mixed, and the precautions to be taken in handling the waste,

• (d) prior to the acceptance of hazardous waste at the waste incineration plant or waste co-incineration plant, at least the following procedures must be carried out—

• (i) the checking of the documents required by assimilated EU law which implemented the Waste Framework Directive and, where applicable, those required by Regulation (EC) No 1013/2006 of the European Parliament and of the Council of 14 June 2006 on shipments of waste and by legislation on transport of dangerous goods,

• (ii) the taking of representative samples, unless inappropriate as far as possible before unloading, to verify conformity with the information provided for in sub-paragraph (c) by carrying out controls and to enable SEPA to identify the nature of the wastes treated,

• (iii) the samples referred to in head (ii) must be kept for at least 1 month after the incineration or co-incineration of the waste concerned,

• (e) SEPA may, on application of the authorised person, grant an exemption to sub-paragraphs (b) to (d), where the waste incineration plant or waste co-incineration plant are part of an installation covered by schedule 20 and only incinerates or co-incinerates waste generated within that installation.

Authorisations: residues

11

SEPA must ensure that an authorisation for the incineration or co-incineration of waste at a waste incineration plant or co-incineration plant includes such conditions as it considers appropriate to ensure that—

• (a) residues are minimised in their amount and harmfulness,

• (b) residues are recycled, where appropriate, directly in the plant or outside,

• (c) transport and intermediate storage of dry residues in the form of dust takes place in such a way as to prevent dispersal of those residues in the environment,

• (d) appropriate tests, which must concern the total soluble fraction and heavy metals soluble fraction of any residues, are carried out to establish the physical and chemical characteristics and the polluting potential of residues prior to determining routes for the recycling or disposal of residues.

Authorisations: incineration of batteries

12

• (1) SEPA must ensure that authorisations for the incineration of waste include a condition prohibiting the incineration of waste industrial and automotive batteries.

• (2) A condition imposed under sub-paragraph (1) does not prohibit the incineration of residues of any batteries that have undergone both treatment and recycling, provided that the treatment and recycling—

• (a) used best available techniques, in terms of the protection of health and the environment,

• (b) complied, at a minimum, with all legal requirements, in particular as regards health and safety and waste management.

Authorisations: review of conditions

13

• (1) SEPA must periodically review and, where necessary, update permit conditions.

• (2) SEPA must periodically review, and where necessary, update standard conditions applicable to waste incineration and waste co-incineration activities.

Reports

14

• (1) SEPA must ensure that authorisations for waste incineration plants or waste co-incineration plants with a nominal capacity of 2 tonnes or more per hour include such conditions as it considers appropriate to ensure that the following information is kept and provided to SEPA—

• (a) information on the functioning and monitoring of the plant,

• (b) an account of the running of the incineration or co-incineration process,

• (c) the level of emissions into air and water in comparison with the emission limit values.

• (2) SEPA must maintain a list of waste incineration plants and waste co-incineration plants with a nominal capacity of less than 2 tonnes per hour.

Public consultation

15

Public consultation in accordance with paragraph 8 of schedule 1 is required in relation to an application for an authorisation for a waste incineration plant or co-incineration plant.

PART3 — Technical provisions relating to waste incineration plants and waste co-incineration plants

CHAPTER1 — Definitions

16

For the purpose of this Part the following definitions apply—

• (a) “existing waste incineration plant” means one of the following waste incineration plants—

• (i) a waste incineration plant which was in operation before 28 December 2002,

• (ii) a waste incineration plant for which a permit was granted by SEPA before 28 December 2002, provided that the waste incineration plant was put into operation no later than 28 December 2003,

• (iii) a waste incineration plant which, in the opinion of SEPA, had submitted a full application for a permit before 28 December 2002, provided that the plant was put into operation no later than 28 December 2004,

• (b) “new waste incineration plant” means any waste incineration plant not described in sub-paragraph (a).

CHAPTER2 — Equivalence factors for dibenzo-p-dioxins and dibenzofurans

17

In order to determine the total concentration of dioxins and furans, the mass concentrations of the dibenzo-p-dioxins and dibenzofurans in column 1 of Table 1 must be multiplied by the equivalence factors in column 2 of Table 1 before totalling.

