National Environment (Air Quality Standards) Regulations

Stationary Emission Sources

Stationary Emission Sources

Emission Control Technologies

Emissions from Open Burning, Odour and Transboundary Sources

These Regulations may be cited as the National Environment (Air Quality Standards) Regulations, 2024.

In these Regulations, unless the context otherwise requires- "Act" means the National Environment Act, 2019; "air pollutants" means airborne substances; either solids, liquids or gases that occur in concentrations that threaten or harm human health and the environment; "air pollution" means a change in the air quality resulting from human activity, through direct or indirect input of pollutants that may be harmful to human health and the environment, or cause damage to property or disturb or affect amenities of life and any other legitimate manner of environment use; "air quality" means the state of air, including the concentration of pollutants in the atmosphere at the point of measurement; "ambient air" means the outdoor air to which human beings, plants, animals or material are exposed, typically measured near ground level, away from direct sources of pollution but does not include the atmosphere within a structure or within any underground space; "Authority" means the National Environment Management Authority established by section 8 of the Act; "currency point" has the value assigned to it in Schedule 1 to these Regulations; "emergency situation" means an environmental emergency resulting from sudden on-set disasters or incidents arising from natural, technological or human induced factors or a combination of these factors that cause or are likely to cause significant environmental damage or loss of human life and property;

Stationary Emission Sources

Mobile Emission Sources

Other Sources of Emissions

Emission Control Technologies

Emissions from Open Burning, Odour and Transboundary Sources

A person shall not carry out open burning of any combustible material that emits air pollutants that affect ambient air quality contrary to the standards set out in Schedule 2 to these Regulations

An operator shall (a) use best practicable means and technologies to ensure that the work environment is free of pollutants and complies with the limits set out in Schedule 5 to these Regulations;

The owner, operator or occupier of premises shall (a) ensure that ventilation and interior finishing of buildings is undertaken in a manner and with materials that enhance and protect indoor air quality;

agency (1) The Authority shall, in consultation with the relevant lead agency, develop a national air quality monitoring programme in accordance with this regulation.

The air quality management plan developed under regulation 23 shall contain (a) a coordination mechanism for air quality management in the affected area; (b) measures to identify the negative impact of poor air quality on human health and the environment;

plan A lead agency shall submit an annual air quality management report to the Authority including information on-

The Authority shall, in collaboration with the relevant lead agency and other stakeholders (a) undertake air quality awareness programmes for the public; (b) provide and disseminate information to the public in respect the implementation of air quality management plans and short term action plans; and (c) undertake and support research in innovations, new technologies and emerging issues on air quality.

An operator shall report to the Authority and the relevant lead agency any event resulting in excess emission (a) by giving notice of the event within twenty-four hours after the occurrence of the event; and

A person who pollutes the air contrary to the Act, these Regulations and any other written law is strictly liable for any damage caused to human health or to the environment, regardless of fault

The Authority may, in granting a licence under regulation 46, impose conditions, including requirements relating to (a) compliance with the Act, these Regulations, the National Environment (Audit) Regulations, 2020, any other written law and environmental standards; (b) performance standards to which the facility is subject, including the application of best available techniques, best

available technologies and best environmental practices which- (i) require adoption of the most effective, advanced and practically suitable methods of operation; and (ii) balance the cost to the operator with benefits to human health and the environment; (c) permitted emission limits applicable to the facility; (d) alert systems that warn where the permitted emission limits are being exceeded; (e) pollution abatement and risk reduction; (f) air quality compliance monitoring programmes and air quality management plans;

control licence shall be valid for a period not exceeding one year

The Authority, an occupational hygienist, environmental inspector or an authorised officer may conduct regular inspections and monitoring of a facility or other area to (a) enforce compliance by the operator of the facility or any other person with the Act, these Regulations, the Occupational Safety and Health Act, 2006, other relevant law and environmental standards; (b) ascertain that appropriate measures are in place for the avoidance or minimisation of air pollution; (c) ensure that the information contained in reports and other documents submitted or availed to the Authority or relevant lead agency by the operator reflects the performance of the facility; (d) assess the quality of air, including by inspecting air pollution control log-frames and technologies at the facility; (e) review compliance with licences and facility air quality management plans; and (f) perform such other tasks as may be necessary to bring the facility into compliance with these Regulations.

SCHEDULE 1 Regulation 3

CURRENCY POINT

A currency point is equivalent to twenty thousand shillings

SCHEDULE 2

Regulations 5(1), 7(2), 9(3), 14, 15(3), 25(d), 28(1)

AMBIENT AIR QUALITY STANDARDS AND TOLERANCE LIMITS.

Table 1: Criteria for Ambient Air Quality Standards and Tolerance Limits Pollutant Time-weighted Standard for No. Average Ambient Air

24-hour 7 mg/m3 Carbon monoxide (CO) 8-hour 10 mg/m3 1-hour 35 mg/m3 Hydrogen Sulphide (H2S) 1-hour 42 µg/m3 1-hour 235 µg/m3 Ozone (O3) 8-hour 120 µg/m3 Annual average 25 µg/m3 PM2.5 24-hour 35 µg/m3 Annual average 40 µg/m3 PM10 24-hour 60 µg/m3 1-hour 50 µg/m3 Sulphur dioxide (SO2) 24-hour 20 µg/m3 Annual average 30 µg/m3 Nitrogen dioxide (NO2) 24-hour 50 µg/m3

Total Volatile Organic 600 µg/m3 24-hour Compounds (VOCs)

Table 2: Hazardous Ambient Air Pollutants Standard for Time-weighted No. Pollutant Emissions Average sources Inorganic Pollutants Ammonia (NH3) 24 hours 200 µg/m3

Arsenic (As) Annual 6 ng/m3 No safe levels of Asbestos No safe levels exposure Carbon disulfide (CS2) 30 minutes 20 µg/m3 Cadmium (Cd) Annual 5 ng/m3 Lead (Pb) 3 months 0.15 µg/m3 Manganese (Mn) annual 0.15 µg/m3 Mercury (Hg) annual 1 µg/m3 Nickel (Ni) Annual 20 ng/m3 Vanadium (V) 24 hours 1 µg/m3 Organic Pollutants Benzene Annual 5 μg/m3 Benzo(a)pyrene 24 hrs 1 ng/m3 Butadiene 24 hours 50 μg/m3 1,2-Dichloroethane 24 hours 0.7 mg/m3 24 hours 3 mg/m3 Dichloromethane 1 week 0.45 mg/m3 Formaldehyde 30 minutes 0.1 mg/m3 Polycyclic aromatic hydrocarbons (Total Annual 5 ng/m3 PAHs)

24 hours 125 µg/ m3 Styrene annual 50 µg/ m3 annual 0.25 mg/ m3 Tetrachloroethylene 30 minutes 8 mg/ m3 1 week 0.26 mg/ m3 Toluene 30 minutes 1mg/ m3 And any other parameter as may be prescribed by the Authority from time to time

Legend a) μg- microgram. b) m3 - cubic meter. c) PM2.5 - particulate matter with an aerodynamic diameter of less than or equal to a nominal 2.5 micrometers, as determined by the appropriate validated method of analysis. d) PM10 - particulate matter with an aerodynamic diameter of less than or equal to a nominal 10 micrometers, as determined by the appropriate validated method of analysis. e) n-nonogram.

SCHEDULE 3 Regulations 6(1), 11(2)(a), 15(3), 25(d) and 34(1))

MAXIMUM PERMISSIBLE EMISSION LIMITS FOR STACKS, CHIMNEYS, VENTS AND OTHER STATIONARY EMISSION SOURCES

PARAMETERS AND MAXIMUM VALUES PARAMETERS (All units are in mg/Nm3, unless otherwise specified) PM* SOX or OTHER/ SOURCE NOX or NO2 HF SO2 COMMENTS Aluminium production · Total F: 2 316 and manufacturing (all New 30 50 - 0.5 installations) · VOCs: 20 Existing 80 250 - 1 · Hydrocarbons: 20

· As: 0.1

· Cd: 0.05

· Cu: 0.5

· Hg: 0.05

· Pb: 0.5

· Zn: 1

Incinerators New 10 50 200 1 · HCl 10

· Dioxins and Furans: 0.1ng TEQ/m3

· Cd:0.05

· CO: 50

· Hg: 0.05

· Total Metals: 0.5 · F: 5 500 New 50 180 - (sintering) 317 Iron and steel manufa- cturing Existing 120 - 200 -

Lead and Zinc, Nickel New and 20 400 500 - · As: 0.1 or Cadmium smelting existing (40 for Zn and Cd) · Cd: 0.05

· Cu: 0.5

· Hg: 0.05

· Pb: 0.5

· Zn: 1

Copper smelting New and ·20 (smelters) 1,000 - - · As: 0.5 existing ·50 (other sources) · Cd: 0.05

