Schedule 18 NEW SCHEDULE 27 TO BE INSERTED INTO THE REGULATIONS

“SCHEDULE 27

OPERATING A MEDIUM COMBUSTION PLANT

Regulation 6(1)

PART 1

Scope and Interpretation

Scope

1.

This Schedule applies to operating a medium combustion plant.

Interpretation: operating a medium combustion plant

2.

(1)

In this schedule, “operating a medium combustion plant” means operating a combustion plant with a rated thermal input equal to or greater than 1 megawatt and less than 50 megawatts but does not include the activities in sub-paragraph (2).

(2)

The excluded activities are the operation of—

(a)

a large combustion plant,

(b)

a waste incineration or waste co-incineration plant,

(c)

combustion plants covered by EU Regulation 2016/1628 on requirements relating to gaseous and particulate pollutant emission limits and type-approval for internal combustion engines for non-road mobile machinery^f1,

(d)

on-farm combustion plants with a total rated thermal input less than or equal to 5 megawatts, that exclusively use unprocessed poultry manure, as referred to in Article 9(a) of EU Regulation No. 1069/2009 of the European Parliament and Council laying down health rules as regards animal by-products and derived products not intended for human consumption and repealing Regulation (EC) No 1774/2002, as a fuel^f2,

(e)

combustion plants in which the gaseous products of combustion are used for the direct heating, drying or any other treatment of objects or materials,

(f)

combustion plants in which the gaseous products of combustion are used for direct gas-fired heating used to heat indoor spaces for the purpose of improving workplace conditions,

(g)

post-combustion plants designed to purify the waste gases from industrial processes by combustion and which are not operated as independent combustion plants,

(h)

any technical apparatus used in the propulsion of a vehicle, ship or aircraft,

(i)

gas turbines and gas and diesel engines, when used on offshore platforms,

(j)

facilities for the regeneration of catalytic cracking catalysts,

(k)

facilities for the conversion of hydrogen sulphide into sulphur,

(l)

reactors used in the chemical industry,

(m)

coke battery furnaces,

(n)

cowpers,

(o)

crematoria,

(p)

combustion plants firing refinery fuels alone or with other fuels for the production of energy within mineral oil and gas refineries,

(q)

recovery boilers within installations for the production of pulp.

(3)

Operating a medium combustion plant does not include research activities, development activities or testing activities relating to medium combustion plants.

Interpretation: general

3.

In this schedule—

• “biomass” has the meaning given in paragraph 3(1) of schedule 19 of these Regulations,

• “diesel engine” has the meaning given in paragraph 2 of schedule 21 of these Regulations,

• “dual fuel engine” means an internal combustion engine that uses compression ignition and operates according to the Diesel cycle when burning liquid fuels, and according to the Otto cycle when burning gaseous fuels,

• “dust” means particles, of any shape, structure or density, dispersed in the gas phase at the sampling point conditions, which may be collected by filtration under specified conditions after representative sampling of the gas to be analysed, and that remain upstream of the filter and on the filter after drying under specified conditions,

• “emission” means the discharge of substances from a combustion plant into the air,

• “engine” means a gas engine, diesel engine or dual fuel engine,

• “existing medium combustion plant” means a medium combustion plant put into operation on or before 20 December 2018,

• “gas engine” means an internal combustion engine that operates according to the Otto cycle and uses spark ignition to burn fuel,

• “gas oil” means—

  1. (a)

     any petroleum-derived liquid fuel falling within CN codes 2710 19 25, 2710 19 29, 2710 19 47, 2710 19 48, 2710 20 17 or 2710 20 19, or

  2. (b)

     any petroleum-derived liquid 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,

• “gas turbine” means any rotating machine which converts thermal energy into mechanical work, consisting mainly of a compressor, a thermal device in which fuel is oxidised in order to heat the working fluid, and a turbine,

• “heavy fuel oil” means—

  1. (a)

     any petroleum-derived liquid fuel falling within CN codes 2710 19 51 to 2710 19 68, 2710 20 31, 2710 20 35, or 2710 20 39,

  2. (b)

     any petroleum-derived liquid fuel, other than gas oil, which, by reason of its distillation limits, falls within the category of heavy oils intended for use as fuel and of which less than 65% by volume (including losses) distils at 250°C by the ASTM D86 method, or

  3. (c)

     any petroleum product for which distillation cannot be determined by the ASTM D86 method,

• “micro-isolated system” (MIS) means any electricity system with consumption less than 500 GWh in the year 1996 where there is no connection with other systems,

