This information sheet includes information on how surface engineering sites holding very toxic, environmentally dangerous and toxic substances come into the scope of the COMAH regulations. It also describes: how some sites may have been brought into COMAH as a result of CHIP3; COMAH application rules specifically for surface engineering sites; substances in plating bath mixtures; the main COMAH duties in outline; the timescales involved; and what action needs to be taken by those affected.

