Gorgon Emp Offshore Feed Gas Pipeline Installation Management Plan

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    Document No: G1-NT-PLNX0000298 Revision: 4

    Revision Date: 10 June 2014 Copy No:

    IP Security: Public

    Gorgon Gas Development andJansz Feed Gas Pipeline

    Offshore Feed Gas Pipeline InstallationManagement Plan

    © Chevron Australia Pty Ltd

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    Document No: G1-NT-PLNX0000298 Gorgon Gas Development and Jansz Feed Gas Pipeline:

    Revision Date: 10 June 2014Offshore Feed Gas Pipeline Installation Management Plan

    Revision: 4

    © Chevron Australia Pty Ltd Public Page vPrinted Date: 14 July 2014 Uncontrolled when Printed 

    Table of Contents

    Terminology, Definitions, and Abbreviations ......................................................................................... 12 

    1.0 Introduction ..................................................................................................................................... 25 

    1.1 Proponent ................................................................................................................................ 25 

    1.2 Project ..................................................................................................................................... 25 

    1.3 Location Summary .................................................................................................................. 25 

    1.4 Scope of this Plan ................................................................................................................... 28 

    1.5 Project Environmental Approvals ............................................................................................ 28 

    1.6 Purpose of this Plan ................................................................................................................ 30 

    1.7 Format of this Plan .................................................................................................................. 47 

    2.0 Environmental Management Framework ...................................................................................... 49 

    2.1 Regulatory Framework ............................................................................................................ 49 

    2.2 Codes of Practices .................................................................................................................. 52 

    3.0 Activities Description ..................................................................................................................... 54 

    3.1 Timing and Schedule .............................................................................................................. 55 

    3.2 Subsea System Overview ....................................................................................................... 55 

    3.3 Pipeline and Umbilical Route .................................................................................................. 57 

    3.4 Installation Methodology ......................................................................................................... 62 

    3.5 Unplanned Events ................................................................................................................... 75 

    3.6 Event Response Activities .................................................................................................... 123 

    4.0 Description of Environment ......................................................................................................... 124 

    4.1 Regional Overview ................................................................................................................ 129 

    4.2 Physical Marine Environment ............................................................................................... 136 

    4.3 Bathymetry and Sea Floor Topography ................................................................................ 141 

    4.4 Ecological Environment ........................................................................................................ 144 

    4.5 Socioeconomic Environment ................................................................................................ 185 

    5.0 Methodology for Environmental Risk Assessment and Management Measures ................... 204 

    5.1 Overview ............................................................................................................................... 204 

    5.2 Methodology .......................................................................................................................... 204 

    5.3 Determination of As Low As Reasonably Practicable (ALARP) ........................................... 209 

    5.4 Determination of Acceptable ................................................................................................. 211 

    5.5 Performance Objectives ........................................................................................................ 211 

    5.6 Performance Standards ........................................................................................................ 211 

    5.7 Measurement Criteria ........................................................................................................... 212 

    6.0 Environmental Risk Assessment, Performance Objectives, Standards, andMeasurement Criteria .................................................................................................... 213 

    6.1 Physical Presence of Infrastructure ...................................................................................... 213 

    6.2 Vessel Movements ................................................................................................................ 218 

    6.3 Benthic Disturbance .............................................................................................................. 222 

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    Offshore Feed Gas Pipeline Installation Management PlanRevision Date: 10 June 2014

    Revision: 4

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    6.4 Atmospheric Emissions .........................................................................................................232 

    6.5 Light Emissions .....................................................................................................................235 

    6.6 Underwater Noise .................................................................................................................239 

    6.7 Non-Indigenous Species and Marine Pests ..........................................................................243 

    6.8 Hazardous and Non-hazardous Solid Waste ........................................................................247 

    6.9 Hazardous and Non-hazardous Liquid Waste and Planned Discharges ..............................250 

    6.10 Hydrocarbon and Chemical Spills .........................................................................................275 

    7.0 Implementation Strategy ..............................................................................................................325 

    7.1 Environmental Policy .............................................................................................................325 

    7.2 Environmental Management Documentation ........................................................................327 

    7.3 Chain of Command ...............................................................................................................328 

    7.4 Roles and Responsibilities ....................................................................................................329 

    7.5 Training and Competencies ..................................................................................................330 

    7.6 Compliance Assurance .........................................................................................................331 

    7.7 Environmental Survey and Monitoring ..................................................................................332 

    7.8 Routine Monitoring and Reporting ........................................................................................333 

    7.9 Incident Reporting .................................................................................................................336 

    7.10 Emergency Response ...........................................................................................................339 

    7.11 Control of Documentation and Records ................................................................................339 

    7.12 Review of the Plan ................................................................................................................340 

    8.0 References .....................................................................................................................................341 

    Appendix 1 Compliance Table ..........................................................................................................359 

    Appendix 2 Chemical Selection Process Summary .......................................................................368 

    Appendix 3 Stakeholder Consultation Plan .....................................................................................380 

    List of Tables

    Table 1-1 General Requirements of this Plan ........................................................................................... 31 

    Table 1-2 Requirements in State Waters .................................................................................................. 32 

    Table 1-3 Requirements in Commonwealth Waters .................................................................................. 34 

    Table 1-4 Requirements of the Offshore Petroleum and Greenhouse Gas Storage (Environment)Regulations 2009 .................................................................................................................. 35 

    Table 1-5 Requirements of the Petroleum (Submerged Lands) (Environment) Regulations 2012........... 38 

    Table 2-1 Key Commonwealth Legislative Requirements .........................................................................49 

    Table 2-2 Key State Legislative Requirements ......................................................................................... 51 

    Table 2-3 International Agreeements and Conventions ............................................................................ 52 

    Table 3-1 Subsea Infrastructure Footprints ............................................................................................... 60 

    Table 3-2 Estimated Dewatering Volumes and Timing ............................................................................. 68 

    Table 3-3 Construction Vessel Spread ...................................................................................................... 71 

    Table 3-4 Potential Credible Spill Scenarios ............................................................................................. 77 

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    Revision Date: 10 June 2014Offshore Feed Gas Pipeline Installation Management Plan

    Revision: 4

    © Chevron Australia Pty Ltd Public Page viiPrinted Date: 14 July 2014 Uncontrolled when Printed 

    Table 3-5 Summary of the Modelled Release Sites .................................................................................. 82 

    Table 3-6 Properties of Typical Diesel ...................................................................................................... 85 

    Table 3-7 Properties of Typical Heavy Fuel Oil ......................................................................................... 86 

    Table 3-8 Surface Thickness Threshold Values Applied as part of the Modelling Study ......................... 89 

    Table 3-9 Dissolved Aromatic In-water Threshold Values Applied as Part of the Modelling Study .......... 90 

    Table 3-10 Entrained Threshold Values Applied as part of the Modelling Study ...................................... 91 

    Table 3-11 Summary of Model Settings used for Spill Modelling ............................................................. 93 

    Table 3-12 Explanation of Diesel Scenario Modelling Maps ..................................................................... 94 

    Table 3-13 Summary of Predicted Shoreline Contact Probability for any Coastline ............................... 102 

    Table 3-14 Summary of Predicted Probability of Shoreline Contact to Specific Key Locations, fromSite 1 (Nearshore) .............................................................................................................. 103

     

    Table 3-15 Explanation of Modelling Maps ............................................................................................. 108 

    Table 3-16 Summary of Predicted Shoreline Contact of HFO Nearshore Spill to any Shoreline ........... 111 

    Table 3-17 Summary of Predicted Probability of HFO Shoreline Contact to Specific Location, fromNearshore ........................................................................................................................... 112 

    Table 3-18 Summary of Predicted Shoreline Contact of 800 m3 HFO Spill from Jansz MPTS to anyShoreline ............................................................................................................................ 114 

    Table 3-19 Summary of Predicted Shoreline Contact of 800 m3 HFO Spill from Gorgon MPTS to

    any Shoreline ...................................................................................................................... 114 

