Division I.1 Derivation of numerical MRLs United Kingdom Original text. Later amendments are not shown. I.1.1Division I.1.1 I.1.2Division I.1.2 I.1.3Division I.1.3 I.1.4Division I.1.4 I.1.5Division I.1.5 ← Division I Division I.1 Division I.1.1 →