Release Notice. Document Conventions. Document Custodian. Deviations from Document

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2 Release Notice This document is available through the Australia Pacific LNG (APLNG) Upstream Phase 1 Project controlled document system TeamBinder. The responsibility for ensuring that printed copies remain valid rests with the user. Once printed, this is an uncontrolled document unless issued and stamped Controlled Copy. Third-party issue can be requested via the Australia Pacific LNG Upstream Phase 1 Project Document Control Group. Document Conventions The following terms in this document apply: Will, shall or must indicate a mandatory course of action Should indicates a recommended course of action May or can indicate a possible course of action. Document Custodian The custodian of this document is the Australia Pacific LNG Upstream Phase 1 Project Environmental Technical Services Manager. The custodian is responsible for maintaining and controlling changes (additions and modifications) to this document and ensuring the stakeholders validate any changes made to this document. Deviations from Document Any deviation from this document must be approved by the Australia Pacific LNG Upstream Phase 1 Project Environmental Technical Services Manager. Doc Ref: Q MP-006 Revision: 3 Page 2 of 95

3 Table of Contents 1. Introduction Project Description Purpose Document Use Definitions, Abbreviations and Documents Definitions and Abbreviations Internal Supporting Documents Revision History Scope Geographical Extent Land Uses and Tenure Environmental Authority Conditions Coordinator General s Conditions Rehabilitation Methods Vegetation Clearing and Mulching Waste Management and Removal Natural Regeneration Soil Management Soil Management Groups Topsoil Stripping Subsoil Stripping Stockpiling Backfilling Re-profiling Ripping and Scarification Soil Amelioration Topsoil Re-spreading Erosion and Sediment Control Revegetation Pasture Establishment Seeding for Reinstatement Direct Seeding of Native Species for Final Rehabilitation Planting Seed Procurement Vegetation Re-spreading Weed Management Doc Ref: Q MP-006 Revision: 3 Page 3 of 95

4 4.9.1 Weed Species Prevention of Spread Weed Treatment Pest Management Fire Prevention Measures Fuel Reduction Ecological Fire Requirements Ongoing Rehabilitation Maintenance Rework Disturbance Type Well Pads (Production Wells, Exploration/Appraisal, Injection Wells and Monitoring Bores) Description of Activity Installation Process Rehabilitation Process Tanks and Stimulation Dams Description of Activity Installation Process Rehabilitation Process Gas and Water Gathering Line Description of Activity Installation Process Rehabilitation Central Compressor Station Description of Activity Installation Process Rehabilitation Water Transfer Stations and Water Transfer Pipelines Description of Activity Installation Process Rehabilitation Process Water Treatment Facilities Description of Activity Installation Process Rehabilitation Process Dams Description of Activity Installation Process Doc Ref: Q MP-006 Revision: 3 Page 4 of 95

5 5.7.3 Rehabilitation Process Above Ground Power Lines Description of Activity Rehabilitation Process Below Ground Power Lines Description of Activity Installation Process Rehabilitation Process Access Tracks Description of Activity Construction Process Rehabilitation Process Camps Description of Activity Construction Process Rehabilitation Process Borrow Pits Description of Activity Construction Process Rehabilitation Process Residual Pollution Risks and Management and Mitigation Strategies Notifiable Activities Hazardous Materials Notification of Hazardous Material Release Site Investigation Mitigation Strategies Dams Soils Rehabilitation Type Rehabilitation Hierarchy Remnant Native Vegetation Disturbance Limits Rehabilitation Objective Rehabilitation Technique Native Vegetation Regional Ecosystems and High Value Regrowth Rehabilitation Techniques for Broad Vegetation Groups Rehabilitation Techniques for TECs Doc Ref: Q MP-006 Revision: 3 Page 5 of 95

6 7.5 Flora Species of Conservation Significance Rehabilitation Objective Rehabilitation Techniques Habitat of Fauna Species of Conservation Significance Rehabilitation Objective Rehabilitation Techniques Pastoral Land Disturbance Summary Rehabilitation Objective Rehabilitation Technique Cropping Land Disturbance Summary Rehabilitation Objective Rehabilitation Technique Riparian Areas and Watercourse Crossings Rehabilitation Objective Rehabilitation Techniques Stock Routes Rehabilitation Objective Rehabilitation Techniques Success Criteria By Approval Conditions By Disturbance Type By Rehabilitation Type Monitoring and Compliance Reporting Monitoring Type, Method and Frequency Surveys and Monitoring Prior to Construction Monitoring post construction Monitoring on the Completion of the Rehabilitation Procedure Monitoring Post Construction Data and Document Management Compliance Reporting, Contents and Frequency Environmental Authority Reporting Responsibility Australia Pacific LNG Inductions and Training Environment Advisor Bibliography Doc Ref: Q MP-006 Revision: 3 Page 6 of 95

7 Appendix A: Statutory Declaration Appendix B: Resume List of Figures Figure 1: Flow Chart: General Rehabilitation Process Figure 2: Flow Chart: Revegetation Process for Agricultural Land Figure 3: Flow Chart: Revegetation Process for Native Vegetation List of Tables Table 1: Abbreviations... 9 Table 2: Definitions Table 3: Supporting Documents to the Table 4: Land Usage Combabula Development Area Table 5: Land Tenure Combabula Development Area Table 6: Details of where Combabula Environmental Authority EPPG conditions A10 (h-l) and H1-H3 are addressed Table 7: Details of Where the Co-ordinator General s Conditions are Addressed Table 8: Soil Management Groups Table 9: Rehabilitation Techniques for Infrastructure (Disturbance) Types Table 10: Regional Ecosystems (REs) within the Combabula Development Area Table 11: Regional Ecosystem Descriptions and Revegetation Guidelines Table 12: Rehabilitation Success Criteria as outlined in the Combabula EA EPPG , Schedule H, H10 a-b and Measurable Success Criteria Table 13: Rehabilitation Success Criteria for Specific Disturbance Type Table 14: Rehabilitation Success Criteria based on Rehabilitation Type Doc Ref: Q MP-006 Revision: 3 Page 7 of 95

