Gas Transmission Pipeline EMP. Draft

Transcription

1 B2 Gas Transmission Pipeline EMP Draft

2 12 J:\Jobs\ \6 Deliv\GLNG EIS Supplement Final for Stakeholder Release\B. Revised EMPs\B2 Gas Transmission Pipeline EMP\Part 3_B2 Gas Transmission Pipeline EMP_Final.doc GLNG Project - Environmental Impact Statement Supplement GLNG PROJECT - ENVIRONMENTAL IMPACT STATEMENT SUPPLEMENT 12.1 Introduction The purpose of this preliminary Environmental (EMP) prepared for the GLNG Project is to propose environmental protection commitments to protect the environmental values that may be affected by the development of the project and to assist the administering authorities to decide the appropriate approval conditions for the project (under Section 310D of the Environmental Protection Act 1994 (Queensland) (EP Act). EMPs are designed to be dynamic documents, which will be reviewed and revised as the project progresses through public consultation including feedback from regulatory agencies including the Queensland Department of Environment and Resource Management (DERM) and the Commonwealth Department of Environment, Water, Heritage and the Arts (DEWHA), detailed design, to construction, operational and decommissioning phases. It is envisaged that the final EMPs for each component of the project will provide additional, more detailed guidance for construction and operational personnel, regulators and stakeholders prior to the application for the respective environmental authorities. The EMPs will contain clear commitments, framed in a way that enables assessment of the extent to which the commitment has been met. The following five preliminary EMPs were prepared as part of the EIS process for the GLNG project: Coal Seam Gas Fields EMP; Gas Transmission Pipeline EMP; LNG Facility EMP; Marine Facilities EMP; and Access Road and Bridge EMP. Each EMP has been prepared as a stand alone document, to be used as the basis for actively managing activities as the project progresses. This preliminary EMP has been prepared based on the findings outlined in Section 7 of the EIS (March, 2009) and additional work undertaken during the preparation of the EIS Supplement. It relates to construction and operation of the gas transmission pipeline. This preliminary EMP has been structured to be in accordance with the project s Terms of Reference (TOR) and to satisfy the requirements of the DERM guidelines and related operational policies as outlined in Table below. The EMP proposes environmental management strategies to prevent or minimise environmental harm while allowing for environmentally sustainable development. Monitoring, corrective actions and reporting requirements form part of this EMP, which will ensure that the proposed management strategies are being properly implemented. Table EMP Structure Structure Element/issue Performance Criteria Monitoring Description How elements of the activity (construction or operation) are to be managed (as it affects environmental values). The operational policy or management objective that applies to the element. Measurable performance criteria (outcomes) for each element of the operation. The strategies, tasks or action programs (to nominated operational design standards) that will be implemented to achieve the performance criteria. The monitoring requirements to measure actual performance (i.e. specified limits to pre-selected indicators of change). The auditing requirements to demonstrate implementation of agreed construction and operation environmental management strategies and compliance with agreed performance criteria. 12.1

3 Structure Reporting Description Format, timing and responsibility for reporting and auditing of monitoring results. The action (options) to be implemented in case a performance requirement is not reached and the person(s) responsible for action (including staff authority and responsibility management structure). This preliminary EMP will be refined and finalised after negotiation as agreed with DERM, then used to support the necessary applications for environmental authorities (petroleum activities) for respective pipeline licenses issued under the Petroleum and Gas (Production & Safety) Act 2004 and/or the Petroleum (Submerged Lands) Act s The objectives of this EMP are to provide: Evidence of practical and achievable plans to ensure that the project s environmental requirements are complied with; An integrated plan for monitoring, assessing and controlling potential impacts; Local, State and Commonwealth authorities with a common focus for approval conditions and compliance with policies and conditions; and The community with evidence that the gas transmission pipeline development will be managed in an environmentally acceptable manner. This EMP will be reviewed and updated, to reflect knowledge gained during the course of the assessment of the GLNG Project. Changes to the EMP will be made in consultation with the relevant authorities where necessary Links to the EIS Potential environmental issues requiring management and monitoring were identified during the impact assessment process and detailed throughout the GLNG EIS. This EMP has been structured to provide a link between the proposed authorised activities, the receiving environment and the selection of appropriate management strategies to prevent or minimise any potential environmental harm arising from the development of the GLNG Project. The EMP also incorporates monitoring and corrective actions to ensure compliance with the commitments made in the EIS and the conditions of any statutory approvals. The management strategies outlined within this EMP were selected after detailed investigations of potential environmental impacts assessed during the EIS process. A number of other key aspects of construction, operation and decommissioning phases for the gas transmission pipeline have been included such as weed management, emergency response procedures and incident management Legislation Section 1 of the EIS specifies the legislation and policies controlling the approval process for the gas transmission pipeline. Appendix C of the EIS provides a list the development approvals required for the GLNG Project including the gas transmission pipeline. Environmental requirements of all relevant legislation are addressed within the EMP. The requirements of local government, the community and other stakeholders have also been addressed. 12.2

