1 INTRODUCTION
East Anglia Offshore Wind Limited (EAOW) has been awarded a licence by The Crown Estate to develop approximately 7,200MW of wind capacity off the coast of East Anglia (referenced as the East Anglia Zone).
The East Anglia Zone will be developed as a number of individual windfarms, each dependent on securing the relevant statutory consents and approvals.
The first
windfarm is proposed in an area in the south of the East Anglia Zone and is known as East Anglia ONE Windfarm (East Anglia ONE).
As part of the works required to complete an environmental assessment of the site, RSK Environment Ltd (RSK) has been commissioned to complete an Environmental Statement report. A preliminary risk assessment (PRA) is necessary to determine any significant issues relating to ground conditions at the landfall site, along the proposed Onshore Cable Route and at the Converter Station Refined Area of Search. This document reports the findings of the PRA. Information provided in this PRA will also be used in completing the Environmental Statement chapter relating to ground conditions.
For additional details relating to the scope and details of the project, reference should be made to the full Environmental Statement report.
This PRA report is subject to the RSK Environment Limited service constraints provided as Appendix B to this report.
1.1 Aims and scope
The aim of this preliminary risk assessment is to enable an evaluation of the ground conditions of the landfall site, Onshore Cable Route, Converter Station Compound and surrounding area in terms of its history and environmental setting. From this information, a conceptual site model (CSM) can be produced to fully inform future site investigation design and to aid in final micrositing the landfall location, Onshore Cable Route and Converter Station Compound.
The scope of the PRA desk study and the layout of this report has been designed with consideration of CLR11 (Environment Agency, 2004), BS 10175: 2011 (BSI, 2011) and PPS23 (ODPM, 2004), plus guidance on land contamination reports issued by the Environment Agency (2010).
The scope of works for the assessment included a review of geological, hydrogeological and hydrological information and a review of a commercially available environmental database (envirocheck),
including historical plans. This information will be used to
develop an initial CSM to consider any potentially complete pollutant linkages (see Section 3.7).
1.2 Existing reports
RSK has not been provided with any existing reports by the client relating to ground conditions or site investigation work in the area of the project.
East Anglia Offshore Wind Limited
Preliminary Risk Assessment, East Anglia ONE Windfarm 41388-PRA(03)
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