QCVN 06 : 2009BTNMT National technical regulation on hazardous substances in ambient air

QCVN 06 : 2009BTNMT National technical regulation on hazardous substances in ambient air QCVN 06 : 2009BTNMT Quy chuẩn kỹ thuật quốc gia về một số chất độc hại trong không khí xung quanh QCVN 06:2009BTNMT was complied by Drafting Committee of national technical regulations on air quality; submited by Vietnam Enviroment Administration, Department of Science Technology, Department of Legal Affairs and promulgated in line with Circular No. 162009TTBTNMT dated October 07, 2009 issued by Ministry of Natural Resources and Environment

SOCIALIST REPUBLIC OF VIETNAM

QCVN 06 : 2009/BTNMT

National technical regulation on hazardous substances in ambient air

HÀ NỘI - 2009

QCVN 06:2009/BTNMT was complied by Drafting Committee of national technical regulations

on air quality; submited by Vietnam Enviroment Administration, Department of Science & Technology, Department of Legal Affairs and promulgated in line with Circular No 16/2009/TT-BTNMT dated October 07, 2009 issued by Ministry of Natural Resources and Environment

NATIONAL TECHNICAL REGULATION ON HAZARDOUS SUBSTANCES IN

AMBIENT AIR

1 General Provision

1.1 Scope of Retutaion

1.1.1 This regulation deals with maximum allowable concentration of harmful substances in ambient air

1.1.2 This Regulation applies to assessment of ambient air quality and monitoring of air pollution

1.1.3 T his Regulation does not apply to air within manufacturing facilities and indoor air

1.2 Interpretation of terms

In this Regulation, the terms below are construed as follows:

1.2.1 An hour average: means the arithmetic average of the values measured in a period

of one hour for the measurements made more than once in an hour, or the value of measurements made once in a period of one hour The average value is measured several times in 24 hours (a day) under a certain frequency The largest average value within the measured values obtained in 24 hours is taken to compare with limited values specified in Table 1

1.2.2 8-hour average: means the arithmetic average of the values measured over a period

of 8 consecutive hours

1.2.3 24-hour average means the arithmetic average of the values measured over a period

of (a day)

1.2.4 Annual average: means the arithmetic average of the average value of 24 hours measured over a period of one year

2 TECHNICAL RETUTATION

Maximum allowable concentration of harmful substances in ambient air is specified in Table 1

Table 1: Maximum allowable concentration of harmful substances in ambient air

Unit: Microgam per cubic meter (μg/m 3 )

Inorganic substances

24 hour 150

7 Chrysotile

asbestos-containing dust

Mg3Si2O3(OH) - 1 sợi/m3

8 Cadmium (including

oxides and metal fumes -

according Cd)

10 Chromium VI

(compounds, as Cr) Cr

13 Manganese and

compounds (as MnO2) Mn/MnO2 24 hour1 hour 108

14 Nickel (metals and

compounds, as Ni)

15 Mercury (metals and

compounds, as Hg)

Organic substances

Year 10

21 Benzidine NH2C6H4C6H4NH2 1 hour NDT

The unpleasant odors

maximum

1000

Remark: NDT: Not detected

3 DETERMINING METHOD

The method for determination of air quality parameters shall comply with guidance of national standards or corresponding analytical standards of international organizations

- TCVN 5969:1995 (ISO 4220:1983) Ambient air – Determination of a gaseous acid air pollution index – Titrimetric method with indicator or potentionmetric end-point detection

- TCVN 6502:1999 (ISO 10312:1995) Ambient air - Determination of asbestos fibres - Direct - transfer transmission electron microscopy method

The parameters specified in this Regulation not having national standards guiding the analytical method shall apply the corresponding analytical standards of the international organizations

4 IMPLEMENTATION

This regulation replaces TCVN 5938:2005/BTNMT – Air quality - Maximum permissible concentration of hazardous substances in ambient air which was promulgated

in line with Decision No 22/2006/QD-BTNMT dated December 18, 2006 issued by Ministry of Natural Resources and Environment

In case the national or internaltional standards referred in this Regulation amended and supplemented or superseded shall be applied under new documents