• “natural gas” means naturally occurring methane with no more than 20% (by volume) of inerts and other constituents,

• “new medium combustion plant” means a medium combustion plant other than an existing medium combustion plant,

• “nitrogen oxides” (NO_x) means nitric oxide and nitrogen dioxide, expressed as nitrogen dioxide (NO₂),

• “operating hours” has the meaning given in paragraph 2 of schedule 21 of these Regulations,

• “refinery fuel” means solid, liquid or gaseous combustible material from the distillation and conversion steps of the refining of crude oil, including refinery fuel gas, syngas, refinery oils and pet coke,

• “small isolated system (SIS)” means any electricity system with consumption of less than 3000 GWh in the year 1996, where less than 5% of annual consumption is obtained through interconnection with other systems,

• “stack” has the meaning given in paragraph 2 of schedule 21 of these Regulations,

• “zone” means part of the territory of Scotland as determined by the Scottish Ministers under regulation 4 of the Air Quality Standards (Scotland) Regulations 2010^f3.

Aggregation

4.

A combination formed by two or more new medium combustion plants is considered to be a single medium combustion plant for the purposes of this schedule and their rated thermal input are added together for the purpose of calculating the total rated thermal input of the plant, where—

(a)

the waste gases of the plants are discharged through a common stack, or

(b)

in the opinion of SEPA, the waste gases of the plant could be discharged through a common stack, taking into account technical and economic factors.

PART 2

Amendments to common framework provisions

Authorisations

5.

(1)

Operating a medium combustion plant may be authorised by permit, registration or notification.

(2)

An authorisation for operating a medium combustion plant must give effect to the provisions of this schedule.

Applications for medium combustion activity authorisations

6.

An application for an authorisation and a notification for operating a medium combustion plant must include—

(a)

the name of the applicant and the address of the applicant’s registered or principal office,

(b)

the address of the plant (or site upon which the plant is located),

(c)

the rated thermal input (in megawatts) of the plant,

(d)

the type of medium combustion plant (diesel engine, gas turbine, dual fuel engine, other engine or other medium combustion plant),

(e)

the type and share of fuels used (according to the categories in Part 3 of this schedule),

(f)

the date of the start of the operation of the medium combustion plant or, where the exact date of the start of the operation is unknown, proof of the fact that the operation started before 20 December 2018,

(g)

the sector of activity of the medium combustion plant or the facility in which it is applied (SIC Code),

(h)

the expected number of annual operating hours of the medium combustion plant and average load in use,

(i)

if required for the purposes of an exemption from compliance with emission limit values, a declaration signed by the Authorised person that the plant will not be operated for more than 500 hours or 1000 hours per year (calculated as a rolling average over a period of 5 years) or 500 hours per year (calculated as a rolling average over a period of 3 years), as appropriate.

Emission limit values: calculation

7.

All emission limit values set out in this schedule are to be calculated—

(a)

at a temperature of 273.15K,

(b)

at 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 medium combustion plants using solid fuels,

(ii)

3% for medium combustion plants, other than engines and gas turbines, using liquid and gaseous fuels,

(iii)

15% for engines and gas turbines.

Emission limit values: general

8.

(1)

The emissions into air of SO₂, NO_x and dust from an existing medium combustion plant with a rated thermal input greater than 5 megawatts must not exceed the emission limit values set out in—

(a)

Table 2, if the plant is not an engine or gas turbine,

(b)

Table 3 if the plant is an engine or gas turbine,

unless an exemption in paragraph 9 applies.

(2)

The emissions into air of SO₂, NO_x and dust from an existing medium combustion plant with a rated thermal input of less than or equal to 5 megawatts must not exceed the emission limit values set out in—

(a)

Table 1, if the plant is not an engine or gas turbine,

(b)

Table 3, if the plant is an engine or gas turbine,

unless an exemption in paragraphs 9 or 10 of this schedule applies.

(3)

The emissions into air of SO₂, NO_x and dust from a new medium combustion plant must not exceed the emission limit values set out in—

(a)

Table 4, if the plant is not an engine or gas turbine,

(b)

Table 5, if the plant is an engine or gas turbine.

(4)

In zones or parts of zones not compliant with the limit values set out in schedule 2 of the Air Quality Standards (Scotland) Regulations 2010^f4, SEPA must consider setting stricter permit conditions for individual medium combustion plants than those required by this paragraph where, in the opinion of SEPA, applying such emission limit values would effectively contribute to a noticeable improvement of air quality.

