Gorgon Emp Offshore Feed Gas Pipeline Installation Management Plan

8/18/2019 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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Gorgon Gas Development and Jansz Feed Gas Pipeline: Document No.: G1-NT-PLNX0000298

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

Revision: 4

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Uncontrolled when Printed Printed Date: 14 July 2014

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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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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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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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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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.


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


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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Gorgon Gas Development and Jansz Feed Gas Pipeline: D

Offshore Feed Gas Pipeline Installation Management PlanR

Page 26 Public

Uncontrolled when Printed

Figure 1-1 Location of the Greater Gorgon Area


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Document No: G1-NT-PLNX0000298

Revision Date: 10 June 2014

Revision: 4

© Chevron Australia Pty Ltd Public Printed Date: 14 July 2014

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


ConditionNo.

RequirementSection


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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ConditionNo.

RequirementSection


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


ConditionNo.

RequirementSection


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