Antofagasta Results Presentation Deck slide image

Antofagasta Results Presentation Deck

Global Industry Standard on Tailings Management¹ On track to meet disclosure requirements PUBLICATION: AUGUST 2020 Standard developed and published, covering 77 requirements integrating social, environmental, local economic and technical considerations. +3 YEARS: AUGUST 2023 Deadline for companies with tailings facilities with elevated risk (3 years from Standard's publication). Applies to: El Mauro (Los Pelambres). Centinela published in 2023, two years ahead of deadline. +5 YEARS: AUGUST 2025 ● ● ● ● ● TIMELINE: DEVELOPMENT OF GISTM ● Deadline for all other remaining facilities to conform to Standard. Applies to: Los Quillayes (Los Pelambres) and Zaldívar (x1 facility). 1 Global Industry Standard on Tailings Management abbreviated to GISTM. GISTM: INDUSTRY BEST PRACTICE Standard developed by the International Council on Mining and Metals ("ICMM"), the United Nations Environment Programme ("UNEP") and Principles for Responsible Investment ("PRI"). As part of risk monitoring process, the Company has an Independent Tailings Review Committee that reports to the Board of Directors. ● 27 July 2023: ICCM provides status update on members' progress. CONFORMANCE TO INDUSTRY STANDARD Documentation for El Mauro published in line with target date as set by Standard. ANTOFAGASTA PLC ● Documentation also now published for Centinela, two years ahead of deadline. Published documentation includes dam safety reviews, risk assessments, emergency response plans and emergency simulations. Antofagasta plc | 2023 Half Year Results 20
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