sediments and contaminants as well as accidental releases and spills that may arise during construction, operational and decommissioning activities, on the existing water and sediment quality.


119. The information provided in this chapter suggests that the extent and severity of the activities associated with the project’s construction, operation and decommissioning are not significant enough to have an adverse impact on marine water and sediment quality. Therefore, along with this information and through the implementation of the embedded mitigation, the impacts of the proposed East Anglia THREE project on marine water and sediment quality is anticipated to be negligible.


120. Table 8.16 summarises the sensitivity, magnitude and significance of the predicted impacts as well as mitigation measures and residual impacts from the construction, operation and decommissioning phases of the proposed project.


Table 8.16 Potential Impacts Identified for Marine Water and Sediment Quality Potential Impact


Mitigation Construction


Re-suspension of sediments during foundation and inter array cable installation


Re-suspension of contaminants during offshore cable installation


Risk of accidental pollution


Re-suspension of sediments (landfall)


Operation


Re-suspension of sediments from scour


Risk of accidental pollution


Decommissioning


Re-suspension of sediments and contaminants


Risk of accidental pollution


Preliminary Environmental Information May 2014


N/A N/A Water Quality Water Quality Low Negligible East Anglia THREE Offshore Windfarm Negligible Negligible Negligible Negligible


Chapter 8 Marine Water and Sediment Quality Page 36


N/A N/A Water Quality Water Quality Low Low Negligible Negligible Negligible Negligible N/A Water quality Low Negligible Negligible Receptor


Value/ Sensitivity


Magnitude Significance


N/A


Water quality


Low


Negligible


Negligible


N/A N/A


Water quality Water quality


Low Low


Negligible Negligible


Negligible Negligible


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