National Environmental Management: Air Quality Act, 2004 (Act No. 39 of 2004)NoticesList of Activities which result in atmospheric emissions which have or may have a significant deterimental effect on the environment, including health, social conditions, economic conditions, ecological conditions or cultural heritageCategory 3: Carbonization and Coal Gasification |
Category 3: Carbonization and Coal Gasification
| (1) | Subcategory 3.1: Combustion Installations |
Description: |
Combustion installations used primarily for steam raising or electricity generation (furnaces and heaters). |
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Application: |
All refinery furnaces and heaters. |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 10% O2, 273 Kelvin and 101.3kPa. |
|
Common name |
Chemical symbol |
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Particulate matter |
N/A |
New |
50 |
Existing |
100 |
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Oxides of nitrogen |
NOx expressed as NO2 |
New |
700 |
Existing |
2000 |
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Total volatile organic compounds (from non-coke oven operations) |
N/A |
New |
40 |
Existing |
90 |
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(a) The following special arrangements shall apply—
| (i) | Sulphur-containing compounds to be recovered from gases to be used for combustion with a recovery efficiency of not less than 90% or remaining content of inorganic sulphur-containing compounds to be less than 1000 mg/Nm3 measured as hydrogen sulphide, whichever is strictest. |
| (ii) | Where co-feeding with waste materials with calorific value allowed in terms of the Waste Disposal Standards published in terms of the Waste Act, 2008 (Act No.59 of 2008) occurs, additional requirements under subcategory 1.6 shall apply. |
| (iii) | Additional requirements under subcategory 1.6 shall continue to apply even after the waste ceases to be waste in terms of section 1 of the National Environmental Management: Waste Act, 2008 (Act No. 59 of 2008), as amended by the National Environmental Management: Waste Amendment Act, 2014 (Act No. 26 of 2014). |
[Category 3(1)(3.1)(a)(iii) inserted by section 3(a) of Notice No. 551, GG38863, dated 12 June 2015]
| (2) | Subcategory 3.2: Coke Production |
Description: |
Coke production and by-product recovery. |
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Application: |
All installations |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 273 Kelvin and 101.3kPa. |
|
Common name |
Chemical symbol |
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Hydrogen sulphide |
H2S |
New |
7(i) |
Existing |
10(i) |
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Notes: |
(i) from point source |
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| (3) | Subcategory 3.3: Tar Processes |
Description: |
Processes in which tar, creosote or any other product of distillation of tar is distilled or is heated in any manufacturing process. |
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Application: |
All installations |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 10% O2, 273 Kelvin and 101.3kPa. |
|
Common name |
Chemical symbol |
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Total Volatile Organic Compounds |
N/A |
New |
130 |
Existing |
250 |
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| (a) | The following transitional arrangement shall apply for the storage and handling of raw materials, intermediate and final products with a vapour pressure greater than 14kPa at operating temperature:— |
Leak detection and repair (LDAR) program approved by licensing authority to be instituted, by 01 January 2014.
