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Air Quality, Industrial Standards for Inorganic Substances (TCVN 5939, 1995)

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AIR QUALITY:
INDUSTRIAL EMISSION STANDARDS
INORGANIC SUBSTANCES AND DUSTS
TCVN 5939-1995

1. Scope

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

N^o	Parameter	MAC (mg/m³)
N^o	Parameter	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.

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Acknowledgement: Text courtesy of NEA Policy Division, MOSTE.

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.

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