Critical Review of
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Critical Review of "Metals Environmental Risk Assessment Guidance for Metals" (MERAG)

Risk assessment of metals may need specific guidance in how to handle natural background, essentiality, and long historical use of metals. It may also be necessary to take bio-availability into account. The aim of the present project was to critically review proposals on principles for risk assessment of metals (MERAG), developed by the metals industry, in co-operation with the UK Government during 2005-2006. The different MERAG proposals were reviewed by different Nordic consultancies, and their views are summarised in the report. The project was initiated and coordinated by the Nordic Risk Assessment Project (NORAP), which receives funding from the Nordic Chemicals group, a subgroup to the Nordic Council of Ministers. This review was considered urgent, in order to be prepared for a possible proposal to implement the MERAG principles within the Technical Guidance Document on Chemical Safety Assessment, which is developed for use under the REACH regulation.

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Fact sheet 3 "Data compilation, selection and derivation of PNEC values for the risk assessment of different environmental compartments (water, sewage treatment plants, soil, sediment)" and Chapter 1 in the background document: "Metals are intrinsic part You do not have access to this content

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Nordic Council of Ministers

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"Data selected for PNEC derivation should comply with the requirements (criteria) for data quality and data relevance taking into account metal specific considerations. Therefore, it is deemed necessary to develop first a set of metal specific reliability and relevance criteria against which to evaluate the ecotoxicity data to be used. In the subsequent sections guidance is provided on data quality, aggregation, interpretation, derivation of the PNEC values"