4 12.5 Santos Environment, Health and Safety Management System (EHSMS) Santos has a company-wide EHSMS which provides a structured framework for effective environmental and safety practice across all of its activities and operations. The framework has been developed to ensure compliance with AS/NZS ISO 14001:1996 Environmental Management Systems Specification with guidance for use and Australian Standard 4801:2000 Occupational Health and Safety Management Systems Specification with guidance for use. The EHSMS framework consists of multiple layers, the key components being management and hazard standards that have been developed as part of the EHSMS. These standards guide the implementation of the EMPs. The management standards define the requirements necessary to ensure that environmental (health, safety and process safety) risk is systematically managed. The elements of each Standard will be appropriately incorporated into this EMP Responsibilities Santos will be responsible for ensuring that this EMP is implemented. The assignment of roles, responsibilities and accountability will be in accordance with the EHSMS. Santos staff and contractors will be responsible for implementing the final EMP in a manner which complies with all relevant environmental standards, adheres to all legislative requirements, and ensures that all environmental objectives associated with the work are achieved. Contract documents will include the necessary environmental specifications and commitments and require compliance with the EMP, construction specifications, technical drawings and the general environmental duty Monitoring Programs Monitoring programs will be undertaken in accordance with this EMP. Routine environmental monitoring of the gas transmission pipeline will be conducted to ensure performance standards put in place are met. Monitoring, undertaken by GLNG operational and corporate personnel and specialist service providers, will be periodically conducted in accordance with site-specific monitoring plans. Specialist studies to investigate particular aspects of the environment (e.g. flora and fauna, weeds, hydrological risk) will be periodically commissioned when a need is determined during environmental review and risk assessment This preliminary EMP will be finalised after the issue of the Coordinator-General s conditions. During construction and operations, compliance audits will be conducted in accordance with the requirements of this EMP as well as construction procedures, relevant legislation, license and permit conditions and industry standards. To ensure appropriate stakeholders are adequately informed of relevant EHS performance, reports, where necessary, will be prepared for internal and stakeholder review. All inspection and audit reports of environmental performance will be stored in the Audit and Inspection Manager (AIM). AIM is an electronic database that is used to enable corrective actions identified during the inspection / auditing process to be recorded, tracked and closed out. The information will be made available to the relevant regulatory authorities as required. In addition to the monitoring and reporting requirements documented in the relevant sections of the EMP, the following auditing regime will be implemented: 12.3

5 During construction, the contractor will be required to report on environmental compliance on an incident, weekly and monthly basis; During construction, internal audits will be undertaken at regular intervals to verify that all work is proceeding in accordance with the EMP; A post-construction audit of the gas transmission pipeline right of way and other related infrastructure will be conducted annually for two years following construction to evaluate revegetation, erosion and soil stability, weed control, watercourse alteration prevention and success of bed and bank reprofiling; and During the operational phase of the gas transmission pipeline, internal audits of environmental compliance will be undertaken on a regular basis. Section 37 of the EP Act requires that any person who becomes aware of any event that may cause or has caused environmental harm, reports the event/incident to their employer. Details of the nature and circumstances of the event must be provided. Any environmental incident, hazard, near miss, non-conformance or third party complaint will be managed in accordance with this EMP and recorded in the Incident Management System (IMS), an electronic notification and recording system. All non-conformances lodged are tracked and actioned by nominated personnel, which includes the investigation and implementation of corrective action where required. Regulatory agencies will be notified of any reportable environmental incident or non-conformance with statutory approvals within the appropriate timeframe and as soon as practicable. Relevant records supporting inspections and audits (in addition to monitoring and other critical aspects of the management system) will be generated and maintained. In accordance with the various statutory approvals required for the project, Santos will report annually to the administering authorities on the petroleum activities undertaken during the previous 12 months Training and Communications All Santos personnel, contractors and visitors are required to undertake appropriate environmental training and induction programs. This standard identifies and records the competencies and training results from the assessment of all staff and contractors. All managers and supervisors will be responsible for ensuring that personnel under their control have the requisite competencies, skills and training to carry out their assigned tasks in accordance with the requirements of the EMP. They will also be responsible for identifying additional training and competency requirements. All staff will complete a comprehensive project induction. The induction will include a comprehensive review of environmental requirements and standards, safety, and access protocols. All project supervisors and managers will have additional detailed training on the use and implementation of the EMP. All managers and supervisors will hold regular toolbox meetings with personnel to discuss issues associated with their scheduled work. This will include highlighting and discussing relevant environmental issues Review This EMP will be a dynamic document. The EMP will be reviewed regularly and revised to reflect project changes and new developments. Revisions will include, but not be limited to: Inclusion of relevant approval conditions arising from the project s approval and subsequent permits, authorities and/or licenses; and 12.4