(5)

In zones or parts of zones not compliant with the limit values set out in schedule 2 of the Air Quality Standards (Scotland) Regulations 2010, the Scottish Ministers may direct SEPA to include stricter emission limit values for individual medium combustion plants than those required by this paragraph, where, in the opinion of the Scottish Ministers, applying such emission limit values would effectively contribute to a noticeable improvement of air quality.

Emission limit values: existing medium combustion plant exemptions

9.

(1)

An existing medium combustion plant is exempt from the requirements in paragraph 8(1) or (2) of this schedule if—

(a)

the plant does not operate more than 500 hours per year (calculated as a rolling average over a period of 5 years), or

(b)

the plant does not operate more than 1000 hours per year (calculated as a rolling average over a period of 5 years) and the plant is operated in case of emergency or extraordinary circumstances for—

(i)

backup power production on an island where the main power supply to that island is from the Scottish mainland, in the event of an interruption of the main power supply to an island, or

(ii)

heat production in cases of exceptionally cold weather events.

(2)

An authorisation for medium combustion plant which—

(i)

is exempt by sub-paragraph (1) from the requirements in paragraph 8(1) or (2) of this schedule, and

(ii)

is firing solid fuels,

must contain an emission limit value for dust of 200 mg/Nm³.

(3)

An existing medium combustion plant with a rated thermal input greater than 5 megawatts is exempt from the requirement in paragraph 8(1) of this schedule until 1 January 2030 where at least 50% of the useful heat production of the plant (calculated as a rolling average over of a period of 5 years) is delivered in the form of steam or hot water to a public network for district heating.

(4)

An authorisation for a medium combustion plant which is exempt by sub-paragraph (3) from the requirement in paragraph 8(1) must contain, where applicable—

(a)

emission limits values which do not exceed—

(i)

1100 mg/Nm³ for SO₂,

(ii)

150 mg/Nm³ for dust,

(b)

conditions that are necessary to ensure that—

(i)

no significant pollution is caused,

(ii)

a high level of protection for the environment as a whole is achieved.

(5)

An existing medium combustion plant with a rated thermal input greater than 5 megawatts is exempt until 1 January 2030 from the requirement in paragraph 8(1) of this schedule to comply with the emission limit values for NO_x in Table 3 where the plant is used to drive gas compressor stations required to ensure the safety and security of a national gas transmission system.

(6)

An existing medium combustion plant which is part of a small isolated system, or a micro isolated system is exempt from the requirements in paragraphs 8(1) and (2) until 1 January 2030.

Emission limit values: exemptions

10.

(1)

A medium combustion plant is exempt until 1 January 2030 from the requirements in paragraph 8(1) or (2) to comply with an emission limit value for dust in Tables 1, 2, or 3 where—–

(a)

the plant fires solid biomass as its main fuel,

(b)

the plant is situated in a zone which conforms with the limit values set out in retained EU law implementing Directive 2008/50/EC of the European Parliament and of the Council on ambient air quality and cleaner air for Europe^f5.

(2)

An authorisation for a medium combustion plant which is exempt by sub-paragraph (1) from the requirements in paragraph 8(1) or (2) must contain—

(a)

emission limit values which do not exceed 150 mg/Nm³ for dust,

(b)

conditions necessary to ensure that—

(i)

no significant environmental harm is caused,

(ii)

a high level of protection for the environment as a whole is achieved.

(3)

A new medium combustion plant is exempt from the requirements in paragraph 8(3) where the plant does not operate more than 500 hours per year (calculated as a rolling average over a period of 3 years).

(4)

An authorisation for a plant which—

(a)

is exempt by sub-paragraph (3) from the requirements in paragraph 8(3) of this schedule, and

(b)

is firing solid fuels

must contain an emission limit value for dust of 100 mg/Nm³.

Emission limit values: temporary exemptions

11.

(1)

SEPA may, on application of the authorised person, grant an exemption for a maximum period of 6 months from the requirements in paragraph 8 of this schedule to comply with an emission limit value for SO₂ where the medium combustion plant—

(a)

normally uses low-sulphur fuel, and

(b)

the authorised person is unable to comply with an emission limit value for SO₂ due to an interruption in the supply of low-sulphur fuel resulting from a serious shortage.

(2)

SEPA may, on application of the authorised person, grant an exemption for a maximum period of 10 days from the requirements in paragraph 8 of this schedule where the plant—

(a)

uses only gaseous fuels,

(b)

has to resort exceptionally to the use of non-gaseous fuel due to a sudden interruption in the supply of gas, and

(c)

requires to be fitted with secondary abatement equipment due to the interruption.

