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

Extent: E+W+S

(a)The extraction or recovery from any material—
(i)by chemical means or the use of heat of any non-ferrous metal or alloy of non-ferrous metal or any compound of a non-ferrous metal; or
(ii)by electrolytic means, of aluminium,
if the process may result in the release into the air of particulate matter or any metal, metalloid or any metal or metalloid compound or in the release into water of a substance described in Schedule 5 and does not fall within paragraph (b) of Part B of this Section.
In this paragraph “material” includes ores, scrap and other waste.
(b)The mining of zinc or tin where the process may result in the release into water of cadmium or any compound of cadmium.
(c)The refining of any non-ferrous metal (other than the electrolytic refining of copper) or non-ferrous metal alloy except where the process is related to a process falling within a description in paragraph (a), (c) or (d) of Part B of this Section.
(d)Any process other than a process described in paragraph (b), (c) or (d) of Part B of this Section for making or melting any non-ferrous metal or non-ferrous metal alloy in a furnace, bath or other holding vessel if the furnace, bath or vessel employed has a designed holding capacity of 5 tonnes or more.
(e) Any process for producing, melting or recovering by chemical means or by the use of heat lead or any lead alloy, if—
(i)the process may result in the release into the air of particulate matter or smoke which contains lead; and
(ii)in the case of lead alloy, the percentage by weight of lead in the alloy in molten form exceeds 23% if the alloy contains copper and 2% in other cases.
(ee)Any process for ... recovering any of the elements listed below if the process may result in the release into the air of particulate matter or smoke which contains any of those elements—
gallium
indium
palladium
tellurium
thallium.
(f) Any process for producing, melting or recovering (whether by chemical means or by electrolysis or by the use of heat) cadmium or mercury or any alloy containing more than 0.05 per cent by weight of either of those metals or of both of those metals in aggregate.
(g)Any manufacturing or repairing process involving the manufacture or use of beryllium or selenium or an alloy of one or both of those metals if the process may occasion the release into the air of any substance described in Schedule 4 ; but a process does not fall within this paragraph by reason solely of its involving the melting of an alloy of beryllium if that alloy contains less than 0.1 per cent by weight of beryllium in molten form and the process falls within a description in paragraph (a) or (d) of Part B of this Section.
(h)The heating in a furnace or other appliance of any non-ferrous metal or non-ferrous metal alloy for the purpose of removing grease, oil or any other non-metallic contaminant (including such operations as the removal by heat of plastic or rubber covering from scrap cable), if related to another process described in this Part of this Section.
(i)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.
(j)...
(k) Pelletising, calcining, roasting or sintering any non-ferrous metal ore or any mixture of such ore and other materials.

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