Shallow Water Absheron Peninsula (SWAP) Exploration Drilling Project Environmental and Socio-Economic Impact Assessment Addendum: Bibiheybat (BHEX01) Exploration Well June 2021 SWAP Exploration Drilling Project Environmental & Socio-Economic Impact Assessment – BHEX01 Addendum Table of Contents 1 Introduction............................................................................................................................... 1-1 2 Summary of BHEX01 Drilling Activities ................................................................................. 2-1 2.1 Introduction ................................................................................................................................. 2-1 2.2 BHEX01 Drilling Programme ...................................................................................................... 2-1 2.3 Logistics, Supply and Equipment ............................................................................................... 2-1 2.4 Drilling Operations and Discharges ............................................................................................ 2-2 2.4.1 Well Design .......................................................................................................................... 2-2 2.4.2 Summary of Mud and Cuttings ............................................................................................. 2-5 2.4.3 Casing and Cementing ......................................................................................................... 2-5 2.4.4 Drilling Hazards and Contingency Chemicals ...................................................................... 2-6 2.5 Well Displacement ...................................................................................................................... 2-6 2.6 Blow Out Preventor (BOP) ......................................................................................................... 2-7 2.7 Well Logging and Abandonment ................................................................................................ 2-7 2.8 Emissions, Discharges and Waste Summary ............................................................................ 2-7 2.8.1 Summary of Emissions to Atmosphere ................................................................................ 2-7 2.8.2 Summary of Discharges to Sea ........................................................................................... 2-8 2.8.3 Summary of Hazardous and Non-Hazardous Waste ........................................................... 2-8 2.9 Management of Change Process ............................................................................................... 2-9 3 Environmental and Socio-Economic Description ............................................................... 3-10 3.1 Introduction ............................................................................................................................... 3-10 3.2 Data Sources ............................................................................................................................ 3-10 3.3 Coastal and Terrestrial Environment ........................................................................................ 3-12 3.3.1 Setting ................................................................................................................................ 3-12 3.3.2 Air Quality ........................................................................................................................... 3-15 3.3.3 Terrestrial Noise ................................................................................................................. 3-15 3.4 Marine Environment ................................................................................................................. 3-17 3.4.1 Marine Environment Survey Data ...................................................................................... 3-17 3.4.2 Seabed Physical and Chemical Environment .................................................................... 3-19 3.4.3 Seabed Biological Environment ......................................................................................... 3-22 3.4.4 Water Column Physical and Chemical Environment ........................................................... 3-1 3.4.5 Water Column Biological Environment ................................................................................ 3-2 3.5 Birds ........................................................................................................................................... 3-6 3.6 Socio-Economic Description ...................................................................................................... 3-6 3.6.1 Introduction ........................................................................................................................... 3-6 3.6.2 Stakeholder Consultation ..................................................................................................... 3-7 3.6.3 Shipping, Ports and Existing Offshore Infrastructure ........................................................... 3-8 3.6.4 Marine Cultural Heritage ...................................................................................................... 3-9 4 Impact Assessment .................................................................................................................. 4-1 4.1 Introduction ................................................................................................................................. 4-1 4.2 Scoping ....................................................................................................................................... 4-1 4.3 Impacts to the Atmosphere ........................................................................................................ 4-4 4.3.1 Mitigation .............................................................................................................................. 4-4 4.3.2 Jack-up Rig Power Generation and Support Vessel Engine Emissions .............................. 4-4 4.4 Impacts to the Marine Environment ........................................................................................... 4-7 4.4.1 Mitigation .............................................................................................................................. 4-7 4.4.2 Underwater Sound ............................................................................................................... 4-8 4.4.3 Cooling Water Intake and Discharge ................................................................................. 4-10 4.4.4 Other Discharges to Sea .................................................................................................... 4-12 4.4.5 Seabed Disturbance ........................................................................................................... 4-14 June 2021 Draft Final SWAP Exploration Drilling Project Environmental & Socio-Economic Impact Assessment – BHEX01 Addendum 4.5 Summary of the Project Activities Residual Environmental Impacts ........................................ 4-16 5 Cumulative and Transboundary Impacts and Accidental Events ....................................... 5-1 5.1 Introduction ................................................................................................................................. 5-1 5.2 Cumulative and Transboundary Impacts ................................................................................... 5-1 5.2.1 Approach to the Cumulative Assessment ............................................................................ 5-1 5.2.2 Cumulative Impact between Separate Project Impacts ....................................................... 5-1 5.2.3 Cumulative Impact with Other Projects ................................................................................ 5-2 5.2.4 Transboundary Impacts Associated with Greenhouse Gas Atmospheric Emissions .......... 5-2 5.3 Accidental Events ....................................................................................................................... 5-2 5.3.1 Vessel Collision .................................................................................................................... 5-3 5.3.2 Release of Chemicals / Waste ............................................................................................. 5-3 5.3.3 Hydrocarbon Spills and Releases ........................................................................................ 5-3 5.3.4 Spill Prevention and Response Planning ........................................................................... 5-27 6 Environmental and Social Management ................................................................................ 6-1 6.1 Overview of Environmental and Social Management ................................................................ 6-1 7 Residual Impacts and Conclusions ........................................................................................ 7-1 7.1 Introduction ................................................................................................................................. 7-1 7.2 Residual Impacts ........................................................................................................................ 7-1 7.3 Cumulative, Transboundary Impacts and Accidental Events ..................................................... 7-2 7.4 Environmental and Social Management ...................................................................................