Division 1.1.9.1 Solvent mass balance United Kingdom Original text. Later amendments are not shown. BAT 10BAT is to monitor total and fugitive VOC emissions by compiling, at least once every year, a solvent mass balance of the solvent inputs and outputs of the plant, as defined in Part 7(2) of Annex VII to Directive 2010/75/EU and to minimise the uncertainty of the solvent mass balance data by using all of the techniques given below. ← Division 1.1.9 Division 1.1.9.1 Division BAT 10 →