8 1. Introduction 1.1 Project Description Australia Pacific LNG Pty Limited (Australia Pacific LNG), a 37.5:37.5; 25 joint venture between Origin Energy Resource Limited (Origin), ConocoPhillips and Sinopec proposes to develop a world scale long-term coal seam gas (CSG) to liquefied natural gas (LNG) project in Queensland. The 30 year Project has the following objectives: Development of the Walloons gas fields in the Surat Basin in southern central Queensland with up to 10,000 CSG wells Construction and operation of approximately 530km main gas transmission pipeline ( the gas pipeline ) to connect the Walloons gas fields with the LNG facility near Laird Point Construction and operation of an LNG facility near Laird Point on Curtis Island near Gladstone for production and export of approximately 18Mtpa of LNG. Within the Combabula Gas Fields, it is proposed that production wells will be drilled and connected to the gathering system. Authorised petroleum activities to be carried out at under the EA may include development of: exploration, appraisal, injection and production wells monitoring bores gas and water gathering networks waste transfer stations and pipeline field compressor stations central compressor station water treatment facilities dams laydown and stockpile areas sewage treatment plants access tracks communication towers miscellaneous infrastructure workforce accommodation. All existing and proposed infrastructure is depicted in Figures 9 and 10 of the Combabula Plan of Operations Q MP-1068 Doc Ref: Q MP-006 Revision: 3 Page 8 of 95

9 2. Purpose This Rehabilitation, Plan has been prepared to address rehabilitation activities within the Combabula Development Area. The rehabilitation Plan has considered State Government approval conditions for the Australia Pacific LNG Project relating to rehabilitation activities within the Combabula Gas Fields. Specifically, this Plan has been developed to address approval conditions A10 (h-l) and H1-H3 within the Combabula Environmental Authority, EPPG A Remediation, Rehabilitation, Recovery and Monitoring Plan (RRRMP) was previously developed to address conditions 15 to 19 of EPBC approval 2009/4974 issued by the Department of Sustainability, Environment, Water, Population, and Communities (DSEWPaC) on 21 February As such, these conditions are not again addressed here. Reinstatement and rehabilitation of disturbed areas is a regulatory requirement at the Federal and State level as part of environmental impact mitigation measures for the Australia Pacific LNG Project. Due to the different types of activities, disturbances and land uses across the Combabula Gas Fields, there is a need for a diversified approach to rehabilitation. Each site and each location will require specific rehabilitation measures to ensure the significantly disturbed land is returned to the pre-disturbance condition at the completion of the Project type. Figures 1-3 identify the application of the sections within this document and how they are to be applied to deliver rehabilitation of land to the pre-disturbance land use. 2.1 Document Use The function of this document is to identify the range of rehabilitation methods (Section 4) that may be required to successfully undertake shaping and rehabilitation of land to a pre-disturbance land use. During the field development a variety of disturbance types (Sections 5) are undertaken and within this document the disturbance type is described and the rehabilitation objective outlined for the disturbance type taking into consideration the rehabilitation methods from Section 4. Sections 7 and 8 identify the methods to return land to a particular pre-disturbance land use (pasture, cropping, native vegetation), identifying the variety of rehabilitation types and objectives that are necessary to achieve the pre-disturbance land use and function. Sections 9 and 10 identify the success criteria to be used to identify if the rehabilitation has achieved the desired out come and discusses the monitoring efforts that are required to prove that the rehabilitation outcome has been achieved for both the rehabilitation type and the disturbance 2.2 Definitions, Abbreviations and Documents Definitions and Abbreviations In this document, the following definitions and abbreviations apply: Table 1: Abbreviations Term/Abbreviation APLNG ATP CCS CSG DEEDI DERM DSEWPaC EA Meaning Australia Pacific LNG Authority to Prospect Central Compressor Station Coal seam gas Department of Employment, Economic Development and Innovation Department of Environment and Resource Management (currently EHP) Department of Sustainability, Environment, Water, Population and Communities (Commonwealth) Environmental Authority Doc Ref: Q MP-006 Revision: 3 Page 9 of 95

10 Term/Abbreviation EHP EIS EMP EMR EP Act EPBC Act ESA(s) ESDAT EVNT FIC GCL GQAL HDPE HSEMS IECA LNG LP Act MDL MNES NC Act NRM PL PLA PoO PPL RE RoW(s) RRRMP SCL SEVT SMU TEC VM Act WTF WTS Meaning Department of Environment and Heritage Protection (Queensland) (formerly DERM) Environmental Impact Statement Environmental Environment Management Register Environmental Protection Act 1994 (Queensland) Environmental Protection and Biodiversity Conservation Act 1999 (Commonwealth) Category A, B and C Environmentally Sensitive Areas as mapped by EHP and defined in the Condabri Environmental Authority (Schedule L) Environmental Data Management System A species listed as endangered, vulnerable or near threatened under the NC Act or threatened species under the EPBC Act. Field Inspection Checklist Geosynthetic clay liner Good Quality Agricultural Land as defined by Planning Guidelines: the Identification of Good Quality Agricultural Land (Queensland) High density polyethylene Health Safety Environment Management System International Erosion Control Association Liquefied Natural Gas Land Protection (Land and Stock Route Management) Act 2002 (Queensland) Minimum Disturbance Lease Matters of National Environmental Significance listed under the EPBC Act Nature Conservation Act 1992 (Queensland) Natural Resource Management Petroleum Lease Petroleum Lease Application Plan of Operations Petroleum Pipeline Lease Regional Ecosystem Right of Way(s) Remediation, Rehabilitation, Recovery and Monitoring Program Strategic Cropping Land Semi Evergreen Vine Thicket Soil Management Unit Threatened Ecological Community listed under the EPBC Act Vegetation Management Act (1999) (Queensland) Water Treatment Facility Water Transfer Station Doc Ref: Q MP-006 Revision: 3 Page 10 of 95