	Toxic equivalence factor
2,3,7,8 — Tetrachlorodibenzodioxin (TCDD)	1
1,2,3,7,8 — Pentachlorodibenzodioxin (PeCDD)	0.5
1,2,3,4,7,8 — Hexachlorodibenzodioxin (HxCDD)	0.1
1,2,3,6,7,8 — Hexachlorodibenzodioxin (HxCDD)	0.1
1,2,3,7,8,9 — Hexachlorodibenzodioxin (HxCDD)	0.1
1,2,3,4,6,7,8 — Heptachlorodibenzodioxin (HpCDD)	0.01
Octachlorodibenzodioxin (OCDD)	0.001
2,3,7,8 — Tetrachlorodibenzofuran (TCDF)	0.1
2,3,4,7,8 — Pentachlorodibenzofuran (PeCDF)	0.5
1,2,3,7,8 — Pentachlorodibenzofuran (PeCDF)	0.05
1,2,3,4,7,8 — Hexachlorodibenzofuran (HxCDF)	0.1
1,2,3,6,7,8 — Hexachlorodibenzofuran (HxCDF)	0.1
1,2,3,7,8,9 — Hexachlorodibenzofuran (HxCDF)	0.1
2,3,4,6,7,8 — Hexachlorodibenzofuran (HxCDF)	0.1
1,2,3,4,6,7,8 — Heptachlorodibenzofuran (HpCDF)	0.01
1,2,3,4,7,8,9 — Heptachlorodibenzofuran (HpCDF)	0.01
Octachlorodibenzofuran (OCDF)	0.001

CHAPTER3 — Air emission limit values for waste incineration plants

18

• (1) All emission limit values are to be calculated—

• (a) at a temperature of 273.15K,

• (b) a pressure of 101.3kPa, and

• (c) after correcting for the water vapour content of the waste gases.

• (2) Emission limit values are standardised at 11% oxygen in waste gas unless sub-paragraph (3) applies.

• (3) This sub-paragraph applies to—

• (a) the incineration of mineral waste oil, in which case, they are standardised at 3% oxygen, and

• (b) the circumstances referred to in paragraph 25(7)(c) and (8) of this schedule,

• (4) Daily average emission limit values (mg/Nm³) for the polluting substances listed in column 1 of Table 2 are as listed in column 2.

Total dust	10
Gaseous and vaporous organic substances, expressed as total organiccarbon (TOC)	10
Hydrogen chloride (HCl)	10
Hydrogen fluoride (HF)	1
Sulphur dioxide (SO₂)	50
Nitrogen monoxide (NO) and nitrogen dioxide (NO₂), expressed as NO₂for existing waste incineration plants with a nominal capacity exceeding6 tonnes per hour or new waste incineration plants	200
Nitrogen monoxide (NO) and nitrogen dioxide (NO₂), expressed as NO₂for existing waste incineration plants with a nominal capacity of6 tonnes per hour or less	400

• (5) Half-hourly average emission limit values (mg/Nm³) for the polluting substances listed in column 1 of Table 3 are as listed in columns 2 and 3.

	(100%) A	(97%) B
Total dust	30	10
Gaseous and vaporous organic substances, expressedas total organic carbon (TOC)	20	10
Hydrogen chloride (HCl)	60	10
Hydrogen fluoride (HF)	4	2
Sulphur dioxide (SO₂)	200	50
Nitrogen monoxide (NO) and nitrogen dioxide(NO₂), expressed as NO₂ for existing waste incineration plants with a nominal capacity exceeding6 tonnes per hour or new waste incineration plants	400	200

• (6) Average emission limit values (mg/Nm³) for the heavy metals in column 1 of Table 4 are as listed in column 2 (over a sampling period of a minimum of 30 minutes and a maximum of 8 hours) and cover the gaseous and vapour forms of the relevant heavy metal emissions and their compounds.