(3)

An application for an exemption—

(a)

under sub-paragraph (1), must be made to SEPA in writing,

(b)

under sub-paragraph (2)—

(i)

must be made immediately and in advance of the need to use other fuels,

(ii)

may be made in writing, or by other means,

(c)

will be treated as an accelerated application for a variation under regulation 63 of these Regulations,

(d)

will be determined by SEPA within the period as considered appropriate by SEPA in the circumstances.

(4)

SEPA will notify the authorised person in writing of an exemption granted under sub-paragraph (3) where practicable to do so.

(5)

The period in sub-paragraph (2) may be extended where SEPA considers that the authorised person has demonstrated that a longer period is justified.

(6)

SEPA must immediately inform the Scottish Ministers of any exemption granted under this paragraph.

Emission limit values: multiple fuels

12.

Where a medium combustion plant simultaneously uses two or more fuels, the emission limit value for each pollutant is calculated by—

(a)

taking the emission limit value in Table 1, 2, 3, 4 or 5 for each fuel,

(b)

determining the fuel-weighted emission limit value, which is obtained by multiplying the individual emission limit value in sub-paragraph (a) by the thermal input delivered by each fuel, and dividing the product of multiplication by the sum of the thermal inputs delivered by all fuels, and

(c)

aggregating the fuel-weighted emission limit values.

Emissions monitoring

13.

(1)

SEPA must ensure that an authorisation for operating a medium combustion plant includes such conditions as it considers appropriate in an authorisation for a medium combustion activity to ensure that—

(a)

where the plant is using more than one fuel type, emissions are monitored—

(i)

while the fuel or fuel mix likely to result in the highest level of emissions is being fired, and

(ii)

during a period, representative of normal operating conditions,

(b)

all monitoring results are recorded and processed so as to enable verification of compliance with the applicable emission limit values,

(c)

a record or information is kept proving the effective continuous operation of any secondary abatement equipment in use at the plant,

(d)

the following are kept—

(i)

the authorisation and, where relevant, variations and related information,

(ii)

the monitoring results and information referred to in sub-paragraphs (b) and (c),

(iii)

a record of the plant’s operating hours if applicable for the purposes of paragraph 9(1) or 10(3),

(iv)

a record of the type and quantities of fuel used in the plant,

(v)

a record of any breakdown or malfunction of secondary abatement equipment,

(vi)

a record of a breach of an emission limit value, and the measures taken by the authorised person to restore compliance,

(e)

the information referred to in head (d)(ii) to (vi) is kept for a period of at least 6 years.

(2)

Emissions are to be measured—

(a)

for medium combustion plants with a rated thermal input equal to or greater than 1 MW and less than or equal to 20 MW, at least every three years,

(b)

for all other medium combustion plants, annually,

unless sub-paragraph (3) applies.

(3)

This paragraph applies where a medium combustion plant is—

(a)

exempt from the requirements of paragraph 8(1) or (2) by paragraph 9(1) of this schedule, or

(b)

exempt from the requirements of paragraph 8(3) by paragraph 10(3) of this schedule.

(4)

Where sub-paragraph (3) applies, emissions must be measured at the most frequent of—

(a)

for a medium combustion plant with a rated thermal input equal to or greater than 1 MW and less than or equal to 20 MW, after the elapse of three times the maximum permitted average annual operating hours,

(b)

for medium combustion plants with a rated thermal input greater than 20 MW, after the elapse of a period equal to the maximum average annual operating hours

and in either case, measurements must be taken at least every five years.

(5)

The following emissions are to be measured—

(a)

pollutants for which an emission limit value is included in this schedule relevant to the plant concerned, and

(b)

carbon monoxide.

(6)

The first measurement of emissions is taken within 4 months of either—

(a)

the grant of the authorisation,

(b)

the date of the start of operation of the plant.

(7)

Where verified and approved of by SEPA, as an alternative to the requirements of sub-paragraphs (2) and (4), other procedures may be used to determine SO₂ emissions from the plant.

(8)

Where emissions are required by SEPA to be measured continuously—

(a)

the measuring systems must be subject to checking by means of parallel measurements with the reference methods at least annually, and

(b)

results of the check are to be provided to SEPA.

(9)

Measurements must be taken when—

(a)

the plant is operating under stable conditions at a representative even load, and

(b)

the plant is not starting-up or shutting down.

