Environment Effects Statement ATTACHMENT II • Environment risk report II Table of Contents
Table of Contents
1 Introduction II-1 1.1 Overview II-1 1.2 Risk assessment objectives II-2 2 Method II-3 2.1 Overview of risk assessment approach II-3 2.2 Context II-5 2.2.1 Project development II-5 2.2.2 Project design II-6 2.2.3 Project setting II-9 2.2.4 Approvals context II-14 2.3 Risk assessment II-15 2.3.1 Identifying risk II-16 2.3.2 Analysing risk II-16 2.3.3 Evaluating risk II-18 2.4 Treating risk II-18 2.5 Communication and consultation II-19 2.6 Monitoring and review II-20 3 Conclusion II-21 References II-22 Appendix A Consequence guide II-23 Appendix B Risk register II-31
Table of Tables
Table II–1 West Gate Tunnel Project key design aspects II-8 Table II–2 West Gate Tunnel Project EES specialist investigations II-12 Table II–3 EES evaluation objectives II-14 Table II–4 Likelihood guide II-17 Table II–5 Example consequence guide II-17 Table II–6 Risk matrix II-18
Table of Figures
Figure II–1 Overview of risk assessment, impact assessment and project design process II-2 Figure II–2 Overview of risk and impact assessment process II-4 Figure II–3 The West Gate Tunnel Project development process II-5 Figure II–4 Overview of West Gate Tunnel Project design II-7
West Gate Tunnel Project | Environment Effects Statement Attachment II-i
Attachment II Environment risk report
1 Introduction
In December 2015, the Victorian Government announced its intention to partner with Transurban to build the West Gate Tunnel Project. The key components of the West Gate Tunnel Project include the widening of the West Gate Freeway, tunnels under Yarraville and an elevated motorway that connects the West Gate Freeway with the Port of Melbourne, CityLink and the Melbourne central city. The project provides an alternative river crossing to the West Gate Bridge. The Western Distributor Authority is the project proponent.
The Minister for Planning designated the West Gate Tunnel Project as a “public works” under Section 3 of the Environment Effects Act 1978 (EE Act). This requires the proponent to prepare an Environment Effects Statement (EES). The EES allows stakeholders to understand the likely environmental impacts of the West Gate Tunnel and how they are proposed to be managed.
Subsequently, in April 2016 the Scoping Requirements were published to set out matters to be investigated and documented in the EES. The Scoping Requirements state the EES should be consistent with the principles of a systems and risk-based approach.
The environmental risk assessment process adopted to support the EES is consistent with the International Standard ISO 31000:2009, Risk management - Principles and guidelines. The standard sets out principles, a framework and a process for managing risk and provides a means for organisations to identify opportunities and threats and effectively allocate and use resources for risk treatment.
This report describes the risk assessment process that was undertaken for the West Gate Tunnel EES and includes a register of the identified environmental risks and their associated assessment.
1.1 Overview
Risk assessment was undertaken iteratively throughout the Western Gate Tunnel Project development, informing the project design and the specialist investigations. This process has enabled many of the identified risks to be addressed through project design and construction method choices with residual risks being managed through the implementation of an effective environmental management framework.
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Figure II–1 Overview of risk assessment, impact assessment and project design process
1.2 Risk assessment objectives
The objective of the West Gate Tunnel Project risk assessment was to identify environmental risks associated with the construction and operation of the West Gate Tunnel Project and to develop control and mitigation measures where possible to minimise these risks. More specifically the risk assessment: x Facilitates a consistent approach to assessing risk across the specialist investigations x Identifies environmental risks from the project and their associated impact pathways x Focuses the specialist investigations to address key risks x Provides guidance for the development of risk treatment.
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2 Method
2.1 Overview of risk assessment approach
The International Standard ISO 31000:2009, Risk management - Principles and guidelines sets out a systematic approach to risk assessment. The process starts with establishing the risk context, followed by identifying, analysing and evaluating risk before developing risk treatments. Stakeholder communication and consultation together with monitoring and review are integral to each stage of the process.
ISO 31000:2009 requires the risk assessment approach to include the following seven main stages: x Establishing the context is determining the setting in which the project is taking place, establishing evaluation criteria and defining the structure of the risk analysis x Identifying risk is establishing what, where, when, why and how risk could arise x Analysing risk is establishing if existing controls are present and determining the level of risk through evaluating likelihood and consequence x Evaluating risk compares the estimated levels of risk with evaluation criteria x Treatment of risk is identifying residual risk and to develop mitigation and management measures x Stakeholder communication and consultation occurs throughout the process allowing stakeholders to understand and contribute to the basis on which decisions are made x Monitoring and review allows for new risks to be identified, variation in changing context and the effectiveness of controls and treatments to be determined.
The approach to these seven stages is described within this report.
The risk assessment carried out for West Gate Tunnel Project was integral to the development of the EES, as required by the Scoping Requirements. Risk assessment and identification of key risks was ongoing as the design of the project progressed. This included reassessing risk pathways identified as relevant to the Reference Design and identifying any new or modified risk pathways for the design prepared by Project Co.
