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General comment The values determined to calculate the LCA originate from verified Dolina Nidy inventory data.
The data for the processes come from the following databases: Ecoinvent v.3.5, specific EPDs, ELCD, Ullmann’s, ITB-Data. Specific data quality analysis was a part of external ISO 14001 audit. Characterization factors are CML ver. 4.2 based on EN 15804:2013+A1 version (PN-EN 15804+A1:2014-04).
The allocation rules used for this EPD are based on general ITB PCR A. Production of the gypsum binders and anhydrite is a line process in two production plants of Dolina Nidy in Leszcze and Konin (Poland). Allocation was done on product mass basis. All impacts from raw materials extraction are allocated in A1 module of the EPD (including materials and energy consumption, transportation, emissions and wastes resulting from the production of the gypsum plasters). 100% of impacts from line production of Dolina Nidy were inventoried and were allocated to the the gypsum binders and anhydrite production. Municipal waste and waste water of Leszcze and Konin factories were allocated to module A3. Energy supply was inventoried for whole production processes. Emissions in the factories were measured and were allocated to module A3.
The life cycle analysis of the declared products covers “Product Stage”, A1-A3 modules (Cradle to Gate) in accordance with EN 15804+A1 and ITB PCR A. The details of systems limits are provided in product technical report. All materials and energy consumption inventoried in factories and were included in calculation. In the assessment, all significant parameters from gathered production data are considered, i.e. all material used per formulation, utiliZed thermal energy, internal fuel and electric power consumption, direct production waste, and all available emission measurements. It can be assumed that the total sum of omitted processes does not exceed 5% of all impact categories. In accordance with EN 15804+A1, machines and facilities (capital goods) required for and during production are excluded, as is transportation of employees.
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