· Cu: 1

· Pb: 0.2

· Hg: 0.05

Electronics manufa- New and 50 - - 5 · VOCs: 20 cturing existing · Phosphine: 1 · Arsine: 1 · HCl: 10 318 · As: 0.1 · Cd: 0.05 · Cu: 0.5 · Hg: 0.05 · Pb: 0.5 · Zn: 1

Electroplating industry New and - - - - · VOCs: 90% Existing recovery

Foundries New 20 400 400 5 - Existing 50 - 400 -

Furnace: blast oxygen, electric arc furnaces New 30 500 500 - - in the steelmaking industry, blast furnace (all installations) Existing 100 - - - -

Glass manufacturing · 1500 · Pb + Cd: 5 20 319 (Oil fire) · Other heavy New 1,000 metals (total): 5 · 700 (Gas) · As: 1

Existing 50 2000 · F: 5

· HCl: 50 Ceramic production (tiles bricks, refractory New 150 400 - 50 - bricks, stoneware or porcelain ware by firing excluding clamp kilns) Existing 150 400 - - -

Cement manufacturing New · 30 (separate raw 50 600 1 · Total Organic and lime production mill and clinker Compounds: 10 grinding, kiln) · HC: 10l · 100 (Cooler ESP) · Cadmium plus · 50 (Cooler BF) Thallium: 0.05

· Hg: 0.05

· Sum of arsenic, antimony, lead, chromium, cobalt, copper, manganese, 320 vanadium, nickel: 0.5

· Dioxins and furans: 1ng/m3 Existing · 50 (Separate raw 250 600 1 - mill and clinker grinding)

· 80 (Kiln)

· 150 (Cooler ESP)

· 50 (Cooler BF)

Mixed fertilizer plants: New 50 · 500 (nitro 5 · NH3: 5 superphosphates, phosphate ammonium nitrate, - unit) ammonium phosphates or ammonium · 70 (mixed sulphates (all acid unit) installations) Existing 100 - 30 · NH3: 50 Nitrogenous fertilizer 50 · NH3: 50 plants New and 300 Existing · urea: 50 Phosphate fertilizer plants 2kg/t acid New and · SO3: 0.15 kg/t 50 (sulphuric - - Existing acid acid plant)

Pesticides formulation New and 20 (5 where very - - - · VOCs: 20 and manufacturing Existing toxic compounds are present) · Cl: 5

· TOC: 50

· Cl: 5

· HBr: 3

· HCN: 3

· HF: 3

· H2S: 3 322 · Cl: 3

· NH3: 30

· HCl:30

Pharmaceutical - 20 - - - · Active manufacturing ingredients (each): 0.15 · *Class A compounds (total): 20 · **Class B compounds (total): 80 · Benzene :1 · Vinyl chloride: 1 · Dichloroethane:1 323 · VOCs: 20 · Bromides (as HBr): 3 · Chlorides (as HCl): 30 · (NH3): 30 · As: 0.05 · Ethylene Oxide: 0.5 · Mutagenic substances: 0.005

Petrochemicals - 20 500 300 - · HCl: 10 manufacturing · Benzene: 5 (0.1 ppb) (plant fence)

· 1,2-dichloroe- thane: 5 (1.0 ppb) (plant fence)

· Vinyl chloride: 5 (0.4 ppb) (plant fence)

324 · NH3: 15 Waste water treatment - - - - - · NH3:100-400 plants · Hydrocarbons:

400-2000

· H2S: 50-200

Textile industry New and 50 - - - · VOCs: 20 Existing · Hydrocarbons:

Dye manufacturing 50 - - - · Cl: 10

· VOCs: 20 Tanning and leather New and 50 1000 1200 - · Odour finishing Existing (objectionable); minimise impact on people and the receiving environment

· Hydrocarbons: 20

· H2S:15

325 Printing industry, and New and 100 (recovery - 2kg/t ADP - · Hydrocarbons: pulp and paper mills Existing furnace) (Air-Dried 20 Pulp) · VOCs:20

· HCl:10 Wood preserving - - - - - · VOCs: 20

Meat processing and - 150 - - - · Odour rendering (Objectionable); minimise impacts on people and the receiving environment

Sugar manufacturing - 100 2,000 · 460 (130 - · Odour ng/J or 225 (Objectionable); ppm) Liquid minimise fuels impacts on people and · 750 (260 the receiving ng/J or 365 environment ppm) Solid fuels Dairy industry - 50 - - - · Odour (Objectionable); minimise impacts on people and the receiving 326 environment Vegetable oil - 50 - - - · Odour processing (Objectionable); minimise impacts on people and the receiving environment

Other processes not - 50 2,000 · Coal: 750 - · Dioxins: 2, 3, specifically defined in (SO2) (260 ng/J or 7, 8-TCDD the table 365 ppm equivalent): maximum of · Oil: 460 1ng/Nm3 (130 ng/J or 225 ppm · Total F: 2

· Gas: 320 (86 · VOCs: 20 ng/J or 155 ppm) · Hydrocarbons 20

· As: 0.1

· Cd: 0.05 327 · Cu: 0.5

· Hg: 0.05

· Pb: 0.5

· Zn: 1

· PAHs 5 ng/m3

Thermal plants and processes/combustion installations used for steam or electricity generation

New 50 150 - - - Solid fuels ≥50MW Existing 100 200 - - -

New 50 50 75 - - Liquid fuels e.g. heavy fuel and gas oil Existing 75 100 100 - -

New 10 400 50 - - 328 Gas fired plants Existing 10 500 200 - -

New 50 45 400 - - Reciprocating engine (>10MW) Existing 50 100 400 - -

New 10 45 100 - - Reciprocating engine (>50MW) Existing 35 100 125 - -

Solid biomass New 50 (all sizes) · 70 (≥50 · 70 (≥50 5 (all · HCl: 5 (all sizes) MW) MW) sizes)

· 50 (100- · 50 300 (≥100MW) MW)

· 35 (>300 MW) Existing 100 (all sizes) 1000 (>50 200 (≥50 MW) 10 (all · HCl: 10 (all MW) sizes) sizes) · 150 · 70 (100- (≥100MW) 300 MW) 329 · 50 (>300 MW) Combustion New 50 800 400 - · H2S: 15 installations used for steam or electricity · Ni + V: 2 generation (all refinery furnaces and heaters) Catalytic cracking New 100 1200 400 - - units (all installations)

Vapour recovery units - - - - - · Total VOCs (loading and off- from vapour loading facilities with recovery units/ a throughput greater destruction units than 50000m3) using thermal treatment: 150

· Total VOCs from vapour recovery units/destruction units using non-thermal treatment: 40000

330 Industrial fuel oil New and - 500 - - · CO:100 recyclers with a existing throughput greater · Total VOCs from than 5000 ton/month vapour recovery/ destruction units: 30 All sulphur recovery - - - - - · Should achieve units 95% efficiency with 99% availability

Petroleum Refining New- 150 SRU Oil: 460 (130 - · Vanadium:5 Facilities ng/J or 225 300 FCCU · Nickel:1, ppm) · H2S: 5 Gas: 320 (86 ng/J or 155 · Benzene: 9 µg/ ppm) m3 (fence line) · VOCs (600µg/m3 fence line) And any other parameters and processes as may be prescribed from time to time The maximum permissible emission limits for stack emission for petroleum activities and operations under the upstream and midstream petroleum laws shall be determined by the Authority in consultation with the relevant lead agencies, taking into account best available technologies. The Ambient Air Quality limits set out in Schedule 2 shall apply to the general environment outside the stack. 331 Explanatory note: *Class A compounds are those that may cause significant harm to human health and the environment. They include; acetaldehyde, acrylic acid, benzyl chloride, carbon tetrachloride, chlorofluorocarbons, ethyl acrylate, halons, maleic anhydride, 1,1,1 trichloroethane, trichloromethane, trichloroethylene, and trichlorotoluene.

**Class B compounds are organic compounds of less environmental impact than Class A compounds. They include; toluene, acetone and propylene. "Existing facility" means a facility with an air pollution source constructed, in operation, installed or used on or before the coming into force of these Regulations. "New facility" means a facility with an air pollution source constructed, in operation, installed or used after the coming into force of these Regulations.

