Småhus, flerbostadshus och förskolebyggnader - Svanen

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Nordisk Miljømerking Hus, leiligheter og barnehager 089/versjon 2 Høringssammenstilling, oppdatert 10. august 2010 5.5. Andre krav til byggprodukter, materialer og interiører O28 Fasade og takbekledning International Zinc Association Galvanised products and products made of zinc emit zinc and zinc compounds to the surrounding environment (especially water and earth) where they can accumulate in the food chain. On the suggested accumulation of zinc in the food chain, the conclusion of the EU risk assessment is clear: “it is concluded that secondary poisoning is considered to be not relevant in the effect assessment of zinc. Major decision points for this conclusion are the following. The accumulation of zinc, an essential element, is regulated in animals of several taxonomic groups, for example in molluscs, crustaceans, fish and mammals. In mammals, one of the two target species for secondary poisoning, both the absorption of zinc from the diet and the excretion of zinc, are regulated. This allows mammals, within certain limits, to maintain their total body zinc level (whole body homeostasis) and to maintain physiologically required levels of zinc in their various tissues, both at low and high dietary zinc intakes. The results of field studies, in which relatively small differences were found in the zinc levels of small mammals from control and polluted sites, are in accordance with the homeostatic mechanism. These data indicate that the bioaccumulation potential of zinc in both herbivorous and carnivorous mammals will be low. Based on the above data, secondary poisoning and the related issues ioaccumulation and biomagnification are not further discussed in this report”. (Risk Assessment Zinc metal, ECB 2008, page 292). Zinc itself is a trace element without particularly toxic properties. Zinc is an essential element for all life forms and it is required to ensure normal growth and development. Nature and humans have a natural regulating system for zinc allowing for adequate uptake/elimination, in accordance to the nutritional needs. The Predicted No Effects Concentrations (PNECs), set in the zinc risk assessment report, therefore recognize zinc excess as well as zinc deficiency and integrate the concepts of zinc bioavailability. Van Sprang et al. (2009) have gone through a revision of the zinc risk assessment using the most recent and up-to-date scientific concepts and bioavailability tools. Over the nine European river basin studied, deterministic risk characterization ratios were all below one, suggesting that there is no deterministic risk associated with current use patterns of Zn in these river basins. Zinc causes the release of cadmium since cadmium is an associated substance in zinc. Today’s rolled zinc has to comply with European Standards, as defined by CEN/CENELEC Internal Regulation. Those standards, prepared by TC CEN/TC 209 define products requirements, in this case specifications for rolled flat products for building, including zinc. In such application zinc is alloyed with copper and titanium, and it has a content of 99.995% zinc Super High Grade Z1, which is compliant with EN1179 standard. The EN1179 standard specifies that zinc cannot contain more than 0.003% 148 (165)
Nordisk Miljømerking Hus, leiligheter og barnehager 089/versjon 2 Høringssammenstilling, oppdatert 10. august 2010 cadmium. In practice, trace cadmium levels in zinc are often up to ten times lower than is required by EN 1179. Cadmium content in today’s rolled zinc is therefore extremely minor. In conclusion, the recommendation under #O28 is not justified based on the extended scientific information available on zinc metal. Implementation of the proposed restriction will compromise the overall environmental life cycle performance of buildings in the Nordic Countries, in particular in the durability, recyclability and energy profile of roofing and cladding. References cited: - EU 2008. Risk Assessment Zinc metal (http://ecb.jrc.ec.europa.eu/DOCUMENTS/Existing- Chemicals/RISK_ASSESSMENT/REPORT/zincmetalreport072.pdf) - EU 2008. Official Journal of the EU Commission, Recommendations from Risk Reduction Strategy http://ecb.jrc.ec.europa.eu/DOCUMENTS/Existing- Chemicals/RISK_ASSESSMENT/OJ_RECOMMENDATION/ojrec7440666.pdf - Hüffmeyer et al. 2009. Geo-referenced modeling of zinc concentrations in the Ruhr river basin (Germany) using the model GREAT-ER. Sci. Tot. Env. 407, 2296-2305. - Van Sprang et al. 2009. Environmental risk assessment of zinc in European freshwaters: A critical appraisal. Sci. Tot.Env., in press (doi:10.1016/j.scitotenv.2009.06.029). Contact person 1 Name: Kai Nikkanen (kai.nykanen@boliden.com) Company: Boliden Kokkola Address: P.O. Box 26, FIN-67101 Kokkola, Finland Telephone: +358 6 828 6820 Contact person 2 Name: Delphine Haesaerts Ph. D. (dhaesaerts@iza.com) Company: INTERNATIONAL ZINC ASSOCIATION-EUROPE Address: Avenue de Tervuren, 168 / Box 4, B-1150 Brussels Telephone: +32 2 7760096 11. European Copper Institute and Scandinavian Copper Development Association Comments to individual statements in the background document: Copper is not subject to classification, but some copper compounds are toxic to aquatic organisms. Solid copper is not classified because the release rate of copper ions from massive materials is too small to warrant classification. Read-across of a classification outcome from soluble copper compounds to copper metal is not in line with EU regulations on classification and labeling (see Annex IV in http://guidance.echa.europa.eu/docs/guidance_document/clp_en.htm?time=12.). 149 (165)
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Småhus, flerbostadshus och förskolebyggnader - Svanen

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