Tần suất quan trắc môi trường nước mặt lục địa được quy định như sau: - Tần suất quan trắc nền: tối thiểu 01 lần/tháng; - Tần suất quan trắc tác động: tối thiểu 01 lần/quý.
The frequency of surface water environmental monitoring were defined as follows:-Frequency background monitoring: a minimum of 12 times per month;-The frequency of observation impact: a minimum of 12 times per quarter.
Environmental monitoring frequency continental surface water is defined as follows: - The frequency of observation platform: at least 01 times / month; - Frequency of impact monitoring: at least 01 times / quarter.