List of Vietnam Law
Circular No. 11/2015/TT-BTNMT dated March 31, 2015 of the Ministry of Natural Resources and Environment promulgating the national technical regulation on environment
Date: 3/31/2015
THE MINISTRY OF NATURAL RESOURCES AND ENVIRONMENT
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THE SOCIALIST REPUBLIC OF VIETNAM
Independence - Freedom - Happiness --------------- |
No. 11/2015/TT-BTNMT
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Hanoi, March 31, 2015
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PP. THE MINISTER
THE DEPUTY MINISTER (Signed and sealed) Bui Cach Tuyen (This translation is for reference only)
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No.
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Parameter
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Measurement unit
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Value C
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A
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B
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1
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pH
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-
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6 - 9
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6 - 9
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2
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BOD5 (20°C)
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mg/l
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30
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50
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3
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COD
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New facility
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mg/l
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75
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200
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Existing facility
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mg/l
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100
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250
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4
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Total suspended solid (TSS)
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mg/l
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50
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100
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5
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Total Nitrogen
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New facility
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mg/l
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40
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60
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Existing facility
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mg/l
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50
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80
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6
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Ammonium
(NH4+ based on N)
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New facility
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mg/l
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10
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40
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Existing facility
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mg/l
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15
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60
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The flow of the receiving water (Q)
Measurement unit: cubic meter/second (m3/s)
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Coefficient Kq
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Q ≤ 50
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0.9
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50 < Q ≤ 200
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1
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200 < Q ≤ 500
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1.1
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Q > 500
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1.2
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The volume of the receiving water (V)
Measurement unit: cubic meter (m3)
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Coefficient Kq
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V ≤ 10 x 106
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0.6
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10 x 106 < V ≤ 100 x 106
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0.8
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V > 100 x 106
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1.0
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Discharge flow (F)
Measurement unit: cubic meter/day and night (m3/24h)
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Coefficient Kf
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F ≤ 50
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1.2
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50 < F ≤ 500
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1.1
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500 < F ≤ 5.000
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1.0
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F > 5.000
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0.9
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No.
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Parameter
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Examination method and calibration code
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1
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Sampling
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- TCVN 6663-1:2011 (ISO 5667-1:2006) – Water quality – Part 1: Guidance on the design of sampling programmes and sampling techniques;
- TCVN 6663-3:2008 (ISO 5667-3: 2003) – Water quality – Sampling. Guidance on the preservation and handling of water samples;
- TCVN 5999:1995 (ISO 5667-10: 1992) – Water quality – Sampling. Guidance on the wastewater sampling.
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2
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pH
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- TCVN 6492:2011 (ISO 10523:2008) – Water quality – pH determination;
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3
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BOD5 (20°C)
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- TCVN 6001-1:2008 (ISO 5815-1:2003), Water quality - Determination of biochemical oxygen demand after n days (BODn) - Part 1: Dilution and seeding method with allylthiourea addition;
- TCVN 6001-2:2008 (ISO 5815-2:2003), Water quality - Determination of biochemical oxygen demand after n days (BODn) - Part 2: Method for undiluted samples;
- SMEWW 5210 B - Standard methods for the examination of water and wastewater – BOD determination.
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4
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COD
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- TCVN 6491:1999 (ISO 6060:1989), Water quality – Determination of chemical oxygen demand (COD);
- SMEWW 5220 - Standard methods for the examination of water and wastewater – COD determination
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5
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Total suspended solid (TSS)
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- TCVN 6625:2000 (ISO 11923:1997), Water quality – Determination of total suspended solid through glass fibre filtration;
- SMEWW 2540 - Standard methods for the examination of water and wastewater – TSS determination.
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6
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Total Nitrogen (N)
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- TCVN 6638:2000 Water quality - Determination of nitrogen - Catalytic digestion after reduction with Devarda's alloy;
- SMEWW 4500-N.C - Standard methods for the examination of water and wastewater – Nitrogen determination
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7
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Ammonium (NH4+)
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- TCVN 6179-2:1996 (ISO 7150-2:1986) – Water quality –Ammonium determination. Part 2: Automatic spectrometric method
- TCVN 6179-1:1996 (ISO 7150-1:1986) – Water quality –Ammonium determination. Part 2: Manual spectrometric method
- TCVN 5988:1995 (ISO 5664:1984) – Water quality –Ammonium determination. Distillation and titration method.
- SMEWW 4500-NH3- Standard methods for the examination of water and wastewater – Nitrogen determination
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