Hazbref2

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At this point the environmental PEC/PNEC ratio is not addressed.
The environmental risk assessment is a step later at the end. To
ensure the proper performance within the WWTP, the protection
of WWTP’s microorganism flora is in focus here.\\
\\
E: Take into account that the substance might be used in different products / mixtures or processes. Worst case is that PEC / PNEC > 1. For more detailed information please refer to the following ECHA Guidance documents on exposure assessment as well as risk management measures and operational conditions. 

ECHA Guidance R 16- Guidance on information requirements and chemical safety assessment - Chapter R.16: Environmental exposure assessment:[[https://echa.europa.eu/documents/10162/13632/information_requirements_r16_en.pdf/b9f0f406-ff5f-4315-908e-e5f83115d6af|Link]]\\
ECHA Guidance R 13- Guidance on information requirements and chemical safety assessment - Chapter R.13: Risk management measures and operational conditions. [[https://echa.europa.eu/documents/10162/13632/information_requirements_r13_en.pdf/1f6d95d0-a9cb-479d-889e-f7f528e69fbd|Link]]\\
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