(10)

Sampling and analysis of polluting substances and measurements of process parameters are to be based on methods enabling reliable, representative and comparable results.

(11)

Periods of start-up and shut-down are as short as possible.

Compliance

14.

SEPA must ensure that an authorisation for operating a medium combustion plant includes such conditions as it considers appropriate to ensure that in the event of a breach of conditions, the authorised person must—

(a)

immediately inform SEPA,

(b)

immediately take necessary measures to ensure that compliance is restored as soon as possible,

(c)

immediately cease operation of the medium combustion plant in the event that the non-compliance causes a significant degradation of local air quality.

Compliance and measurement

15.

(1)

SEPA must periodically check compliance with authorisation conditions and, in the case of notifications, the applicable general binding rules, including emission limit values.

(2)

In the case of periodic measurements, an emission limit value is to be treated as being complied with if each of the series of measurements (or other procedures) do not exceed the emission limit value.

(3)

In the case of continuous measurements, an emission limit value is to be treated as being 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 emission limit value,

(b)

no validated daily average value exceeds 110% of the emission limit value,

(c)

in the case of plant composed only of boilers using coal, no validated daily average value exceeds 150% of the emission limit value,

(d)

95% of all the validated hourly average values over the year do not exceed 200% of the emission limit value.

(4)

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)

10% for emissions of carbon monoxide,

(b)

20% for emissions of sulphur dioxide,

(c)

20% for emissions of nitrogen oxides,

(d)

30% for dust.

(5)

The validated hourly and daily average values are determined from the measured valid hourly average values after having subtracted the value of the confidence interval specified in sub-paragraph (4).

(6)

A day is invalidated if more than three hourly average values are invalid due to malfunction or maintenance of the automated measuring system.

(7)

For the purpose of calculating average emission limit values the following periods are to be disregarded—

(a)

periods of start-up and shut-down, and

(b)

the periods referred to in paragraph 11 of this schedule.

Public requests for monitoring data

16.

SEPA must exercise its functions under regulation 37 where a member of the public requests access to the matters listed in paragraph 13(1)(d)(ii) to (vi) unless that information is otherwise readily available to SEPA.

PART 3

Tables

Table 1

Emission limit values (mg/Nm³) for existing medium combustion plants with a rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW, other than engines and gas turbines

(1) The value does not apply in the case of plants firing exclusively woody solid biomass.
(2) 300 mg/Nm3 in the case of plants firing straw.
(3) 400 mg/Nm3 in the case of low calorific gases from coke ovens in the iron and steel industry.
Pollutant	Solid biomass	Other solid fuels	Gas oil	Liquid fuels other than gas oil	Natural gas	Gaseous fuels other than natural gas
SO2	200f6f7	1100	-	350	-	200f8
NOx	650	650	200	650	250	250
Dust	50	50	-	50	-	-

Table 2

Emission limit values (mg/Nm³) for existing medium combustion plants with a rated thermal input greater than 5 MW, other than engines and gas turbines

(1) The value does not apply in the case of plants firing exclusively woody solid biomass.
(2) 300 mg/Nm3 in the case of plants firing straw.
(3) 1,100 mg/Nm3 in the case of plants with a rated thermal input greater than 5 MW and less than or equal to 20 MW.
(4) Until 1 January 2030, 850 mg/Nm3 in the case of plants with a rated thermal input greater than 5 MW and less than or equal to 20 MW firing heavy fuel oil.
(5) 400 mg/Nm3 in the case of low calorific gases from coke ovens, and 200 mg/Nm3 in the case of low calorific gases from blast furnaces, in the iron and steel industry.
(6) 170 mg/Nm3 in the case of biogas.
(7) 50 mg/Nm3 in the case of plants with a rated thermal input greater than 5 MW and less than or equal to 20 MW.
Pollutant	Solid biomass	Other solid fuels	Gas oil	Liquid fuels other than gas oil	Natural gas	Gaseous fuels other than natural gas
SO2	200f9f10	400f11	-	350f12	-	35f13f14
NOx	650	650	200	650	200	250
Dust	30f15	30	-	30	-	-