    Table 3-20 Summary of Predicted Shoreline Contact Probability from 800 m3 HFO Release for any

    Coastline from Site A (19.5 km from Barrow Island) .......................................................... 115 

    Table 3-21 Summary of Predicted Shoreline Contact Probability from 800 m3 HFO release for any

    Coastline from Site B (39.1 km from Barrow Island) .......................................................... 115 

    Table 3-22 Justification of Non-credible Scenarios ................................................................................. 122 

    Table 4-1 Description of EMBA Areas ..................................................................................................... 124 

    Table 4-2 Key Documents Characterising Baseline Environmental State .............................................. 128 

    Table 4-3 Areas of Conservation Significance within the EMBA............................................................. 132 

    Table 4-4 Key Ecological Features within the EMBA .............................................................................. 134 

    Table 4-5 Coral Reef Habitat by EMBA Areas ........................................................................................ 152 

    Table 4-6 Seagrass and Macroalgae Habitat by EMBA Areas ............................................................... 153 

    Table 4-7 Soft-Substrate Habitat by EMBA Areas .................................................................................. 155 

    Table 4-8 Benthic Macroinvertebrates by EMBA Areas .......................................................................... 158 

    Table 4-9 Mangrove Habitat by EMBA Areas ......................................................................................... 159 

    Table 4-10 Salt Marsh/Flat Habitat by EMBA Areas ............................................................................... 161 

    Table 4-11 Intertidal Mudflat Habitat by EMBA Areas ............................................................................. 161 

    Table 4-12 Intertidal Sandbar and Shoal Habitat by EMBA Areas ......................................................... 162 

    Table 4-13 Intertidal Rock Pavement and Rocky Shore Habitat by EMBA Areas .................................. 163 

    Table 4-14 Dugong Habitat by EMBA Areas ........................................................................................... 164 

    Table 4-15 Whales Likely to be in the Vicinity of the Proposed Installation Area ................................... 166 

    Table 4-16 Whale Habitat by EMBA Areas ............................................................................................. 169 

    Table 4-17 Dolphins Likely to be in the Vicinity of the Proposed Installation Area ................................. 170 

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    Table 4-18 Dolphin Habitat by EMBA Areas ...........................................................................................171 

    Table 4-19 Sea Snake Habitat by EMBA Areas ......................................................................................173 

    Table 4-20 Marine Turtles Likely to be in the Vicinity of the Proposed Installation Area ........................174 

    Table 4-21 Marine Turtle Habitat by EMBA Areas ..................................................................................175 

    Table 4-22 Protected Sharks Likely to be in the Vicinity of the Proposed Installation Area ....................179 

    Table 4-23 Fish and Shark Habitat by EMBA Areas ...............................................................................180 

    Table 4-24 Protected Seabirds Likely to be in the Vicinity of the Proposed Installation Area.................181 

    Table 4-25 Seabird Habitat by EMBA Areas ...........................................................................................183 

    Table 4-26 Significant Infrastructure by EMBA Areas .............................................................................186 

    Table 4-27 Summary of Commonwealth Managed Fisheries Intersecting the Pipeline ConstructionCorridor ...............................................................................................................................191 

    Table 4-28 Summary of State Managed Fisheries Intersecting the EMBA .............................................192 

    Table 4-29 Aquaculture Values by EMBA Areas .....................................................................................196 

    Table 4-30 Marine-Based Tourism and Recreation Values by EMBA Areas ..........................................197 

    Table 4-31 DAA Listed Heritage Sites by EMBA Area ............................................................................200 

    Table 4-32 Australian National Shipwreck Database Search by EMBA Areas .......................................201 

    Table 5-1 List of Key Activities and the Environmental Hazards Triggered ............................................206 

    Table 5-2 List of Key Environmental Hazards and the Receptors Potentially Impacted .........................207 

    Table 5-3 Risk Levels and Risk Tolerability1 ...........................................................................................209 

    Table 6-1 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria – PhysicalPresence of Infrastructure ..................................................................................................217 

    Table 6-2 Typical Speeds and Movements of the Installation Vessels ...................................................219 

    Table 6-3 Fishing Efforts in the Area .......................................................................................................220 

    Table 6-4 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria – VesselMovements .........................................................................................................................221 

    Table 6-5 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria – BenthicDisturbance .........................................................................................................................231 

    Table 6-6 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria – Atmospheric Emissions ......................................................................................................234 

    Table 6-7 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria – LightEmissions ...........................................................................................................................238 

    Table 6-8 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria –Underwater Noise ...............................................................................................................242

     

    Table 6-9 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria –Introduction of Invasive Marine Species .............................................................................246 

    Table 6-10 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria –SolidWaste ..................................................................................................................................248 

    Table 6-11 Chemicals Approved for Planned Discharge ........................................................................255 

    Table 6-12 Modelled Hydrotest Discharge Parameters ..........................................................................264 

    Table 6-13 Modelled Peak Concentrations, Distance to Threshold, and Dilution Rates of Hydrotest

    Water Discharge .................................................................................................................265 

    Table 6-14 Further Information Supporting ALALRP on Biocides Assessed Acceptable forDischarge ............................................................................................................................271 

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    Revision Date: 10 June 2014Offshore Feed Gas Pipeline Installation Management Plan

    Revision: 4

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    Table 6-15 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria –LiquidWaste ................................................................................................................................. 273 

    Table 6-16 Potential Credible Spill Scenarios and Risk Ranking............................................................ 278 

    Table 6-17 Potential Consequence to Shoreline Types from a Hydrocarbon Spill ................................. 284 

    Table 6-18 Potential Consequence to Marine Habitats from a Hydrocarbon Spill .................................. 288 

    Table 6-19 Potential Consequence to Marine Surface, Subsurface, and Terrestrial DwellingSpecies from a Hydrocarbon Spill ...................................................................................... 291 

    Table 6-20 Potential Consequence to Socioeconomic Receptors from a Hydrocarbon Spill ................. 297 

    Table 6-21 Evaluation of Severity of Modelled Oil Spills to Values, for each EMBA Area ..................... 303 

    Table 6-22 Potential Impact of Aspect-risk, ALARP, Objectives, Standards, and Criteria –Hydrocarbon and Chemical Spills ...................................................................................... 322 

    Table 7-1 Environmental Training ........................................................................................................... 331 

    Table 7-2 Emissions, Discharges, and Wastes Monitoring Requirements ............................................. 334 

    Table 7-3 Summary of Routine External Reporting Requirements ......................................................... 335 

    Table 7-4 Incident Reporting Requirements ............................................................................................ 337 

    List of Figures

    Figure 1-1 Location of the Greater Gorgon Area ...................................................................................... 26 

    Figure 1-2 Location of the Gorgon Gas Development and Jansz Feed Gas Pipeline .............................. 27 

    Figure 1-3 Hierarchy of Gorgon Gas Development Environmental Documentation ................................. 43 

    Figure 1-4 Hierarchy of Jansz Feed Gas Pipeline Environmental Documentation ................................... 44 

    Figure 1-5 Deliverable Development, Review, and Approval Flow Chart ................................................. 48 

    Figure 3-1 Estimated Activity Schedule ..................................................................................................... 55 

    Figure 3-2 Offshore Subsea Facilities Overview ....................................................................................... 56 

    Figure 3-3 Marine Disturbance Footprint Associated with the Installation Activities ................................. 59 

    Figure 3-4 Gorgon and Jansz Pipeline Route ........................................................................................... 61 

    Figure 3-5 Proposed Anchor Locations in State Waters for Diving Operations ........................................ 74 

    Figure 3-6 Location of Modelled Release Sites ........................................................................................ 84 

    Figure 3-7 Predicted Weathering Graph: Diesel Fuel Oil .......................................................................... 86 

    Figure 3-8 Predicted Weathering Graph: Heavy Fuel Oil .......................................................................... 88 

