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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 Foreword 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/TTBTNMT dated October 07, 2009 issued by Ministry of Natural Resources and Environment NATIONAL TECHNICAL REGULATION ON HAZARDOUS SUBSTANCES IN AMBIENT AIR 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 1.2.2 8-hour average: means the arithmetic average of the values measured over a period of 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 TECHNICAL RETUTATION Maximum allowable concentration of harmful substances in ambient air is specified in Table Table 1: Maximum allowable concentration of harmful substances in ambient air Unit: Microgam per cubic meter (μg/m3) No Parameter Chemical formula Average time Allowed concentration hour 0,03 Year 0,005 hour 0,3 Year 0,05 Inorganic substances Arsenic (composite, As) Arsenic hydride (Asin) As AsH3 Hydrochloric acid HCl 24 hour 60 Nitric acid HNO3 hour 400 Sulfuric acid H2SO4 Chrysotile asbestoscontaining dust Mg3Si2O3(OH) Cadmium (including oxides and metal fumes according Cd) Cd 10 11 Chromium VI (compounds, as Cr) Hydrogen floride Cr+6 HF 24 hour 150 hour 300 24 hour 50 Year hour 150 24 hour - 50 - sợi/m3 hour 0,4 hour 0,2 Year 0,005 hour 100 24 hour 30 hour 0,007 24 hour 0,003 Year 0,002 hour 20 24 hour Year 12 Hydrocyanua HCN hour 10 13 Manganese and compounds (as MnO2) Mn/MnO2 hour 10 24 hour Year 0,15 14 Nickel (metals and compounds, as Ni) Ni 24 hour 15 Mercury (metals and compounds, as Hg) Hg 24 hour 0,3 Organic substances 16 Acrolein CH2=CHCHO hour 50 17 Acrylonitrile CH2=CHCN 24 hour 45 Year 22,5 hour 50 24 hour 30 Year 54 hour 22 18 Aniline C6H5NH2 19 Acrylic acid C2H3COOH 20 Benzene C6H6 Year 10 21 Benzidine NH2C6H4C6H4NH2 hour NDT 22 Cloroform CHCl3 24 hour 16 Year 0,04 hour 5000 24 hour 1500 23 Hydrocabon CnHm 24 Formaldehyde HCHO hour 20 25 Naphthalene C10H8 hour 500 24 hour 120 26 Phenol C6H5OH hour 10 27 Tetracloetylen C2Cl4 24 hour 100 28 Vinyl chloride CICH=CH2 24 hour 26 The unpleasant odors 29 Ammonia NH3 hour 200 30 Acetaldehyde CH3CHO hour 45 Year 30 31 Propionic acid CH3CH2COOH hour 300 32 Hydrosunfua H2S hour 42 33 Methyl mecarptan CH3SH hour 50 24 hour 20 24 hour 260 Year 190 One time maximum 1000 hour 500 Year 190 hour 1000 34 35 36 Styrene Toluen Xylene C6H5CH=CH2 C6H5CH3 C6H4(CH3)2 Remark: NDT: Not detected 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 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