8.3.3 Embedded Mitigation Specific to Marine Water and Sediment Quality 11.
12. 13.
EATL is committed to the use of best practice techniques and due diligence throughout all construction, operation and maintenance activities.
Oils and lubricants used in the wind turbines would be biodegradable where possible and all chemicals would be certified to the relevant standard.
All wind turbines would incorporate appropriate provisions to retain spilled fluids within the nacelle and tower. In addition, converter and collector stations would be designed with a self-contained bund to contain any spills and prevent discharges to the environment.
14.
Best practice procedures would be put in place when transferring oil or fuel between converter and collector stations and service vessels. Appropriate Spill Plan procedures would also be implemented in order to appropriately deal with any unexpected discharge into the marine environment.
15.
To avoid discharge or spillage of oils it is anticipated that the transformers would be filled for their operational life and would not need interim oil changes.
8.4 Assessment Methodology
8.4.1 Guidance 16.
The assessment of potential impacts on marine water and sediment quality has been made with specific reference to the relevant NPS. These are the principal decision making documents for NSIPs. Those relevant to the proposed East Anglia THREE project are:
17. Overarching NPS for Energy (EN-1) (DECC 2011a); and NPS for Renewable Energy Infrastructures (EN-3) (DECC 2011b).
The specific assessment requirements for marine water and sediment quality, as detailed in the relevant NPS, are repeated in the following paragraphs. EN-1 Paragraph 5.15.1 states that “Infrastructure development can have adverse effects on the water environment, including groundwater, inland surface waters, transitional waters and coastal waters. During the construction, operation and decommissioning phases, discharges would occur. There may also be an increased risk of spills and leaks of pollutants to the water environment. These effects could lead to adverse impacts on health or on protected species and habitats and could, in particular, result in surface waters, ground waters of protected areas failing to meet environmental objectives established under the Water Framework Directive’’.
Preliminary Environmental Information May 2014
East Anglia THREE Offshore Windfarm
Chapter 8 Marine Water and Sediment Quality Page 9
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