    Figure 3-9 Modelling of 700 m3 Surface Release of Diesel at Site 1 (Nearshore) Across All Seasons .... 95 

    Figure 3-10 Modelling of 700 m3 Surface Release of Diesel at Gorgon and Jansz MPTS (Open

    Ocean) Across All Seasons .................................................................................................. 96 

    Figure 3-11 Modelling of Zones of Entrained Exposure from 700 m3 Surface Release of Diesel at

    Site 1 (Nearshore) ................................................................................................................ 98 

    Figure 3-12 Modelling of Zones of Entrained Exposure from 700 m3 Surface Release of Diesel atGorgon and Jansz MPTS (Open Ocean) ............................................................................. 99 

    Figure 3-13 Modelling of Zones of Dissolved Aromatics Exposure from 700 m3 Surface Release of

    Diesel at Gorgon and Jansz MPTS (Open Ocean) and Site 1 (Nearshore) ...................... 101 

    Figure 3-14 Predicted Movement of an Oil Spill at 4 hours, 2, 4, and 6 days after the Initial Release(3:00 am 5 May 2008) for the Worst-case Single Spill Trajectory ...................................... 106 

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    Revision: 4

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    Figure 3-15 Predicted Weathering and Fates Graph, as a Function of Percentage, for the SelectedSingle Spill Trajectory chosen from the Worst-case Simulation from Nearshore ..............107

     

    Figure 3-16 Predicted Weathering and Fates Graph, as a Function of Percentage, for the SelectedSingle Spill Trajectory chosen from the Worst-case Simulation from Open Ocean ...........107 

    Figure 3-17 Modelling of 800 m3 Surface Release of HFO at Site 2 (Nearshore) Across All Seasons ..109 

    Figure 3-18 Modelling of 800 m3 Surface Release of HFO at Gorgon and Jansz MPTS (OpenOcean) Across All Seasons ................................................................................................110 

    Figure 3-19 Modelling of 800 m3 Surface Release of HFO from Site A Across All Seasons ..................116 

    Figure 3-20 Modelling of 800 m3 Surface Release of HFO from Site B Across All Seasons ..................117 

    Figure 3-21 Predicted Movement of an Oil Spill at 3, 6, 12, and 24 Hours after the Initial Release(3:00 pm 12 February 2009) for the Worst-case Single Spill Trajectory ............................118 

    Figure 3-22 Predicted Weathering and Fates Graph, as a Function of Percentage, for the SelectedSingle Spill Trajectory chosen from the Worst-case Simulation, from Nearshore .............119 

    Figure 3-23 Predicted Weathering and Fates Graph, as a Function of Percentage, for the SelectedSingle Spill Trajectory chosen from the Worst-case Simulation, from Gorgon MPTS .......120 

    Figure 3-24 Predicted Weathering and Fates Graph, as a Function of Percentage, for the SelectedSingle Spill Trajectory chosen from the Worst-case Simulation, from Jansz MPTS ..........121 

    Figure 4-1 EMBA Areas ...........................................................................................................................127 

    Figure 4-2 Montebello–Barrow Island Marine Conservation Reserves ...................................................131 

    Figure 4-3 Key Ecological Features of the North-west Marine Region ...................................................135 

    Figure 4-4 Seasonally Averaged Winds in the North-west Marine Region .............................................137 

    Figure 4-5 Surface and Subsurface Currents in the Region ...................................................................139 

    Figure 4-6 Seabed Profile along the Jansz Pipeline Route .....................................................................142 

    Figure 4-7 Matters of National Environmental Significance Search Area, as indicated by SpillModelling ............................................................................................................................145 

    Figure 4-8 Dominant Ecological Elements in the Vicinity of the Offshore Feed Gas Pipeline Systemin State Waters ...................................................................................................................148 

    Figure 4-9 Dominant Ecological Elements in the Vicinity of the Offshore Feed Gas Pipeline Systemin Commonwealth Waters ..................................................................................................149 

    Figure 4-10 Benthic Habitat at the Gully Region .....................................................................................150 

    Figure 4-11 Benthic Habitat at the Scarp Region ....................................................................................151 

    Figure 4-12 Humpback Whale Migration Route ......................................................................................168 

    Figure 4-13 Significant Infrastructure by EMBA Area ..............................................................................186 

    Figure 4-14 Petroleum Activities in the North West Shelf .......................................................................188 

    Figure 4-15 Shipping Lanes in the Region ..............................................................................................190 

    Figure 4-16 Tourism Hotspots in the North-west of WA ..........................................................................199 

    Figure 4-17 Known Historic Shipwrecks in the Vicinity of the Greater EMBA Area ................................203 

    Figure 5-1 Chevron Integrated Risk Prioritization Matrix .........................................................................208 

    Figure 5-2 Risk-related Decision Support Framework ............................................................................210 

    Figure 6-1 Inner Reef Environmental Features – Pipeline Route Survey ...............................................227 

    Figure 6-2 Outer Reef Environmental Features – Pipeline Route Survey ..............................................228 

    Figure 6-3 Chemical Selection Process Flow Diagram ............................................................................254 

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    Revision Date: 10 June 2014Offshore Feed Gas Pipeline Installation Management Plan

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    Figure 6-4 Maximum Predicted Biocide Concentrations (ppm) from Gorgon MPTS Discharge Point(based on 25 simulations) .................................................................................................. 266 

    Figure 6-5 Maximum Predicted Biocide Concentrations (ppm) from Jansz MPTS Discharge Point(based on 25 simulations) .................................................................................................. 267 

    Figure 6-6 Zones of Exposure of Ecological Receptors to Marine Oil Spills ........................................... 283 

    Figure 7-1 ABU Policy 530 ...................................................................................................................... 326 

    Figure 7-2 Organisation Structure ........................................................................................................... 328 

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    Terminology, Definitions, and Abbreviations

    Terms, definitions, and abbreviations used in this document are listed below. These align withthe terms, definitions, and abbreviations defined in Schedule 2 of the Western AustralianGorgon Gas Development and Jansz Feed Gas Pipeline Ministerial Implementation StatementsNo. 800 and No. 769 respectively (Statement No. 800 and 769) and the Commonwealth Gorgon

    Gas Development and Jansz Feed Gas Pipeline Ministerial Approvals (EPBC Reference:2003/1294, 2008/4178, and 2005/2184).

    µm micrometre

     ABU Australasia Business Unit

     AFMA Australian Fisheries Management Authority

     AFZ Australian Fishing Zone

     ALARP As Low As Reasonably Practicable. Includes concept of ‘as far aspracticable’ as defined by Ministerial Statement No. 800 and EPBCStatements Approval Statements 2003/1294, 2005/2184 and 2008/4178,and associated commitments.

     AMSA Australian Maritime Safety Authority

     ANZECC Australian and New Zealand Environment Conservation Council

     APASA Asia-Pacific Applied Science Associates

     APPEA Australian Petroleum Production and Exploration Association

     AQIS Australian Quarantine and Inspection Service

     ARI Assessment on Referral Information (for the proposed Jansz Feed GasPipeline dated September 2007) as amended or supplemented from timeto time

     ARMCANZ Agriculture and Resource Management Council of Australia and NewZealand

     AS Australian Standard

     AS/NZS Australian Standard/New Zealand Standard

     ASBU Australasia Strategic Business Unit

     At risk Being at risk of Material Environmental Harm or Serious EnvironmentalHarm and/or, for the purposes of the EPBC Act relevant listed threatenedspecies, threatened ecological communities and listed migratory speciesat risk of Material Environmental Harm or Serious Environmental Harm.

     AUSREP Australian Ship Reporting

    Ballast Water Any water and associated sediment used to trim and stabilise a vessel

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    Benthic Living upon or in the sea floor

    Berm A narrow ledge or shelf typically at the top or bottom of a slope

    Bioaccumulation The accumulation of a substance, such as a toxic chemical, in various

    tissues of a living organism

    Biocide Any substance that can destroy living organisms

    Biofouling Aquatic organisms attached on or in a hull, including the internal seawaterpipe work, anchor well, cable locker, bilges, etc.

