This unit describes the skills and knowledge required to develop processes and procedures for controlling hazardous chemicals in the workplace, and then monitoring their effectiveness. The unit requires the application of knowledge associated with work health and safety (WHS) legislation, and organisational policies and procedures relating to controlling hazardous chemicals.The unit applies to those who work under supervision and use some discretion and judgement to respond to monitoring hazardous chemicals in the workplace. It applies to hazardous chemicals with the potential to harm human health, which may be solids, liquids or gases - pure substances or mixtures. When used in the workplace these substances often generate vapours, fumes, dusts and/or mists.NOTES1. The terms ‘occupational health and safety’ (OHS) and ‘work health and safety’ (WHS) are equivalent, and generally either can be used in the workplace. In jurisdictions where model WHS laws have not been implemented, registered training organisations (RTOs) are advised to contextualise this unit of competency by referring to existing WHS legislative requirements.2. The model WHS laws include the model WHS Act, model WHS Regulations and model WHS Codes of Practice. See Safe Work Australia for further information.3. For the purposes of this unit of competency ‘safe systems of work’ refers to a formal procedure that results from systematic examination of a task in order to identify all the hazards. It defines safe methods to ensure that hazards are eliminated or, where this is not possible, risks are minimised.No licensing, legislative or certification requirements apply to this unit at the time of publication.