Cadmium and its compounds, expressed as cadmium (Cd)	Total of Cd + Tl and their compounds: 0.05
Thallium and its compounds, expressed as thallium (Tl)	Total of Cd + Tl and their compounds: 0.05
Mercury and its compounds, expressed as mercury (Hg)	Total: 0.05
Antimony and its compounds, expressed as antimony (Sb)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Arsenic and its compounds, expressed as arsenic (As)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Lead and its compounds, expressed as lead (Pb)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Chromium and its compounds, expressed as chromium (Cr)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Cobalt and its compounds, expressed as cobalt (Co)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Copper and its compounds, expressed as copper (Cu)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Manganese and its compounds, expressed as manganese (Mn)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Nickel and its compounds, expressed as nickel (Ni)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5
Vanadium and its compounds, expressed as vanadium (V)	Total of Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V and their compounds: 0.5

• (7) The average emission limit value (ng/Nm³) for dioxins and furans over a sampling period of a minimum of 6 hours and a maximum of 8 hours is 0.1, which refers to the total concentration of dioxins and furans calculated in accordance with Chapter 2 of this schedule.

• (8) Emission limit values (mg/Nm³) for carbon monoxide (CO) in the waste gases are—

• (a) 50 as a daily average value,

• (b) 100 as a half-hourly average value,

• (c) 150 as a 10-minute average value,

• (9) SEPA may grant exemptions from the emission limit values in sub-paragraph (8) for waste incineration plants using fluidised bed technology, in which case, the emission limit value for carbon monoxide (CO) must be set at no more than 100 mg/Nm³ as an hourly average value.

• (10) Emission limit values applicable in the circumstances described in paragraphs 5(1)(g) and 6(k) and (l) of this schedule are—

• (a) the total dust concentration in the emissions into the air of a waste incineration plant must not exceed 150 mg/Nm³ expressed as a half-hourly average,

• (b) the air emission limit values for TOC and CO set out in sub-paragraph (5) and (8) must not be exceeded.

CHAPTER4 — Determination of air emission limit values for the co-incineration of waste

19

• (1) The formula (mixing rule) in sub-paragraph (2) is to be applied whenever a specific total emission limit value ‘C’ has not been set out in a table in this Chapter.

• (2) The emission limit value for each relevant polluting substance and CO in the waste gas resulting from the co-incineration of waste is to be calculated as follows—

$Vwaste×Cwaste±Vproc×CprocVwaste±Vproc=C$

• (3) In this Chapter—

• “Vwaste” means—waste gas volume resulting from the incineration of waste only determined from the waste with the lowest calorific value specified in the permit and standardised at the conditions given by this schedule,where the resulting heat release from the incineration of hazardous waste amounts to less than 10% of the total heat released in the waste incineration or co-incineration plant, Vwaste must be calculated from a (notional) quantity of waste that, being incinerated, would equal 10% heat release, the total heat release being fixed.

• “Cwaste” means emission limit values for waste incineration plants set out in Chapter 3,

• “Vproc” means waste gas volume resulting from the plant process including the combustion of the authorised fuels normally used in the plant (wastes excluded) determined on the basis of—oxygen contents at which the emissions must be standardised as set out in these regulations,where not provided for within these regulations, the real oxygen content in the waste gas without being thinned by addition of air unnecessary for the process,

• “Cproc” means—emission limit values as set out in this Chapter for certain industrial activities,in the absence of the values in (a), emission limit values of plants which comply with these regulations for such plants while burning the normally authorised fuels (wastes excluded),in the absence of the values in (a) or (b), the emission limit values set out in the permit,in the absence of the values in (a), (b) or (c), the real mass concentrations,

• “C” means—total emission limit values at an oxygen content as set out in this Chapter for certain industrial activities and certain polluting substances,in the absence of such values, total emission limit values replacing the emission limit values as set out in schedules 21-24,where the total oxygen content to replace the oxygen content for the standardisation is to be calculated on the basis of the content above respecting the partial volumes,all emission limit values are to be calculated at a temperature of 273.15K, a pressure of 101.3kPa and after correcting for the water vapour content of the waste gases.

Special provisions for cement kilns co-incinerating waste

20

• (1) The emission limit values in this paragraph are to be calculated—

• (a) as daily average values for total dust, HCI, HF, NOx, SO₂ and TOC for continuous measurements,

• (b) as average values over the sampling period of a minimum of 30 minutes and a maximum of 8 hours for heavy metals,

• (c) as average values over the sampling period of a minimum of 6 hours and a maximum of 8 hours for dioxins and furans.