6 Inclusion of any site-specific elements relevant to new developments as they occur during the life of the project. Additional revisions will occur on an as-needed basis, including revisions to address items identified during incident investigations, inspections or audits. Santos will be responsible for regular review of the EMP to achieve continuous improvement in environmental performance Description of Relevant Petroleum Tenures Santos proposes to construct a high pressure gas transmission pipeline that will transport CSG from the CSG fields at Roma, Fairview and Arcadia Valley to the proposed LNG facility on Curtis Island. The gas transmission pipeline will require one or more pipeline licences issued under the Petroleum and Gas (Production & Safety) Act 2004 and/or the Petroleum (Submerged Lands) Act Separate environmental authorities will be required for each pipeline licence. Section 3 of the EIS provides a detailed description of the proposed gas transmission pipeline and the preferred pipeline route for the GLNG Project. The gas transmission pipeline will be a buried, high pressure steel pipeline. It will be designed in accordance with the requirements of AS 2885 Pipelines Gas and Liquid Petroleum and constructed in accordance with the Australian Pipeline Industry Association s Code of Environmental Practice (APIA, 2005). The proposed gas transmission pipeline corridor is closely aligned with the existing Queensland Gas Pipeline (QGP) for much of its length with the exception of the section north of Injune where the corridor will run up the western side of the Arcadia Valley. The pipeline will approach Gladstone from the southwest and will pass through the Gladstone State Development Area (GSDA) before crossing Port Curtis to Curtis Island. The length of this route is approximately 435 km. The proposed gas transmission pipeline will be located adjacent to the existing QGP right of way (ROW) for approximately 300 km of the corridor from south of Rolleston to Gladstone. This will reduce the area of land disturbed and the impact on existing land use and infrastructure. However there are sections along the corridor where due to land use, environmental or topographical constraints the proposed GLNG pipeline will by necessity deviate from the QGP ROW. The criteria used to determine the most appropriate route for the gas transmission pipeline were based on the APIA (2005) code and Australian Standard AS2885. The gas transmission pipeline will have the following above ground infrastructure along the pipeline ROW: Mainline Valves. A mainline valve (MLV) is a buried valve with an above-ground bypass valve and blowdown piping. MLVs are used for isolating sections of the pipeline and venting gas to enable maintenance activities or in the event of an incident. Scraper Stations. Scraper stations are used for inserting and removing in-line cleaning and inspection tools to enable cleaning, maintenance and assessment of pipeline integrity. Gas Receival and Metering Stations. A gas receival station will be constructed at the LNG facility on Curtis Island where the gas will leave the gas transmission pipeline. The gas receival station will consist of a station limit valve, scraper receiver, gas filters and flow control equipment together with metering. CP Test Posts. CP Rectifier Station. Warning Signs. Pipeline warning signs will be erected along the gas transmission pipeline ROW in accordance with AS Aerial pipeline markers will be installed along the pipeline and denote the chainage in kilometres from the start point. Aerial markers will be at 10 km intervals. 12.5

7 Section 7 of the EIS provides real property descriptions, mining and petroleum tenures that are traversed by the gas transmission pipeline corridor and the relationship with disturbance types, identifies the topographic features, places and/aspects of potential interest to the administering authorities or other relevant stakeholders. Section 9 of the GLNG EIS identifies all relevant stakeholders and details the consultation process that was undertaken for the gas transmission pipeline during the preparation of the EIS Description of Relevant Petroleum Activities Section 3 of the GLNG EIS provides a detailed description of the relevant petroleum activities that will be undertaken as part of the construction and operation of the gas transmission pipeline for the project. The section includes a description of: The type and scale of the proposed petroleum activities; The petroleum operations and environmentally relevant activities carried out on the site; The planned project life identifying construction, operation, decommissioning and rehabilitation phases; Activities which may cause environmental harm; and Strategies for the rehabilitation and remediation of environmental harm caused by petroleum activities. A summary of the typical construction procedures and activities is provided below. Survey of the pipeline route. Provision of access tracks and temporary facilities. Existing roads will be utilised as far as practicable to minimise disturbance to the surrounding areas. Access tracks will be positioned and constructed in consultation with landholders. Clear and grade the ROW. The gas transmission pipeline route will be marked, vegetation and other obstacles removed from the ROW, topsoil removed and stockpiled. Temporary fencing and gates will also be installed to allow easy access between properties. Pipe stringing and bending. The pipe will be laid out in preparation for welding and pipes bent as required by route and terrain. Pipe welding and Non-Destructive Testing (NDT). The pipe will be welded into long lengths, typically up to 1000 m, called pipe strings. Trenching. A pipeline trench will be excavated, with the subsoil stockpiled adjacent to the trench. Pipe placement in the trench (lowering in and laying). The trench spoil, where suitable, will be used as bedding and backfill for the pipeline. The pipe will then be lowered into the trench using side boom tractors and the trench backfilled and compacted. In addition, marker tape will be laid in the trench at designated areas. Hydrotesting. The gas transmission pipeline will be cleaned and gauged prior to being hydrostatically tested for strength and leaks. Rehabilitation. Following construction, rehabilitation will involve removal of construction material, surface re-contouring, fence repair, respreading of topsoil and vegetation and seeding/revegetation. The construction of the submerged gas transmission pipeline that crosses Port Curtis between Friend Point and Laird Point will require a different suite of techniques. The gas transmission pipeline will be laid in a trench below the sea bed and backfilled with rock for protection. Construction techniques to install the pipeline may include: Cable pull the pipe is fabricated onshore and is winched through a pre-prepared trench; Lay barge progressively constructing / laying the pipeline; or 12.6