The iterative risk and impact assessment process also included the reassessment of risks once the Environmental Performance Requirements (EPRs) were refined as part of the impact assessment. The link between the risk and impact assessments is illustrated in Figure II–2.
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Figure II–2 Overview of risk and impact assessment process
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2.2 Context
Establishing the context defines the scope for the risk assessment process and sets the criteria against which the risks will be assessed. For the West Gate Tunnel Project this includes understanding the project development process, the project design being assessed in the EES, the project setting and the approvals process being followed. The sections below describe these elements.
2.2.1 Project development
The project development undertaken for the West Gate Tunnel Project involved an integrated design, approval and procurement process as shown in Figure II–3. Community consultation and specialist assessments were included at each stage of the development. The initial phase involved the consideration of Strategic Options, with more detailed analysis undertaken to develop the project, and then refine this to form the Concept Design, Reference Design and ultimately the design.
Figure II–3 The West Gate Tunnel Project development process
Whilst the EES is primarily concerned with the assessment of the potential environmental risks and impacts that may arise from the design and its associated construction and operation activities, the earlier project development phases involved activities that have contributed to the management of environmental risks. This included an initial risk screening exercise as part of development of the Concept Design to identify and evaluate risks at a strategic level.
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This initial risk screening evaluated impact pathways through qualitative analysis. The risks considered were those that could occur as a result of construction and operation of a major transport infrastructure project in Melbourne’s inner west. The screening allowed opportunities to avoid and mitigate risks through design to be further explored and was used to prioritise effort for the EES risk and impact assessment process.
2.2.2 Project design
An overview of the West Gate Tunnel Project design is presented in Figure II-4. The project has three components being the West Gate Freeway, Tunnels and the Port, CityLink and city connections. Further information on the key design aspects relevant to the identification of project risks is summarised in Table II-1.
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Figure II–4 Overview of West Gate Tunnel Project design
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Table II–1 West Gate Tunnel Project key design aspects
Component Key design aspects West Gate Widening the existing freeway from four lanes to six lanes in each direction (an additional Freeway two lanes in each direction) and auxiliary lanes as required between Williamstown Road and M80 interchange Widening of Princes Freeway between M80 interchange and Kororoit Creek Road. This would include provision of an additional westbound lane on the Princes Freeway (from four lanes to five) to tie-in to the widened West Gate Freeway Reconfiguring lanes and providing lane channelisation to allow for the express movement of traffic between the city and Princes Freeway/ M80 Ring Road Maintaining connectivity to all routes currently connected to the West Gate Freeway, allowing access to and exit from the freeway via: x M80 Ring Road x Princes Freeway x Grieve Parade x Millers Road x Williamstown Road Constructing new ramps to connect the West Gate Freeway to Hyde Street. These ramps would be used to divert placarded loads from the project tunnels and local roads and would provide direct access to the industrial sites on Hyde Street adjacent to the Maribyrnong River Extending and improving shared pedestrian and cyclist paths along the West Gate Freeway to Hyde Street. This would improve connectivity between Millers Road and the existing path at Fogarty Avenue, and would allow pedestrians and cyclists to connect to other existing paths along the Maribyrnong and into the central city Upgrading pedestrian and cycling overpasses between Rosala Avenue and Richards Crescent, and between Muir Street and Fogarty Avenue, to meet the access requirements of the Disability Discrimination Act 1992. These upgrades would improve accessibility and connectivity for all users between Brooklyn and Altona North, and between Yarraville and South Kingsville. Tunnels Connecting the West Gate Freeway to the port precinct and the western periphery of the central city via twin tunnels under Yarraville of around 2.8 kilometres (eastbound) and four kilometres (westbound) in length. Southern tunnel portals located within the alignment of the West Gate Freeway with the eastbound portal located 300 metres west of Williamstown Road and the westbound portal located west of the Newport Freight Railway Line. Northern tunnel portals located to the east of the intersection of Whitehall Street and Harris Street, to the north of Somerville Road. Capacity for each tunnel to accommodate three lanes of traffic. Cross passages between the tunnels around every 120 metres to meet safety and operational requirements. Ventilation systems for each tunnel including a series of jet fans for in-tunnel air quality management, and a ventilation facility located near the exit of each tunnel for controlled release and effective dispersion of tunnel air. The southern ventilation outlet would be located 150 metres west of the Newport Freight Railway Line, over the tunnel alignment. The northern ventilation outlet would be located 60 metres east of Whitehall Street, 250 metres north of Somerville Road. The ventilation structures would be an average of approximately 45 metres high, enclosed with an architecturally clad exterior that varies from approximately 40 metres to 55 metres high. Tunnel management systems to allow speed limits to be varied, as well as variable message signs to alert users of incidents to prevent traffic disruption as well as for effective response to incidents.
