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Pollutant (Stock Pollutant (Characteristics (persistent pollutants, most…

- - - - Monitoring the ambient condition of watercourse
        
        dissolved oxygen (DO)
        
        can be used to implement an ambient permit system or ambient emission charge
        
        bio-chemical oxygen demand (BOD)
      - Monitoring the magnitude of emissions
    - - heavy pollutant load can cause river to become anaerobic
      - require tremendous amount of oxygen for bacterial activities