8 Floatation fabrication of the pipe string onshore and floating it to the crossing location before sinking it into position. The layer of rocks will act: As additional buoyancy protection; As mechanical protection from vessels (e.g. anchors, hulls); and To limit scouring due to tidal flows. The construction techniques that will be chosen will be determined during the front end engineering design (FEED) process to reflect design and operational requirements, local conditions and any regulatory requirements. Section 5 of the EIS provides a detailed waste inventory for the gas transmission pipeline. A comprehensive waste management plan will be developed that details the proposed source, nature, composition, rate and the immediate or ultimate destination of wastes generated during the construction and operation of the gas transmission pipeline. A description of waste management is provided in this EMP Description of Environmental Values, Potential Impacts and Proposed Management Strategies Section 7 of the EIS provides a detailed description of the environmental values that occur along the gas transmission pipeline corridor, the potential impacts from the proposed activities, environmental protection objectives and management strategies to mitigate those impacts. The potential impacts on environmental values that were identified through the EIS process form the basis for developing the most appropriate mitigation measures. The assessment of the beneficial or adverse effects has included an assessment of the following aspects: Magnitude or relative size of impact in relation to the environmental value being affected; Severity of any adverse effect or scale of beneficial outcome; Duration of the effect, for example the impact may range from a seasonal change, or it may end with the petroleum activity or extend beyond cessation of the petroleum activity; and An indication of the level of uncertainty and any assumptions used to address the uncertainty in any of the data or proposed commitments to protect the environmental values. In relation to Sections 11.10, and of this EMP, the GLNG EIS provides appropriate maps, plans and/or aerial photographs to identify the location of the gas transmission pipeline, related infrastructure and environmentally sensitive areas Rehabilitation Program and Financial Assurance This EMP incorporates a rehabilitation program and decommissioning plan for the gas transmission pipeline. Sections 3 and 7 of the EIS outline the rehabilitation objectives, performance criteria and strategies that will be employed for rehabilitating the areas disturbed during the construction phase of pipeline. The EP Act requires the holder of an environmental authority (petroleum activities) to provide a financial assurance in the amount and form required by the administering authority (the DERM) as security to ensure compliance with an environmental authority or to cover costs or expenses, or likely costs or expenses, associated with rehabilitation of disturbed areas should the holder default on their rehabilitation obligations. The calculation of financial assurance must be in accordance with the DERM guideline document Financial Assurance for Petroleum Activities. The amount of financial assurance may change over the life of the project. The amount is defined as the maximum total rehabilitation cost to complete rehabilitation of all disturbed areas at any one time, which 12.7

9 may vary on an annual basis due to progressive rehabilitation. This includes any disturbance that occurred under a prerequisite or replaced petroleum authority. The amount required for the financial assurance must be the highest total rehabilitation cost calculated for any year of the EMP. During the application stage for the relevant environmental authority, Santos will calculate the required financial assurance for the initial construction and operation of the gas transmission pipeline. The financial assurance will be calculated using the DERM guidelines and will be regularly reviewed in accordance with any statutory requirements Overview The gas transmission pipeline EMP consists of construction and operational elements Construction Activities The construction elements of the EMP consist of: Access; Clearing and Grading; Pipe Stringing, Welding and Non-Destructive Testing (NDT); Trenching; Pipe Laying and Backfilling; Hydrotesting; Rehabilitation; Terrestrial Flora and Fauna Management; Marine Flora and Fauna Management; Mosquito and Biting Midge Management; Weed Management; Water Management; Soil Management; Waste Management; Chemical and Dangerous Goods Management; Noise and Vibration; Air Quality; Transport and Traffic Management; Cultural Heritage; Social and Community; Third Party Infrastructure; Emergency Response; Fire Management; and Incidents and Complaints Operational Activities Prior to commencement of operations, the EMP will be reviewed and updated to: Include the organisational structure for operations and allocation of responsibilities in line with the organisational structure; 12.8