    Bioturbation The displacement and mixing of sediment particles by benthic fauna(animals) or flora (plants)

    Bombora Raised, dome-shaped, limestone feature, >1 m high, often formed bycoral of the genus Porites

    BTEX Benzene, toluene, ethylbenzene, and xylene compounds

    Bund An area of containment that is provided to retain liquid

    CALM Former Western Australia Department of Conservation and LandManagement (now Western Australian Department of Parks and Wildlife[DPaW]; was DEC)

    CAMBA China–Australia Migratory Bird Agreement

    Carbon Dioxide(CO2) InjectionSystem

    The mechanical components required to be constructed to enable theinjection of reservoir carbon dioxide, including but not limited tocompressors, pipelines and wells.

    Caution zone An area around the cetacean with a radius of 150 m for a dolphin and300 m for a whale

    CDU Control Distribution Unit

    Cefas United Kingdom Centre for Environment, Fisheries and AquacultureScience

    Cetacean Various aquatic (mainly marine) mammals of the order Cetacea,(including whales, dolphins and porpoises) characterised by a nearlyhairless body, front limbs modified into broad flippers and a flat notchedtail.

    CHARM Chemical Hazard and Risk Management

    Chevron Australia Chevron Australia Pty Ltd

    Chevron Permit Areas

    Petroleum leases of which Chevron Australia is the title holder and/oroperator.

    CO Carbon monoxide

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    CO2  Carbon dioxide

    CommonwealthMarine Areas

    Zoned areas of waters of the sea, the seabed and the airspace above thewaters of the sea, defined under section 24 of the EPBC Act (Cth).

    CommonwealthWaters

    Waters stretching from three to 300 nautical miles from the Australiancoast

    ConstructionCorridor

    Construction corridor in Commonwealth Waters. The width of the pipelineinstallation corridor for the Gorgon and Jansz offshore pipelines inCommonwealth Waters will be nominally 200 m, varying in width alongthe length of the corridor to allow for construction of the pipeline withconsideration to subsea features and operational constraints.

    Coral Assemblages Benthic areas (minimum 10 m2) or raised seabed features over which theaverage live coral cover is equal to or greater than 10%.

    cP Centipoise (unit of viscosity)

    CRA Corrosion Resistant Alloys

    CSIRO Commonwealth Scientific and Industrial Research Organisation

    Cth Commonwealth of Australia

    DAA Western Australian Department of Aboriginal Affairs

    dB Decibel; a unit of sound

    dB re 1 μPa Decibels relative to one micro pascal; the unit used to measure theintensity of an underwater sound

    DBT Dibutyltin

    DC Drill Centre

    DEC Former Western Australian Department of Environment and Conservation(now DPaW)

    DEWHA Former Commonwealth Department of the Environment, Water, Heritage

    and the Arts (now Department of the Environment [DotE]; was SEWPaC)

    DMP Western Australian Department of Mines and Petroleum (formerlyWestern Australia Department of Industry and Resources)

    DoF Western Australian Department of Fisheries

    DoT Western Australian Department of Transport

    DotE Commonwealth Department of the Environment (formerly SEWPaC andDEWHA)

    DP Dynamic Positioning, a computer-controlled system to automaticallymaintain a vessel’s position and heading by using its propellers andthrusters

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    DPaW Western Australian Department of Parks and Wildlife (formerly DEC)

    DRET Commonwealth Department of Resources, Energy and Tourism

    EC50  The concentration of a drug at which 50% of its maximum response is

    observed

    EGPMF Exmouth Gulf Prawn Managed Fishery

    EHU Electro-hydraulic Umbilical

    EIS/ERMP Environmental Impact Statement/Environmental Review andManagement Programme (for the Proposed Gorgon Gas Developmentdated September 2005) as amended or supplemented from time to time.

    EMBA Environment that may be affected

    EMP Environmental Management Plan

    EnvironmentalHarm

    Has the meaning given by Part 3A of the Environmental Protection Act1986 (WA).

    EP Environment Plan

    EP Act Western Australian Environmental Protection Act 1986 

    EPA Western Australian Environmental Protection Authority

    EPBC Act Commonwealth Environment Protection and Biodiversity Conservation Act 1999 

    EPBC Reference:2003/1294

    Commonwealth Ministerial Approval (for the Gorgon Gas Development)as amended or replaced from time to time.

    EPBC Reference:2005/2184

    Commonwealth Ministerial Approval (for the Jansz Feed Gas Pipeline) asamended or replaced from time to time.

    EPBC Reference:2008/4178

    Commonwealth Ministerial Approval (for the Revised Gorgon GasDevelopment) as amended or replaced from time to time.

    EPCM Engineering, Procurement and Construction Management

    Epifauna Invertebrates that attach themselves to rocky reefs or to the sea floor;includes hydroids, sea pens, small bryozoans and sponges

    Fall-pipe A tubular construction with a length adjustable to the working depth andfrom which material is discharged only a few metres above the seabed

    FCGT Flooding, cleaning, gauging and testing

    Free-span Section where the pipeline is suspended (not supported)

    FTU Formazin Turbidity Unit, which is identical to the Nephelometric TurbidityUnit (NTU)

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    g Gram

    Gas TreatmentPlant

    The LNG plant, any domestic gas plant and associated processing andexport facilities and infrastructure, and associated ancillary and supportfacilities and infrastructure to be constructed in phases and located fromtime to time on the Gas Treatment Plant Lease or Leases, excluding theExport Jetty and MOF.

    GHG Greenhouse Gas

    Gorgon GasDevelopment

    The Gorgon Gas Development as approved under Statement No. 800and EPBC Reference: 2003/1294 and 2008/4178 as amended orreplaced from time to time.

    GT Gross tonnes

    GUFT Gorgon Upstream Facilities Team

    h Hour

    H2S Hydrogen sulfide

    ha Hectare

    HDD Horizontal Directional Drilling

    HDDMMP Horizontal Directional Drilling Management and Monitoring Plan

    HES Health, Environment, and Safety

    HFO Heavy Fuel Oil

    HMAAF Hazardous Material Approval Application Form

    Hydrocarbons A large class of organic compounds composed of hydrogen and carbon.Crude oil, natural gas, and natural gas condensate are all mixtures ofvarious hydrocarbons.

    Hydrophilicity Having an affinity for water; readily absorbing or dissolving in water.

    Hydrotest Method whereby water is pressurised within pipes and vessels to detectleaks

    Hz Hertz or cycles per second. Something that repeats a cycle once eachsecond moves at a rate of 1 Hz.

    IMCRA Integrated Marine and Coastal Regionalisation of Australia

    IMDG International Maritime Dangerous Goods

    IMO International Maritime Organization

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    Infauna Benthic fauna (animals) living in the substrate and especially in a soft seabottom.

    IOPP International Oil Pollution Prevention

    IPIECA International Petroleum Industry Environmental Conservation Association

    ISO International Organization for Standardization

    ISPP International Sewage Pollution Prevention

    ISQG Interim Sediment Quality Guideline

    IUCN International Union for Conservation of Nature

    JAMBA Japan–Australia Migratory Bird Agreement

    Jansz Feed GasPipeline

    The Jansz Feed Gas Pipeline as approved in Statement No. 769 andEPBC Reference: 2005/2184 as amended or replaced from time to time.

    JHA Job Hazard Analysis

    kg Kilogram

    kHz Kilohertz

    KJVG Kellogg Joint Venture Gorgon

    km Kilometre

    L Litre

    LC50  Lethal Concentration (LC). LC50  is the concentration of a chemical kills50% of the test animals during the observation period.

    LD50  Lethal Dose (LD). LD50  is the amount of a material, given all at once,which causes the death of 50% (one half) of a group of test animals.

