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Gorgon Gas Development Fourth Train Proposal ... Gorgon Gas Development Fourth Train Proposal: Document No.: G4-NT-REPX0000005 Public Environmental Review – Environmental Scoping

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  • Document No: G4-NT-REPX0000005 Revision: 1

    Revision Date: 21 May 2012 Copy No:

    IP Security: Public

    Gorgon Gas Development Fourth Train Proposal: Public Environmental Review – Environmental Scoping Document

    © Chevron Australia Pty Ltd

    App B4

  • Gorgon Gas Development Fourth Train Proposal: Document No.: G4-NT-REPX0000005 Public Environmental Review – Environmental Scoping Document DMS ID: 003898397 Revision: 1 Revision Date: 21 May 2012

    Page ii Public © Chevron Australia Pty Ltd Uncontrolled when Printed Printed Date: 14 June 2013

    Controlled Document Public Environmental Review – Environmental Scoping Document

    Document Information Document Number: G4-NT-REPX0000005 DMS ID: 003898397 Revision 1

    Document Custodian: David Lee Department: Gorgon Expansion

    Revision Approvals

    Name Signature Date

    Prepared: Colette Curran

    Checked: Daley Welch

    Approved: David Lee Document Control QC:

    Revision History

    Revision Date Description Prepared Checked Approved

    0 8 May 2012 Approved for Use CEZO DWMH AENB

    1 21 May 2012 Revised to incorporate OEPA changes CEZO DWMH AENB

    IP and Security Classification The IP and security classification of this document is:

    Public

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  • Document No: G4-NT-REPX0000005 Gorgon Gas Development Fourth Train Proposal: DMS ID: 003898397 Public Environmental Review – Environmental Scoping Document Revision Date: 21 May 2012 Revision: 1

    © Chevron Australia Pty Ltd Public Page iii Printed Date: 14 June 2013 Uncontrolled when Printed

    Document Distribution

    Copy No. Company Name

    O (Original) Chevron Australia Pty Ltd Document Control

    1. Chevron Australia Pty Ltd Colin Beckett

    2. Chevron Australia Pty Ltd John Dagleish

    3. Chevron Australia Pty Ltd Julia Martin

    4. Chevron Australia Pty Ltd Paul Coleman

    5. Chevron Australia Pty Ltd Tom Koren

    6. Chevron Australia Pty Ltd Roger Walpot

    7. Chevron Australia Pty Ltd Peter Oberstoetter

    8. Chevron Australia Pty Ltd David Cruikshank

    9. Chevron Australia Pty Ltd Paul Evans

    10. Chevron Australia Pty Ltd Norm Taylor

    11. Chevron Australia Pty Ltd Mark Trupp

    12. Chevron Australia Pty Ltd John Torkington

    13. Chevron Australia Pty Ltd David Lee

    14. Chevron Australia Pty Ltd Johann van der Merwe

    15. Chevron Australia Pty Ltd Peter Landman

    16. Chevron Australia Pty Ltd Graeme Lobley

    17. Chevron Australia Pty Ltd Daley Welch

    18. Chevron Australia Pty Ltd Amy Ruddock

    19. Chevron Australia Pty Ltd Dirk Manson

    20. Chevron Australia Pty Ltd Russel Lagdon

    21. Chevron Australia Pty Ltd Steve Vellacott

    22. Chevron Australia Pty Ltd Brendan Privilege

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  • Gorgon Gas Development Fourth Train Proposal: Document No.: G4-NT-REPX0000005 Public Environmental Review – Environmental Scoping Document DMS ID: 003898397 Revision: 1 Revision Date: 21 May 2012

    Page iv Public © Chevron Australia Pty Ltd Uncontrolled when Printed Printed Date: 14 June 2013

    Additional Approval Page

    Endorsed by (if required)

    Name Signature Date

     Legal Paul Evans

     PGPA Norm Taylor

    Additional Approvals (if required)

    Name Signature Date

     Expansion Project Manager John Dagleish

     General Manager Greater Gorgon Colin Beckett

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  • Document No: G4-NT-REPX0000005 Gorgon Gas Development Fourth Train Proposal: DMS ID: 003898397 Public Environmental Review – Environmental Scoping Document Revision Date: 21 May 2012 Revision: 1

    © Chevron Australia Pty Ltd Public Page v Printed Date: 14 June 2013 Uncontrolled when Printed

    Table of Contents 1.0 Introduction ....................................................................................................................................... 1

    1.1 Purpose of this Document ......................................................................................................... 1

    1.2 Proponent Details...................................................................................................................... 3

    1.3 Project History ........................................................................................................................... 3

    1.3.1 Overview .................................................................................................................... 3

    1.3.2 Approvals History ...................................................................................................... 3

    1.4 Structure of this Document ....................................................................................................... 5

    2.0 Summary Description of the Proposal ............................................................................................ 6

    2.1 Proposal Overview .................................................................................................................... 6

    2.2 Key Characteristics of the Fourth Train Proposal ..................................................................... 7

    2.2.1 Subsea Gathering System ......................................................................................... 7

    2.2.2 Feed Gas Pipeline System ........................................................................................ 8

    2.2.3 Gas Treatment Plant ............................................................................................... 10

    2.2.4 Marine Facilities and Operations ............................................................................. 10

    2.2.5 Supporting Infrastructure ......................................................................................... 10

    2.3 Fourth Train Proposal Footprint on Barrow Island .................................................................. 13

    2.4 Construction Schedule and Workforce ................................................................................... 13

    2.5 Justification for Selected Option and Alternative Options Considered ................................... 13

    3.0 Key Legislation ................................................................................................................................ 15

    3.1 Environmental Protection Act (WA) ........................................................................................ 15

    3.2 Barrow Island Act (WA) ........................................................................................................... 16

    3.3 Environment Protection and Biodiversity Conservation Act (Commonwealth) ....................... 16

    3.4 Policies and Guidelines ........................................................................................................... 17

    4.0 Environmental Setting .................................................................................................................... 19

    4.1 Regional Setting ...................................................................................................................... 19

    4.2 Physical Environment ............................................................................................................. 19

    4.2.1 Climate ..................................................................................................................... 19

    4.2.2 Terrestrial Environment ........................................................................................... 19

    4.2.3 Marine Environment ................................................................................................ 20

    4.3 Biological Environment ........................................................................................................... 21

    4.3.1 Terrestrial Ecology ................................................................................................... 21

    4.3.2 Marine Ecology ........................................................................................................ 23

    4.3.3 Protected/Conservation Areas ................................................................................. 24

    4.4 Human Environment ............................................................................................................... 26

    4.4.1 Land and Sea Use ................................................................................................... 26

    4.4.2 Local and Regional Economy .................................................................................. 26

    4.4.3 Local Community ..................................................................................................... 27

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  • Gorgon Gas Development Fourth Train Proposal: Document No.: G4-NT-REPX0000005 Public Environmental Review – Environmental Scoping Document DMS ID: 003898397 Revision: 1 Revision Date: 21 May 2012

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    4.4.4 Culture and Heritage ............................................................................................... 27

    5.0 Preliminary Environmental Analysis of the Fourth Train Proposal .......................................... 28

    5.1 Introduction and Purpose ....