Offshore Environment Plan
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Offshore Environment Plan TGP-698-PA-HSE-003 QR4-007PA-EP Legacy Document title Version Document no. Review period/Date document no. Offshore Environment Plan 12 TGP-698-PA-HSE-003 QR4-007PA-EP 1 July 2024 Approved by: Role Name Signature Date General Manager Wacek Lipski 16 December 2019 © Tasmanian Gas Pipeline Pty Ltd Page i Offshore Environment Plan TGP-698-PA-HSE-003 Version 12 | 16 December 2019 Preparation Record Rev Description Originator Reviewed Approved Date 12 Amended following NOPSEMA request for further N. Baulch W. Lipski W. Lipski Dec 2019 written information 11 5 Year Review Nuffield Group N. Baulch W. Lipski Oct 2019 10 Amendments to reflect organisational changes in ERS Pty Ltd / TGPPL W. Lipski J. Delicato Nov 2017 2015, including change of facility operator, and changes in legislation and regulatory / statutory authorities – Internal Issue Only 9 Amendments as per NOPSEMA resubmission ERS Pty Ltd / OSDAS B. Parsons B. Parsons Nov 2014 requirements 8 Amendments as per NOPSEMA resubmission Monarc Environmental / B. Parsons B. Parsons Feb 2014 requirements OSDAS 7 Amendments as per NOPSEMA resubmission Monarc Environmental B. Parsons B. Parsons August requirements 2013 6 5 Year Review Monarc Environmental B. Parsons B. Parsons February Amendments to reflect: 2013 • Change of owner/operator • New Offshore Regulatory Authority and their EP requirements • Requirements of Regulatory Authorities 5 Amendments to reflect: A Bambridge A. Bambridge April 2011 • DEPI requirements; • Cessation of operating and maintenance agreement with Jemena. 4 Amendments made in conjunction with Monarc A Bambridge A. Bambridge J. Cleland June 2010 Environmental to reflect DPI requirements 3 Company name change from TGP BBI Pty Ltd to A Bambridge A. Bambridge J. Cleland February Tasmanian Gas Pipeline Pty Ltd 2010 2 Change of pipeline ownership to BBI Pty Ltd and Tas Gas Networks in A. Bambridge J. Cleland Nov 2009 change of company structure from Alinta Asset conjunction with Monarc Management to Jemena Environmental 1 First Amendment (prepared in conjunction with Gas Transmission South F. Nelson J. van Weel 30 Sept Monarc Environmental Pty Ltd) (AAM) 2007 0 Duke Energy JT JM 19 April International 2002 This document is controlled within TGPPL Document Management System Printed or downloaded copies of this document are deemed uncontrolled © Tasmanian Gas Pipeline Pty Ltd Page ii Offshore Environment Plan TGP-698-PA-HSE-003 Version 12 | 16 December 2019 CONTENTS ENVIRONMENT PLAN SUMMARY ......................................................................................................................... 10 1. Introduction ....................................................................................................................................................... 11 1.1 Titleholder .................................................................................................................... 11 1.2 Background................................................................................................................... 11 1.3 Scope ............................................................................................................................ 12 1.4 Objectives of the Offshore EP ........................................................................................ 14 2. Pipeline Overview ........................................................................................................................................... 15 2.1 Description of Operational Features .............................................................................. 15 2.1.1 Subsea Pipeline Route ...................................................................................... 15 2.1.2 Key Co-ordinates and Interfaces ...................................................................... 15 2.1.3 Design and Operating Parameters ................................................................... 17 2.1.4 Pipeline Facilities and Features ........................................................................ 17 2.1.5 Gas Composition ............................................................................................. 18 2.1.6 Third Party Infrastructure ................................................................................ 18 2.2 Key Offshore TGP Activities ........................................................................................... 19 2.2.1 Operation of the Pipeline ................................................................................. 19 2.2.2 Field Surveys and Maintenance Activities ......................................................... 19 2.2.2.1 Support vessels ................................................................................ 20 2.2.2.2 Pipeline Inspections ......................................................................... 20 2.2.2.3 Side Scan Sonar (SSS) ....................................................................... 21 2.2.2.4 Remotely Operated Vehicle (ROV) / Autonomous Underwater Vehicle (AUV) Survey ........................................................................ 21 2.2.2.5 Diver Inspections ............................................................................. 22 2.2.2.6 Internal Inspection (Pigging) ............................................................ 22 2.2.2.7 Maintenance Activities ..................................................................... 22 2.3 Unplanned Events ......................................................................................................... 23 2.3.1 Gas Escape ...................................................................................................... 23 2.3.2 Hydrocarbon Spill ............................................................................................ 24 2.3.2.1 Hydraulic Oil Spill ............................................................................ 25 2.3.2.2 Fuel Spill .......................................................................................... 25 2.3.2.3 Fuel Spill Modelling Results ............................................................. 26 3. Environmental Features ................................................................................................................................ 34 3.1 Physical Environment .................................................................................................... 34 3.2 Biological Environment ................................................................................................. 37 3.3 Cultural Environment .................................................................................................... 46 3.4 Socio-Economic Environment ........................................................................................ 48 3.5 Environmentally Significant Areas ................................................................................. 49 3.5.1 Wetlands of International Importance .............................................................. 49 3.5.1.1 Gippsland Lakes Ramsar Site ........................................................... 49 3.5.1.2 Corner Inlet Ramsar Site .................................................................. 49 3.5.1.3 Threatened Ecological Communities ................................................ 50 3.5.2 Commonwealth Marine Areas .......................................................................... 51 3.5.3 Australian Marine Parks (formerly Commonwealth Marine Reserves) ............... 51 © Tasmanian Gas Pipeline Pty Ltd Page iii Offshore Environment Plan TGP-698-PA-HSE-003 Version 12 | 16 December 2019 3.5.4 Key Ecological Features ................................................................................... 53 3.5.5 National Parks and Reserves ............................................................................ 53 4. Regulatory and other Requirements ....................................................................................................... 57 4.1 Legislative and Regulatory Requirements ...................................................................... 57 4.1.1 Commonwealth OPGGS Act and Environmental Regulations............................. 57 4.1.2 EPBC Act .......................................................................................................... 58 4.1.3 Other Relevant Legislation ............................................................................... 59 4.1.4 International Agreements and Conventions ..................................................... 61 4.2 Standards, Industry Codes and Guidelines .................................................................... 62 4.2.1 NATPLAN ......................................................................................................... 62 4.2.2 Industry Codes of Practice ............................................................................... 62 4.2.3 Industry Standards / Guidelines ....................................................................... 63 4.2.4 Other Environmental Guidelines ...................................................................... 63 5. Environmental Management Framework ............................................................................................... 64 5.1 Environmental Risk Management .................................................................................. 64 5.1.1 Definitions ....................................................................................................... 64 5.1.2 Environmental Risk Management