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Component Key design aspects Exclusion of over-dimensional vehicles and placarded loads, including signage and alarm systems. Over-dimensional and placarded loads would gain access to the port via the new Hyde Street ramps. Port, CityLink Nnew bridge structures over the Maribyrnong River connecting the West Gate Tunnel and City Project tunnels to the Port of Melbourne, CityLink and north and west of Melbourne’s Connections central city Twin viaducts above Footscray Road between the Maribyrnong River and the existing intersection of Footscray Road and Appleton Dock Road Direct access from the West Gate Tunnel Project to the Port of Melbourne via MacKenzie Road (for West Swanson Dock) and Appleton Dock Road (for East Swanson Dock, Victoria Dock and Appleton Dock) New connections between the West Gate Tunnel Project twin viaducts and CityLink, Dynon Road and the existing Footscray Road Extension of Wurundjeri Way from Dudley Street to Dynon Road and upgrade to existing Wurundjeri Way from Dudley Street to Flinders Street Extension of, and improvements to, the existing pedestrian and cyclist shared use path along Footscray Road. This would include the grade separation of the Footscray Road share use path, suspended between the two elevated structures along the centre of the road as a ‘veloway’. The existing path south of Footscray Road would remain in place as an alternative/ additional route.
2.2.3 Project setting
The West Gate Tunnel Project passes through highly urbanised areas of Melbourne’s west including the suburbs of Laverton North, Altona North and Brooklyn and then through South Kingsville, Spotswood, Yarraville and Footscray, before crossing the Maribyrnong River to the Port of Melbourne, Docklands and West Melbourne.
The area includes long-established residential areas, shopping and commercial centres, industrial areas, parks and reserves and community and recreational facilities. The development of the region has been historically influenced by industries along the Yarra River and the Maribyrnong River, the operation of the Port of Melbourne and associated freight infrastructure and the construction of the West Gate Freeway around 50 years ago. Recently, the area has experienced significant urban renewal with some former industrial precincts being redeveloped for residential and mixed use.
Physical environment
While there are some ecological values in the vicinity of the project, including remnant vegetation, scattered indigenous trees and isolated observations of rare or threatened species, overall the area is considered highly modified and limited in its ecological value. Generally, ecological values and habitat occur in areas associated with the waterways of Kororoit Creek, Stony Creek, the Maribyrnong River and Moonee Ponds Creek.
There is a documented history of land contamination within the area between Williamstown Road and the Maribyrnong River that has resulted from historic land uses. Potential contamination sources along the alignment include known quarry sites which are likely to have been filled with a range of project wastes including domestic and industrial waste, former industrial activities (particularly at sites along Whitehall Street) including former and current EPA priority sites, historic filling and the potential for acid sulphate soils associated with the natural geology of the area.
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Groundwater beneath the area of the West Gate Tunnel Project has the potential to be contaminated by substances or waste resulting from historic industrial operations. Contamination of groundwater occurs through historic activities associated with inadequate practices of handling, storing and disposing of hazardous waste and chemicals which often reflect the inadequacy of environmental regulations in the late 1800s and early part of the nineteenth century to control these practices. Contamination may also occur through the importation of contaminated fill or the migration, dispersion or leaching of contamination through soil or groundwater and subsequent discharge to waterways through surface water runoff. Naturally occurring geological conditions may also present potential impacts to the project, such as acid sulphate soils. Seepage of groundwater into old sewer assets has also affected the local groundwater levels and flow direction.
The regional waterways are relatively degraded with a number of the objectives of the State Environment Protection Policy (Waters of Victoria) not being met.
Heritage
There is generally low potential for Aboriginal archaeological sites and sub-surface deposits in the vicinity of the project due to historical disturbance of the land through urbanisation and development. Nevertheless some areas of Aboriginal cultural sensitivity exist, particularly along Kororoit Creek.
Some listed historical heritage sites exist in the vicinity of the project, predominantly associated with the industrial and maritime heritage of the region. Of particular importance are the Western Outfall Sewer immediately to the west of the project and the Footscray Wharves Precinct to the north of the project. In the vicinity of the Maribyrnong River and Stony Creek Backwash, there are a variety of industrial and maritime heritage sites including a number of shipwrecks.
Health and amenity
Land use in the area includes long-established and diverse neighbourhoods and communities, shopping and commercial centres, industrial areas, parks and reserves, and community and recreational facilities. The development of the area has been heavily influenced by industries along the Yarra and Maribyrnong rivers, the development of railway lines to the west of Melbourne and post-war residential subdivisions and large-scale industrial development. The project would pass through a corridor of suburbs extending from Laverton North, Altona North and Brooklyn in the west through South Kingsville, Spotswood, Yarraville and Footscray, and then across the Maribyrnong River to the Port of Melbourne, Docklands and West Melbourne in the east.
Existing air quality in the vicinity of the proposed West Gate Tunnel Project is typical for an urbanised area and is consistent with air quality in wider metropolitan Melbourne. Key emissions sources in the region include those from traffic using the road network, railway operations, manufacturing industries, and power generation. The climatic conditions such as bushfires and dust storms can impact on air quality.
