Environmental Impact Assessment (EIA)
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Rev UKCS Decommissioning Project F 12.03.2018 Update after Consultation AMB AW MB E 12.12.2017 Issued for Consultation AMB LR MB D 05.12.2017 Re-issued as Final AMB LR MB C 06.11.2017 Re-issued as Final AMB KC MB B 24.08.2017 Re-issued as Final AMB KC MB A 11.07.2017 Issued as final AMB LF LF 03 07.06.2017 Issued for Review AMB LF PT 02 03.05.2017 Issued for Review AMB LF PT 01 22.01.2016 Outline Content for Review PT LF PT Rev. Date Description Prep. by Check. by Appr. by Facility: Rev Area: N/A System: N/A AFA: N/A Revision: Document Title: Rev UKCS Decommissioning Project EIA Report F Total Pages Document No.: Rev01-27388-S-RA-0002 118 Doc. Title: Rev UKCS Decommissioning Project EIA Report Document No.: REV01-27338-S-RA-0002 Rev.: F CONTENT Standard Information Sheet .................................................................................... 7 Abbreviations ........................................................................................................... 8 Non-Technical Summary ....................................................................................... 12 Introduction ......................................................................................................................... 12 Scope of the Rev UKCS Decommissioning Project ............................................................. 13 Preparation for decommissioning ........................................................................................ 14 Options for decommissioning .............................................................................................. 15 Decommissioning programme ............................................................................................. 16 Environmental management ............................................................................................... 18 Environment description ...................................................................................................... 19 Impact Assessment ............................................................................................................. 20 Conclusions ......................................................................................................................... 23 1 Introduction ....................................................................................................... 24 1.1 Rev Field Description .......................................................................................................... 24 1.2 The Rev Field Decommissioning Project ............................................................................. 26 1.3 Purpose and Scope of the Environmental Impact Assessment (EIA) .................................. 27 1.3.1 Purpose of this Document and the EIA ................................................................ 27 1.3.2 Structure of this EIA report ................................................................................... 27 1.3.3 Geographical scope ............................................................................................. 28 1.3.4 EIA scope ............................................................................................................ 28 1.4 Permits, Consents and Other Related Documents .............................................................. 28 1.5 Regulatory context .............................................................................................................. 28 1.5.1 Decision-making .................................................................................................. 28 1.5.2 Regulatory submission ........................................................................................ 29 1.5.3 Protected sites ..................................................................................................... 29 1.5.4 Scottish National Marine Plan .............................................................................. 29 1.6 Environmental Management ............................................................................................... 30 2 Stakeholder Consultation ................................................................................ 32 2.1 Engagement Strategy .......................................................................................................... 32 2.2 Consultation ........................................................................................................................ 32 3 Project Description ........................................................................................... 36 3.1 Introduction ......................................................................................................................... 36 3.2 Consideration of Alternative Use ......................................................................................... 36 3.3 Scope of Proposed REV UKCS Decommissioning Project ................................................. 36 3.3.1 UK – Norway transition ........................................................................................ 36 3.4 Description of Infrastructure and Materials Inventory .......................................................... 37 3.4.1 Overview of Rev infrastructure to be removed in Norway (outwith EIA scope) .... 37 Page 2 of 118 Doc. Title: Rev UKCS Decommissioning Project EIA Report Document No.: REV01-27338-S-RA-0002 Rev.: F 3.4.2 Infrastructure to be removed as part of the Rev UKCS Decommissioning Project (within EIA scope) ................................................................................................ 38 3.5 Preparation for Decommissioning ....................................................................................... 39 3.6 Option Selection .................................................................................................................. 40 3.6.1 Comparative assessment process ....................................................................... 40 3.6.2 Options for decommissioning ............................................................................... 41 3.6.3 Decommissioning activities .................................................................................. 41 3.7 Post Decommissioning Surveys .......................................................................................... 46 3.8 Monitoring ........................................................................................................................... 46 4 Environmental Management ............................................................................ 48 4.1 Introduction ......................................................................................................................... 48 4.2 Environmental Policy, Management System and Management Plan .................................. 48 4.3 Contractor Management ...................................................................................................... 48 4.4 Onshore Management ......................................................................................................... 48 4.5 Environmental Monitoring .................................................................................................... 50 4.6 Environmental Awareness and Training .............................................................................. 50 4.7 Scottish Marine Plan ........................................................................................................... 50 5 Environmental Baseline ................................................................................... 52 5.1 Introduction ......................................................................................................................... 52 5.2 Data Gaps and Uncertainties .............................................................................................. 52 5.3 Data Sources....................................................................................................................... 52 5.4 Physical Environment .......................................................................................................... 54 5.4.1 Weather and sea conditions ................................................................................ 54 5.4.2 Currents ............................................................................................................... 55 5.4.3 Wave height ......................................................................................................... 55 5.4.4 Water temperature and salinity ............................................................................ 55 5.4.5 Bathymetry and Seabed Conditions .................................................................... 55 5.5 Biological Environment ........................................................................................................ 59 5.5.1 Plankton ............................................................................................................... 59 5.5.2 Benthos................................................................................................................ 60 5.5.3 Fish and Shellfish ................................................................................................ 60 5.5.4 Seabirds............................................................................................................... 62 5.5.5 Marine mammals ................................................................................................. 64 5.6 Conservation ......................................................................................................................