Sustainable Development Report 2019

The collection, management and reduction of waste are key elements of MYTILINEOS' environmental policy. Waste (bauxite residues) generated as a result of the production process in the Metallurgy sector accounts for the largest volume of the Company's solid waste. A key challenge for MYTILINEOS is to improve in this area, which depends to a large extent on the utilization of this waste either by itself, through its participation in European pilot programs or by making it available for the production of other industrial materials. Until its final disposal, this particular type of waste is accumulated in a specific desig- nated area which, for the purposes of measuring MYTILINEOS' environmental footprint, is considered as a Controlled Landfill for Non-Hazardous Waste operating in accordance with the licens- ing acts of the Sterea Regional Administration and the Viotia Prefectural Administration. Additional permanent challenges for the Company in this area are (a) the management of all hazardous and non-hazardous waste, placing emphasis on reuse and recycling methods and, in the particular case of bauxite residues, on utilization methods, and (b) the reduction of the amount of waste to be landfilled, thus helping minimize the impact on the environment and on human health while also reducing operating costs. Major risks [GRI 102-15] Risk Management / Control Practices [GRI 103-2a] The gradual reduction of available bauxite disposal sites consti- tutes a key environmental risk for the MYTILINEOS' Metallurgy sector, with possible negative effects on the Company's finan- cial performance. • The management and reduction of waste are key elements of the Company's environmental policy. A network for the collec- tion of waste for reuse and recycling has been designed and is in operation in every production facility. • In cases where recycling cannot be completed on-site (i.e. in the Company's facilities), waste is disposed of through the Company's cooperation with alternative waste management systems organizations which have the statutory approvals of the Hellenic Recycling Agency, as well as with licensed (per waste category) waste collection, transportation, management and recovery contractors in Greece and abroad. • The Company continues to consistently invest in the instal- lation of pilot units for the development of research on the utilization of bauxite residues, by participating in European programs concerning the use of energy-efficient “green” technologies for the production of useful products and mate- rials, as well as for the development of technologies for the extraction of rare earth elements. In this context, part of the bauxite residues, on an annual basis, are converted by specific Circular economy (Waste management) Materiality assessment process results. Scale: [0—4] where 0 “Not significant” and 4 “Very significant” 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 industrial units of MYTILINEOS. The management of the topic by MYTILINEOS contributes to the Sustainable Development: • Customers • Local communities • Sustainable Development Organizations • Shareholders / Investors • Academic community • Media representatives in the context of their cooperation with MYTILINEOS. • In waste reduction through prevention, recycling and reuse. • In the reuse of materials, expanding the life cycle of products in order to reuse them, creating additional economic value. • In the reduction of wastewater that does not undergo treatment as well as in the substantial increase of recycling and reuse of water at national level. By whomare the impacts caused: The impacts are primarily caused by the MYTILINEOS Metallurgy sector and by indirect contributions the stakeholders may have. Impact on Sustainable Development 2,90 Significance for Stakeholders 3,53 Management Approach [GRI 102-11] [GRI 103-2c] The purpose of this disclosure is to provide information and data to MYTILINEOS' Stakeholder groups, so that they can understand how the Company manages the waste resulting from its production process, given that proper waste management contributes to its efficient operation and to its compliance with the environmental legislation, while minimizing the environmental impacts for all recipients. [GRI 103-2b] processes into cast iron (raw material for the steel industry) as well as into molded stone wool which is used to meet internal needs of the plant. • In the Metallurgy sector, which accounts for 99% of the Company's total waste (of which 95% are bauxite residues), the aluminium production plant maintains and uses specially con- figured sites for the final disposal of waste (Controlled Landfill for Hazardous Waste and Controlled Landfill for Non-Hazardous Waste) in the area of Agios Athanasios, while bauxite resi- dues (non-hazardous waste) are deposited at the same gradient with that of the natural relief of the disposal site . • As regards the management of the water discharges resulting from MYTILINEOS' activity, this is fully 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 Units have obtained their environ- mental licenses. • In the Metallurgy sector, which produces the largest quantity of liquid waste, the largest part of this waste is recycled within the production process itself. More specifically, the aluminium production plant uses an underground system of water or efflu- ents collection pipes, which leads to a liquid industrial waste treatment plant featuring settling basins, an oil separator and a multi-layered activated carbon filter. The pH value, temperature and flow are constantly measured and monitored online. There is also a safety tank with a capacity of 1,330 m3, to which waste is fed, when necessary, by an automatic diversion system. • Moreover, three Biological Treatment Facilities are in oper- ation in the Metallurgy sector, covering the aluminium production plant's and the local communities' needs in water: The Biological Treatment Facility in Aspra Spitia & Antikyra, the Biological Treatment Facility in Agios Nikolaos, with a capacity of 200 residents, serving the homonymous settlement, and the Plant's Biological Treatment Facility with a capacity of 2,000 people, serving the plant's population. The Biological Treatment Facility in Aspra Spitia & Antikyra was the first biological treat- ment facility for urban waste water in Greece and was built together with the settlement, by the company Degrémont France. Following its upgrade in 1995, the facility has a capacity of 10,000 people. In accordance with the Environmental Terms Approval Decision, monthly analyses are carried out by the scientific quality control laboratory, which has been accredited by the Hellenic Accreditation System in accordance with the ELOT EN ISO 17025 standard. During the bathing season (May – September), seawater samples are taken at eight (8) locations in the Antikyra Bay. These locations include the sea point exit of the treated water pipe from the Biological Treatment Station of Aspra Spitia & Antikyra. The results related to this location have demonstrated that the samples taken comply with the legally required limits for exceptional-quality coastal water and are completely free of pathogenic micro-organisms. Key Challenges / Impacts [GRI 103-1a] [GRI 102-15] 83 82

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