SCHEDULE 4

Regulations 9(1) (3) (4), 11(2)(b), 13(2) and 25(d)

MAXIMUM PERMISSIBLE EMISSION LIMITS FOR VEHICULAR SOURCES

A. EMISSION LIMITS FOR PASSENGER CARS (GROUP B, D, D1, DE) Emission limits/g/km

Engine type CO THC HC+NOx NOx PM

Diesel 0.5 - 0.30 0.25 0.025 Gasoline (Petrol) 1.0 0.1 - 0.08 -

CO- Carbon monoxide, THC- Total hydrocarbon, HC- Hydrocarbon, NOx- Nitrogen oxide compounds, PM-Particulate Matter

B. EMISSION LIMITS FOR LIGHT DUTY COMMERCIAL VEHICLES (GROUP BE, D, D1, DE) Emission limits/g/km Engine Reference Mass type (RM) range/kg CO THC HC+NOx NOx PM

D, D1: RM≤750 0.50 - 0.30 0.25 0.025

Diesel DE: RM>750 0.63 - 0.39 0.33 0.04

BE: RM>750≤3,500 0.74 - 0.46 0.39 0.06

D, DE: RM≤750 1.0 0.1 - 0.08 -

Gasoline DE: RM>750 (Petrol) 1.81 0.13 - 0.10 -

BE: RM>750≤3,500 2.27 0.16 - 0.11 -

D. EMISSION LIMITS FOR HEAVY DUTY COMMERCIAL VEHICLES (GROUP C, C1, C1E, CE, D1E, F, G)

Gross Vehicle Weight Emission limits/kg/kWh (GVW)/kg Smoke CO HC NOx PM limits/m-1 C, CE: ≤750kg 1.5 0.46 3.5 0.02 0.5

C1: >3,500≤7,500kg 1.5 0.46 3.5 0.02 - C1E, D1E:>750kg≤12,000kg

F. EMISSION LIMITS FOR MOTORCYCLES (A, A1) AND TRICYCLES (B1) Propulsion class/ Emission Limits/g/km Positive Ignition Category (PI) or Compression Ignition (CI) CO THC NOx Group A: PI Hybrid 1.14 0.38 0.07 Group A1 PH Hybrid 1.14 0.17 0.09 PI 2.0 0.55 0.25 Commercial Tricycles (Gasoline) B1 CI 1.0 0.1 0.55

Explanatory notes and emission inspection schedule: Category Description A: Motorcycles 3 Group A: motorcycles with a cubic capacity exceeding 125cm A and a power exceeding 11 Kw Group A1: motorcycles with a cubic capacity not exceeding A1 125 cm³ and a power not exceeding 11 Kw (light motorcycles) Group B: Motor vehicles, having a permissible maximum mass not B exceeding 3,500 kg and not more than eight seats in addition to the driver's seat. Motor vehicles of category В coupled to a trailer, the permissible B maximum mass of which does not exceed 750 kg.

Motor vehicles of category В coupled to a trailer, the permissible maximum mass of which exceeds 750 kg but does not exceed the unladen mass of the motor vehicle, where the combined B permissible maximum mass of the vehicles so coupled does not exceed 3,500 kg. BI: Tricycles and quadricycles B1 Tricycles and quadricycles Group BE: Motor vehicles of category В coupled to a trailer, the permissible BE: maximum mass of which exceeds 750 kg and exceeds the unladen mass of the motor vehicle. Motor vehicles of category В coupled to a trailer, the permissible maximum mass of which exceeds 750 kg, where the combined BE permissible maximum mass of the vehicles so coupled exceeds 3,500 kg. Group C: Motor vehicles, other than those in category D, having a permissible maximum mass exceeding 3,500 kg or motor C vehicles of category С coupled to a trailer, the permissible maximum mass of which does not exceed 750 kg. Motor vehicles, with the exception of those in category D, the permissible maximum mass of which exceeds 3,500 kg but C1 does not exceed 7,500 kg or motor vehicles of subcategory C1 coupled to a trailer, the permissible maximum mass of which does not exceed 750 kg. Motor vehicles of subcategory C1 coupled to a trailer the permissible maximum mass of which exceeds 750 kg but C1E does not exceed the unladen mass of the motor vehicle, where the combined permissible maximum mass of the vehicles so coupled does not exceed 12,000 kg. Motor vehicles of category С coupled to a trailer whose CE permissible maximum mass exceeds 750 kg. Group D: Motor vehicles used for the carriage of passengers and having D more than eight seats in addition to the driver's seat but not exceeding 30 seats in addition to the driver's seat or motor vehicles of category D coupled to a trailer, the permissible maximum mass of which does not exceed 750 kg.

Motor vehicles used for the carriage of passengers and having more than 8 seats in addition to the driver's seat but not more D1 than 16 seats in addition to the driver's seat, or motor vehicles of subcategory D1 coupled to a trailer, the permissible maximum mass of which does not exceed 750 kg.

Motor vehicles of subcategory D1 coupled to a trailer not used for the carriage of persons, the permissible maximum mass of D1E which exceeds 750 kg but does not exceed the unladen mass of the motor vehicle, where the combined permissible maximum mass of the vehicles so coupled does not exceed 12,000 kg. Motor vehicles used for the carriage of passengers with seating accommodation exceeding 30 seats in addition to the driver's DE seat and motor vehicles of this subcategory category may be coupled to a trailer whose permissible maximum mass exceeds 750 kg. Group F: Special machinery, including tractors and earth moving F equipment including graders, bulldozers and compacters. Group G: G Agricultural tractors.

B: Emissions inspection schedule Periodic On-road Vehicle Initial Modification Inspection Random category Inspection Inspection (frequency) Inspection

All After every All Yes Yes categories 12 Months

NOTE: All private passenger cars to be inspected periodically in intervals of not more than 2 years. This schedule applies to inland, air and rail transport, as appropriate, in the absence of specific units. The parameters of specific units for inland, air and rail transport under these standards shall be determined by the Authority in consultation with the lead agency, taking into account best available technologies.

SCHEDULE 5

Regulations 17(2), 18(a) and 25(d) OCCUPATIONAL EXPOSURE EMISSION LIMITS

Acetaldehyde 10 92 - Acetic acid 25 15 ppm - 336 Acetic anhydride 2.5 3 ppm - Acetone 250 500 ppm - Acetonitrile 20 102 0.002 Acetylene tetrabromide 0.1 - - a-Chloroacetophenone (Phenacyl chloride) 0.05 - - Acrolein 0.05 0.12 - Acrylamide 0.03 (IFV) - - Acrylic acid 29 59 - Acrylonitrile 2 ppm - - Allyl alcohol 0.5 ppm 4 ppm -

Allyl chloride 1ppm 2 ppm - Allyl glycidyl ether (AGE) 0.2 ppm 10ppm - Allyl propyl disulfide 0.5 ppm 3 ppm - Alpha-Alumina Respirable fraction 5 - - Alpha-Alumina Total dust 10 - 200ppm 337 Alpha-Methyl styrene 10 ppm 100 ppm - Aluminum alkyl compounds 2 - - Aluminum Metal (as Al) respirable dust 5 - - Aluminum Metal (as Al) total dust 10 - - Aluminum oxides inhalable dust 4 - 0.1ppm Aluminum salts, soluble 2 - 0.1ppm Ammonia 25 ppm 35ppm 1ppm Ammonia, anhydrous 18 - - Ammonium chloride, fume 10 - -

Ammonium sulfamate Respirable fraction 5 - 0.05ppm Ammonium sulfamate Total dust 10 - - Ammonium sulphamidate 10 - - 2-Aminopyridine 0.5 ppm - - 2-Amitrole 0.2 - - Aniline 4 - - 338 Aniline and homologs 2 ppm - - Anisidine (o-,p-isomers) 0.5 - - Antimony and compounds (as Sb) 0.5 - - Antimony and compounds except stibine (as Sb) 0.5 - - ANTU (alpha Naphthylthiourea) 0.3 - - Arsenic and arsenic compounds except arsine (as As) 0.1 - - Arsenic, inorganic compounds (as As) see 1910.1018 0.01 - - Arsenic, organic compounds (as As) 0.2 - - Arsine 0.005 ppm - -

Asbestos No safe limit - - Asphalt, petroleum fumes 5 - - Azinphos-methyl 0.2 - - Azodicarbonamide 1 - - Barium sulfate inhalable dust 10 - - Barium sulfate respirable dust 5 - - 339 Barium sulfate total dust 10 - - Barium, soluble compounds (as Ba) 0.5 - - Benomyl Respirable fraction 5 - - Benomyl Total dust 10 - - Benzene 0.5 1ppm - Benzoyl peroxide 5 - - Benzyl butyl phthalate 5 10 - Benzyl chloride 1ppm 7.9 0.1 Beta-Chloroprene 1ppm - -

Beta-Propriolactone; see 1910.1013 0.5ppm - - Bis(2-ethylhexyl) phthalate 5 - - Bis(chloromethyl) ether 0.005 - - Bis(Chloromethyl) ether; see 1910.1008 0.001ppm - - Bisphenol A 2 - - Bornan-2-one 13 19 - 340 Boron oxide Total dust 10 - - Boron tribromide - 10 - Boron trifluoride 0.1ppm - - Bromacil (ISO) 11 22 - Bromine 0.1ppm 0.2ppm - Bromoethylene 4.4 - - Bromoform 0.5ppm - - Bromomethane 20 59 0.3ppm But-2-yne-1,4-diol 0.5 - - Buta-1,3-diene 2.2 - - Butadiene (1,3-Butadiene) 1ppm 5ppm 5 [10-min]

Butan-1-ol - 154 - Butan-2-ol 308 462

Butan-2-one (methyl ethyl ketone 600 899 -

Butane 1450 1810 2-Butoxyethanol 20ppm 246 0.1ppm 341 2-Butoxyethyl acetate 133 332 -

