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General comment The values determined to calculate A1-A3 originate from verified Process LCI inventory data from manufacturing plant. A1 values were prepared considering input products characteristics and are based on Ecoinvent v 3.10 and available supplier EPDs. The energy consumption in production and its impact on the production process were inventoried and calculated. For aluminium, the weighted average carbon footprint declared by suppliers was used. In accordance with Annex E of the EN 15804 + A2, a data quality assessment was performed. For technical representativeness, processes with a quality level of "very good" account for 99% of the value for climate change indicator. For geographical and time representativeness, processes level of "very good" is obtained.
The allocation principles used in this EPD are based on the general standards ITB PCR A v. 1.6 and EN 15804+A2. The production of aluminium products is carried out by Gränges Konin S.A. at the production plant located in Konin (Poland) and covers 100% of production. The allocation is made based on the product weight. All predicted impacts from the extraction and processing of raw materials are allocated in module A1 of the LCA. Raw materials for production such as external scrap for remelting, primary aluminium and recycled aluminium are supplied from external suppliers. Impacts from the global linear production of Gränges Konin S.A. are estimated at 100% and have been assigned to the production of aluminium products. Water and energy consumption, related emissions and waste generation are assigned to module A3. Packaging materials are taken into account.
It can be assumed that the total sum of omitted processes does not exceed 2% of all impact categories. In accordance with EN 15804+A2, machines and facilities (capital goods) required for the production as well as transportation of employees were not included in LCA.
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