11 Table 2: Definitions Term Decommissioning Progressive Rehabilitation Recovery Regeneration Rehabilitation Reinstatement Remediation Revegetation Meaning To withdraw something from active service. This typically involves the removal of project infrastructure on the completion of a project. The process by which significantly disturbed areas are rehabilitated to their predisturbance land use with the same species and density of cover to that of surrounding undisturbed areas, as soon as practicable following the completion of any construction or operational works (Based on EHP EA conditions) The process of protecting, conserving and managing a listed threatened species or a listed threatened ecological community (EPBC Act definition) Vegetation that regenerates naturally (i.e. without the assistance of human intervention) from existing seed banks, suckering or coppice growth Means the process of reshaping and revegetating land to restore it to a stable landform and in accordance with acceptance criteria set out in relevant environmental approvals and, where relevant, includes remediation of contaminated land (EHP EA definition) The process of bringing the construction earthen landscape back to the original profile of the surrounding environment, including the stabilisation of the site. This can include seeding with grasses to stabilise the site. To take action to repair or mitigate damage that may or will be, or that has been, caused to a MNES or an EVNT listed species (EPBC Act definition) Remediation, in reference to contaminated land, means: (a) rehabilitate the land; or (b) restore the land; or (c) take other action to prevent or minimise serious environmental harm being caused by the hazardous contaminant contaminating the land (EP Act definition (Qld)) The use of direct seeding or tubestock to support an area achieving the preclearance native vegetation or regional ecosystem Doc Ref: Q MP-006 Revision: 3 Page 11 of 95

12 2.3 Internal Supporting Documents In this document, the following documents are referred: Table 3: Supporting Documents to the Document type Document number Title Environment Authorities EPPG Level 1 Environmental Authority for Petroleum Lease (PL/ATP) 297, 403, 404, 405, 406, 407, 408, 412, 413, 606P Directives ORG-HSE-DVE-020 Origin Energy HSEMS Directive Material and Waste Procedures Australia Pacific LNG Management Plans OEUP-HSE-DVE-036 OEUP-HSE-DVE-021 ORG-RSK-DVE-006 OEUP-Q1000-PLN- ENV-004 OEUP-1000-PRO-ENV- 005 OEUP-1000-PRO-ENV- 007 OEUP-1000-PRO-ENV OEUP-1000-PRO-ENV- 025 OEUP-Q4000-SOP- ENV-001 OEUP-Q1000-FRM- ENV-012 Q MP-0001 Q MP-1068 Q-LNG01-15-MP-0107 Q-LNG01-15-MP-0108 Q-LNG01-15-MP-0114 Q-LNG01-15-MP-0109 Q-LNG01-15-MP-0110 Q-LNG01-15-MP-0113 Q-LNG01-15-MP- 0113_01 Q-LNG01-15-MP-1005 Q-LNG01-15-MP-1001 Q-LNG01-15-MP-0144 Origin Energy HSEMS Directive Land Management Origin Energy HSEMS Directive Biodiversity Management Origin Energy HSEMS Directive Incident Management CSG Drilling, Completion, Stimulation and Well Intervention Activities Origin Weed Management Procedure Origin Campsite Selection, Design and Construction Origin Well Site Selection, Design and Construction Vehicle Weed Hygiene Procedure Spill Response Standard Operating Procedure- Level 1 CSG Operations Worksite Environmental Inspection Checklist Australia Pacific LNG Project Combabula Environmental Combabula Plan of Operations Australia Pacific LNG Remediation, Rehabilitation and Recovery Monitoring Plan Australia Pacific LNG Upstream Phase 1 Threatened Flora Australia Pacific LNG Upstream Phase 1 Threatened Ecological Communities Australia Pacific LNG Environmental Constraints and Field Development Protocol Australia Pacific LNG Upstream Phase 1 Biosecurity Management Plan Australia Pacific LNG Upstream Phase 1 Threatened Fauna Australia Pacific LNG Upstream Phase 1 Threatened Fauna addendum Australia Pacific LNG Upstream Phase 1 Construction Environmental Australia Pacific LNG Upstream Phase 1 Project Construction Environmental Australia Pacific LNG Upstream Phase 1 Detailed Construction Environmental Doc Ref: Q MP-006 Revision: 3 Page 12 of 95