2-Butanone (Methyl ethyl ketone) 200ppm 300 -

Butyl acetate 724 966 - Butyl lactate 30 - - Butyl mercaptan 0.5ppm - - 2-sec-Butylphenol 31 - - 2-(2-Butoxyethoxy) ethanol 67.5 101.2 - Cadmium (as Cd); see 1910.1027 0.01 - -

Cadmium and cadmium compounds except cadmium oxide fume, cadmium sulphide and 0.025 - - cadmium sulphide pigments (as Cd)

Cadmium oxide fume (as Cd) 0.025 - -

342 Cadmium sulphide and cadmium sulphide pigments 0.03 - - (respirable dust as Cd)

Caesium hydroxide 2 - - Calcium carbonate 10 - -

Calcium Carbonate (Respirable fraction) 5 - -

Calcium Carbonate (Total dust) 10 - - Calcium cyanamide 0.5 1 - Calcium hydroxide 5 4 - Calcium hydroxide (Total dust) 5 - Calcium oxide 2 4 -

Calcium silicate (inhalable dust) 10 - - Calcium silicate (respirable dust) 4 - -

Calcium silicate (Respirable fraction) 5 - -

Calcium silicate (Total dust) 10 - -

Calcium sulphate (Respirable fraction) 5 - - 343 Calcium sulphate (Total dust) 10 - - Camphor, synthetic 2ppm 3ppm 50ppm Captan (ISO) 5 15 - Carbaryl (Sevin) 0.5 - 200ppm Carbon black 3 7 6200ppm Carbon disulphide 15 - - Carbon monoxide 25 232 - Carbon tetrachloride 6.4 32 - Cellulose (inhalable dust) 10 - - Cellulose (respirable dust) 4 - -

Cellulose (Respirable fraction) 5 - - Cellulose (Total dust) 10 - - Chlorinated camphene 0.5 1 - Chlorinated diphenyl oxide 0.5 - - Chlorine 0.1ppm 0.4ppm - Chlorine dioxide 0.1ppm 0.84 - 344 Chlorine trifluoride - - 5ppm Chloroacetaldehyde - 3.3 - Chlorobenzene 4.7 14 - Chlorobromomethane 200ppm - - Chlorodifluoromethane 3590 - -

Chlorodiphenyl (42% Chlorine) (PCB) 1 - -

Chlorodiphenyl (54% Chlorine) (PCB) 0.5 - -

Chloroethane 134 - - Chloroform (Trichloromethane) 2ppm - -

Chloromethane 105 210 - Chloropicrin 0.1ppm - - Chlorosulphonic acid 1 - - Chlorpyrifos (ISO) 0.2 0.6 - 1-Chloro-1-nitropropane 2ppm - -

1-Chloro-2,3epoxypropane ((Epichlorohydrin)) 1.9 5.8 - 345 1-Chloro-4-nitrobenzene 1 2 -

2-Chloro-6-(trichloromethyl) pyridine 10 (IFV) 20 -

2-Chloro-6-(trichloromethyl) pyridine/(Respirable 5 - - fraction)

2-Chloro-6-(trichloromethyl)pyridine (Total dust) 10 20 -

2-Chloroethanol; See Ethylene chlorohydrin - 3.4 -

Chromium 0.5 - -

Chromium (II) compounds (as Cr) 0.5 - -

Chromium (III) compounds (as Cr) 0.03 - - 346 Chromium (VI) compounds 0.0002 0.0005 0.06 (2-hr)

Chromium metal and insol. salts (as Cr) 0.5 - -

Clopidol 3 (IFV) - - Clopidol (Respirable fraction) 5 - - Clopidol (Total dust) 10 20 -

Coal tar pitch volatiles (benzene soluble fraction), anthracene, BaP, phenanthrene, acridine, chrysene, 0.2 - - pyrene)

Cobalt metal, dust, and fume (as Co) 0.02 - -

347 1ppm (30- Coke oven emissions 0.15 - min)

Copper Dusts and mists (as Cu) 1 - -

Copper Fume (as Cu) 0.2 - - Cotton dust(l) 0.1 - -

Crag herbicide (Sesone) (Respirable fraction) 5 - -

Crag herbicide (Sesone) (Total dust) 10 - -

Cresol, all isomers 5 ppm - -

Cryofluorane (INN) 7110 8890 - Cumene 50 ppm 250 - Cyanamide 1 - - Cyanides (as CN) 5 - - Cyanogen chloride - 0.77 - Cyclohexane 100 1050 - 348 Cyclohexanol 50 - - Cyclohexanone 20 82 - Cyclohexene 20 - - Cyclohexylamine 41 - - Cyclopentadiene 75 - - Decaborane 0.05 0.15ppm - Demeton (Systox) 0.05 - - Diacetone alcohol (4-Hydroxy-4-methyl-2- 50 - - pentanone) Diacetyl 0.07 0.36 - Dialkyl 79 phthalate 5 - -

Diallyl phthalate 5 - -

Diatomaceous earth, natural, respirable dust 1.2 - -

Diazomethane 0.2 - - Dibenzoyl peroxide 5 - - Dibismuth tritelluride 10 20 - 349 Diborane 0.1 - -

1,2-Dibromo-3-chloropropane (DBCP) 0.001 - -

1,2-Dibromoethane 3.9 - -

1,2-Dibromoethane(Ethylene dibromide) 3.9 - -

Diboron trioxide 10 20 - Dibutyl hydrogen phosphate 8.7 17 - Dibutyl phosphate 5 2ppm - Dibutyl phthalate 5 10 - Dichloroacetylene - 0.39 -

Dichlorodifluoromethane 1000 -

Dichlorodiphenyltrichloroethane (DDT) 1 -

Dichloroethyl ether 5 10ppm - Dichlorofluoromethane 43 - - Dichloromonofluoromethane 10 - - 350 Dichlorotetrafluoroethane 1000 - - Dichlorvos (DDVP) 0.1 (IFV) - - 1,2-Dichlorobenzene 153 306 - 1,1-Dichloroethane 50 ppm - - 1,2-Dichloroethane 100 ppm - - 1,2-Dichloroethylene 200 ppm - -

1,2-Dichloroethylene, cis:trans isomers 60:40 806 1010 -

1,1-Dichloro-1-nitroethane 2 ppm - -

2,4-Dichlorophenoxy ethyl sulphate - - -

1,3-Dichloro-5,5-dimethyl hydantoin 0.2 0.4 -

1,4 Dichlorobenzene 12 60 -

2,2'-Dichloro-4,4'methylene dianiline (MbOCA) 0.005 - -

2,4-D (Dichlorophen-oxyacetic acid) 10 20 - 351 2,6-Di-tert-butyl-p-cresol 10 - - 1,4-Dioxane 73 - - Dicyclohexyl phthalate 5 - - Dicyclopentadiene 27 - -

Dicyclopentadienyl iron Respirable fraction 5 - -

Dicyclopentadienyl iron Total dust 10 - -

Diethyl ether 310 620 - Diethyl phthalate 5 10 -

Diethyl sulphate 0.32 - - Diethylamine 15 30 - 2-Diethylaminoethanol 2 ppm - - Difluorodibromomethane 100 ppm - - Diglycidyl ether (DGE) 0.01 ppm - - Dihydrogen selenide(as Se) 0.07 0.17 - 352 Diisobutyl ketone 25 ppm - - Diisobutyl phthalate 5 - - Diisodecyl phthalate 5 - - Diisononyl phthalate 5 - - Diisooctyl phthalate 5 - - Diisopropyl ether 1060 1310 - Diisopropylamine 21 - - Dimethoxymethane 3160 3950 - Dimethyl acetamide 10 ppm - - Dimethyl ether 766 958 5 ppm Dimethyl phthalate 5 10 -

Dimethyl sulphate 0.1 ppm - - Dimethyl sulphate 0.26 - -

Dimethyl-1,2-dibromo-2,2-dichloroethylphosphate 0.1 (IFV) - -

Dimethylamine 3.8 11 -

Dimethylaniline (N,N-Dimethylaniline) 5 ppm 10ppm 0.5 ppm 353 Dimethylformamide 5 ppm - 1 ppm Dimethylphthalate 5 - - 2,6-Dimethylheptan-4-one 148 - - 1,1-Dimethylhydrazine 0.01 ppm - - 2-Dimethylaminoethanol 7.4 22 - Dinitrobenzene (all isomers) 0.15 ppm - Dinitrobenzene, all isomers 1 3.5 - Dinitro-o-cresol 0.2 (IFV) - -

5 ppm (10 Dinitrotoluene 0.15 - minutes per day) Dinonyl phthalate 5 - - Dioxane (Diethylene dioxide) 0.28 ppm - - Diphenyl (Biphenyl) 0.2 ppm - - 354 Diphenyl ether 7 14 - Diphenylamine 10 20 - Diphosphorus pentasulphide 1 2 - Dipropylene glycol methyl ether 100 ppm 150ppm - Diquat dibromide (ISO) 0.5 1 -