The population within the areas surrounding project comprise residents and workers as well as those attending schools, day-care and recreational areas. The suburbs relevant to the project generally have a higher proportion of working aged people (20–64 years) when compared with the Greater Melbourne area and Victoria. The exception to this is Altona North where there is a higher percentage of older people (aged 65 years and older) and lower percentage of working aged people. Excluding Altona North, the population in the project area is consistent with that in the larger local government areas of Maribyrnong and Melbourne City. The population in the local government area of Hobsons Bay is more consistent with that in Greater Melbourne and Victoria.
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Community
The project is located primarily within the municipalities of Melbourne, Maribrynong and Hobsons Bay. These municipalities form the hub of the inner west area of metropolitan Melbourne. Social and cultural values are not only associated with public or community facilities and events, but also with places that people connect to in an area. The social infrastructure comprises a mix of public open space, recreational facilities, child care and health care facilities, commercial hotels and small shopping precincts. The infrastructure identified is of importance at either a local scale for residents and regular visitors to the area, or at a regional scale for the metropolitan Melbourne population and wider community, including interstate and international visitors.
The road network in the west of Melbourne relies heavily on a limited number of key routes such as the West Gate Freeway and Geelong Road (Princes Highway). The West Gate Freeway is the key east-west route, providing a direct connection from the city and eastern/south-eastern suburbs to western suburbs such as Altona, Laverton, Point Cook, Hoppers Crossing, Werribee and the city of Geelong via the Princes Freeway. The West Gate Freeway also serves the industrial precincts in the west and provides a connection to the M80 Ring Road, Deer Park Bypass and Western Freeway further west. Geelong Road provides an alternative to the West Gate Freeway, however limited freight connectivity at its northern end to and from the Port results in the road being under-utilised as a strategic freight route.
There are a number of industrial and commercial precincts within the West Gate Tunnel Project area, the most significant of which is the port precinct – the area occupied by the Port of Melbourne along Footscray Road, the Maribrynong River and the Yarra River to the south. The Port of Melbourne is Australia’s busiest container and general cargo port and handles over $75 billion of trade annually. Surrounding land to the port precinct is largely used by business supporting the port including container yards, storage and transport companies. This includes the Yarraville port industrial precinct adjacent to the Maribyrnong River, south of Footscray Road to the West Gate Freeway. This industrial precinct includes Mobil, Orica, CRS Limited and Sugar Australia. Major freight and logistics companies including Toll, Linfox, L Arthur Transport and Pacific National also exist on the northern side of Footscray Road. A key commercial area to the east of the project area is the Docklands, which is home to Harbour Town Shopping Centre, major retailer Costco, Medibank Icehouse and Melbourne Star, the latter of which is a tourist attraction for Melbourne.
There are a number of areas identified for redevelopment, urban renewal or potential future development in proximity to the project including the former Bradmill site (between Francis Street and the Newport Freight Railway Line, Yarraville), Precinct 15 (the Altona North Comprehensive Development Zone area, between Kyle Street and New Street), Arden- Macaulay, E-Gate, West Melbourne and Docklands areas to the west of the central city. Other potential urban renewal areas are identified in the City of Melbourne Planning Scheme adjacent to Dynon Road. Their long term development is dependent on the future configuration of the port freight terminal south of Dynon Road.
Specialist investigations
Based on the project setting and the associated sensitivities, and in response to the Scoping Requirements of the West Gate Tunnel Project, a range of specialist investigations have been undertaken for the EES with a focus on the key risks. An overview of these investigations and context is provided in Table II–2.
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Table II–2 West Gate Tunnel Project EES specialist investigations
Aspect Context Aboriginal Although the project area has undergone widespread ground disturbance, a number of cultural heritage registered Aboriginal cultural heritage places have been identified in the project alignment, which have the potential to be impacted by construction of the West Gate Tunnel Project. Air quality The West Gate Tunnel Project has the potential to impact air quality due to construction activities, and, following project completion, emissions from vehicles using new or expanded surface roads and emissions to air from road tunnel ventilation systems. Sensitive receptors include residential areas, together with schools, hospitals, aged care facilities, kindergartens, child care centres and recreational areas. Business The West Gate Tunnel Project has the potential to impact businesses through changes to access from diminished transport or reduced parking availability due to site clearance and construction activities, resulting in disruption to businesses. Amenity impacts such as noise, visual, vibration and dust may affect business functionality. Business viability may be affected by partial acquisition and loss of functionality, loss of passing trade or displacement and loss of continuity. Contamination Construction of the West Gate Tunnel Project will generate spoil that has the potential and spoil to impact the public health, construction worker health and the environment if management characterisation of potentially contaminated areas are not adequately understood. Significant volumes of spoil will be generated from construction of the portals and tunnels. Some of this spoil will be contaminated and some will also have the potential to result in acidic surface water runoff. This spoil will require appropriate characterisation and identification of suitable reuse options, where available, otherwise disposal to an EPA approved facility. Ecology Though the extent and quality of the ecological values within the project alignment are limited, and under disturbance pressure from surrounding industrial and residential land use, there are a number of values within the project alignment that are considered to be of local importance at least. The remnant vegetation lining the lowest reaches of Stony Creek and Stony Creek Backwash, as well as the wetland vegetation lining Moonee Ponds Creek are considered to provide habitat for migratory wading birds and waterfowl. The mature canopy trees planted throughout the project alignment provide a feeding resource for common native fauna, and are recognised for their contribution to maintaining healthy urban ecosystems in the City of Melbourne Draft Urban Ecology and Biodiversity Strategy. Greenhouse gas The majority of potential greenhouse gas emissions associated with the project are likely to result from the construction phase, related to the manufacture of the construction materials as well as the electricity and fuel for the operation of plant and equipment. The emissions related to the operations phase include maintenance activities and electricity consumption for lighting and ventilation of the tunnel. Ground Construction of the West Gate Tunnel Project may cause ground movement from a movement number of sources. Tunnelling is a key potential impact, which may cause distortion and has the potential to cause damage to surface infrastructure and utilities. Other potential impacts due to construction include slope instability, primary consolidation settlement and ground movement around open cut portal works.