| (b) | The following special arrangements shall apply for control of TVOCs from storage of raw materials, intermediate and final products with a vapour pressure of up to 14kPa at operating temperature, except during loading and offloading. (Alternative control measures that can achieve the same or better results may be used)— |
| (i) | Storage vessels for liquids shall be of the following type: |
Application |
All permanent immobile liquid storage facilities at a single site with a combined storage capacity of greater than 1000 cubic meters. |
True vapour pressure of contents at product storage temperature |
Type of tank or vessel |
Type 1: Up to 14 kPa |
Fixed-roof tank vented to atmosphere, or as per Type 2 and 3 |
Type 2: Above 14 kPa and up to 91 kPa with a throughput of less than 50'000 m3 per annum |
Fixed-roof tank with Pressure Vacuum Vents fitted as a minimum, to prevent "breathing" losses, or as per Type 3 |
Type 3: Above 14 kPa and up to 91 kPa with a throughput greater than 50'000 m3 per annum |
(g) External floating-roof tank with primary rim seal and secondary rim seal for tank with a diameter greater than 20m, or (h) fixed roof-tank with internal floating deck/roof fitted with primary seal, or (i) fixed roof-tank with vapour recovery system. |
Type 4: Above 91 kPa |
Pressure vessel |
| (ii) | The roof legs, slotted pipes and/or dipping well on floating roof tanks (except for domed floating roof tanks or internal floating roof tanks) shall have sleeves fitted to minimise emissions. |
| (iii) | Relief valves on pressurised storage should undergo periodic checks for internal leaks. This can be carried out using portable acoustic monitors or if venting to atmosphere with an accessible open end, tested with a hydrocarbon analyser as part of an LDAR programme. |
| (c) | The following special arrangements shall apply for control of TVOCs from the loading and unloading (excluding ships) of raw materials, intermediate and final products with a vapour pressure of greater than 14kPa at handling temperature. Alternative control measures that can achieve the same or better results may be used: |
| (i) | All installations with a throughput of greater than 50'000 m3 per annum of products with a vapour pressure greater than 14 kPa, must be fitted with vapour recovery/destruction units. Emission limits are set out in the table below— |
Description: |
Vapour Recovery Units |
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Application: |
All loading/offloading facilities with a throughput greater than 50 000 m3 |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 273 Kelvin and 101.3kPa. |
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Common name |
Chemical symbol |
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Total volatile organic compounds from vapour recovery/destruction units using thermal treatment. |
N/A |
New |
150 |
Existing |
150 |
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Total volatile organic compounds from vapour recovery/destruction units using non-thermal treatment. |
N/A |
New |
40 000 |
Existing |
40 000 |
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| (ii) | For road tanker and rail car loading/offloading facilities where the throughput is less than 50'000 m3 per annum, and where ambient air quality is, or is likely to be impacted, all liquid products shall be loaded using bottom loading, or equivalent, with the venting pipe connected to a vapour balancing system. Where vapour balancing and/or bottom loading is not possible, a recovery system utilizing adsorption, absorption, condensation or incineration of the remaining VOC's, with a collection efficiency of at least 95%, shall be fitted. |
| (4) | Subcategory 3.4: Char, Charcoal and Carbon Black Production |
Description: |
Production of char, charcoal and the production and use of carbon black. |
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|---|---|---|---|
Application: |
All installations producing more than 20 tons of char and charcoal per month. All installations consuming more than 20 tons per month of carbon black in any processes. |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 273 Kelvin and 101.3kPa. |
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Common name |
Chemical symbol |
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Particulate matter |
N/A |
New |
50 |
Existing |
100 |
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Poly Aromatic Hydrocarbons |
PAH |
New |
0.1 |
Existing |
0.5 |
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[Category 3(4)(3.4) substituted by section 3(b) of Notice No. 551, GG38863, dated 12 June 2015]
| (5) | Subcategory 3.5: Electrode Paste Production |
Description: |
Electrode paste production. |
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|---|---|---|---|
Application: |
All installations. |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 273 Kelvin and 101.3kPa. |
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Common name |
Chemical symbol |
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Particulate matter |
N/A |
New |
50 |
Existing |
100 |
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| (6) | Subcategory 3.6: Synthetic Gas Production and Cleanup |
Description: |
The production and clean-up of a gaseous stream derived from coal gasification and includes gasification, separation and clean up of a raw gas stream through a process that involves sulphur removal and Rectisol as well as the stripping of a liquid tar stream derived from the gasification process. |
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|---|---|---|---|
Application: |
All installations. |
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Substance or mixture of substances |
Plant status |
mg/Nm3 under normal conditions of 273 Kelvin and 101.3kPa. |
|
Common name |
Chemical symbol |
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Hydrogen Sulphide |
H2S |
New |
3 500 |
Existing |
4 200 |
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Total Volatile Organic Compounds |
N/A |
New |
130 |
Existing |
250 |
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Sulphur dioxide |
SO2 |
New |
500 |
Existing |
3500 |
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