# The Environmental Protection (Prescribed Processes and Substances) Regulations 1991, 

Extent: E+W+S

(a)The making or melting of any non-ferrous metal or non-ferrous metal alloy (other than tin or any alloy which, in molten form, contains 50% or more by weight of tin) in any furnace, bath or other holding vessel with a designed holding capacity of less than 5 tonnes (together with any incidental refining).
(b) The separation of copper, aluminium, magnesium or zinc from mixed scrap by differential melting.
(bb) The fusion of calcined bauxite for the production of artificial corundum.
(c)Melting zinc or a zinc alloy in conjunction with a galvanising process.
(d) Melting zinc, aluminium or magnesium or an alloy of one or more of these metals in conjunction with a die-casting process.
(e)Any such process as is described in paragraph (h) of Part A above, if not related to another process described in that Part ; but a process does not fall within this paragraph if—
(i)it involves the use of one or more furnaces or other appliances the primary combustion chambers of which have in aggregate a net rated thermal input of less than 0.2 megawatts; and
(ii)it does not involve the removal by heat of plastic or rubber covering from scrap cable or of any asbestos contaminant.
(f)Any foundry process (including ancillary foundry operations such as the manufacture and recovery of moulds, the reclamation of sand, fettling, grinding and shot-blasting) if related to another process described in this Part of this Section.
(g)...
The processes described in paragraphs (a), (c) and (d) above include any related process for the refining of any non-ferrous metal or non-ferrous metal alloy.

---
Source: https://www.legislation.gov.uk/uksi/1991/472/schedule/1/part/2/crossheading/section-22-nonferrous-metals-2 (the official version)
Page: https://openlegislation.uk/environmental-protection-prescribed-processes-and-substances-regulations-1991/schedule-1/part-2/crossheading-section-22-nonferrous-metals-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.