10 Establish reporting structures based on the organisational structure; Include relevant approval conditions arising from the approval process and subsequent permits, authorities and licences relevant to the pipeline's operation; Review control strategies, objectives and performance indicators to ensure that these are appropriate for operations; Include reference to as constructed" drawings, particularly those that reference areas of environmental sensitivity; and Review inspection and audit schedules and inclusion of specific locations where a higher level of inspection is required (e.g. to monitor rehabilitation success of sensitive areas). The key operational activities that may have an impact on environmental values are: Access to the ROW; Maintenance of the ROW, involving management and/or control of vegetation, weeds, pests, bushfire, erosion and sedimentation, pipeline subsidence, cultural heritage and third party infrastructure/landuse; Maintenance of the pipeline, including excavation, hydrotesting, pigging, and welding. Where maintenance activities to be undertaken are similar to construction activities, the activity-based management plans presented in the construction EMP will apply; Operation of the pipeline involving management of leaks and emergency response; and Monitoring activities including patrols, inspections, marine and aerial surveys Operational Monitoring The GLNG gas transmission pipeline is to be monitored remotely from a gas control centre via supervisory control and data acquisition system Ground Patrols Regular inspections will be carried out along the pipeline ROW by vehicle and foot patrols to check on the condition of the ROW and identify any activities that may have the potential to impact on the integrity of the pipeline. The inspection will include, but not be limited to, a review of: Activity on the pipeline corridor and in the vicinity; Use of access tracks and pipeline corridor and any unauthorised traffic; Access track condition and maintenance requirements; Evidence of erosion, washouts or land subsidence; Evidence of pipeline exposure; Vegetation cover; Excess vegetation on the pipeline corridor; Weed and pest infestation; Condition of pipeline crossings; Disturbance to protected heritage sites; Indications of leaks; The presence of refuse or litter; Damages to fences, gates, signs, markers etc; and Security of sites and evidence of unauthorised entry. 12.9

11 The frequency of ground patrols will be determined during the FEED as part of the Integrity Management Plan (IMP). Special patrols will be undertaken after heavy storms or significant events to check for damage to the pipeline Aerial Surveillance Aerial patrols along the pipeline ROW will be undertaken on a regular basis. The frequency of aerial patrols will be determined during the FEED process and will reflect operational requirements, local conditions and regulatory requirements. Aerial surveillance will check for: Bare patches or damaged vegetation (indicating possible leaks or erosion); Pipeline exposure; Scouring, sink holes, areas of active or potential erosion; Condition of water crossings; Noxious weed areas; Ploughed areas and/or evidence of third party activity; Areas of limited revegetation success; and Vegetation regrowth that will require control Marine Surveillance The submerged gas transmission pipeline from Friend Point on the mainland to Laird Point on Curtis Island will be regularly inspected to confirm that the backfill protection to the pipeline is intact and has not been degraded. The inspection will be mainly visual, supplemented as-and-when required by seabed profiling using echo-sounding or similar equipment Internal Pipeline Inspections Internal pipeline inspections to monitor the integrity of the pipe will be carried out by intelligent pigs on an as-required basis. The initial frequency of intelligent pigging will be determined during the FEED process as part of the IMP to reflect operational requirements, local conditions and regulatory requirements Cathodic Protection Surveys A cathodic protection system will be installed along the gas transmission pipeline and will be checked on a regular basis. The frequency of checking the cathodic protection system will be determined during the FEED process as part of the IMP to reflect operational requirements, local conditions and regulatory requirements. Similarly, the location and numbers of test points will also be determined during the front end engineering design process to reflect design and operational requirements, local conditions and regulatory requirements Issue Specific Monitoring Areas that require a high level of monitoring, such as water course crossings, will be identified and incorporated into the operations monitoring program. Special ground, marine and/or aerial patrols may be undertaken after heavy storms or earthquakes to check for damage to the ROW Decommissioning The EMP includes a decommissioning element outlining the implementation strategies, monitoring, auditing, reporting and corrective actions at pipeline end-of-life

12 12.16 Environmental - Construction Access or Management Performance Criteria Access To provide access to gas transmission pipeline operations in a manner that is acceptable to stakeholders and is compliant with our licence conditions, EMP and statutory obligations. To utilise, to the extent practicable, existing cleared areas and access tracks so as to: Minimise impacts to native flora and fauna; Minimise impacts to soil and water; Reduce the likelihood of the spread of weeds; Minimise impacts on visual amenity; Minimise the number of access tracks and diversions; Minimise disruptions to landholders and third parties; Manage road and track usage, and achieve satisfactory road and site rehabilitation; and Minimise damage to existing road networks. No warranted complaints from landholders, and warranted complained responded to within 2 working days. Access tracks and work areas/sites are readily manageable and able to be rehabilitated using standard techniques. Erosion and sediment control in place. No spread of weeds and compliant with the Weed. Existing environmental values protected. Santos and/or the pipeline contractor will liaise with all residents along the pipeline corridor prior to any construction activities taking place to ensure that residents are fully informed of the proposed nature, timing and location of the construction works and any site specific mitigation measures to be implemented. Route alignment, location of accommodation facilities, storage and additional work areas and new access tracks will be based on, to the extent practicable, the following criteria: Avoiding unduly steep or rugged terrain. Avoidance of areas of significant environmental value. Avoidance of areas subject to flooding. Avoidance of conflicting land uses. Maximise the use of existing roads and tracks. Minimise the width of tracks. Landholder requirements. Provision of adequate road access. Proximity to existing infrastructure. Existing roads and tracks will be used where practicable. If necessary, existing tracks and roads will be upgraded to the applicable engineering design standards and the following will apply: Roads or other structures on floodplains will be orientated and constructed so as not to divert or concentrate flood flows; Road heights on floodplains will not exceed 20 cm above natural ground level (NGL); and Invert levels will not be greater than 10 cm above NGL. Only designated access tracks will be used by construction vehicles, including personnel vehicles. Property access will be provided for landholders at all times. Property fences and gates will be installed, maintained and reinstated to a condition at least equal to the pre-existing condition

