Quy trình lấy mẫu được tiến hành theo các quy định của Tiêu chuẩn Việt Nam hoặc Tiêu chuẩn Quốc Tế (theo Standard Methods for the Exammination of Water and Wastewater, 2005).
The process of sampling is conducted according to the regulations of the Vietnam standards or International standards (according to the Standard Methods for the Exammination of Water and Wastewater, 2005).
The process of sampling is conducted under the provisions of the Vietnam Standards or International Standards (according to Standard Methods for the Exammination of Water and Wastewater, 2005).