13 Document type Document number Title Australia Pacific LNG Management Plans Australia Pacific LNG Work Instruction Australia Pacific LNG Environment Approvals Australia Pacific LNG Design Australia Pacific LNG Reports Combabula Development Area Management Plans Q-LNG01-95-AQ-9218 Q-LNG01-15-AT-0074 Q MP-0001 Q MP-0001 Q MP-0005 Q-LNG01-15-AP-0013 Q-LNG01-15-AW-0012 Q-LNG01-15-EA-0062 Q-LNG01-60-PH-0002 Q-LNG01-15-RP-0155 Q MP-0007 Q MP-0002 Q MP-1005 Q MP-1007 Q MP-0001 Field Inspection Checklist - Environmental Clean-up and Rehabilitation Tampering with EVNT Listed Wildlife Special Least Concern Special Native and Colonial Animal Breeding Places Australia Pacific LNG Combabula CSG Water Australia Pacific LNG Upstream Waste Combabula Rehabilitation Monitoring Program Land Contamination Procedure Discovered or known land contamination Australia Pacific LNG Upstream Phase 1 Determining Secondary Approvals Requirements: Watercourse and Waterways Upstream Fire Management Strategy Australia Pacific LNG Wellhead Electrification Design Basis Australia Pacific LNG Upstream Phase 1 Species Management Program Tampering with EVNT, Special and Colonial Animal Breeding Places Gas Fields Soil Assessment and Combabula Gas Field Overview Soil Assessment and Combabula Gas Processing Facility Soil Assessment and Combabula/Reedy Creek Gathering (Gas Wells and Flow lines) Soil Assessment and - Combabula/Reedy Creek FCSs and Trunklines Soil Assessment and Reedy Creek (Gas Plant and Water Treatment) Facilities Doc Ref: Q MP-006 Revision: 3 Page 13 of 95

14 2.4 Revision History Date of update Revision # Description of change 21/08/13 3 Section 1.1 included reference to injection wells and monitoring bores as infrastructure to be built 21/08/13 3 Section included Table 2: Definitions 21/08/13 3 Figures 1, 2, 3, 4, 5, 9, 10, 11 removed 21/08/13 3 Section 4.5 included Erosion and Sediment control will be guided by site specific Erosion and Sediment Control plans. 21/08/13 3 Section 4.7 updated to state - To meet Project requirements for direct seeding, seed will need to be purchased for pasture and native species, with a preference for local provenance seed of species adapted to local conditions. 21/08/13 3 Section 5.1 and Table 9 updated to include reference to reinjection wells Date of update Revision # Description of change 23/04/13 2 Section 2 Included Section 2.1 Document use Updated definitions and abbreviations Updated supporting documents 23/04/13 2 Section updated document references 23/04/13 2 Section withdrew species list and inserted reference 23/04/13 2 Section included Stimulation Tanks into description, install and rehabilitation 23/04/13 2 Section Ponds are now referenced as Dams and clarified activity in description 23/04/13 2 Section removed reference to quarries 23/04/13 2 Section updated Table 13 to include non remnant vegetation success criteria 23/04/13 2 Section removed checklist and referred to existing supporting documents 23/04/13 2 Section updated and reference to Combabula Rehabilitation Monitoring Program 15/11/12 1 Section 7.3 Native Vegetation subsection Regional Ecosystems and High Value Regrowth Table 7: Regional Ecosystems within the Combabula Development Area Table 8: Regional Ecosystem descriptions and revegetation guidelines Doc Ref: Q MP-006 Revision: 3 Page 14 of 95

15 3. Scope 3.1 Geographical Extent The Combabula Gas Fields include the Petroleum Lease (PL) 297, 403, 404, 405, 406, 407, 408, 412, 413, and Authority to Prospect 606P. The Combabula development area is located approximately 42 km north-east of Roma in Queensland s Surat Basin on the Western Downs of Queensland and covers an area of approximately 138,000ha in the regional council areas of Maranoa and Western Downs. 3.2 Land Uses and Tenure The Combabula development area is characterised by gentle slopes, low hills and undulating plains. Lateritic scarps and sandstone hills are common throughout the area. A belt of undulating lateritic scarp, with slopes in the area up to 10%, is present across the north portion of the area. This is accentuated in the far north-east corner with slopes up to 20%. The southern portion of the tenement is comprised of broad undulating plains and lowlands with patches of low sandstone hills and lateritic scarps. Some tributary fluvial plains are present in the north-west corner and on the eastern boundary. Landform is depicted in Figure 4 of the Combabula Plan of Operations. The predominant land use over the Combabula development area is cattle grazing. Various forms of cropping are found in areas of more fertile soil and where the use of machinery is not constrained. Other land uses include forestry and dry land cropping. Rural homesteads are scattered throughout the development area. Table 4 provides a breakdown and depiction of land usage in the development area. Land use is depicted in Figure 2 within the Combabula Plan of Operations. Table 4: Land Usage Combabula Development Area Total area (km 2 ) Land use category 1,386 % of Development Area Grazing natural vegetation / minimal use 69.6 Grazing modified pasture 19.0 Forestry production (State forest, which may be grazed) 7.1 Dry-land cropping / horticulture 4.3 Table note: 1 Production forestry on state forest tenures includes grazing activities as a co-use (Source: Combabula EMP, version 2, 25 June 2012) The predominant land tenure in the development area is Freehold. The percentage of the total area comprised by each land tenure category is summarised in 5. Table 5: Land Tenure Combabula Development Area Tenure category % of Development Area Freehold 65.7 Leasehold 25.3 Reserve 0.3 State Forest 7.0 Roads, Easements, Watercourses 1.7 (Source: Combabula EMP, version 2, 25 June 2012) Doc Ref: Q MP-006 Revision: 3 Page 15 of 95

