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RWE Innogy UK | Triton Knoll Electrical System, Onshore Crossing Schedule Triton Knoll Offshore Wind Farm Limited TRITON KNOLL ELECTRICAL SYSTEM Annex 6-1: Geology and Ground Conditions Baseline Study April 2015 Document Reference 6.2.5.5.6.1 Pursuant to: APFP Reg. 5(2)(a) 1 RWE Innogy UK | Triton Knoll Electrical System, Geology Baseline Triton Knoll Electrical System Triton Knoll Offshore Wind Farm Limited Copyright © 2015 RWE Innogy UK Ltd Environmental Statement All pre-existing rights reserved. Application Document 6.2.5.5.6.1 Liability Annex 6-1: Geology and Ground Conditions Baseline Study In preparation of this document Triton Knoll Offshore Wind Farm Limited (TKOWFL), a joint April 2015 venture between RWE Innogy UK (RWE) and Statkraft UK, subconsultants working on behalf of TKOWFL, have made reasonable efforts to ensure Drafted By: PMSL that the content is accurate, up to date and Approved By: Kim Gauld-Clark complete for the purpose for which it was prepared. Date of April 2015 Neither TKOWFL nor their subcontractors make any Approval warranty as to the accuracy or completeness of Revision A material supplied. Other than any liability on TKOWFL or their subcontractors detailed in the Triton Knoll Offshore Wind Farm Ltd contracts between the parties for this work neither Auckland House TKOWFL or their subcontractors shall have any Great Western Way liability for any loss, damage, injury, claim, expense, Swindon cost or other consequence arising as a result of use Wiltshire, SN5 8ZT or reliance upon any information contained in or omitted from this document. T +44 (0)845 720 090 Any persons intending to use this document should F +44 (0)845 720 050 satisfy themselves as to its applicability for their I www.rweinnogy.com intended purpose. Where appropriate, the user of this document has the obligation to employ safe www.rweinnogy.com/tritonknoll working practices for any activities referred to and [email protected] to adopt specific practices appropriate to local conditions. Triton Knoll Offshore Wind Farm Limited have been awarded EU TEN-E funding to support the development of the Triton Knoll Offshore Wind Farm Electrical System located in both UK Territorial waters and the UK’s Exclusive Economic Zone. The funding which is to be matched will support a number of surveys, engineering reports, and environmental impact assessment studies for the Triton Knoll Electrical System. The studies will form part of the formal documentation that will accompany the Development Consent Order which will be submitted to the Planning Inspectorate. The sum of €1,159,559 has been granted and the process to reclaim this funding is ongoing. Triton Knoll Offshore Wind Farm Ltd TRITON KNOLL ELECTRICAL SYSTEM Annex 6-1: Geology and Ground Conditions Baseline Study 80427 DECEMBER 2014 RSK GENERAL NOTES Project No.: 80427 Title: Annex 6-1: Geology and Ground Conditions Baseline Study Client: Triton Knoll Offshore Wind Farm Ltd, Auckland House, Great Western Way, Swindon Wiltshire, SN5 8ZT Date: December 2014 Office: The Old School, Stillhouse Lane, Bedminster, Bristol, BS3 4EB Tel: 0117 947 1006, contact: Tony Morton Status: Final Author Tony Morton Technical reviewer Andrew Przewieslik Signature Signature Date: December 2014 Date: December 2014 Project manager Tony Morton Signature Date: December 2014 RSK Environment Limited (RSK) has prepared this report for the sole use of the client, showing reasonable skill and care, for the intended purposes as stated in the agreement under which this work was completed. The report may not be relied upon by any other party without the express agreement of the client and RSK. No other warranty, expressed or implied, is made as to the professional advice included in this report. Where any data supplied by the client or from other sources have been used, it has been assumed that the information is correct. No responsibility can be accepted by RSK for inaccuracies in the data supplied by any other party. The conclusions and recommendations in this report are based on the assumption that all relevant information has been supplied by those bodies from whom it was requested. No part of this report may be copied or duplicated without the express permission of RSK and the party for whom it was prepared. Where field investigations have been carried out, these have been restricted to a level of detail required to achieve the stated objectives of the work. This work has been undertaken in accordance with the quality management system of RSK Environment Ltd. CONTENTS 1 INTRODUCTION .............................................................................................................................. 2 1.2 Objective and aims .................................................................................................................. 2 1.3 Scope ....................................................................................................................................... 2 2 BASELINE DATA ............................................................................................................................ 4 2.1 Data Sources ........................................................................................................................... 4 2.2 Study area description ............................................................................................................. 4 2.3 Designated sites ...................................................................................................................... 5 2.4 Superficial geology ................................................................................................................... 5 2.5 Hydrogeology of superficial deposits ....................................................................................... 7 2.6 Solid geology............................................................................................................................ 8 2.7 Hydrogeology of solid strata .................................................................................................... 8 2.8 Potable groundwater abstractions ........................................................................................... 9 2.9 Potable surface water abstraction............................................................................................ 9 2.10 Radon and Ground Gas ........................................................................................................... 9 2.11 Mineral resources .................................................................................................................... 9 2.12 Environment Agency recorded landfills ................................................................................. 10 2.13 Environment Agency recorded waste sites ............................................................................ 10 2.14 Environment Agency recorded pollution incidents ................................................................. 11 REFERENCES ..................................................................................................................................... 12 FIGURES Figure 1-1 Superficial Geology and Site Features Figure 1-2 Solid Geology APPENDICES Appendix 1-1 Photographs Appendix 1-2 British Geological Survey Boreholes Triton Knoll Offshore Wind Farm Ltd Geology and Ground Conditions Baseline Study Report no.80427 1 INTRODUCTION 1.1.1 RSK Environment Limited (RSK) was commissioned by Triton Knoll Offshore Wind Farm Limited (TKOWFL) to carry out a baseline study in support of the Environmental Impact Assessment (EIA) for the onshore element of the Triton Knoll Electrical System. 1.2 Objective and aims 1.2.1 The objective of the baseline study is to collate geological and ground conditions information pertaining to the study area to allow the identification of features that could impact or be impacted by the proposed development. 1.3 Scope 1.3.1 The scope of works for this baseline study was set out within the scoping report, dated March 2014 and comprises a desk study that includes a review of publicly available information relating to the proposed development including: • Mapping including geological maps (both solid and drift geology), hydrogeological maps, groundwater vulnerability maps; • Publicly available borehole records held by the British Geological Survey (BGS); • An assessment of the environmental sensitivity of the study area, through a review of available geological and hydrogeological data and mapping to identify geologically designated sites; • Details of nearby pollution incidents, landfill sites and groundwater source protection zones (SPZ) obtained from the Environment Agency (EA); and • An assessment of BGS minerals data. 1.3.2 The study area is defined as comprising the application boundary plus a 100m buffer either side; features of particular significance are included where relevant to geology and ground conditions. 1.3.3 A walkover of the study area was undertaken on 23rd and 24th April 2014 to confirm the current status of the study area, surrounding land-use, the potential for contamination from previous site activity, and identify any areas of potential concern. The walkover also assisted in confirming the findings of the desk-based study and to identify any omissions. Triton Knoll Offshore Wind Farm Ltd 2-1 Geology and Ground Conditions Baseline Study Report no. 80427 1.3.4 The baseline data will be used within the ES chapter and used in the assessment of potential impacts arising from the proposed development.

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