13 Access Gates will be left as found. If closed gates are required to be open for a period of time, they will not be left unattended unless by prior agreement with the landholder. Where access is required in the long term, tracks will be constructed with a gravel surface and maintained to permit all weather access. Where access is required for temporary (construction) use only, disturbed areas will be rehabilitated. Where new vehicle tracks are required they will generally not exceed 5 m in width. Where there is a risk of land degradation, access during wet weather will be undertaken in consultation with the relevant landholder. Temporary access tracks will be removed from land unless otherwise agreed with the landholder. Disturbed areas will be graded to a level consistent with lands adjacent, pre-stripped topsoil replaced and erosion protection measures installed. Public and private access tracks will be reinstated to the pre-construction condition. Workforce education, signage and boundary demarcation will be used to ensure vehicles remain on designated access tracks. New tracks will be located as close to fences or property boundaries as possible subject to the requirements of the landholder. Weed control measures will be implemented in accordance with the requirements of the weed management component of this EMP. Santos and/or the construction contractor will consult with all landholders prior to construction commencing to minimise fragmentation or reduced property access. Access roads will be regularly inspected to assess the effectiveness of protection measures with particular attention to erosion control, topsoil management and waste management. Monitoring of the various construction processes will occur on a daily, weekly and monthly basis. Audits will be conducted throughout the project to monitor against this EMP and other licence conditions. Recommendations and corrective actions arising from audits and reviews will be implemented. Reporting will occur on an incident, weekly and monthly basis to the appropriate Environmental Manager. Non-compliances, environmental incidents and their corrective actions will be managed through the IMS and reported to the appropriate authority as required. Landholder complaints will be recorded in a complaints register (which forms part of the EHSMS) and appropriate corrective actions will be implemented and closed out by the appropriate Environmental Manager Clearing and Grading or Management Clearing and Grading To manage the impact of site clearing and disturbance such that: Impacts on vegetation and ecological communities are minimised. Cleared material is stored appropriately and able to be effectively used during restoration activities. The rehabilitation success of the disturbed areas is optimised

14 Performance Criteria Clearing and Grading No warranted complaints from landholders, and warranted complained responded to within 2 working days. No unplanned or unapproved damage to flora and fauna. Environmental impacts are within authorised limits. Installation and maintenance of erosion control measures. Soils and vegetation stored appropriately to allow for restoration of disturbed areas to equivalent to surrounding area after construction. Compliance with the Weed. Prompt reinstatement of disturbed areas. No clearing of protected vegetation for field development will occur until appropriate permits have been obtained. All clearing boundaries and ESA s will be illustrated on construction drawings and clearly marked in the field. Clearing will be limited to the minimum area practicable. The following are examples of how this can be achieved: Having defined limits on the clearing plan; Identification of areas where clearing is restricted i.e. 30 m in ESAs; Demarcation of no go areas; and Implementing access control. Where practical, on the perimeter of the ROW, trees will be trimmed rather than felled. Individual trees to be retained or preserved on the ROW will be clearly marked in the field, before clearing activities in that area begin. The width of clearing in riparian vegetation will be minimised to safely allow construction vehicle traffic to cross the water course and meet the following environmental requirements by the following measures: Clearing in the watercourse for pipeline installation to be left until the last moment so as to expose the area for the minimal time possible; Where minimal earthworks are required, retain the root mass, especially in sodic soil areas; and Where cleared vegetation is stockpiled, measures should be taken to avoid concentration of overland flows. Where crossings traverse flowing wet watercourses, containment dams will be constructed to isolate work areas. Water flow in waterways will be maintained. The work area will be isolated from the flowing waterway. Crossings will be designed to provide for fish passage. Where practicable, bridge crossings will be designed to be single span (to minimise in-stream disturbance). Culverts will be avoided where possible and level crossings will be installed which allow the passage of heavy vehicles through the waterway but does not interfere with the flow of water. Where culverts can t be avoided, they will be designed so that they are: As short and wide as possible, and allow the passage of anticipated flood volumes and debris; Deep enough to allow fish movement (a minimum depth of 0.5 m for the fish species present); and Installed without a drop off at the culvert outlet or inlet (these impede fish migration). Cleared vegetation will be stockpiled for respreading during rehabilitation. Cleared vegetation will be stockpiled beyond the flood line of watercourses. Cleared vegetation or soil will not be pushed up against trunks of trees