16 3.3 Environmental Authority Conditions This Rehabilitation Plan has been prepared to address State government approval conditions for the Australia Pacific LNG Project relating to rehabilitation activities within the Combabula Gas Field. Specifically, this plan had been developed to address approval conditions A10 (h-l) and H1-H3 within the Combabula Environmental Authority (EPPG ). Table 6, below displays where these conditions are addressed. Table 6: Details of where Combabula Environmental Authority EPPG conditions A10 (h-l) and H1- H3 are addressed EA Condition A10 (h) a rehabilitation plan for all existing and programmed and approved infrastructure during the period of the Operational plan, including but not necessarily limited to the following: (i) for each site to be disturbed, a description of the rehabilitation activities to be performed during the period of the Plan, including but not limited to: (A) location (e.g. tenure, co-ordinates) including general site characteristics (e.g. topographic parameters including but not limited to landscape position, grade, aspect) and disturbance type (e.g. well lease, flow line, access track); (B) pre-disturbance land use for each area; (C) vegetation communities present including, but not limited to, species composition and RE type for native vegetation communities, within each disturbed site, including a map of their distribution; (ii) baseline information for each vegetation community present within a disturbed site including, but not limited to: (A) flora species richness and diversity; (B) a description of the structural strata present (i.e. within each strata the dominant species present, associated stem count densities (woody vegetation); and (C) percent foliage cover (accounting for seasonal variation and excluding any declared pests under the Land Protection (Pest and Stock Route Management) Act 2002)); (iii) information with respect to general habitat features, including but not limited to: (A) percentage of litter cover; (B) hollow bearing logs; and (C) coarse woody debris Section of Rehabilitation Plan where addressed (h) Entire document with references to Combabula Plan of Operations Q MP-1068 (i) Outlined in Section 5 Disturbance Type and 7 Rehabilitation Type (A) Outlined in Section 3 Scope and Section 5 Disturbance Type and the Combabula Plan of Operations Q MP-1068 (B) Outlined Section 3.2 and the Combabula Plan of Operations Q MP-1068 (C) Outlined Section 7 Rehabilitation Type (ii) Process outlined in Section 9 Surveys and Monitoring prior to Construction (A) Process outlined Section 9 (B) Process outlined Section 9 (C) Process outlined Section 9 (iii) Process outlined in Section 9 Surveys and Monitoring prior to Construction (D) Process outlined Section 9 (E) Process outlined Section 9 (F) Process outlined Section 9 (iv) soil types and defining characteristics, including a map of their distribution, present within each of the areas to be rehabilitated; (v) proposed revegetation methods, including but not limited to: (A) re-profiling; (iv) Outlined Section 4.4 Soil Management (v) Outlined Section 4 Rehabilitation Methods (A) Outlined Section (B) Outlined Section (C) Outlined Section Doc Ref: Q MP-006 Revision: 3 Page 16 of 95

17 EA Condition (B) re-spreading soil; (C) soil ameliorants or amendments; (D) surface preparation (E) method of propagation. Section of Rehabilitation Plan where addressed (D) Outlined Section (E) Outlined Section 4.6 (vi) area to be rehabilitated (vi) Outlined in Combabula EMP Table 3.4 (vii) post-disturbance land use (vii) Outlined in Section 4 Rehabilitation Methods and Section 7 Rehabilitation Type A10 (i) Monitoring program to measure rehabilitation success which identifies: (i) Outlined Section 9 Monitoring and Compliance Report (i) analogue sites to be used for measuring rehabilitation success that represent the predisturbed land uses and vegetation communities of each area to be significantly disturbed from carrying out the petroleum activity(ies); (ii) the parameters to be measured on a yearly basis in analogue sites for determining rehabilitation success, including but not limited to: (a) flora species richness and diversity (b) descriptions of the structural strata present (c) dominant species within each strata (d) associated stem count densities (e) precent foliage cover (iii) the experimental design for analysing analogue and rehabilitated site data including statistical methods of analysis; (iv) performance criteria (i) Outlined Section 9 (ii) All outlined Section 9 (iii) Outlined Section 9 (iv) Outlined Section 8 Success Criteria (j) a description of progressive rehabilitation carried out including performance in relation to the requirements set out in the environmental authority and the proposed rehabilitation activities set out in the previous operational plan (k) The calculation of the financial assurance for the maximum disturbance expected during the period of the operational plan (l) A description of how the positioning, design and operation of petroleum activities will avoid or minimise impacts on land identified as Good Quality Agricultural Land using the assessment methodology that supports the State Planning Policy 1/92 The Protection of Good Quality Agricultural Land particularly the land identified as Class A and B using this methodology H1 A Rehabilitation Plan which has been certified by a suitably qualified person must be developed prior to carrying out of the petroleum activity(ies) (i) Outlined Section 8 Success Criteria Outlined Section 5 Refer Section 6 Table 2 of the Combabula EMP (l) Outlined Section 7.6 and 7.7 Entire document Doc Ref: Q MP-006 Revision: 3 Page 17 of 95