    LNG Liquefied Natural Gas

    Log KoW Logarithm of the octanol-water partitioning coefficient; indicates an affinityfor lipids and can usually be used to predict the potential forbioaccumulation

    LOR Limit of reporting. Defined as the minimum concentration of a residueused for reporting purposes.

    LPG Liquefied Petroleum Gas

    LTMTMP Long-term Marine Turtle Management Plan

    m Metre

    m/m Concentration of a solution by mass

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    m/s Metres per second

    M1, M2, etc. Gorgon drill centres

    m2  Square metre

    m3  Cubic metre

    Macroinvertebrate An invertebrate animal (an animal without a backbone [vertebral column])large enough to be seen without the aid of magnification; includessponges, crinoids, hydroids, sea pens, sea whips, gorgonians, snails,clams, crayfish, and sea cucumbers.

    Manifold An arrangement of piping and valves designed to commingle productionfluid flow

    Marine Disturbance

    Footprint

    The area of the seabed to be disturbed by construction or operations

    activities associated with the Marine Facilities listed in Condition 14.3 ofStatement No. 800, Condition 12.3 of Statement No. 769 andCondition 11.3 in EPBC Reference: 2003/1294 and 2008/4178 (exceptingthat area of the seabed to be disturbed by the generation of turbidity andsedimentation from dredging and dredge spoil disposal) as set out in theCoastal and Marine Baseline State Report required under Condition 14.2of Statement No. 800, Condition 12.2 of Statement No. 769 andCondition 11.2 of EPBC Reference: 2003/1294 and 2008/4178. WithinState Waters only.

    Marine Facilities In relation to Statement No. 800 and EPBC Reference: 2003/1294 and2008/4178, the Marine Facilities are the:

      Materials Offloading Facility (MOF)

      LNG Jetty

      Dredge Spoil Disposal Ground

      Offshore Feed Gas Pipeline System and marine component of theshore crossing

      Domestic Gas Pipeline

    For the purposes of Statement No. 800, Marine Facilities also include:

      Marine upgrade of the existing WAPET landing.In relation to Statement No. 769, Marine Facilities are the Offshore FeedGas Pipeline System and marine component of the shore crossing.

    MARPOL The International Convention for the Prevention of Pollution From Ships,1973 as modified by the Protocol of 1978.

     Also known as MARPOL 73/78.

    MaterialEnvironmentalHarm

    Environmental Harm that is neither trivial nor negligible.

    MBT Monobutyltin

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    MDF See Marine Disturbance Footprint

    MEG Monoethylene glycol

    Metocean Meteorological and oceanographic conditions

    MFO Marine Fauna Observer

    mg Milligram

    MHHW Mean High High Water, the mean of the higher of the two daily highwaters over a period of time (preferably 19 years). Applicable in mixedand diurnal waters.

    MHWS Mean high water spring. The highest level that spring tides reach on theaverage over a period of time.

    MLWN Mean low water neaps. The average height of the low waters of neaptides above chart datum.

    mm Millimetre

    MPTS Midline Pipeline Termination Structure

    MSDS Material Safety Data Sheet. A widely used system for cataloguinginformation on substances, such as chemicals, chemical compounds, andchemical mixtures. MSDS information may include instructions for thesafe use and potential hazards associated with a particular material or

    product.

    MSL Mean sea level. The sea level halfway between the mean levels of highand low water.

    MTPA Million Tonnes Per Annum

    MW Megawatt

    N/A Not Applicable

    N1K The route option selected for the Jansz pipelines

    NBPMF Nickol Bay Prawn Managed Fishery

    NCWHA Ningaloo Coast World Heritage Area

    NEBA Net Environmental Benefit Analysis

    NEPM National Environmental Protection Measure

    NES [Matters of] National Environmental Significance, as defined in Part 3,Division 1 of the EPBC Act (Cth).

    NH3-N Ammonia nitrogen

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    NIS Non-indigenous Species

    nm Nautical miles

    NOEC No Observable Effect Concentration

    NOPSEMA National Offshore Petroleum Safety and Environmental Management Authority

    NOx  Nitrogen oxides (NO and NO2)

    NOx-N Nitrogen oxides nitrogen trace gas emission ratio

    NSW New South Wales

    NTU Nephelometric Turbidity Unit, which is identical to FTU

    NVCA National Conservation Values Atlas

    NWS North West Shelf

    OCNS Offshore Chemical Notification Scheme

    ODS Ozone Depleting Substance

    OE Operational Excellence

    OEMS Operational Excellence Management System

    OEPA Office of the (Western Australian) Environmental Protection Authority

    OPGSS Offshore Petroleum and Greenhouse Gas Storage

    OPMF Onslow Prawn Managed Fishery

    OSMP (Spill) Operational and Scientific Monitoring Plan

    OSORP Oil Spill Operation Response Plan

    OSPAR Oslo/Paris Convention

    P&A Plugged and Abandoned

    PAH Polycyclic aromatic hydrocarbons / Poly-aromatic hydrocarbons

    PBT Persistence, Bioaccumulative, and Toxicity Risk assessment methodrelating to Environmental Harm

    PER Public Environmental Review for the Gorgon Gas Development Revisedand Expanded Proposal dated September 2008, as amended orsupplemented from time to time.

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    PerformanceStandards

     Are matters which are developed for assessing performance, notcompliance, and are quantitative targets or where that is demonstrated tobe not practicable, qualitative targets, against which progress towardsachievement of the objectives of conditions can be measured.

    Photic Zone The depth of the water in a lake or ocean that is exposed to sufficientsunlight for photosynthesis to occur. The depth of the photic zone can begreatly affected by turbidity.

    Pig A device that is inserted into and travels the length of a pipeline, driven byvariety of fluids including compressed air, nitrogen, water, etc.

    Pigging The act of driving a device called a pig through a pipeline for thepurposes of displacing or separating fluids, and cleaning or inspecting theline

    PLET Pipeline End Terminations

    PLONOR Pose Little or No Risk (to the environment)

    Poppet Mechanical hydraulic coupler

    POWBONS Pollution of Waters by Oil and Noxious Substances

    ppb Parts per billion

    ppm Parts per million

    Practicable Practicable means reasonably practicable having regard to, among otherthings, local conditions and circumstances (including costs) and to thecurrent state of technical knowledge.

    PTS Pipeline Termination Structure

    QMS Quarantine Management System

    Reference Site Specific areas of the environment that are not at risk of being affected bythe proposal or existing developments, that can be used to determine thenatural state, including natural variability, of environmental attributes suchas coral health or water quality.

    rms Root Mean Square; a statistical measure of the magnitude of a varyingquantity

    RO Reverse Osmosis

    ROV Remotely Operated Vehicle

    Scupper An opening in the side of a ship at or just below the level of the deck, toallow water to run off.

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    SeriousEnvironmentalHarm

    Environmental harm that is:

    a) irreversible, of a high impact or on a wide scale; or

    b) significant or in an area of high conservation value or specialsignificance and is neither trivial nor negligible.

    SEWPaC Former Commonwealth Department of Sustainability, Environment,Water, Population and Communities (now DotE; was DEWHA)

    SIMAP Spill Impact Mapping and Analysis Program

    SIMOPS Simultaneous Operations

    Sn/kg Tin per kilogram

    SOPEP Shipboard Oil Pollution Emergency Plan

    SOx Sulfur oxides

    Spool A short length of pipe typically used to tie in a pipeline to a structure andtypically designed as a pipeline expansion joint

    State Waters The marine environment within three nautical miles of the coast of BarrowIsland or the mainland of Western Australia.

    Statement No. 748 Western Australian Ministerial Implementation Statement No. 748 (for theGorgon Gas Development) as amended from time to time [superseded byStatement No. 800].

    Statement No. 769 Western Australian Ministerial Implementation Statement No. 769 (for theJansz Feed Gas Pipeline) as amended from time to time.

    Statement No. 800 Western Australian Ministerial Implementation Statement No. 800 (for theGorgon Gas Development) as amended from time to time.

