Division 5.5 Odour emissions United Kingdom Original text. Later amendments are not shown. The associated monitoring is in BAT 6. BAT 20In order to prevent or, where that is not practicable, to reduce odour emissions, BAT is to set up, implement and regularly review an odour management plan, as part of the environmental management system (see BAT 1), that includes all of the following elements: Applicability ← Division BAT 19 Division 5.5 Division BAT 20 →