18 EA Condition H2 The Rehabilitation Plan must include strategies for the determination of final land use(s) and rehabilitation goals and details of how rehabilitation objectives will be achieved. The Rehabilitation Plan must include: H2 (a) A rehabilitation hierarchy for: (i) reinstating a native ecosystem as similar as possible to the original ecosystem as the preferred option; then (ii) establishing an alternative outcome with a higher environmental value than the previous land use; then (iii) reinstating the previous land use (e.g. grazing or cropping) H2 (b) Methods to achieve rehabilitation goals including, but not necessarily being limited to: Section of Rehabilitation Plan where addressed The process for determining final land use is outlined in Section 7.1 The process for establishing specific rehabilitation goals is outlined in Section (native vegetation), (grazing land) and (cropping land). The process is also outlined in Section (native vegetation), Section (grazing land) and section (cropping land) Rehabilitation goals will be achieved by following the general rehabilitation process outlined in Section 4. Outlined in Section 7.1 The process for establishing final rehabilitation goals is outlined in Section 7.1 (i) (ii) (iii) (iv) (v) Establishing final land use(s) in consultation with affected landholder(s) and the administering authority; Identifying suitable analogue sites to measure rehabilitation success that may either be the pre-disturbed area or another area that has equivalent values and characteristics as the intended final land use(s); and For sites that are being reinstated to a land use other than a native ecosystem, the Rehabilitation Plan must identify any additional and relevant indicators to be measures at both the analogue and rehabilitation site(s) so as the assess progressive and final rehabilitation success for that land use; For sites that are being reinstated to native ecosystems and the analogue site is the pre-disturbed site, the Rehabilitation Plan must include indicators that, as a minimum include those in condition A10 (h) and will be able to measure success against the progressive and final rehabilitation criteria in this environmental authority; Identification of any land use constraints which have resulted from the petroleum activity(ies); Process for identification of analogue sites is outlined in Section 9 Indicators and measures for analogue sites outlined in Sections and Indicators and measures for rehabilitation sites outlined in Section and Section Indicators outlined in Section Land use constraints outlined in the introduction to Section 5. (vi) Residual pollution risks with strategies for managing and mitigating them; Residual pollution risks addressed in Section 6 Doc Ref: Q MP-006 Revision: 3 Page 18 of 95

19 EA Condition (vii) (viii) (ix) (x) Landscape planning and landform design principles to achieve stable landforms including slope designs, erosion controls and drainage lines; Integrating rehabilitated areas so they are compatible with the surrounding landscape, including linking rehabilitated areas of native vegetation with undisturbed native vegetation to provide larger areas and wildlife corridors where feasible; Ensuring that significantly disturbed areas are rehabilitated progressively and that the progressive rehabilitation criteria are routinely measured: Site preparation such as re-profiling, reinstating surface drainage systems; Section of Rehabilitation Plan where addressed Landform design principles addressed in Section Slope design and erosion and sediment control addressed in Section 4.5 Outlined in Section Progressive rehabilitation techniques (re-instatement) for significantly disturbed areas are outlined in Section 5. The frequency of monitoring of rehabilitation criteria is outlined in Combabula Rehabilitation Monitoring Program (Q MP-0005). Re-profiling and surface drainage reinstatement addressed in Section (xi) (xii) (xiii) (xiv) Top soil management such as top soil handling and stockpiling to preserve soil fertility and biota, respreading techniques, planned thickness, ripping, top soil treatments/amendments and mulching in consideration of analogue data; Flora to be established, including required species diversity, abundance and composition and projective cover in consideration of analogue data; Plant propagation and/or supply methods including using seeds/spores of local provenance where feasible; Establishment methods to maximise rehabilitation success such as seed treatments, seed spreading, timing of seeding to suit best local climatic conditions, hydro seeding, transplanting; Topsoil management addressed in Section 4.4 Process for identification outlined in Section Seed supply addressed in Section 4.7 Propagation of tubestock addressed in Section Methods for direct seeding addressed in Section Transplanting addressed on Section (xv) Weed control Weed control addressed in Section 4.9 (xvi) (xvii) Sourcing habitat structures for native fauna and installation methods in consideration of matching analogue data; Ongoing maintenance program for rehabilitated areas; and The installation of habitat structure is addressed in Section 4.8 The sourcing of habitat structures is addressed in Section 4.1 Ongoing maintenance addressed in section 4.12 (xviii) Rehabilitation monitoring program as required by conditions (H13) and (H14) of this environmental Rehabilitation monitoring program outlined in Section 9 Doc Ref: Q MP-006 Revision: 3 Page 19 of 95

20 EA Condition authority; and Section of Rehabilitation Plan where addressed (c) Timeframes for commencing rehabilitation of significantly disturbed areas not required for the ongoing conduct of the petroleum activity(ies), not greater than three (3) months for the rehabilitation of buried pipelines and not greater than nine (9) months for any other disturbed area. H3 The holder of this environmental authority must implement the Rehabilitation Plan. Outlined in the introduction to Section 5 Outlined Section Coordinator General s Conditions The Co-ordinator General s conditions for the Australia Pacific LNG Gas Fields were provided in November 2010 within the Coordinator General s Report on the EIS (The Coordinator General 2010). Table 7 shows where these conditions are addressed within the Rehabilitation Plan. Table 7: Details of Where the Co-ordinator General s Conditions are Addressed Requirement Source Requirement Section of Rehabilitation Plan where addressed Conditions that apply to the whole project gas fields, gas transmission pipelines and LNG facility Part 1 General Conditions that apply to the Gas Fields Part 2 Environmental Condition 6, Stock routes The parts of the stock route network disturbed or affected by the works must be rehabilitated upon completion of the project to a state that is safe for travelling stock and drovers, and the travelling public, and is consistent with the area s pre-disturbance state unless otherwise agreed by EHP and the local government. Condition 15 Borrow Pits Prior to the construction of borrow pits the proponent must undertake an assessment of the environmental values, potential impacts, mitigation measures for the sitting, construction, operation, decommissioning and rehabilitation of borrow pits required for petroleum activities and will provide this assessment to the administering authority. Section 7.9 Section 5.12 Conditions that apply to the Gas Fields Part 2 Environmental Condition 18 Dam decommissioning Decommissioned dams are to be rehabilitated and the landform must be reinstated such that it will not function as a dam and will be stable and sustainable for the foreseeable future (unless otherwise negotiated with landholders). A minimum depth of 0.25m topsoil must be placed over decommissioned storage dams to ensure an adequate vegetal cover can be Section 5.7 and Section Doc Ref: Q MP-006 Revision: 3 Page 20 of 95

