Air Quality, Industrial Standards for Inorganic Substances (TCVN 5939, 1995)
Back to : Index
: Environmental Law (ASEAN-10) : Vietnam
: Implementing Regulations
Disclaimer
1. ScopeAIR QUALITY:
INDUSTRIAL EMISSION STANDARDS
INORGANIC SUBSTANCES AND DUSTS
TCVN 5939-1995
1.1 This standard specifies the maximum allowable concentration (in mg/m3 of emission gas) of inorganic substances and dusts in industrial emission gases emitted into the ambient air.
In this standard, Industrial emission gas means: smoke, gas, dust, or gases or smokes containing dusts, particulate or inorganic substances produced by sources of any industrial process, or by sources of any servicing and trading activity, or by other activities.
1.2 This standard is applied to control of concentrations of industrial emission gases before being emitted into atmosphere.
2. Limitation Values
2.1 Maximum concentration of the inorganic substances and dusts in industrial emission gases emitted by any source into atmosphere should be compliant with the values shown in the table 1.
2.2 The limit values of concentrations of inorganic substances, particulate and dusts specified in the column A are applied to the emission gases of existing sources, in column B are applied to all sources imposed from the date which stated by environmental authority.
2.3 The limit values of concentrations of substances and dusts in emission gases or smokes created by particular sources (e.g. cement production, oil refinery, vehicle exhaust, etc.) are specified in separate standards.
Table 1
Maximum Allowable Concentration (MAC)
of Smokes, Dusts and Inorganic Substances in the Industrial Emission Gases
| No | Parameter | MAC (mg/m3) | |
| A | B | ||
| 1 | Particulate in smoke of: | ||
| - heating of metals | 400 | 200 | |
| - asphalt concrete plant | 500 | 200 | |
| - cement plant | 400 | 100 | |
| - other sources | 600 | 400 | |
| 2 | Dust | ||
| - containing silica | 100 | 50 | |
| - containing asbestos | none | none | |
| 3 | Antimony | 40 | 25 |
| 4 | Arsenic | 30 | 10 |
| 5 | Cadmium | 20 | 1 |
| 6 | Lead | 30 | 10 |
| 7 | Copper | 150 | 20 |
| 8 | Zinc | 150 | 30 |
| 9 | Chloride | 250 | 20 |
| 10 | HCl | 500 | 200 |
| 11 | Fluoride, HF (any source) | 100 | 10 |
| 12 | H2S | 6 | 2 |
| 13 | CO | 1500 | 500 |
| 14 | SO2 | 1500 | 500 |
| 15 | NOx (any source) | 2500 | 1000 |
| 16 | NOx (acid manufacturing) | 4000 | 1000 |
| 17 | H2SO4 (any source) | 300 | 35 |
| 18 | HNO3 | 2000 | 70 |
| 19 | Ammonia | 300 | 100 |
Note: Standard analysis methods of concentrations of the parameters in the industrial emission gases are specified in current TCVNs.Top of Page
Disclaimer: APCEL has tried to ensure the accuracy, reliability and completeness of the information in this database; however, APCEL does not guarantee the accuracy, reliability or completeness of this information. If you encounter an error, please notify us by e-mail at lawapcel@nus.edu.sg.