15 Clearing and Grading Cleared vegetation and soil will not be stored against fence lines. Soil stockpiles will not be placed within the bed or banks of watercourses. The stockpiles will be breached in appropriate locations (coinciding with designated access roads or tracks, fence lines) to allow vehicular, stock and wildlife access. Vehicular movement over stockpiled soil will not be allowed. Soil and surface stability will be maintained at all times (e.g. temporary erosion control berms, drains and sediment barriers will be installed as necessary and maintained until final construction clean-up is completed). Water trucks will be used (particularly in hot and windy conditions), on access roads to reduce dust generation. Dust will be managed along all access tracks and work areas with a variety of dust mitigation strategies e.g. water trucks, dust suppressants and capping the area with alternative material such as gravel. Contractor to take photos of all waterway and infrastructure crossings and ESAs to be recorded for the restoration process. Vehicle speeds will be restricted on unsealed roads. Soil and Erosion Management Install, maintain and monitor erosion and sediment control devices (e.g. berms, silt fences, jute matting) so that ground is stable and vegetation cover is maintained and promoted. Ensure that runoff control devices (e.g. whoaboys) are maintained and work at all times to prevent erosion. Carry out excavation works in conformity with the provisions of the construction EMP. Install permanent erosion controls around active erosion adjacent to the ROW and watercourses as needed to keep areas stable. Remove and stockpile topsoil where excavation for subsidence remediation is to occur. Replace topsoil as soon as practicable after works have finished. Empty sediment control devices after heavy rain. Maintain sediment control devices to ensure they remain effective including emptying regularly. Consider erosion potential, sedimentation and land contamination issues when formulating incident specific emergency responses. Repair or replace damaged or ineffective erosion and sediment controls as soon as practicable. Sediment control measures will be used to preserve stockpiled soils to prevent siltation of any land surface and water or blockage of any existing drainage channels. Where erosion management structures are impacted they will be reinstated as quickly as practicable or alternative structures erected to retain an adequate level of erosion control. To ensure problem soils are avoided where practicable Santos will: Conduct pre-construction soil surveys which should identify problem soil areas that, where practical, should be avoided for locating facilities and access tracks. In sodic soil areas, the following measures will be applied: Energy dissipaters at the end of contour banks; Avoid unnecessary exposing or disturbance of sodic soils; Retention of topsoil; Capping of sodic soils with other material; and Avoiding ponding of water on site, allow water to drain from the site and disperse. Appropriate controls will be implemented during any diversion of watercourses to minimise the impact of the project on aquatic species. Measures to minimise the impacts of temporary damming of watercourses for the construction of crossings and obstruction of fish passage will be implemented and 12.14

16 Clearing and Grading include appropriate controls and monitoring during the diversion of watercourses. auditing will be conducted in accordance with.7 of this EMP. Erosion and sediment controls will be inspected before and after rain events. Inspections of the site for compliance will occur on a daily, weekly and monthly basis. Audits will be conducted throughout the project to monitor against this EMP and other licence conditions. All cleared areas will be regularly inspected to assess the effectiveness of the environmental protection measures with particular attention to areas such as clearing widths, topsoil and vegetation storage and erosion and sediment control measures. This will be overseen by the appropriate Environmental Manager. Reporting of environmental performance data will be conducted in accordance with.8 of this EMP. Reporting, investigation and management of corrective actions associated with environmental events (including incidents, hazards, near misses, non-compliance vents and third party complaints) will be managed through the use of the IMS and reported to the appropriate authority as required. Reporting will occur on an incident, weekly and monthly basis to the appropriate Environmental Manager. Landholder complaints will be recorded in a complaints register (that forms part of the EHSMS) and appropriate corrective actions will be implemented and closed out by the appropriate Environmental Manager Pipe Stringing and Welding or Management Pipe Stringing and Welding To carry out pipe stringing and welding in a safe and responsible manner with minimal interference to landholders or risk to the environment. Performance Criteria No warranted complaints from landholders, and warranted complained responded to within 2 working days. No uncontrolled fires. Fire Fighting Equipment at each hot work site. Debris removed from ROW. Pipe will be strung, allowing gaps for access across the line of pipe. Gaps will coincide with access roads or tracks, boundary fences and gaps in stockpiled vegetation, and will be located in consultation with relevant landholders. Dust and noise impacts related to pipe transport traffic will be minimised by scheduling deliveries during daylight hours where practicable. All welding, welding procedures, welder qualifications, the use of welding consumables, and the removal of weld defects will conform to relevant Australian Standards. The following precautions will be taken to minimise the possibility of fire due to welding activities: The construction area along the ROW (other than the designated stockpile areas) will be cleared of combustible vegetation to reduce the risk of fire; Stockpiled vegetation will be separated from welding activity; Water trucks (also used for dust suppression) will be available for use as fire trucks in the event of fire; and Fire extinguishers will be available to all appropriate crew members. Night caps or other appropriate devices will be placed over the open pipe string ends to prevent the ingress of dust, wildlife or other objects into welded pipes. All welding waste will be managed appropriately and removed from the ROW on a 12.15