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Aspect Context Groundwater The inner west of Melbourne has a history of former and current industrial activities and the landscape has also undergone anthropogenic changes, in particular around the alignment of the Yarra River, Maribyrnong River, the former West Melbourne Swamp and Stony Creek waterways. These activities may have caused contamination of the groundwater and have altered the physical and ecological environment surrounding waterways. Some of these features are either along the alignment of the design or in close proximity of the West Gate Tunnel Project. Earthworks involving surface works, piling and tunnelling may influence the level and/or quality of groundwater that will be required to be managed as part of the design, construction and operation and maintenance of the new West Gate Tunnel Project. Construction of the West Gate Tunnel Project will generate groundwater from inflows to the excavations for the portals and driven tunnels. This inflow of groundwater has the potential to impact the public health, construction worker health and the environment if it is contaminated and disposal or reuse is not appropriately managed. Excessive inflows into the tunnel during construction or operation may reduce the amount of groundwater that is available as a resource for use by the public or groundwater dependent ecosystems. Historical Large scale infrastructure works such as the West Gate Tunnel Project have the heritage potential to affect the heritage values of places through physical impacts and consequent loss of significant fabric, and also through visual impacts of new infrastructure of contrasting form and scale in proximity. The range of heritage places is consistent with this variety of land uses and the patterns of their development. The study area includes modestly-scaled houses, commercial and civic buildings, many in heritage precincts, large elements of infrastructure such as the historic Western Outfall Sewer and a variety of industrial heritage sites, along with shipwrecks and other archaeological sites along and within the Maribyrnong River and Stony Creek. The majority of heritage places referenced in the study are recognised and afforded protection through statutory heritage controls under Australian and Victorian legislation. Human health The health of communities in proximity to the project area could be impacted during construction of the West Gate Tunnel Project due to increased noise and vibration as well as changes in air quality as a result of construction and operation. Land use The project area passes through highly urbanised areas of Melbourne’s west, which planning includes a diverse range of land uses such as retail, office, industrial, commercial, residential, educational and civic. The project has the potential to impact land use planning and strategic policy such as urban renewal precincts and local planning schemes. Landscape and The West Gate Tunnel Project has the potential to impact the landscape and visual visual elements through vegetation removal, establishment of construction compounds within open space areas, and vertical structures such as ventilation systems and bridges at the project operational phase. Sensitive receptors with respect to landscape and visual include residential areas, together with recreational and open spaces, hospitals, educational institutes and community facilities. Noise and The West Gate Tunnel Project has the potential to increase noise and vibration impacts vibration due to construction activities, fixed facilities required for operation such as the exhaust (surface) and tunnel ventilation systems and operational road traffic noise. Sensitive receptors with respect to noise and surface vibration include residential areas, together with schools, hospitals, age care facilities, kindergartens, child care centres and recreational areas. Social The West Gate Tunnel Project has the potential to impact social conditions by disrupting operation and access to community and recreation facilities, reducing access to, or creating permanent loss of open space, disrupting resident movement pattern or temporarily displacing residents. Disruption can be caused by changes in air quality, visual and landscape, traffic, noise and vibration.
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Aspect Context Surface water, Waterways within the project site traverse commercial, residential and industrial land drainage and uses and contribute to the high loads of nutrients and metals identified in background wastewater concentrations of in-stream water samples. The West Gate Tunnel Project has the disposal potential to impact water quality and hydrology through site clearance, construction site establishment, earthworks, service relocation, dive structure / portal construction, tunnelling activities, precast plant construction, manufacturing of precast units, bridge construction and the construction of surface roads and other civil infrastructure works, including twin viaducts and shared-use paths. This has the potential to affect people and property within floodplains and ecosystems sensitive to water quality in receiving waters. Transport During the construction and operation of the project there is potential for adverse impacts on motor vehicle traffic, public transport, cark parking, bicycle connectivity and pedestrian movements, as well as increased risks to road safety. Vibration and Tunnelling will be undertaken during the construction phase of the project for the regenerated southern portals west of the Williamstown Road interchange where it connects with the noise West Gate Freeway through to the northern portal west of the Maribyrnong River. Vibration and regenerated noise associated with tunnelling has the potential to impact personal amenity, integrity of infrastructure and continued operation of commercial entities.
