Sampling and analysis of water samples in areas with hazardous minerals in Vietnam from January 27, 2025

Sampling and analysis of water samples in areas with hazardous minerals in Vietnam from January 27, 2025

Clause 7 Article 1 of Circular 30/2024/TT-BTNMT has replaced Article 13 of Circular 06/2015/TT-BTNMT with regulations on water sample collection and analysis in Vietnam. To be specific:

(1) For Group I Hazardous Minerals:

- Requirements for location and quantity of water samples:

+ Water samples in the investigation and assessment area are collected following the regulations in Article 5 of Circular 06/2015/TT-BTNMT.

+ The input and output water samples of the investigation and assessment area are collected at upstream and downstream locations. One sample is taken at each location.

- Sampling and preserving water samples: content and techniques are carried out according to TCVN:12295:2018 Environmental geological investigation and assessment - Sampling methods for measuring radioactivity on high-resolution gamma spectrometry;

- Water sample analysis: conducted according to TCVN 12296:2018 Environmental geological investigation and assessment - Methods for determining activity (226Ra, 232Th, 40K) on high-resolution gamma spectrometry.

(2) For Group II Hazardous Minerals:

- Requirements for location and quantity of water samples:

+ Input water samples are collected at the upstream position of the investigation and assessment area. Quantity: 01 sample;

+ Output water samples are collected at the downstream position of the investigation and assessment area. Quantity: 01 sample;

+ Water samples in the investigation and assessment area are collected following the regulations in Article 5 of Circular 06/2015/TT-BTNMT;

- Collecting and preserving water samples: content and techniques are performed according to TCVN 6663-1:2011 (ISO 5667-1:2006); Water quality - Sampling - Part 1: Guidance on the design of sampling programs and techniques; TCVN 6663-3:2016 ISO 5667-3:2011 Water quality - Sampling - Part 3: Preservation and handling of water samples; TCVN 6663-6:2018 ISO 5667-3:2011 Water quality - Sampling Part 6: Guidance for sampling rivers and streams;

- Water sample analysis: conducted according to QCVN 08:2023/BTNMT National technical regulation on surface water quality.

Refer to details in the Circular 30/2024/TT-BTNMT effective from January 27, 2025.

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