17 daily basis. Pipe Stringing and Welding Inspections of the site for compliance will occur on a daily, weekly and monthly basis. Audits will be conducted throughout the project to monitor against this EMP and other licence conditions. The entire length of the ROW will be regularly inspected to assess the effectiveness of protection measures, with particular attention to debris control and availability of fire fighting equipment and crew preparedness. Reporting of environmental performance data will be conducted in accordance with.8 of this EMP. Reporting, investigation and management of corrective actions associated with environmental events (including incidents, hazards, near misses, non-compliance vents and third party complaints) will be managed through the IMS and reported to the appropriate authority as required. Reporting will occur on an incident, weekly and monthly basis to the appropriate Environmental Manager. Landholder complaints will be recorded in a complaints register (that forms part of the EHSMS) and appropriate corrective actions will be implemented and closed out by the appropriate Environmental Manager Trenching or Management Performance Criteria Trenching To manage the impacts of trenching activities such that: No unplanned disturbance to landholders or third party infrastructure. Erosion or subsidence is controlled. Topsoil quality is protected. Adverse impacts to native fauna are avoided. Subsoil segregated from topsoil and vegetation. Ramps and fauna exit points are installed and maintained. Access for landholders and third parties maintained. No unplanned or uncontrolled disturbance to third party infrastructure. The location of the existing third party infrastructure in the ROW will be accurately identified on the alignment sheets and marked physically on the ground prior to trenching activities. Crossing of infrastructure will be completed in accordance with agreements reached with infrastructure owners/managers. Known contaminated areas will be identified on field maps, located on site, fenced and avoided. Trenching supervisor will be instructed in process for handling previously unidentified contaminated areas (e.g. dip, waste pit) or acid sulphate soil (ASS) in the event that any such areas are uncovered during trenching. These will include: Cessation of trenching at the location. Relocation and recommencement of trenching 50 m ahead. Advising Construction Manager and completing an assessment of the potential contamination. This may require the collection and analysis of the soil. Initiating appropriate remedial action based on the assessment. This may include deviating around the site. Topsoil stockpiles will not exceed 1.5 m in height. Trench spoil (sub soils) will be stockpiled separately to topsoil and vegetation. Areas of potential ASS will be clearly marked on construction drawings. Where potential or actual ASS is disturbed during trenching, trench must be stockpiled within a contained area

18 Trenching Trench spoil will be stockpiled outside watercourses, and/or behind containment structures so as to prevent siltation of any land or surface water or blockage of any existing drainage channels. Regular gaps and spaces in the topsoil, subsoil and vegetation stockpile will be provided for fauna movement. The distances between gaps in stockpiles will be reduced at approaches to stream crossings. Trench plugs will be utilised at appropriate intervals to minimise erosion and allow access across the ROW. The pipeline trenches will be left open for the minimum time practicable. The trench will not be left open for extended periods on slopes leading to drainage lines or watercourses. Ramps will be installed in the trench to allow the easy egress of fauna trapped in the trench. In areas of high fauna density, additional ramps, branches, hessian sacks or similar devices to enable small fauna to exit the trench will be used. Temporary sediment and erosion control devices will be reinstated. The crossing method for all major road and rail crossings will be agreed beforehand with the facility owner/manager. Open cut crossing of minor roads and tracks will be managed in consultation with landholders and relevant third parties and alternative traffic management plans developed and implemented. auditing will be conducted in accordance with.7 of this EMP. Completed trenches will be regularly inspected to assess the effectiveness of protection measures with particular attention to areas such as soils management and trench compaction. During construction, the entire length of the ROW will be regularly inspected to assess the effectiveness of protection measures, with particular attention to areas such as soils segregation, erosion control devices, fauna escape ramps and access across the easement. Reporting of environmental performance data will be conducted in accordance with.8 of this EMP. Reporting, investigation and management of corrective actions associated with environmental events (including incidents, hazards, near misses, non-compliance vents and third party complaints) will be managed through the IMS and reported to the appropriate authority as required. Reporting will occur on an incident, weekly and monthly basis to the appropriate Environmental Manager. Landholder complaints will be recorded in a complaints register (that forms part of the EHSMS) and appropriate corrective actions will be implemented and closed out by the appropriate Environmental Manager Pipe Laying and Backfilling or Management Performance Criteria Pipe Laying and Backfilling To manage the impacts of pipe laying and backfilling such that: Disturbance to landholders and third parties is minimised. The likelihood of erosion or subsidence is minimised. Topsoil is preserved for rehabilitation. There are no significant barriers to the re-establishment of overland flow of water. No warranted complaints from landholders, and warranted complained responded to within 2 working days. No inversion of subsoil and topsoil. Well compacted trench line with appropriately installed trench breakers and contour banks