2.2.4 Approvals context
In December 2015 the Victorian Minister for Planning decided that an EES would be prepared for the project. The primary approvals informed by the EES process are Planning Scheme Amendments under the Planning and Environment Act 1987 and a Works Approval under the Environment Protection Act 1970. An approved Cultural Heritage Management Plan is also required under the Aboriginal Heritage Act 2006.
In April 2016 the Scoping Requirements were published setting out matters to be investigated and documented in the EES. The Scoping Requirements set out evaluation objectives which identify desired outcomes in the context of potentially significant issues or risks of the project. These evaluation objectives, listed in Table II–3, provide a framework to guide an integrated assessment of the environmental effects of the project.
Table II–3 EES evaluation objectives
Evaluation objective Transport capacity, connectivity and traffic management – To increase transport capacity and improve connectivity to and from the west of Melbourne and, in particular, to increase freight movement via the freeway network instead of local and arterial roads, while adequately managing effects of the works on the existing broader and local transport networks, including road, public transport, cycling and pedestrian transport networks. Built environment – To protect and enhance the function and character of the evolving urban environment including built form and public realm within the immediate and broader context of the project works. Health, amenity and environmental quality – To minimise adverse air quality, noise and vibration effects on the health and amenity of nearby residents, local communities and road users during both construction and operation of the project. Social, business, land use, public safety and infrastructure – To minimise adverse effects on the social fabric of the community, including with regard to community cohesion, access to community services and facilities, business functionality, changes to land use, public safety and access to infrastructure. Landscape, visual and recreational values – To minimise adverse effects on landscape, visual amenity and recreational and open space values and to maximise the enhancement of these values where opportunities exist.
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Evaluation objective Land stability – To avoid or minimise adverse effects on land and river bed or bank geomorphic stability from project activities, including tunnel construction and crossings of the Maribyrnong River, Kororoit Creek, Stony Creek and Moonee Ponds Creek. Hydrology and water quality – To avoid or minimise adverse effects on surface water and groundwater quality and hydrology in particular resulting from the disturbance of contaminated or acid-forming materials, and to maintain functions and values of floodplain environments. Biodiversity – To avoid or minimise adverse effects on native terrestrial, aquatic and inter-tidal flora and fauna, and address opportunities for offsetting potential losses consistent with the relevant policy. Cultural heritage – To avoid or minimise adverse effects on Aboriginal and historical cultural heritage values. Waste management – To manage excavated spoil and other waste streams generated by the project in accordance with the waste hierarchy and relevant best practice principles. Environmental management framework – To provide a transparent framework with clear accountabilities for managing environmental effects and hazards associated with construction and operation phases of the project, in order to achieve acceptable environmental outcomes.
2.3 Risk assessment
The risk assessment process followed the International Standard (ISO 31000:2009) approach. It involved identifying and evaluating potential interactions between the project components and activities and sensitive assets, values and uses (known as risk pathways).
The following tasks were undertaken to identify, analyse and evaluate the initial risks: x Set the context for the environmental risk assessment x Develop likelihood and consequence guides and a risk assessment matrix x Review project components and activities described in the project description, alongside a review of existing assets values and uses, to identify risk pathways for the construction and operation phases of the project x Categorise risks into planned events and risk events x Identify standard controls and requirements typically applied in projects of this nature that would be implemented to mitigate individual risks x Assign likelihood and consequence levels to determine an initial risk rating.
A workshop involving key specialists and the Technical Reference Group (TRG) was held to test the preliminary risk information. The information was reviewed for completeness and the likelihood and consequence of a planned event or risk event and its initial risk rating were identified.
The initial risk ratings were used to identify the key risks for greatest attention in the subsequent impact assessment as key impacts. Where stakeholders identified key issues of particular concern or importance, these were also carried forward for more detailed impact assessment. As part of the impact assessment process, where additional or revised EPRs were identified, the risk assessment was revised to determine the residual risk of the planned event or risk event, taking into account the final EPRs (incorporating initial and/or revised EPRs). This residual risk rating reflects the likelihood and consequence of the risk following the implementation of the final EPRs.
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The sub-sections below further describe the processes undertaken in identifying, analysing and evaluating the risks associated with the West Gate Tunnel Project. The risk assessment results are presented in the Risk Register provided in Appendix B.
2.3.1 Identifying risk
Risk pathways are the potential interactions between receptors and causes or sources of risk.