Di-sec octyl phthalate (Di-(2-ethylhexyl) phthalate) 5 10 -

Disodium disulphite 5 - -

Disodium tetraborate, anhydrous 1 - -

Disodium tetraborate, decahydrate 5 - -

Disodium tetraborate, pentahydrate 1 - -

Disphosphorus pentoxide 1 2 - Disulphur dichloride - 5.6 - 355 6,6'-Di-tert-butyl-4,4'thiodi-m-cresol 10 20 -

Diuron (ISO) 10 - - Emery inhalable dust 10 - - Emery respitable dust 4 - - Emery total dust 10 - - Enflurane 383 - - Epichlorohydrin 0.05 - - Ethyl p-nitrophenyl benzenethionophosphonate 0.1 (IFV) - - 2-Ethoxyethanol 8 - -

Ethane-1,2-diol particulate 10 - -

Ethane-1,2-diol vapour 52 104 - Ethanethiol 1.3 5.2 - Ethanol 1920 - - Ethanolamine 3 ppm 6ppm - 356 2-Ethoxyethanol (Cellosolve) 5 ppm - - 2-Ethoxyethyl acetate 11 - -

2-Ethoxyethyl acetate (Cellosolve acetate) 5 ppm - -

2-ethylhexan-1-ol 5.4 - - 2-Ethylhexyl chloroformate 8 - - Ethyl acetate 400 ppm 1468 - Ethyl acrylate 5 ppm 42 0.5 ppm Ethyl alcohol (Ethanol) 1000 ppm 1000ppm 1000 ppm

Ethyl amyl ketone (5-Methyl-3-heptanone) 25 ppm - 0.1 ppm

Ethyl benzene 5 ppm 30ppm - Ethyl bromide 5 ppm - -

Ethyl butyl ketone (3-Heptanone) 50 ppm 75ppm -

Ethyl chloride 100 ppm - - Ethyl chloroformate 4.5 - - 357 Ethyl cyanoacrylate - 1.5 - Ethyl ether 400 ppm 500ppm - Ethyl formate 100 ppm 100ppm - Ethyl mercaptan 0.5 ppm - - Ethyl silicate 10 - - Ethylamine 3.8 11 - Ethylbenzene 441 552 - Ethylene glycol dinitrate 0.05 ppm 0.1 - Ethylene oxide 1 ppm 5ppm - Ethylenediamine 10 ppm - - Ethyleneimine 0.05 ppm 0.1ppm -

4-Ethylmorpholine 24 96 - Ferbam Total dust 5 - -

Ferrous foundry inhalable dust 10 - -

Ferrous foundry 4 - - respirable dust 358 Ferrovanadium dust 1 3 - Flour dust 10 30 - Fluoride (inorganic as F-) 2.5 - - Fluorine 0.1 ppm 1.6 0.03 ppm Formaldehyde 0.1 ppm 0.3ppm - Formamide 37 56 - Formic acid 5 ppm 10ppm 2 Fume (as V2O5) 0.05 - - Furfural 0.2 ppm - - Furfuryl alcohol 10 ppm 15ppm -

2-Furaldehyde (furfural) 8 20 - Germane 0.64 1.9 - Glutaraldehyde 0.2 0.2 -

Glycerin (mist) Respirable fraction 5 - -

Glycerin (mist) Total dust 10 - - 359 Glycerol trinitrate 0.095 0.19 - Glycerol (mist) 10 10 - Glycidol 2 ppm 2ppm - Grain dust 4 4 -

Graphite 10 10 - inhalable dust

Graphite 4 4 - (respirable)

Graphite(synthetic respirable fraction) 2 - -

Graphite(synthetic Total dust) 10 - - Gypsum (Respirable fraction) 5 - - Gypsum (Total dust) 10 - -

Gypsum (inhalable dust) 10 - -

Hafnium 0.5 - - 360 Halothane 82 - -

Hardwood dust (inhalable fraction) 3 - -

Heptan-2-one 237 475 - Heptan-3-one 166 475 - Heptane (n-Heptane) 400 ppm 440ppm 5 ppm Hexachloroethane 1 ppm - - Hexachloronaphthalene 0.2 - - Hexan-2-one 21 - - Hexone (Methyl isobutyl ketone) 20 ppm 75ppm -

1,6-Hexanolactam dust and vapour 10 20 -

1,6-Hexanolactam dust only 1 3 0.002

2-Hexanone (Methyl n-butyl ketone) 1 ppm 10ppm -

361 2-Hydroxypropyl acrylate 2.7 - - Hydrazine 0.01 ppm 0.13 50 ppm Hydrogen bromide 10 - Hydrogen chloride 0.3 ppm 8 - Hydrogen cyanide 1 5 - Hydrogen fluoride (as F) 1.5 2.5 - Hydrogen peroxide 1.4 2.8 - Hydrogen selenide (as Se) 0.05 ppm - - Hydrogen sulphide 7 14 - Hydroquinone 0.5 - - 4-Hydroxy-4methylpentan-2-one 241 362 -

Indene 48 - - Indium and compounds (as In) 0.1 0.3 - inhalable dust 4 - -

Insoluble Compounds - Total dust 10 - -

Iodine 0.01 ppm (IFV) 1.1 - 362 Iodoform 9.8 16 0.05 (IHL) Iodomethane 12 - - Iron oxide 5 - - Iron oxide, fume (as Fe) 5 10 - Iron salts (as Fe) 1 2 - Isoamyl acetate 50 ppm 100ppm -

Isoamyl alcohol (primary and secondary) 100 ppm 125ppm -

Isobutyl acetate 150 ppm 903 - Isobutyl alcohol 50 ppm - Isocyanates, all (as -NCO) 0.02 0.07 -

Isoflurane 383 - - Isoocytl alcohol (mixed isomers) 271 - - Isopentane 1800 - - Isophorone 4 ppm - - Isopropyl acetate 250 ppm 849 - Isopropyl alcohol 200 ppm 400ppm - 363 Isopropyl chloroformate 5.1 - - Isopropyl ether 250 ppm 310ppm - Isopropyl glycidyl ether (IGE) 50 ppm 75ppm - Isopropylamine 5 ppm 10ppm - 2,2'-Iminodi(ethylamine) 4.3 - - Kaolin Total dust 10 - - Kaolin respirable dust 2 - - Ketene 0.5ppm 2.6 - L.P.G. (Liquified petroleum gas) 1000 ppm - - Lead inorganic (as Pb); 0.05 - - Limestone (Respirable fraction) 5 - -

Limestone (Total dust) 10 - -

Limestone 10 - - (total inhalable)

Liquefied petroleum gas 1750 2180 - Lithium hydride 0.025 0.02 1000 ppm 364 Lithium hydroxide 1 - Magnesite Inahalable 10 - - Magnesite Total dust 10 - -

Magnesium oxide fume - Inhalable 10 - -

Magnesium oxide fume - respirable 4 - -

Magnesium oxide fume - Total Particulate 10 - -

Malathion - Total dust 10 - 350 ppm Maleic anhydride 0.01 - -

Manganese compounds (as Mn) - 3 -

Manganese compounds (as Mn) inhalable 0.2 - -

Manganese compounds (as Mn) respirable 0.05 - -

365 Manganese fume (as Mn) 0.2 3 - Marble inhalable fraction 10 - 0.04 ppm Marble Respirable fraction 5 - - Marble (Total dust) 10 - - Mercaptoacetic acid 3.8 - -

Mercury and divalent inorganic compounds including mercuric oxide and mercuric chloride 0.02 - - (measured as mercury)

Mesityl oxide 15 ppm 25ppm - Methacrylic acid 72 143 0.5 ppm

Methacrylonitrile 2.8 - - Methanethiol 1 - - Methanol 266 333 0.2 Methoxychlor - (Total dust) 10 - - 2-Methoxyethanol 3 - - 366 (2-methoxymethylethoxy) propanol 308 - 40 ppm 2-Methoxyethyl acetate 5 - - 2-Methoxyethyl acetate (Methyl cellosolve acetate) 0.1 ppm - - 1-Methoxypropan-2-ol 375 560 - 1-Methoxypropyl acetate 274 548 - 2-(2-Methoxyethoxy) ethanol 50.1 - - Methyl acetylene (Propyne) 1000 - - Methyl acetylene propadiene mixture (MAPP) 1000 1250ppm -

Methyl acrylate 2ppm - - Methyl alcohol 200 250ppm - Methyl bromide 1 20ppm - Methyl chloride 100 - - Methyl chloroform (1,1,1-Trichloro-ethane) 350 450ppm - 367 Methyl cyanoacrylate - 1.4 - 2-Methylcyclohexanone 233 350 - Methyl ethyl ketone peroxides (MEKP) 1.5 - Methyl formate - 250 - Methyl hydrazine (Monomethylhydrazine) 0.01 - - Methyl iodide 2 - - Methyl isoamyl ketone 20 ppm 50ppm - Methyl isobutyl carbinol 20 ppm 40ppm -

