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Anglia FOUR that would be lost if the entire windfarm were to be built within each habitat (worst case scenario).
This will then be put into the context of the wider zone.
4.1.2.3 Smothering: 32.
Small volumes of sediment could be re‐suspended during maintenance activities; the volumes will be lower than for construction. Changes in coastal processes in the area caused by the deployment of the windfarm may also lead to increased sediment deposition on the seabed. It is not expected that there would be significant smothering effects during operation.
4.1.2.3.1 Proposed method for assessment: The information generated by the physical processes chapters will be used to determine the magnitude of smothering both in terms of the area impacted and the thickness of deposited material.
Assessment of the sensitivities will be guided by the assessments available on MarLIN.
4.1.2.4 Re‐mobilisation of contaminated sediments: 33.
Given the likely levels of sediment contamination and the low levels of sediment disturbance that will occur during operation, this impact is likely to have a very low magnitude.
4.1.2.4.1 Proposed method for assessment: •
The magnitude of the impact will be assessed based on the levels of
contamination within the sites and the maximum amount of sediment disturbance that will occur during operation.
Contamination levels of the sediment will be derived from existing data (for example the National Marine Monitoring Programme (NMMP) Cefas 2001) and results of sampling carried out by EAOW. Contaminant sampling carried out by EAOW includes:
o East Anglia ONE cable route sampling (in the Warren Springs disused disposal ground (which covers East Anglia ONE and part of the cable route)) and
o East Anglia 2013 contaminated sediment sampling within sites East Anglia THREE and East Anglia FOUR and along the cable route.
Assessment of the sensitivities will be guided by the assessments available on MarLIN.
Evidence Plan Benthic Ecology Method Statement
East Anglia THREE & East Anglia FOUR Offshore Windfarms