• (2) All emission limit values in this paragraph are standardised at 10% oxygen.

• (3) Half-hourly average values are only to be needed in order to calculate the daily average values.

• (4) Total emission limit values (C) expressed in mg/Nm³ except for dioxins and furans, for the polluting substances in column 1 of Table 5 are as provided for in column 2—

Polluting substance	C
Total dust	30
HCl	10
HF	1
NOx	500
Cd + Tl	0.05
Hg	0.05
Sb + As + Pb + Cr + Co + Cu + Mn + Ni + V	0.5
Dioxins and furans (ng/Nm³)	0.1

• (5) The total emission limit value (C) for SO₂ expressed in mg/Nm³ is 50.

• (6) The total emission limit value (C) for TOC, expressed in mg/Nm³ is 10.

• (7) The total emission limit value (C) for CO may be set by SEPA.

• (8) SEPA may set a different total emission limit value (C) for SO₂ and TOC where the SO₂ or TOC does not result from the co-incineration of waste.

Special provisions for combustion plants co-incinerating waste

21

• (1) Cproc 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) Cproc 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—

Cprocfor solid fuels with the exception of biomass (O2 content: 6%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	400300 for peat	200	200
NOx	-	300400 for pulverised lignite	200	200
Dust	50	30	25For peat: 20	20
Cprocfor biomass (O₂content: 6%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	200	200	200
Nox	-	300	250	200
Dust	50	30	20	20
Cprocfor liquid fuels (O₂content: 3%)
Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
SO₂	-	350	250	200
NOx	-	400	200	150
Dust	50	30	25	20

• (5) Cproc 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—

Polluting substance	<50 MWth	50-100 MWth	100 to 300 MWth	>300 MWth
Cproc for solid fuels with the exception of biomass (O₂ content: 6%)
SO₂	-	400300 for peat	200300 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
NOx	_	300For peat: 250	200	150For pulverised lignite combustion: 200
Dust	50	20	20	10For peat: 20
Cproc for biomass (O₂ content: 6%)
So₂	-	200	200	150
NOx	-	250	200	150
Dust	50	20	20	20
Cproc for liquid fuels (O₂ content: 3%)
So₂	-	350	200	150
NOx	-	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—

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.

Special provisions for waste co-incineration plants in industrial sectors not covered under paragraphs 20 and 21 of this Part

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• (1) Total emission limit value (C) (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 is 0.1.

• (2) Total emission limit values (C) for heavy metals expressed as average values over the sampling period of a minimum of 30 minutes and a maximum of 8 hours are—

• (a) for Cd and TI, 0.05,

• (b) for Hg, 0.05.

CHAPTER5 — Emission limit values for discharges of wastewater from the cleaning of waste gases

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Emission limit values for discharges of wastewater from the cleaning of waste gases are as provided for in Table 9—

Polluting Substances	Emission limit values for unfiltered samples (mg/l except for dioxins and furans)	Emission limit values for unfiltered samples (mg/l except for dioxins and furans)
1. Total suspended solids as defined inAnnex I of Directive 91/271/EEC concerning urban wastewater treatment	95%	100%
1. Total suspended solids as defined inAnnex I of Directive 91/271/EEC concerning urban wastewater treatment	30	45
2. Mercury and its compounds, expressedas mercury (Hg)	0.03	0.03
3. Cadmium and its compounds,expressed as cadmium (Cd)	0.05	0.05
4. Thallium and its compounds,expressed as thallium (Tl)	0.05	0.05
5. Arsenic and its compounds, expressedas arsenic (As)	0.15	0.15
6. Lead and its compounds, expressed aslead (Pb)	0.2	0.2
7. Chromium and its compounds,expressed as chromium (Cr)	0.5	0.5
8. Copper and its compounds, expressedas copper (Cu)	0.5	0.5
9. Nickel and its compounds, expressedas nickel (Ni)	0.5	0.5
10. Zinc and its compounds, expressed aszinc (Zn)	1.5	1.5
11. Dioxins and furans	0.3 ng/l	0.3 ng/l

CHAPTER6 — Monitoring of emissions

Measurement techniques

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