Methyl isocyanate 0.02 0.06ppm - Methyl mercaptan 0.5 - - Methyl methacrylate 50 416 - Methyl n-amyl ketone 50 - - 2-Methylpentane-2,4-diol 123 123 - 2-Methylpropan-1-ol 154 231 50 ppm 368 2-Methylpropan-2-ol 308 462 - Methylal (Dimethoxy-methane) 1000 - - Methylamine 5 15ppm - 3-Methylbutan-1-ol 366 458 - 4,4'-Methylenedianiline 0.08 - - Methylcyclohexane 400 - - Methylcyclohexanol 50 356 - Methylene bisphenyl isocyanate (MDI) 0.05 - - Methyl-tert-butyl-ether 183.5 367 -

5-Methylheptan-3-one 53 107 - 5-Methylhexan-2-one 95 475 - 4-Methylpentan-2-ol 106 170 - 4-Methylpentan-2-one 208 416 - Mica Total inhalable 10 - -

Molybdenum compounds (as Mo) insoluble 10 20 - 369 compounds

Molybdenum compounds (as Mo) soluble 5 10 - compounds Monochloroacetic acid 1.2 - - Monomethyl aniline 0.5 - - Morpholine 20 72 - N,N-Dimethylacetamide 36 - - N,N-Dimethylaniline 25 50 - N,N-Dimethylethylamine 30 46 0.05 ppm N,N-Dimethylformamide 15 - - n-Amyl acetate 50 100ppm -

Naphtha (Coal tar) 100 ppm - - Naphthalene 0.1 ppm 15ppm - n-Butyl acrylate 5 26 - n-Butyl alcohol 20 ppm - - n-Butyl chloroformate 5.7 - - n-Butyl glycidyl ether (BGE) 3 - - 370 n-Butyl-acetate 150 ppm 200ppm - Neopentane 1800 - - N-Ethylmorpholine 5 - - n-Heptane 2085 - - n-Hexane 50 - - Nickel carbonyl (as Ni) 0.00 ppm - - Nickel, metal and insoluble compounds (as Ni) 0.5 - - Nickel, soluble compounds (as Ni) 0.1 - - Nicotine 0.075 ppm - -

Nitric acid 2 4ppm - Nitric oxide 25 - - Nitrobenzene 1 - - Nitroethane 100 - - Nitrogen dioxide 0.2ppm 1.91 - 371 Nitrogen monoxide * 30 - - Nitrogen trifluoride 10 - - Nitroglycerin 0.05 - - Nitromethane 2 ppm 381 - Nitrotoluene (all isomers) 2 ppm - - Nitrotrichloromethane; see Chloropicrin - - 385 ppm Nitrous oxide 183 - - 1-Nitropropane 25 - - 2-Nitropropane 10 - 5 ppm

n-Methyl-2-pyrrolidone 40 80 - N-Methylaniline 2.2 - - N-Nitrosodimethylamine; see 1910.1016 - - 0.05ppm n-Propyl acetate 200 ppm 1060 0.1 ppm n-Propyl alcohol 100 ppm - - 372 n-Propyl nitrate 25 ppm - - Octachloronaphthalene 0.1 - - Octane 300 - - o-Dichlorobenzene 25 306 - Oil mist, mineral 5 10 - o-Methylcyclohexanone 50 75 - Organo (alkyl) mercury 0.01 - - Orthophosphoric acid 1 - - Osmium tetraoxide (as Os) 0.002 - -

Osmium tetroxide (as Os) 0.0016 0.0047 - o-Toluidine 2 - - Oxalic acid 1 2 610 ppm 2,2'-Oxydiethanol 101 - - Ozone 0.05 0.3 - Paracetamol, (inhalable dust) 10 - 1800 373 Paraffin wax, fume 2 6 15.6 Paraquat dichloride (ISO), respirable dust 0.08 - - Paraquat, respirable dust 0.05 - - Parathion 0.05 (IFV) - - Particulates Not Otherwise Regulated (PNOR)(i) 5 - - Respirable fraction Particulates Not Otherwise Regulated (PNOR)(i) 10 - 1 ppm (Total dust) PCB; see Chlorodiphenyl (42% and 54% chlorine) - - 0.14 ppm p-Dichlorobenzene 10 110 -

Pentaborane 0.005 0.015 0.2 ppm Pentacarbonyliron (as Fe) 8 - 0.15 ppm Pentachloronaphthalene 0.5 (IFV) - - Pentaerythritol Respirable fraction 5 - - Pentaerythritol (Total dust) 10 - - Pentaerythritol 10 20 - 374 inhalable dust Pentaerythritol 4 - - respirable dust Pentan-2-one 716 895 - Pentan-3-one 716 895 - Pentane 600ppm - - 2-Pentanone (Methylpropyl ketone) 200 ppm 150 0.1 2-Phenylpropene 246 - 5.6 (15 min) 2-Pyridylamine 2 - 0.5 ppm Pentyl acetates (all isomers) 270 - - Perchloromethyl mercaptan 0.1 ppm - -

Perchloryl fluoride 3 ppm 6 - Petroleum distillates (Naphtha) (Rubber Solvent) 1600 - - Phenol 5 ppm - - Phenyl ether, vapor 1 ppm - - Phenyl glycidyl ether (PGE) 0.1 ppm - - Phenylhydrazine 0.1 ppm 10 - 375 Phorate (ISO) 0.05 - - Phosdrin (Mevinphos) 0.01 (IFV) 0.03 - Phosgene 0.08 - - Phosgene (Carbonyl chloride) 0.1 ppm - - Phosphine 0.05 ppm - - Phosphoric acid 1 - - Phosphorus (yellow) 0.1 - - Phosphorus pentachloride 0.1 ppm - - Phosphorus pentasulphide 1m 3 - Phosphorus trichloride 0.2 ppm 0.5ppm -

Phosphorus, yellow 0.1 - - Phosphoryl trichloride 1.3 3.8 - Phthalic anhydride 0.002 (IFV) 0.005 - Picloram (ISO) 10 20 - Picloram Respirable fraction 5 - - Picloram (Total dust) 10 - - 376 Picric acid 0.1 0.3 - Pindone (2-Pivalyl-1,3-indandione) 0.1 - - Piperazine 0.1 0.3 - Piperazine dihydrochloride 0.1 0.3 - Piperidine 3.5 - - Plaster of paris inhalable fraction 10 - - Plaster of paris Respirable fraction 5 - - Plaster of paris Total dust 10 - - Platinum (as Pt) Metal 1 - - Platinum (as Pt) Metal - Soluble Salts 0.002 - -

Platinum compounds, soluble (except certain 0.002 - - halogeno-Pt compounds) (as Pt) Platinum metal 5 - - p-Nitroaniline 3 - - p-Nitrochlorobenzene 0.1 ppm - -

377 Polyvinyl chloride inhalable dust 10 - - Polyvinyl chloride respirable dust 4 - - Portland cement Inhalable dust 10 - - Portland cement Respirable dust 4 - - Potassium cyanide (as cyanide) 1 5 - Potassium hydroxide - 2 - p-Phenylene diamine 0.1 - - p-Phenylenediamine 0.1 - - Prop-2-yn-1-ol 2.3 7 -

Propan-1-ol 500 625 - Propan-2-ol 999 1250 - Propane 1000 ppm - - Propane-1,2-diol particulates 10 - - Propane-1,2-diol total vapour 474 - - Propionic acid 31 46 - 378 Propoxur (ISO) 0.5 2 - Propranolol 2 6 - Propylene dichloride 10 110ppm - Propylene imine 0.2 ppm 0.4 - Propylene oxide 2 ppm - - p-tert-Butyltoluene 1 ppm 20ppm - Pyrethrum 5 - - Pyrethrum (purified of sensitising lactones) 1 - - Pyridine 1ppm 33 - Pyrocatechol 23 - - Quartz 0.025 - -

Quinone 0.1 ppm - - Refractory ceramic fibres and special purpose fibres 5 - - - total inhalable dust Resorcinol 46 92 - Respirable dust and fumes (as V2O5) 0.05 - -

Rhodium (as Rh) metal fume and dust 0.1 0.3 - 379 Rhodium (as Rh) soluble salts 0.001 0.003 - Rhodium (as Rh), metal fume and insoluble 0.1 - - compounds Rhodium (as Rh), soluble compounds 0.001 - - Ronnel 5 (IFV) - - Rosin-based solder flux fume - 0.15 - Rotenone 5 - - Rotenone (ISO) 5 10 - Rouge inhalable fraction 10 - - Rouge Respirable fraction 4 - -

Rouge Total dust 10 - - Rouge Respirable 4 - - Rouge Total inhalable 10 - - Rubber fume 0.6 - - Rubber process dust 6 - - sec-Butyl acetate 200 ppm 1210 - 380 sec-Butyl alcohol 100 ppm 150 - sec-Hexyl acetate 50 ppm - - Selenium and compounds, except hydrogen selenide 0.1 - - (as Se) Selenium compounds (as Se) 0.2 - - Selenium hexafluoride (as Se) 0.05 ppm - - Silane 0.67 1.3 - Silica, amorphous Inhalable dust 6 - - Silica, amorphous Respirable dust 2.4 - - Silica, fused respirable dust 0.08 - -