21 Requirement Source Requirement Section of Rehabilitation Plan where addressed Conditions that apply to the Gas Fields Part 1 Environmental Conditions that apply to the Gas Transmission Line Part 2, General Conditions established. Recommendation, Strategic Cropping Land It is recommended that the proponent should have regard to SCL policy framework published in August 2012 by DERM when determining gas field development locations Condition 9, GQAL The proponent must include provisions in the EM Plan for the gas pipeline, ensuring that, on land identified as being good quality agricultural land (GQAL), The pipeline contractor must: a. on completion of construction, remove temporary access tracks b. on completion of construction, lightly rip disturbed areas, replace topsoil and return the surface to a land use condition that serves the preconstruction use c. on completion of construction, implement land management and erosion control measures d. on land with GQAL class A, B or C1, bury the pipeline to at least 0.9m below finished land surface, or greater if deep ripping is a normal practice. Section 7.7 a. Section b. Section and c. Section 5.5 d. Section Doc Ref: Q MP-006 Revision: 3 Page 21 of 95

22 4. Rehabilitation Methods This section outlines a general rehabilitation method irrespective of the infrastructure type. The infrastructure types to which particular techniques apply are outlined at the start of Section 5, which outlines the infrastructure types. Note that for many infrastructure types, certain areas will be required to remain treeless during Project operations. These areas will require rehabilitation after construction. Reinstatement will involve the reinstatement of soil and re-seeding with pasture grasses or native grasses and ground cover species. In some situations final re-profiling of the landform may not take place during reinstatement, and will take place on the completion of operations. An example of this is a well pad where a cutting is required to create a level surface, and the well pad is required to remain open during operations. Final rehabilitation, including return of woody native vegetation, where required, will take place once infrastructure is no longer required. The typical steps in the rehabilitation process are outlined in Figure 1-3 Note there will be variations in the process depending on the scale of the significant disturbance, magnitude of the impact and type of infrastructure. Doc Ref: Q MP-006 Revision: 3 Page 22 of 95

23 Figure 1: Flow Chart: General Rehabilitation Process Area identified as requiring infrastructure Undertake environmental surveys as required and analogue surveys: Section Locate infrastructure based on project and field planning. Obtain landholder approvals. Clear vegetation, stockpile material and mulch: Section 4.1 Undertake erosion and sediment controls throughout the process, commencing from installing sediment fences before clearing, where required, until ready for revegetation: Section 4.5 Remove and stockpile topsoil: Section and Install infrastructure: Refer to infrastructure installation processes, Section 5 Backfill any trenches with subsoil, and undertake reprofiling: Section and Disturbance Completed, is the area required to remain vegetation free for the duration of project operations? No wait until project completion for final rehabilitation, and commence reinstatement. Yes commence rehabilitation Reinstatement Rehabilitation Backfill, rip and scarify, and respread topsoil: Section , and reseed with grasses as required: Section Natural regeneration if soil is not removed: Section Once ready for final rehabilitation, undertake reprofiling (Section 4.4.6) if not already undertaken, and spread stockpiled topsoil (Section 4.4.8) Backfill, reprofile, rip and scarify, and respread topsoil: Section Determine final land use objective once ready for final rehabilitation (continue to Figure 7 for agriculture or Figure 8 for native vegetation) Doc Ref: Q MP-006 Revision: 3 Page 23 of 95

24 Figure 2: Flow Chart: Revegetation Process for Agricultural Land Grazing Land Undertake seeding with an appropriate pasture grass mix as agreed with land holders: Section Cropping Land Undertake seeding with an appropriate pasture grass mix as agreed with land holders: Section Irrespective of rehabilitation type, undertake ongoing weed management: Section 4.9 and pest management Section 4.10 Check Rehabilitation is completed to standard: Section 9 then commence maintenance: Section 4.12 Commence monitoring of stability and erosion and Grass Check (grazing land): Section 9 Monitoring identifies that rework is needed No rework needed Determine final land use objective once ready for final rehabilitation (continue to Figure 7 for agriculture or Figure 8 for native vegetation) Undertake rework: Section 4.13 Final soil and land capability and land holder survey after five years and Grass Check monitoring determines that success criteria have been met. Obtain sign off from the regulator that Doc Ref: Q MP-006 Revision: 3 Page 24 of 95

25 Figure 3: Flow Chart: Revegetation Process for Native Vegetation EVNT and MNES Fauna Check Species s for requirements to include habitat or food species in seed mix or tubestock planting: Section 7.4 EVNT and MNES Flora Check Species s for requirements and undertake tubestock planting, or include species in seed mix: Section 7.3 Native remnant and nonremnant vegetation Check analogue surveys of the specific Regional Ecosystem for appropriate species to include in seed mix, purchase seed and undertake seeding and tubestock planting if required: Section Watercourse Crossings Ensure all erosion and sediment control and other protection measures are in place: Section Undertake seeding with grasses to stabilise exposed banks, and include seed of riparian species: Section Return mulch, logs and rocks to recreate fauna habitat: Section 4.8 Check rehabilitation is completed to standard: Section then commences maintenance: Section 4.12 Check rehabilitation is completed to standard: Section 9. and then commence monitoring of erosion, stability, vegetation cover, diversity, fauna habitat structure etc.: Section 9 Irrespective of rehabilitation type, undertake ongoing weed management: Section 4.9 and pest management: Section Undertake fuel reduction if required to protect ESAs: Section Monitoring identifies that rework is needed No rework needed Undertake rework: Section 4.13 Final monitoring after five years including erosion, stability, vegetation cover, diversity, fauna habitat etc. shows success criteria have been met. Obtain sign off from the regulator that rehabilitation is complete. Doc Ref: Q MP-006 Revision: 3 Page 25 of 95

