8.
No cumulative impacts have been identified on the marine geology, oceanography and physical processes receptor groups between the proposed East Anglia THREE project and other nearby marine developments and activities (including other windfarm developments, marine aggregate dredging and marine disposal) with one exception. As with the project specific impacts above, no significant cumulative impacts have been identified in relation to the receptors assessed.
9. 10.
No transboundary impacts have been identified upon the marine geology, oceanography and physical processes receptors.
The marine geology, oceanography and physical processes assessment does not rely on other topics, therefore there are no inter-relationships considered within the assessment. However, it should be noted that this chapter is key to the assessments of many of the following offshore topics.
30.2.2 Chapter 8 Marine Water and Sediment Quality 11.
The impact assessment within the PEIR has taken into account the general requirements of key European and national legislation and policy concerning environmental quality standards for chemical contaminants and guideline values to determine sediment quality.
12. A review of existing literature as well as data obtained from a site specific survey has determined that sediment and water quality throughout the East Anglia THREE site and offshore cable corridor is considered to be generally good, with the offshore sample stations having lower levels of contamination than the nearshore stations. However, it should be noted that baseline contamination levels were not significant for any contaminant. The assessment required consideration of the marine geology, oceanography and physical processes assessment in relation to understanding likely effects from sediment transport and morphological effects on the sea bed.
13. No significant impacts on marine water and sediment quality have been identified in the assessment, and through the implementation of the embedded mitigation, all potential impacts are considered to be negligible.
14.
The impacts of the proposed project will be small scale, localised and temporary, for the proposed East Anglia THREE project. Given the distances to other activities in the region (e.g. other offshore windfarms, aggregate extraction) and the localised nature of the impacts there is no pathway for interaction between impacts cumulatively. Whilst it is recognised that across the East Anglia Zone or southern North Sea there would be additive impacts, the overall combined magnitude of these would be negligible relative to the scale of the wider area.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 30 Summary and Conclusion Page 6
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