Potential receptors were identified from the existing conditions assessments undertaken by each of the specialists. These assessments identified environmental assets, values or uses that are protected by legislation and policy, are important to the local community (or wider geographic area) or are likely to be susceptible to impacts as a result of the project.
Potential causes or sources of risk were identified by considering the broad types of impacts that may occur as a result of the construction and operation of a major transport project. This included the type of construction, proposed infrastructure and operations, and also the location of the project.
The risk pathways developed during the initial risk assessment were reviewed and refined by the project team and specialists, in consultation with the TRG, as part of the detailed risk assessment. This included development of a more comprehensive set of risk pathways based on a more complete description of the project and enhanced descriptions of risks in terms of location, spatial extent, duration and severity. Risks were categorised in terms of their association with the construction and operations phases of the project.
For the detailed risk assessment potential risk pathways were also segregated between planned events and risk events. These terms are defined as follows: x Planned event – impacts on a particular asset/value/use of the environment that are known and that are necessary to facilitate the construction of the project. These events have a likelihood of greater than 50% and were conservatively assumed as occurring as the result of implementing the project. x Risk event – potential for further impacts to a particular asset/value/use of the environment that are not necessarily known and that may occur during the construction and operation of the project, but are not certain or quantified at this stage.
Each specialist study independently addressed planned events and risk events.
2.3.2 Analysing risk
As stated in ISO 31000:2009, risk is a combination of the likelihood of an event occurring and the potential consequences of the event. Risk analysis therefore involved consideration of the causes and sources of risk, the potential consequences, and the potential likelihood.
The risk assessment involved analysis of the identified risk pathways by assessing the likelihood and potential consequence of each of the risk pathways identified. A risk matrix was used to assign a risk rating for each risk pathway. The results of this assessment are documented in the risk register in Appendix B.
Likelihood and consequence criteria were developed by specialists for each specialist aspect and are presented in Table II–4 and Appendix A, respectively. An example consequence guide is provided in Table II–5. The criteria were developed with consideration to applicable legislation and policy and the evaluation objectives specified in the Scoping Requirements and were refined in consultation with the TRG.
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In particular, effort was made to calibrate the criteria across the range of specialist aspects. Whilst difficult to compare the level of consequences across aspects, the process enabled the scale and magnitude of effects at each consequence to be generally aligned.
The assignment of an initial level of likelihood and consequence for each of the risk pathways took into account the initial EPRs. These include standard construction practices and management measures that are typical of a project of this scale and type, as well as those mitigation and management measures included as part of the project design that would be in place to control the identified risks.
The likelihood of the potential impact occurring takes into account the probability of the maximum credible consequence as described in the consequence guide. The descriptors in the consequence guide were used as a guide, with specialists also using their professional judgment and experience to assign the appropriate consequence levels.
In cases where information was incomplete or there are degrees of uncertainty, a conservative assessment was made on the basis of the maximum credible consequence. Following the assignment of likelihood and consequence levels, and taking the initial EPRs in to consideration, an initial risk rating was determined using the matrix provided in Table II–6. This matrix was taken from the risk management guidelines prepared by the Victorian State Government (DTF, 2013). Application of this risk matrix is considered to result in relatively conservative risk ratings. For example a pathway determined as almost certain but having an insignificant consequence receives a medium risk rating based on the matrix.
Table II–4 Likelihood guide
Descriptor Explanation Almost Certain The event is expected to occur in most circumstances Likely The event will probably occur in most circumstances Possible The event could occur Unlikely The event could occur but not expected Rare The event may occur only in exceptional circumstances
Table II–5 Example consequence guide
Aspect Insignificant Minor Moderate Major Severe Ground Ground Superficial Some damage Extensive Complete loss movement movement damage to to buildings or damage to of buildings or beyond buildings or infrastructure buildings or infrastructure background infrastructure assets resulting infrastructure asset function levels causes assets that does in some minor assets resulting as a result of no measurable not impact on or temporary in partial loss of complete damage to serviceability of loss of asset asset function. destruction and/ buildings or asset and is function which Can be repaired or large scale infrastructure easily repaired. can be readily with effort but damage assets. repaired. may require requiring some extensive major replacement. engineering works for rectification or reconstruction
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Table II–6 Risk matrix
Consequence level Likelihood Insignificant Minor Moderate Major Severe Almost Certain Medium Medium High Extreme Extreme Likely Low Medium High High Extreme Possible Low Medium Medium High High Unlikely Low Low Medium Medium Medium Rare Low Low Low Low Medium
2.3.3 Evaluating risk
The results of the initial risk assessment were used to further develop the project design and to identify aspects for particular attention in the EES investigations.
Based on the risk rating that was determined for each of the risk pathways, risks were evaluated to identify key risks requiring further investigation. Key risks were identified as those risk pathways with the potential to lead to significant impacts and were carried forward for more detailed impact assessment. These risks were defined as risks rated as ‘medium’ or above.
Where stakeholders identified key issues of particular concern or importance, these were also carried forward for more detailed impact assessment, even if their risk rating was low.