26 4.1 Vegetation Clearing and Mulching During vegetation clearing in densely vegetated areas, mulching of timber may be required, but some vegetation may be retained without mulching for re-spreading and habitat re-creation. Cleared vegetation must be stockpiled in a manner that facilitates re-spreading or salvaging and does not impede vehicle, stock or wildlife movements (Combabula EA, Schedule D, D9). The cleared and stockpiled vegetation will provide a source for habitat structures for native fauna during rehabilitation (Combabula EA, Schedule H, H2 (b) (xvi). The general procedure for the clearing, mulching and stockpiling of vegetation is as follows: mature trees will be identified, and where possible clearing will be avoided (Combabula EA, Schedule D, D6d) prior to commencing vegetation clearing, trees with hollows or potential nesting sites will be checked for the presence of arboreal fauna by a suitably qualified environment advisor larger logs, hollows and rocks, in particular, may be retained for habitat recreation a suitable machine will be used to mulch vegetation after clearing mulched and cleared vegetation will be stockpiled to facilitate re-spreading or salvaging within well pad leases, the mulch will be stored at the edge of the lease for later spreading, along pipeline routes it will be stored in windrows along the edge of the ROW, with gaps left to facilitate fauna movement mulch stockpiles will be stored suitably for reuse. 4.2 Waste Management and Removal Waste products with no further use may be generated during the rehabilitation process. All waste will be removed on the completion of rehabilitation and appropriately disposed of, including flagging, signage, surplus pipeline, litter, tree guards and stockpiles of unsuitable or surplus material. Opportunities to eliminate the generation of wastes from the rehabilitation process will be sought through the monitoring of the types and volume of wastes generated with a view to substitute a product/or material where possible. Opportunities to reuse waste streams, recycle produced wastes whether internally or via an external service provider or operation and assess these options as a viable waste management method will be reviewed. Where no other option is available wastes are to be disposed of in accordance with the relevant regulatory requirements and the requirements of the following documents: Australia Pacific LNG Upstream Waste (Q MP-0001) Australia Pacific LNG Upstream Biosecurity (Q-LNG01-15-MP-0110) Origin Energy HSEMS Environmental Effects and Management Directive: Material and Waste (ORG-HSE-DVE-020). Waste removal will be undertaken as outlined below: all general waste will be removed from the site and sent to a recycling facility or disposal facility licensed to accept the waste under the EP Act all regulated waste will only be removed from the site by a person who holds a current authority to transport such waste under the provisions of the EP Act and sent to a recycling facility or disposal facility licensed to accept the waste waste will not be burned or be allowed to be burned on the site. Doc Ref: Q MP-006 Revision: 3 Page 26 of 95

27 4.3 Natural Regeneration Trees and shrubs will be allowed to regenerate naturally on cleared areas not required to be kept tree free for the purpose of operation and maintenance, where the re-establishment of native vegetation is the final land use objective. This will reduce barriers to fauna movement, especially to ground-dwelling fauna. Natural regeneration is especially important for Brigalow communities where the dominant species Acacia harpophylla (Brigalow) re-establishes through root suckering. However, natural regeneration is only likely to occur in areas where the topsoil, which contains roots, seeds and other vegetative propagules, is not removed, or if removed and stockpiled, is placed back immediately before the soil seed bank declines. As such, natural regeneration will only be solely relied upon in areas where vegetation is required to be removed for construction, but soil does not need to be removed, such as clearing of ROWs. In all other situations regrowth will be supplemented with direct seeding. Where soil does not require removal, root stock will be left in the ground where practicable to facilitate rapid regrowth and soil stabilisation. 4.4 Soil Management Soil Management Groups A range of soil types occur within the Combabula Gas Field development area. For the purposes of this Rehabilitation Plan, the wide range of soils has been amalgamated into a series of soil management groups (Table 8). Figure 6 of the Combabula Plan of Operations depicts soils of the Combabula field. Each soil management group consists of soil types that have similar profile features as well as similar chemical and physical properties. Table 8: Soil Management Groups Soil management group Soil group classification Australian Soil Classification Soil characteristics A rudosols shallow stony/skeletal soils (includes rock outcrop) B a sodosols, chromosols, kurosols b sodosols, chromosols, kurosols C vertosols, dermosols D a vertosols dermosols b vertosols, dermosols shallow texture contrast soils and shallow earths medium to deep texture contrast soils non cracking clays and medium/deep earths/gradational soils grey/brown/dark cracking clays gilgaied soils: grey/brown/dark cracking clay with melon-hole surface Erosion rating low to moderate moderate to very high low to moderate low to moderate low low (Source: Remediation, Rehabilitation and Recovery Monitoring Program, version2, 2 August 2011) Texture contrast soils and cracking clays are the primary soil types within the Combabula development area with Vertosols also present. Other than the Vertosols these soil types mainly have shallow sandy or loamy topsoil with an abrupt change to a medium to heavy clay subsoil. These texture contrast soils commonly have subsoils which are dispersive and very susceptible to erosion, particularly the Sodosols. Shallow gravely loams (Rudosols), with a predominance of surface stone, are also common within the Development Area. While Rudosols have a low to medium erosion potential their thin topsoils may necessitate the importing of topsoils from elsewhere during soil reinstatement. Requirements for importing topsoil are outlined in section Shallow to deepcracking and non-cracking clays (Vertosols) are also present within the Development Area. Doc Ref: Q MP-006 Revision: 3 Page 27 of 95