Silica, respirable crystalline (respirable fraction) 0.1 - - Silicon carbide (not whiskers) total inhalable 10 - - Silicon carbide (not whiskers) respirable 4 - - Silicon carbide Respirable fraction 3 - - Silicon carbide Total dust 10 - - Silicon inhalable dust 10 - - 381 Silicon respirable dust 4 - - Silver (soluble compounds as Ag) 0.01 - - Silver, metal and soluble compounds (as Ag) 0.01 - - Silver, metallic 0.1 - - Sodium 2-compounds 10 20 - Sodium azide (NaN3) 0.1 0.3 - Sodium cyanide (as cyanide) 1 5 - Sodium fluoroacetate 0.05 0.15 - Sodium hydrogen sulphite 5 - -

Sodium hydroxide - 2 - Softwood dust 5 - - Starch Respirable fraction 5 - - Starch Total dust 10 - - Starch respirable 4 - - Starch total inhalable 10 - 1800(15-min) 382 Stibine 0.1 ppm - - Stoddard solvent 100 ppm - - Strychnine 0.15 - - Styrene 430 1080 - Subtilisins 0.00004 - - Sucrose Respirable fraction 5 20 - Sucrose Total dust 10 20 0.01 ppm Sulfotep (ISO) 0.1 - - Sulphur hexafluoride 1000 ppm -

Sulphuric acid 0.1 3 - Sulphuryl fluoride 5 ppm 10 - Sulphur dioxide 1.3 2.7 - Sulphur hexafluoride 6070 7590 - Sulphuric acid (mist) 0.05 - - Sulphuryl difluoride 21 42 0.5 ppm 383 Talc, respirable dust 1 - - Tantalum (total) 5 10 - TEDP (Sulfotep) 0.1 - - Tellurium and compounds (as Te) 0.1 - - Tellurium and compounds, except hydrogen telluride 0.1 - - (as Te) Tellurium hexafluoride (as Te) 0.02 ppm - - Temephos 1 - - Temephos Respirable fraction 5 - - Temephos Total dust 10 - -

TEPP (Tetraethyl pyrophosphate) 0.01 (IFV) - - Terphenyl, hydrogenated 19 48 - Terphenyls, all isomers - 4.8 - tert-Butyl acetate 966 1210 - tert-Butyl alcohol 100 ppm 150ppm - Tertiary-butyl-methylether 183.5 367 - 384 Tetracarbonylnickel (as Ni) - 0.24 0.02 ppm Tetrachloroethylene 138 275 - Tetrachloronaphthalene 2 mg/m3 - - Tetraethyl lead (as Pb) 0.075 - - Tetraethyl orthosilicate 44 - - Tetrahydrofuran 50 100ppm - Tetramethyl lead, (as Pb) 0.075 - 2000 ppm Tetramethyl succinonitrile 0.5 (IFV) - 1 ppm Tetranitromethane 0.005 ppm - - Tetrasodium pyrophosphate 5 - - 1,1,1,2-Tetrachloro-2,2-difluoroethane 100 ppm - -

1,1,1,2-Tetrafluoroethane (HFC 134a) 4240 - - 1,1,2,2-Tetrabromoethane 7.2 - - 1,1,2,2-Tetrachloro-1,2-difluoroethane 50 ppm - - 1,1,2,2-Tetrachloroethane 1 ppm - - 1,1,1-Trichloroethane 555 - - 1,1,2-Trichloro-1,2,2-trifluoroethane 1000 ppm 1250ppm - 385 1,1,2-Trichloroethane 10 ppm - - 1,2,3-Trichloropropane 0.005 - - Tetryl (2,4,6-Trinitrophenylmethylnitramine) 1.5 - - Thallium, soluble compounds (as TI) 0.1 - - Thiram 5 - - Tin compounds, inorganic except SnH4, (as Sn) 2 4 - Tin compounds, organic, except Cyhexatin (ISO), 0.1 0.2 - (as Sn) Tin, inorganic compounds (except oxides) (as Sn) 2 - Tin, organic compounds (as Sn) 0.1 0.2 - Titanium dioxide - Total dust 10 - -

Titanium dioxide Respirable 4 - - Titanium dioxide Total inhalable 10 - - 4,4'-Thiobis (6-tert,Butyl-m-cresol) 1 (IHL) - - 4,4'-Thiobis (6-tert,Butyl-m-cresol) Respirable 5 - - fraction 4,4'-Thiobis (6-tert,Butyl-m-cresol) Total dust 10 - -

386 Toluene 191 384 - Toluene-2,4-diisocyanate (TDI) 0.001 ppm (IFV) 0.005 - Tributyl phosphate 0.2 ppm - - Tributyl phosphate, all isomers 5 5 - Trichloroethylene 550 850 - Trichloronaphthalene 5 - - Trichloronitromethane 0.68 2.1 - Tridymite 0.05 - - Triethylamine 8 1ppm - Trifluorobromomethane 1000 ppm - -

Triglycidyl isocyanurate (TGIC) 0.1 - - Trimellitic anhydride 0.04 0.12 - Trimethyl phosphite 10 - - Trimethylbenzenes, all isomers or mixtures 125 - - 1 ppm (15 2,4,5-T (2,4,5-tri-chlorophenoxyacetic acid) 10 - Min) 2,4,6-Trinitrotoluene 0.5 - - 387 Triorthocresyl phosphate 0.02 (IFV) - - Tri-o-tolyl phosphate 0.1 0.3 - Triphenyl phosphate 3 6 - Tripoli (as quartz) 0.025 - - Tungsten and compounds (as W) soluble compounds 1 3 - Tungsten and compounds insoluble 5 10 - compounds Turpentine 20 ppm 850 - Vanadium 0.05 (IHL) - - Vanadium pentoxide 0.05 - - Vegetable oil mist Respirable fraction 5 - -

Vegetable oil mist Total dust 10 - - Vinyl acetate 17.6 35.2 - Vinyl chloride; 1 ppm - 0.05 Vinyl toluene 50 ppm 100ppm - Vinylidene chloride 8 20 - Warfarin 0.1 - - 388 Wool process dust 10 - - Xylene, o-,m-,p- or mixed isomers 220 441 - Xylidine 0.5 ppm - - Yttrium 1 - - Zinc chloride fume 1 2 - Zinc distearate 10 20 - Zinc distearate inhalable dust 4 - - Zinc oxide fume 2 10 300 ppm Zinc oxide Respirable fraction 2 10 - Zinc oxide Total dust 10 - - Zirconium compounds (as Zr) 5 10 -

Explanatory notes • The Carc, Sen and Sk notations are not exhaustive • TWA reference period - is Time-weighted Average reference period • IFV - Inhalable fraction of vapour • Default units are mg/m3 • PPM is used where mg/m3 is not the default • For the avoidance of doubt, prohibited chemicals will not be regulated. • C: Ceiling of maximum allowable concentration.

SCHEDULE 6

Regulations 20(1), 24(f), 25(d) and 28(1)

INDOOR AIR QUALITY STANDARDS

No. Pollutant Averaging time Concentration (mg/m3) Asbestos - No safe level of exposure. Benzene - No safe level of exposure. 15 minutes 100 1-hour 35 Carbon monoxide 8-hours 10 24-hour 7 Formaldehyde 30-minutes 0.1 Naphthalene Annual average 0.01 1-hour 200 μg/m3 24-hours 30 μg/m3 Nitrogen dioxide 40 μg/m3 Annual average

Ozone 8-hours 100 μg/m3 24-hours 60 μg/m3 PM10 Annual average 40 μg/m3 24-hours 35 μg/m3 PM2.5 Annual average 25 μg/m3 Polycyclic No safe level of Aromatic - exposure. Hydrocarbon (PAH) Radon - 100 Bq/m3 10 minutes 500 μg/m3 Sulphur dioxide 1-hour 50 µg/m3 SO2 24-hours 20 μg/m3 Tetrachloroethylene Annual average 0.25 Trichloroethylene Annual average 4.3 × 10-7 per μg/m3

SCHEDULE 7

Regulations 29(1) and 35(1)

SHORT TERM AIR QUALITY ACTION PLAN

persons responsible for the development and implementation of air quality plans)

……………………………………………………………………… ………………………………………………………………………

4 Nature and assessment of pollution, including- (a) Concentrations observed over previous years (before the implementation of the improvement measures) ………………………………………………………………… …………………………………………………………………

pollution and to improve air quality (a) Local, national and regional measures (as appropriate) ………………………………………………………………… ………………………………………………………………… (b) Observed impacts of the measures ……………………………………………………………… ……………………………………………………………… (c) Schedule for implementation ………………………………………………………………… …………………………………………………………… (d) Estimated time required for improvement of air quality and to attain the objectives of this paragraph (facilities with the greatest amount of pollution may be given more time to comply as compared to facilities where pollution is less, but compliance measures may be stricter). ……………………………………………………………… ………………………………………………………………

researched on for the long term management of air quality. …………………………………………………………………… ………………………………………………………………………

……………………………………………………………………… ………………………………………………………………………

SCHEDULE 8

Regulation 37(1)

ANNUAL EMISSIONS COMPLIANCE REPORT

plot number, village, parish subcounty/town council, division, city/district) ……………………………………………………………………… ………………………………………………………………………

……………………………………………………………………… ………………………………………………………………………

……………………………………………………………………… ………………………………………………………………………

……………………………………………………………………… ………………………………………………………………………

…………………………………………………………………… ………………………………………………………………………

Yes/No. (Tick as appropriate).