Table 3

Emission limit values (mg/Nm³) for existing engines and gas turbines

(1) 60 mg/Nm3 in the case of biogas.
(2) 130 mg/Nm3 in the case of low calorific gases from coke ovens, and 65 mg/Nm3 in the case of low calorific gases from blast furnaces, in the iron and steel industry.
(3) 1,850 mg/Nm3 in the following cases—
(i) for diesel engines the construction of which commenced before 18 May 2006,
(ii) for dual fuel engines in liquid mode.
(4) 250 mg/Nm3 in the case of engines with a rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW.
(5) 250 mg/Nm3 in the case of engines with a rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW,
225 mg/Nm 3 in the case of engines with a rated thermal input greater than 5 MW and less than or equal to 20 MW.
(6) 380 mg/Nm3 for dual fuel engines in gas mode.
(7) Emission limit values are only applicable above 70 % load.
(8) 20 mg/Nm3 in the case of plants with a rated thermal input equal to or greater than 1 MW and less than or equal to 20 MW.
Pollutant	Type of medium combustion plant	Gas oil	Liquid fuels other than gas oil	Natural gas	Gaseous fuels other than natural gas
SO2	Engines and gas turbines	-	120	-	15f16f17
NOx	Engines	190f18f19	190f20	190f21	190
NOx	Gas Turbinesf22	200	200	150	200
Dust	Engines and gas turbines	-	10f23	-	-

Table 4

Emission limit values (mg/Nm³) for new combustion plants other than engines and gas turbines

(1) The value does not apply in the case of plants firing exclusively woody solid biomass.
(2) Until 1 January 2025, 1700 mg/Nm3 in the case of plants which are part of SIS or MIS.
(3) 400 mg/Nm3 in the case of low calorific gases from coke ovens, and 200 mg/Nm3 in the case of low calorific gases from blast furnaces, in the iron and steel industry.
(4) 100 mg/Nm3 in the case of biogas.
(5) 500 mg/Nm3 in the case of plants with a total rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW.
(6) Until 1 January 2025, 450 mg/Nm3 when firing heavy fuel oil containing between 0.2 % and 0.3 % N and 360 mg/Nm3 when firing heavy fuel oil containing less than 0.2 % N in the case of plants which are part of SIS or MIS.
(7) 50 mg/Nm3 in the case of plants with a total rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW; 30 mg/Nm3 in the case of plants with a total rated thermal input greater than 5 MW and less than or equal to 20 MW.
(8) 50 mg/Nm3 in the case of plants with a total rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW.
Pollutant	Solid biomass	Other solid fuels	Gas oil	Liquid fuels other than gas oil	Natural gas	Gaseous fuels other than natural gas
SO2	200f24	400	-	350f25	-	35f26f27
NOx	300f28	300	200	300f29	100	200
Dust	20f30	20	-	20f31	-	-

Table 5

Emission limit values (mg/Nm³) for new engines and gas turbines

(1) Until 1 January 2025, 590 mg/Nm3 for diesel engines which are part of SIS or MIS.
(2) 40 mg/Nm3 in the case of biogas.
(3) Engines running between 500 and 1,500 hours per year may be exempted from compliance with those emission limit values if they are applying primary measures to limit NOx emissions and meet the emission limit values set out in footnote (4).
(4) Until 1 January 2025 in SIS and MIS, 1,850 mg/Nm3 for dual fuel engines in liquid mode and 380 mg/Nm3 in gas mode; 1,300 mg/Nm3 for diesel engines with ≤ 1200 rpm with a total rated thermal input less than or equal to 20 MW and 1,850 mg/Nm3 for diesel engines with a total rated thermal input greater than 20 MW; 750 mg/Nm3 for diesel engines with > 1,200 rpm.
(5) 225 mg/Nm3 for dual fuel engines in liquid mode.
(6) 225 mg/Nm3 for diesel engines with a total rated thermal input less than or equal to 20 MW with ≤ 1,200 rpm.
(7) 190 mg/Nm3 for dual fuel engines in gas mode.
(8) These emission limit values are only applicable above 70 % load.
(9) Until 1 January 2025, 550 mg/Nm3 for plants which are part of SIS or MIS.
(10) Until 1 January 2025, 75 mg/Nm3 for diesel engines which are part of SIS or MIS.
(11) 20 mg/Nm3 in the case of plants with a total rated thermal input equal to or greater than 1 MW and less than or equal to 5 MW.
Pollutant	Type of medium combustion plant	Gas oil	Liquid fuels other than gas oil	Natural gas	Gaseous fuels other than natural gas
SO2	Engines and gas turbines	-	120f32	-	15f33
NOx	Enginesf34f35	190f36	190f37	95f38	190
NOx	Gas turbinesf39	75	75f40	50	75
Dust	Engines and gas turbines	-	10f41f42	-	-

”