    Statement No. 865 Western Australian Ministerial Implementation Statement No. 865 (for theGorgon Gas Development) as amended from time to time.

    STCW Standards of Training, Certification, and Watchkeeping

    Stinger A steel structure protruding from the end of an offshore pipe-lay vesselused to provide additional support at the overbend

    Stochastic Random

    Substrate The surface a plant or animal lives upon. The substrate can include bioticor abiotic materials. For example, encrusting algae that lives on a rockcan be substrate for another animal that lives above the algae on therock.

    TAPL Texaco Australia Pty. Ltd.

    TAPM The Air Pollution Model, developed by CSIRO

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    Taxon (plural: taxa) A taxon (plural taxa), or taxonomic unit, is a name designating anorganism or a group of organisms.

    TBT Tributyltin

    THPO Trishydroxymethylphosphine oxide

    THPS Tetrakis-hydroxymethyl-phosphonium-sulfate

    TIC Total Inorganic Carbon

    TKN Total Kjeldahl nitrogen

    TOC Total Organic Carbon

    Topsides All parts of a vessel that are not regularly immersed or wetted with seawater during normal operation

    TPH Total petroleum hydrocarbons

    Transect The path along which a researcher moves, counts, and recordsobservations.

    Turbidity The cloudiness or haziness of a fluid caused by individual particles(suspended solids) that are generally invisible to the naked eye, similar tosmoke in air. The measurement of turbidity is a key test of water quality.

    Umbilical A control line that provides hydraulic or electrical control and chemical

    injection support to subsea facilities

    UMCA Umbilical Midline Connection Assembly

    UNEP United Nations Environment Program

    UTA Umbilical Termination Assembly

    VOC Volatile Organic Compound

    WA Western Australia

    WAF Water accommodated fraction.

    WatersSurroundingBarrow Island

    Refers to the waters of the Barrow Island Marine Park and Barrow IslandMarine Management Area (approximately 4169 ha and 114 693 harespectively) as well as the port of Barrow Island representing the PilbaraOffshore Marine Bioregion, which is dominated by tropical species thatare biologically connected to more northern areas by the Leeuwin Currentand the Indonesian Throughflow, resulting in a diverse marine biota istypical of the Indo–West Pacific flora and fauna.

    Wet buckle A buckle that leads to localised collapse of a pipeline, which in turnresults in fracturing of the pipeline wall, allowing sea water to flood thepipeline

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    Wetsides All parts of a vessel that are regularly immersed or wetted with sea waterduring normal operation

    WISER Wireless Information System for Emergency Responders (United States)

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    1.0 Introduction

    1.1 Proponent

    Chevron Australia Pty Ltd (Chevron Australia) is the proponent and the person taking the actionfor the Gorgon Gas Development on behalf of the following companies (collectively known asthe Gorgon Joint Venturers):

      Chevron Australia Pty Ltd

      Chevron (TAPL) Pty Ltd

      Shell Development (Australia) Pty Ltd

      Mobil Australia Resources Company Pty Limited

      Osaka Gas Gorgon Pty Ltd

      Tokyo Gas Gorgon Pty Ltd

      Chubu Electric Power Gorgon Pty Ltd

    pursuant to Statement No. 800 and EPBC Reference: 2003/1294 and 2008/4178.

    Chevron Australia is also the proponent and the person taking the action for the Jansz FeedGas Pipeline on behalf of the Gorgon Joint Venturers, pursuant to Statement No. 769, andEPBC Reference: 2005/2184.

    1.2 Project

    Chevron Australia proposes to develop the gas reserves of the Greater Gorgon Area (Figure1-1).

    Subsea gathering systems and subsea pipelines will be installed to deliver feed gas from theGorgon and Jansz–Io gas fields to the west coast of Barrow Island. The feed gas pipelinesystem will be buried as it traverses from the west coast to the east coast of the Island wherethe system will tie in to the Gas Treatment Plant located at Town Point. The Gas TreatmentPlant will comprise three Liquefied Natural Gas (LNG) trains capable of producing a nominalcapacity of five Million Tonnes Per Annum (MTPA) per train. The Gas Treatment Plant will alsoproduce condensate and domestic gas. Carbon dioxide (CO2), which occurs naturally in thefeed gas, will be separated during the production process. As part of the Gorgon GasDevelopment, Chevron Australia will inject the separated CO2  into deep formations belowBarrow Island. The LNG and condensate will be loaded from a dedicated jetty offshore fromTown Point and then transported by dedicated carriers to international markets. Gas for

    domestic use will be exported by a pipeline from Town Point to the domestic gas collection anddistribution network on the mainland (Figure 1-2).

    1.3 Location Summary

    The Gorgon gas field is located approximately 130 km and the Jansz–Io field approximately200 km off the north-west coast of Western Australia. Barrow Island is located off the Pilbaracoast 85 km north-north-east of the town of Onslow and 140 km west of Karratha. Pipelineinstallation activity will take place along corridors between Barrow Island and the Gorgon andJansz gas fields as indicated in Figure 1-1 and Figure 1-3. Section 3.0 contains a more detaileddescription of the activity location.

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    Figure 1-1 Location of the Greater Gorgon Area

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    Figure 1-2 Location of the Gorgon Gas Development and Jansz Feed Gas

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    1.4 Scope of this Plan

    This Plan covers the installation of the feed gas pipeline system as described in Section 3.0including:

      installation of pipelines (including trenching)

      installation of umbilicals (including trenching)

      installation of permanent stabilisation and protection for the pipelines and umbilicals (rockinstallation)

      installation and tie-in of subsea structures

      conducting pre-commissioning activities

      support activities.

    Some related activities covered by other approval documentation are not considered in detail inthe scope of this Plan, including installation, stabilisation, and pre-commissioning activitiesrelating to the following documents:

      Horizontal Directional Drilling Management and Monitoring Plan (HDDMMP; Chevron Australia 2010) – addresses terrestrial and nearshore activities associated with theHorizontal Directional Drilling (HDD) shore crossing on Barrow Island

      Onshore Gas Pipeline Installation Environmental Management Plan (Onshore EMP; Chevron Australia 2010a) – addresses terrestrial activities associated with the construction of theonshore pipeline sections and all onshore activities related to the offshore pipelineinstallation

      Jansz Feed Gas Pipeline Preparatory Works (Northern Scarp) Environment Plan (Chevron Australia 2010b) – addresses the seabed preparatory activities required prior to theinstallation of the feed gas pipelines

      Offshore Feed Gas Pipeline Prelay Activities Environment Plan (Chevron Australia 2010c) –addresses the installation of rock foundation for one of the buckle initiators on the Gorgoninfield pipeline routes.

    Note that no further approval is sought in relation to the elements of the other documentsdescribed in this Plan. References made to the other documents are provided for informationonly and for ease of interpretation where there is overlap between installation activitiesassessed within each document.

    Note that the Domestic Gas pipeline installation activity is covered under two separateministerial plans—Offshore Domestic Gas Pipeline Installation Management Plan (Chevron Australia 2012), and Mainland Onshore Domestic Gas Pipeline Environmental Management

    Plan (Chevron Australia 2011).

    1.5 Project Environmental Approvals

    The initial Gorgon Gas Development was assessed through an Environmental ImpactStatement/Environmental Review and Management Programme (EIS/ERMP) assessmentprocess (Chevron Australia 2005, 2006a).

    The initial Gorgon Gas Development was approved by the Western Australian State Minister forthe Environment on 6 September 2007 by way of Ministerial Implementation Statement No. 748(Statement No. 748) and the Commonwealth Minister for the Environment and Water

    Resources on 3 October 2007 (EPBC Reference: 2003/1294).In May 2008, under section 45C of the Western Australian Environmental Protection Act 1986 (EP Act), the Environmental Protection Authority (EPA) approved some minor changes to the

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    Gorgon Gas Development that it considered ‘not to result in a significant, detrimental,environmental effect in addition to, or different from, the effect of the original proposal’ (EPA2008). The approved changes are:

      excavation of a berthing pocket at the Barge (WAPET) Landing facility

      installation of additional communications facilities (microwave communications towers)  relocation of the seawater intake

      modification to the seismic monitoring program.

