Conclusions and Next Steps in Risk Assessment

This fact sheet presents the approach for data gathering, data selection, and data aggregation to be used for the derivation of the PNEC value for the freshwater sediment compartment based on the statistical extrapolation method using the SSD approach. Because the ecotoxicity of nickel is mitigated by the physico-chemistry of the sediment (AVS) it is highly recommended to normalize the ecotoxicity data for PNEC derivation using the available bioavailability models as described in the Fact Sheet 9, Incorporation of Bioavailability in the Sediment Compartment.