Sch 2 para 6 Landfill sites
Paragraph 5 does not apply to— (a) a site used for the storage of metallic mercury pursuant to Article 13(1) of Regulation (EU) 2017/852 of the European Parliament and of the Council on mercury, and repealing Regulation (EC) No 1102/2008 , as amended from time to time ; (b) onshore underground gas storage in natural strata, aquifers, salt cavities and disused mines; (c) chemical and thermal processing operations and storage related to those operations; or (d) operational tailings disposal facilities, including tailing ponds or dams, containing a hazardous substance.