    In September 2008, Chevron Australia sought both State and Commonwealth approval througha Public Environment Review (PER) assessment process (Chevron Australia 2008a) for theRevised and Expanded Gorgon Gas Development to make some changes to ‘Key ProposalCharacteristics’ of the initial Gorgon Gas Development, as outlined below:

      addition of a five MTPA LNG train, increasing the number of LNG trains from two to three

      expansion of the CO2 Injection System, increasing the number of injection wells and surface

    drill locations  extension of the causeway and the Materials Offloading Facility (MOF) into deeper water.

    The Revised and Expanded Gorgon Gas Development was approved by the Western AustralianState Minister for the Environment on 10 August 2009 by way of Ministerial ImplementationStatement No. 800 (Statement No. 800). Statement No. 800 also superseded StatementNo. 748 as the approval for the initial Gorgon Gas Development. Statement No. 800 thereforeprovides approval for both the initial Gorgon Gas Development and the Revised and ExpandedGorgon Gas Development, which together are known as the Gorgon Gas Development. Amendments to Statement No. 800 Conditions 18, 20, and 21 under section 46 of the EP Actwere approved by the Western Australian State Minister for the Environment on 7 June 2011 byway of Ministerial Implementation Statement No. 865 (Statement No. 865). Implementation of

    the Gorgon Gas Development will therefore continue to be in accordance with StatementNo. 800, as amended by Statement No. 865.

    On 26 August 2009, the then Commonwealth Minister for the Environment, Heritage and the Arts issued approval for the Revised and Expanded Gorgon Gas Development (EPBCReference: 2008/4178) and varied the conditions for the initial Gorgon Gas Development(EPBC Reference: 2003/1294).

    Since the Revised and Expanded Gorgon Gas Development was approved, further minorchanges have also been made and/or approved to the Gorgon Gas Development and are nowalso part of the Development. Further changes may also be made/approved in the future. ThisPlan relates to any such changes, and where necessary this document will be specifically

    revised to address the impacts of those changes.The Jansz Feed Gas Pipeline was assessed via Environmental Impact Statement/Assessmenton Referral Information (ARI) and EPBC Referral assessment processes (Mobil Australia 2005,2006).

    The Jansz Feed Gas Pipeline was approved by the Western Australian State Minister for theEnvironment on 28 May 2008 by way of Ministerial Implementation Statement No. 769(Statement No. 769) and the Commonwealth Minister for the Environment and WaterResources on 22 March 2006 (EPBC Reference: 2005/2184).

    This Plan covers the Gorgon Gas Development as approved under Statement No. 800 and asapproved by EPBC Reference: 2003/1294 and EPBC Reference: 2008/4178. In addition, thisPlan covers the Jansz Feed Gas Pipeline as approved by Ministerial Implementation StatementNo. 769 and EPBC Reference: 2005/2184.

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    In respect of the Carbon Dioxide Seismic Baseline Survey Works Program, which comprises theonly works approved under Statement No. 748 before it was superseded, and under EPBCReference: 2003/1294 before the Minister approved a variation to it on 26 August 2009, notethat under Condition 1A.1 of Statement No. 800 and Condition 1.4 of EPBC Reference:2003/1294 and 2008/4178 this Program is authorised to continue for six months subject to theexisting approved plans, reports, programs and systems for the Program, and the works under

    that Program are not the subject of this Plan.

    1.6 Purpose of this Plan

    1.6.1 Legislative Requirements

    1.6.1.1 Petroleum Legislation

    This Plan is presented for approval/acceptance under the Western Australian (WA) Petroleum(Submerged Lands) Act 1982  (Petroleum (Submerged Lands) (Environment) Regulations2012), and the Commonwealth (Cth) Offshore Petroleum and Greenhouse Gas Storage Act2006 (Offshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009).

    This Plan is also required under Condition 7 of Jansz Pipeline License WA-19-PL (Cth) andTPL/21 (WA), as well as Gorgon Pipeline License WA-20-PL (Cth) and TPL/22 (WA).

    1.6.1.2 State Ministerial Conditions

    This Plan is required under Condition 23.1 of Statement No. 800, which is quoted below:

    Prior to commencement of installation of the Feed Gas Pipeline System and Domestic GasPipeline respectively, the Proponent shall submit to the Minister an Offshore Gas PipelineInstallation Management Plan (the Plan) that meets the objectives set out in Condition 23.3and the requirements of Condition 23.4, as determined by the Minister.

    This Plan is also required under Condition 14.1 of Statement No. 769, which is quoted below:

    Prior to commencement of installation of the Feed Gas Pipeline System, the Proponentshall submit to the Minister an Offshore Gas Pipeline Installation Management Plan (thePlan) that meets the objectives set out in Condition 14.3 and the requirements ofCondition 14.4, as determined by the Minister.

    1.6.1.3 Commonwealth Ministerial Conditions

    This Plan satisfies the requirements of Condition 16.1 of EPBC Reference: 2008/4178 and2003/1294 and Condition 16A.1 and 16B.1 of EPBC Reference: 2003/1294, which are quotedbelow:

    16.1) Prior to commencement of installation of the Feed Gas Pipeline System in State

    waters and Domestic Gas Pipeline respectively, the person taking the action must submit tothe Minister, for approval, an Offshore Gas Pipeline Installation Management Plan (thePlan) that meets the objectives and requirements set out in this Condition.

    16A.1) Prior to commencement of construction of Offshore facilities in Commonwealthwaters, the person taking the action must submit for the Minister’s approval a plan (orplans) for managing the impacts of the action.

    16B.1) The person taking the action must submit for the Minister’s approval, a plan or plansto address pipeline installation measures for minimising the potential for impacts on listedthreatened turtles and cetaceans during pipeline construction in Commonwealth marineareas.

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    This Plan also satisfies the requirements of Conditions 1 and 2 of EPBC Reference: 2005/2184,which are quoted below:

    1) The person taking the action must submit, for the Minister’s approval, a plan (or plans)for managing the offshore impacts of the action.

    2) The person taking the action must submit for the Minister’s approval, a plan or plans toaddress pipeline installation measures for minimising the potential for impacts on listedthreatened turtles and cetaceans during pipeline construction 

    1.6.2 Objectives

    This Plan has been prepared to ensure that the installation of the feed gas pipeline systemdescribed in Section 3.0 is conducted in a manner that protects environmental values andreduces impacts to the environment as far as practicable.

    This Plan has also been prepared to meet the relevant objectives of the above State andCommonwealth ministerial conditions; the objectives of the applicable State and Commonwealthpetroleum legislation; Petroleum (Submerged Lands) (Environment) Regulations 2012; andOffshore Petroleum and Greenhouse Gas Storage (Environment) Regulations 2009.

    1.6.3 Requirements

    The requirements of this Plan, as stated in Statement No. 800, Statement No. 769, EPBCReference: 2003/1294, 2008/4178, and 2005/2184 are listed in Table 1-1 to Table 1-3.

    The requirements of this Plan, as stated in Division 2.3 of the Offshore Petroleum andGreenhouse Gas Storage (Environment) Regulations 2009, are listed in Table 1-4.

    The requirements of this Plan, as stated in Division 2.3 of the Petroleum (Submerged Lands)(Environment) Regulations 2012, are listed in Table 1-5.

    Table 1-1 General Requirements of this Plan

    MinisterialCondition

    ConditionNo.