If yes, state the parameters exceeded (including indoor air standards) and by how much ……………………………………………………………………… ………………………………………………………………………

sources (expressed in the units of applicable emission limits). ……………………………………………………………………… ………………………………………………………………………

……………………………………………………………………… ……………………………………………………………………

correct the conditions causing the excess emissions. (a) ………………………………………………………………… (b) …………………………………………………………………

of corrective actions ……………………………………………………………………… ………………………………………………………………………

Signature …….………date ……………………………………20……..

Position …………………………

____________________________________________________________

Official use only

Observations/recommendations/actions required ……………………………………………………………………………… ……………………………………………………………………………… ……… ……………………………………………………………………… ……………… ………………………………………………………………

Dated this…………………. ……………………………………. 20…….

Signature…………………………………… (Seal)

SCHEDULE 9 Regulations 42(2) and 50(2) FORMS

FORM 1

APPLICATION FOR AIR POLLUTION CONTROL LICENCE

(To be completed in triplicate) Application Reference No_________________

Licence No___________________________ (in case of renewal)

Part A: General

the applicant (whether individual, partnership or company) ______________________________________________________ ______________________________________________________

location and the processes or activities undertaken ______________________________________________________ ______________________________________________________

experience of the applicant including the personnel _____________________________________________________ _____________________________________________________

and appropriate measures to control emissions within acceptable limits have been taken to no avail. _______________________________________________________ _______________________________________________________

be used at the facility or operations _______________________________________________________ _______________________________________________________

and equipment to be acquired, including any modifications in the technology required _______________________________________________________ _______________________________________________________

_______________________________________________________ _______________________________________________________

levels, nature and concentrations of actual emissions) (a) __________________________________________________ (b) __________________________________________________

shut-down of equipment (a) __________________________________________________ (b) __________________________________________________

proposed activities and the schedule for bringing the facility into compliance (tick as applicable)- • Expected emissions from the facility are likely to exceed the applicable emission standard; • Dispersion modelling is done for any expected emissions from the facility, and the emissions are found to be likely to exceed the ambient air quality standard; or • Expected ambient air quality measurements at required monitoring locations exceed a prescribed air quality standard.

(attach sketch and GPS coordinates)

_______________________________________________________ _______________________________________________________

From ___________ day/______________/month ___________/year

or fugitive emissions or other operations contributing to the air pollution in the areas of concern ________________________________________________ _______________________________________________________

_____ month ____year

it is to be developed/is available, or needs to be reviewed and updated). _______________________________________________________ _______________________________________________________ (Attach other information, if necessary)

PART B. Facility compliance record in the case of renewal of licence.

_______ (Tick as appropriate)

were measures taken to bring the emissions within acceptable limits?

If Yes, state the nature of those measures. _______________________________________________________ _______________________________________________________

If Yes, state why you need more time to comply? _______________________________________________________ _______________________________________________________

bring the facility into compliance with acceptable emission limits? _______________________________________________________ _______________________________________________________

implemented for the facility? Yes_____ No_____

If yes, provide summary of the Environment Management System (EMS), and level of implementation of the EMS. _______________________________________________________ _______________________________________________________

plan up todate and functional? Yes _____ No ______ (Tick as appropriate)

If No, indicate how it will be updated if the facility licence is renewed (if application is for renewal of licence).

_______________________________________________________ _______________________________________________________

______ Partially _______ (Tick as appropriate)

If Yes, attach a report of the nature of technologies and processes and the proposed best environment practices and best available technologies likely to be used in the project ___________________ _______________________________________________________ _______________________________________________________

audits if due? Yes ________ No________ (tick as appropriate)

If Yes, provide copies of the audit report and responses to the audit from the Authority or Lead Agency. _______________________________________________________ _______________________________________________________

If No, give reasons why _______________________________________________________ _______________________________________________________ (Attach other information if necessary)

compliance monitoring programme and air quality management plans for the facility? _______________________________________________________ _______________________________________________________ (Attach other information if necessary)

_______________________________________________________ _______________________________________________________ _______________________________________________________ (Attach other information if necessary)

past, present and future facility operating conditions; _______________________________________________________ _______________________________________________________

(Attach other information if necessary)

continuous improvement. _______________________________________________________ _______________________________________________________

(Attach other information if necessary)

_______________________________________________________ _______________________________________________________

a copy of the current licence (if application is for renewal) _______________________________________________________ _______________________________________________________

environmental and social impact assessment, where applicable.

conditions of a licence to be renewed including where applicable, a summary of the most recent environmental compliance audit report and where available, the response of the Authority to the audit report (if application is for renewal).

a copy of the most recent annual emissions report (if application is for renewal)

and measures applied before including the best available technology and best environment management practices (if the application is for renewal). _______________________________________________________ _______________________________________________________

I declare that the information stated in this application is correct true and correct to the best of my knowledge.

Signature: ____________________________________________________

Name of applicant______________________________________________

Designation and title of applicant___________________________________

Contact information (phone number, e-mail and other) ____________________________________________________________ ____________________________________________________________

Date: ___________________________________________

Note:

an application for renewal of a licence within sixty days prior to the expiry of the current licence

where the Authority rejects the application for renewal of the licence, with reasons for the rejection.

is approved, a new licence shall be issued

application is false, misleading, wrong or incomplete, it may lead to rejection of the application or suspension, withdrawal, amendment or cancellation of the licence, if granted.

triplicate, upon payment of the prescribed fees.

____________________________________________________________ (For Official Use Only)

Comments of the lead agency (attach additional comment as necessary) ____________________________________________________________ ____________________________________________________________ ____________________________________________________________

Where applicable, comments from the public (attach additional comments as necessary) ____________________________________________________________ ____________________________________________________________ ____________________________________________________________

Application received on a date______________________20____________

Fee paid Shs: ___________ (in words) ______________________________

Inspection by the technical committee on control of pollution ____________________________________________________________ ____________________________________________________________ ____________________________________________________________

Comments of the Committee (attach additional comment as necessary) ____________________________________________________________ ____________________________________________________________ ____________________________________________________________

Decision of Committee ____________________________________________________________ ____________________________________________________________

_________________________ ______________________________ Chairperson, Technical Committee on Date Pollution Control.

Date when decision was communicated to applicant (attach communication to this form)

FORM 2

Regulation 46(3)

AIR POLLUTION CONTROL LICENCE.

Application reference: _______________________

Licence No: PC/AIR: ________________________

Name of facility: ____________________________________________________________ ____________________________________________________________

Address: ____________________________________________________________ ____________________________________________________________

Location of facility ____________________________________________________________ ____________________________________________________________ (Include GPS coordinates, block and plot number/village/parish/ward/subcounty/division/county/district and size of plot).

Brief description of facility ____________________________________________________________ ____________________________________________________________ (Describe type of facility)

This licence is valid from _________20_______ to __________20________

This licence is granted subject to the following conditions:

_______________________________________________________ _______________________________________________________

_______________________________________________________ _______________________________________________________

if the permitted emission limits are being exceeded. _______________________________________________________ _______________________________________________________

_______________________________________________________ _______________________________________________________

air quality management plans _______________________________________________________ _______________________________________________________

environment _______________________________________________________ _______________________________________________________

Date: ______________________________________

Signature: ___________________________________

………………………………………………………… Chairperson, Technical Committee on Pollution Control, National Environment Management Authority.

SCHEDULE 10

Regulations 42(2), 50(2), 52(3).

FEES

Application for licence/renewal/ variation/transfer of licence - Ushs. 100,000/=

Licence fee - Ushs. 200,000/=

Inspection of records/database - Ushs. 50,000/=

Cross Reference

Constitution Access to Information Act, 2005, Act 6 of 2005 National Climate Change Act, 2021, Act 22 of 2021 National Environment (Audit) Regulations, 2020, S.I 47 of 2020 National Environment (Environmental and Social Assessment) Regulations, 2020, S.I. 143 of 2020 National Environment (Management of Ozone Depleting Substances and Products) Regulations, 2020, S.I. 48 of 2020 Occupational Safety and Health Act, 2006, Act 9 of 2006 Petroleum Supply Act, 2003, Act 13 of 2003 Public Health Act, Cap. 281 Traffic and Road Safety Act, 1998, Cap. 361

HON. SAM CHEPTORIS, Minister of Water and Environment.