Sustainable Development Report 2019

Maintaining the rational withdrawal, use, consumption and discharge of water is a key challenge for the Company, which is a major user of seawater and a consumer of ground water in specific sectors and areas of activity. Major risks [GRI 102-15] Risk Management / Control Practices [GRI 103-2a] • The potential reduction of aquifer reserves (ground water) which the Company uses for its production activities as well as for covering the water supply needs of its local communities' settlements. This potential risk may result in the reduction or suspension of production, in complaints from the local commu- nities and in increased operating costs through the use of water supplied by public utilities as an alternative source. • An additional potential risk concerns possible future changes in the water withdrawal limits and water discharge parameters provided for in the Environmental Terms Approval Decisions of the Company's industrial plants, in particular in the Metallurgy and Electricity sectors, which may result in increased capital costs and in operational maintenance costs associated with the development of alternative water reserves. • The use of water in all the Company's activities complies entirely with the Environmental Terms Approval Decisions of all its industrial plants. • Water withdrawals from ground water in the Metallurgy sector are obtained from a controlled network of low-depth wells (boreholes) which allows water to be replenished natu- rally after withdrawal (renewable sources) . A special study carried out by the Company in 2019 regarding the manage- ment of water withdrawals from the network of boreholes in relation to the total capacity of the wider area's aquifer, showed that the average quantity of water entering the aquifer on an annual basis (rainfalls, snowfalls etc.) reaches 83.3 million m3. According to the water use permit issued, the Company has the right to withdraw 6.75% of this total quantity, however its actual withdrawal rate is even lower, standing at approx- imately 6% and ensuring the preservation of the water level in the aquifer and consequently in the boreholes, something that is also confirmed by the regular checks of the water level at all the wells . • Water recycling and reuse programs are implemented to the maximum extent possible in the Metallurgy sector's production processes or secondary uses, together with rainwater collection and utilization practices. • Water consumption targets are set on an annual basis for each production sector. • As regards the management of the liquid waste and water discharges resulting from MYTILINEOS' activity, this is fully Water management Materiality assessment process results. Scale: [0—4] where 0 “Not significant” and 4 “Very significant” Impact on Sustainable Development 3,70 Significance for Stakeholders 3,44 Management Approach [GRI 102-11] [GRI 103-2c] The purpose of this disclosure is to provide information and data to MYTILINEOS' Social Partners, so that they can understand how the Company is managing water resources, seeking to maximize the overall social and environmental benefits of its business activity. Meeting the water supply needs of the industrial units of the Company's Metallurgy and Electric Power sectors, as well as the water supply needs of its local communities in the region of Viotia, require the extraction and use of significant quantities of water. Recognizing the importance of this natural resource, the Company takes initiatives to ensure the efficient use of water, the conservation of the water resources used and the responsible management of water discharges. [GRI 103-2b] controlled and takes place in accordance with the parameters determined by the environmental terms and regulations under which the facilities of the company's Business Activity Sectors have obtained their environmental licenses. In the Metallurgy sector, which produces that largest quantity of liquid waste, the largest part of this waste is recycled within the production process itself. • To identify and assess the likelihood of future regulatory changes affecting sustainability issues, including water, the Company communicates regularly with the competent authori- ties and with the regulatory bodies involved. • Aiming to constantly improve and enrich its practices in this area, the Company participates voluntarily since 2016 in the CDP – Water Security global sustainable development initia- tive, by disclosing comprehensive data about its practices in the management of water resources and having its impact and per- formance compared to those of the largest companies globally. • The environmental officers in each one of the Company's Business Activity Sectors ensure that the progress made towards the targets set is monitored and that water resources are managed responsibly in the context of the activities of all the Company's industrial plants. Boundaries of the Material Issue [GRI 102-46] [GRI 103-1b] Issue of increased significance to: Where the impacts occur: The impacts take place in the areas (e.g. Corinthian gulf) of the industrial units, across all its business sectors and the subsidiaries of MYTILINEOS. The management of the topic by MYTILINEOS contributes to the Sustainable Development: • Customers • Local communities • Regulatory bodies • Academic community in the context of their cooperation with MYTILINEOS. • Access to safe, accessible drinking water and sanitation facilities for workers and local settlements. • In the efficiency of water use and in ensuring its sustainable pumping in the context of industrial activity. • Encourage the participation of local communities in improving water management. By whomare the impacts caused: The impacts are caused by the Metallurgy and Electric Power sectors of MYTILINEOS, while the Company's subsidiaries DELPHI-DISTOMON and EPALME, as well as the local settlements adjacent to the Aluminium plant, may also be indirectly involved. Key Challenges / Impacts [GRI 103-1a] [GRI 102-15] 79 78

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