    RequirementSection

    Reference inthis Plan

    EPBCReference:2003/1294and2008/4178

    3.2.1  A description of the EPBC Act listed species and theirhabitat likely to be impacted by the components ofthe action which are the subject of that plan

    4.4.4, 4.4.5, 4.4.6,4.4.7

    3.2.2  An assessment of the risk to these species from thecomponents of the action the subject of that plan

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    3.2.3 Details of the management measures proposed inrelation to these species if it is a requirement of thecondition requiring that plan

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    3.2.4 Details of monitoring proposed for that species if it isa requirement of the condition requiring that plan

    7.7.2

    3.2.5 Performance standards in relation to that species if itis a requirement of the condition requiring that plan

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    3.2.6 Management triggers in relation to that species if it is

    a requirement of the condition requiring that plan

    Not a requirement

    3.2.7 Protocols for reporting to the Department 7.8, 7.9

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    Table 1-2 Requirements in State Waters

    MinisterialCondition

    ConditionNo.

    RequirementSection

    Reference inthis Plan

    EPBC

    Reference:2003/1294and2008/4178

    16.4 (I) Management measures to reduce the impacts from

    pipeline installation activities in State waters, as faras practicable

    6.1.5, 6.2.5, 6.3.5,

    6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    16.4 (II) Management measures to ensure that pipelineactivities in State waters do not cause Material orSerious Harm outside the Terrestrial and MarineDisturbance Footprints associated with those facilitieslisted in Condition 16.1

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    16.4 (III) Performance Standards against which achievementsof the objectives of this condition can be determined

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    16.5 (I) Management measures to address the generationand dispersion of turbidity associated with pipelineinstallation activities

    6.3.5,

    16.5 (II) Management measures to address direct disturbanceof habitat

    6.3.5,

    16.5 (III) Management measures to address preventing harmto, or fatalities of turtles and other EPBC Act listedmarine fauna

    6.1.5, 6.2.5, 6.5.5,6.6.5, 6.7.5, 6.8.5,6.9.5, 6.10.5

    16.5 (IV) Program for pre and post pipeline installation seafloorsurvey of the Marine Disturbance Footprint and theareas at risk of Material or Serious EnvironmentalHarm due to the construction of the pipeline in Statewaters

    7.7.1, and 7.7.3

    16.5 (V) Details of mooring pattern design, including rangeand bearing from fairleads of individual anchor dropsto show how the mooring pattern has been designedto limit impacts in coral habitat in State waters

    3.4.6.2

    16.5 (VI) Details of a typical mooring pattern design for areasother than coral habitat in State waters

    3.4.6.2

    16.5 (VII) Procedures to reduce as far as practicable, theimpacts resulting from anchoring, wire and chainsweep, and wash from thrusters and propellers, onbenthic communities in State waters

    6.3.5,

    16.5 (VIII) Details of proposed hydrotest water discharge andhow this will be managed to avoid Material or SeriousHarm to the marine environment; and

    3.4.5, 6.9.5

    16.5 (IX) A marine monitoring program to detect changes toecological elements outside the Marine DisturbanceFootprint for the Offshore Gas Pipelines in Statewaters

    7.7.2

    Condition 23of StatementNo. 800

    and

    Condition 14

    of StatementNo. 769

    23.2

    14.2

    The Proponent shall consult with DEC (now DPaW),DEWHA (now DotE), and DMP

    1.6.5, Appendix 3

    23.4 (i)

    14.4 (i)

    Management measures to reduce the impacts from

    pipeline installation activities as far as practicable

    6.1.5, 6.2.5, 6.3.5,

    6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

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    MinisterialCondition

    ConditionNo.

    RequirementSection

    Reference inthis Plan

    23.4 (ii)

    14.4 (ii)

    Management measures to ensure that pipelineinstallation activities do not cause Material or Serious

    Environmental Harm outside the Terrestrial andMarine Disturbance Footprint

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,

    6.7.5, 6.8.5, 6.9.5,6.10.5

    23.4 (iii) Performance Standards against which achievementof the objectives of this condition can be determined

    6.1.5, 6.2.5, 6.3.5,6.4.5, 6.5.5, 6.6.5,6.7.5, 6.8.5, 6.9.5,6.10.5

    23.5 (i)

    14.4 (iii)

    Management measures to address the generationand dispersion of turbidity associated with pipelineinstallation activities

    6.3.5

    23.5 (ii)

    14.4 (iv)

    Management measures to address direct disturbanceof habitat

    6.3.5

    23.5 (iii)

    14.4 (v)

    Management measures to prevent harm to, orfatalities of turtles

    6.1.5, 6.2.5, 6.5.5,6.6.5, 6.7.5, 6.8.5,6.9.5, 6.10.5

    23.5 (iv)

    14.4 (vi)

    Program for pre and post pipeline installation seafloorsurvey of the Marine Disturbance Footprint and theareas at risk of Material or Serious EnvironmentalHarm due to the construction of the pipeline in Statewaters

    7.7.1 and 7.7.3

    23.5 (v)

    14.4 (vii)

    Details of mooring pattern design, including rangeand bearing from fairleads of individual anchor dropsto show how the mooring pattern has been designed

    to limit impacts in coral habitat areas within Statewaters

    Not Applicable(N/A)

    23.5 (vi)

    14.4 (viii)

    Details of typical mooring pattern design for otherthan coral habitat areas within State waters

    3.4.6.2

    23.5 (vii)

    14.4 (ix)

    Procedures to minimise as far as practicable theimpacts resulting from anchoring, wire and chainsweep, and wash from thrusters and propellers, onbenthic communities

    6.3.3

    23.5 (viii)

    14.4 (x)

    Details of proposed hydrotest water discharge andhow this will be managed to avoid Material or SeriousHarm to the marine environment

    3.4.5, 6.9.3

    23.5 (ix)14.4 (xi)

     A marine monitoring program to detect changes toecological elements outside the Marine DisturbanceFootprint for the Offshore Gas Pipeline identified inCondition 14.3iv and 14.3v (of Statement No. 800)and Condition 12 (of Statement No. 769)

    7.7.2

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    Table 1-3 Requirements in Commonwealth Waters

    MinisterialCondition

    ConditionNo.

    RequirementSection

    Reference inthis Plan

    EPBC

    Reference:2003/1294and EPBCReference:2005/2184

    16A.1 (I)

    1a

    Design and construction of facilities to allow for the

    complete removal of all structures and components(except flowlines) above the sea floor

    3.2

    16A.1 (II)

    1b

    Sea floor surveys around proposed flowline pathsand well sites to identify sensitive marine ecosystemsuch as reefs, sponge beds and seagrasses andhistoric shipwrecks

    4.4.2.3, 4.4.3.2,4.5.6

    16A.1 (III)

    1c

    Selection of flowline paths and well sites to avoidimpacts on sensitive marine ecosystems and historicshipwrecks as referred to in 16A.1 (ii)/1(b)

    3.3, 4.4.2.3,4.4.3.2, 4.5.6, 6.3.3

    16A.1 (IV) Establish baseline information to inform a risk-basedapproach to environmental management andmonitoring of action attributable impacts to water

    quality, benthic flora and fauna and keystone speciesfrom the installation and operation of marine facilities

    4.0

    16A.1 (V)

    1d

     A schedule of works 3.1 and Table 3-3

    16A.1 (VI)

    1e

    Managing the impacts on cetaceans, includinginteraction procedures for aircraft, supply andconstruction vessels that are consistent with part 8 ofthe Environment Protection and BiodiversityConservation Regulations 2000

    6.1.5, 6.2.5, 6.5.5,6.6.5, 6.7.5, 6.8.5,6.9.5, 6.10.5

    16A.1 (VII)

    1f

    Cetacean sightings reporting 6.2.3, 7.8.2

    16A.1 (VIII)1g

    Hydrotest fluid type, handling and disposal 3.4.5.5, 6.9.3

    16A.1 (IX)

    1h

    Ballast water management for internationalconstruction vessels arriving in Australia inaccordance with Australian Quarantine andInspection Service Australian Ballast WaterManagement Requirements

    6.7.3

    16A.1 (X) 1j The use and disposal of drilling muds. Not within scope

    16A.1 (XI)1j

    The monitoring and disposal of produced form