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Sediment toxicity

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The need of the study depends on the outcome of the chemical safety assessment. In a first step, the PNEC sediment is calculated based on the PNEC aquatic using the equilibrium partitioning method as recommended in the "Guidance on information requirements and chemical safety assessment, chapter R10: Characterisation of dose [concentration]-response for environment" (ECHA, 2008). The predicted environmental concentration in the sediment is below the calculated PNEC for sediment dwellers (please refer to chapter 10 of the CSR), and thus, a chronic study with sediment organisms is not needed for a refinement of the PNEC sediment. 

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