Other risks that were assessed as low and were not key concerns of stakeholders and the community, were not subject to further analysis.
2.4 Treating risk
One of the key outcomes of the EES process is to recommend a set of EPRs for delivery of the project. The risk assessment process has directly informed development of the EPRs as described below.
Initial EPRs were prepared to inform the risk assessment, the development and refinement of the design and the design and construction procurement process. This performance-based approach defines the legislative requirements, standards, limits and processes that the project must meet, while still providing flexibility to accommodate minor modifications during the detailed design process – provided the outcomes specified in the EPRs are achieved. These initial EPRs were based on standard requirements and measures that are typically incorporated into construction contracts for road and tunnel projects of a similar scale and nature to the West Gate Tunnel Project.
The risk assessment and impact assessment processes conducted for the proposed project design provided a mechanism to refine or expand the initial EPRs. In some instances, additional or revised EPRs were required to reduce risks and impacts on identified sensitive assets, values and uses.
In developing the EPRs, the following hierarchy of control was used to identify potential mitigation and management measures: x Avoidance through design refinements x Minimisation through timing of the activities
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x Mitigation or management through physical/engineering controls x Mitigation or management through operational controls x Induction, training and awareness x Monitoring and measurement x Adaptive management and contingency protocols.
While the final EPRs are performance based outcomes, in some cases more specific requirements are able to be included to reflect the stage of the design development. In other cases, more flexibility is required in how the outcome will be achieved as the detailed design process continues. This flexibility will incorporate the principle to minimise or reduce impacts to the extent practicable, noting that detailed design will test the feasibility of minimisation possible.
The full set of EPRs (EES Chapter 8 Environmental Management Framework) has been developed as a complete set. EPRs for individual specialist topics do not operate in isolation. In assessing impacts and residual risk, the impact assessment studies have cross referenced to EPRs from other technical areas as relevant. This means that some specialist areas have no separate EPRS, for example the EES Technical Report J Human health references EPRs from related topics including air quality and noise and vibration.
The EPRs for the project would be included in the Environmental Management System and incorporated into contracts for the construction and operation of the West Gate Tunnel Project (refer to EES Chapter 8 Environmental Management Framework).
2.5 Communication and consultation
Consultation was undertaken during each stage of design development of the project and the preparation of the EES. This consultation has provided information to establish the context for the risk management process, and inform identification, assessment and treatment of risk.
Community consultation provided an understanding of the key interests, concerns and preferred outcomes of local residents, businesses and other interested parties and ensured that these were considered in the design and assessment process. Consultation included the formation of a Community Liaison Group, a diverse and engaged focus group that provided the project team with ongoing feedback from the community during the development of the project design.
Ongoing engagement with Councils and relevant government agencies has enabled the key issues and policy priorities of State and local government to be considered when preparing the EES. The Technical Reference Group (TRG) provided advice to the project team on key issues and concerns from their respective interest areas. Chapter 7 Communications and engagement provides further information about the TRG.
The approach taken to community and stakeholder consultation is outlined in the EES Communications and Engagement Strategy, discussed in the EES Chapter 7 Communications and engagement. This chapter also describes where consultation feedback has informed the project design development and the EES. Further information is provided in the EES Attachment III Stakeholder and community engagement report.
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2.6 Monitoring and review
An iterative approach to project development and risk assessment has been taken. This has allowed identified risks to be progressively assessed by specialists and addressed through project design and construction method choices and the Environmental Performance Requirements.
Risks have been reviewed at key project development stages including: x Initial risk assessment following completion of existing conditions assessments x Detailed risk assessment in parallel with the specialist risk and impact assessments x Review and refinement of the detailed risk assessment for the tender design prior to completion of the EES process.
This has enabled emerging risks to be identified and risk treatments (Environmental Performance Requirements) refined as specialist studies progress and new information becomes available.
The Environmental Performance Requirements will be implemented, and performance against these monitored and reviewed, through the proposed governance arrangements outlined in Chapter 8 Environmental Management Framework of the EES.
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3 Conclusion
The detailed risk assessment results contained in this report reflect the assessments presented in the EES Technical Reports. Appendix B contains the risk register for the project.
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References
Department of Treasury and Finance (2013). Investment Lifecycle and High Value/ High Risk Guidance, Supplementary Guidance: Project Risk Management. Victorian Government.
International Organisation for Standardisation (ISO) (2009). 31000: 2009 Risk management - Principles and guidelines.
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Appendix A Consequence guide
Aspect Insignificant Minor Moderate Major Severe Aboriginal cultural No impact on cultural Destruction of a place (or Destruction of a common Destruction of rare Destruction of place(s) heritage heritage places or values places) and associated occurrence place(s)and/or occurrence place(s) and/or and/or associated cultural cultural values in a associated cultural values. associated cultural values. values with exceptional deteriorated condition with x A place with a limited x A place with a large value. a high degree of range of cultural number and diverse x A place identified by disturbance evident and materials and a place range of cultural Aboriginal Victoria some cultural materials in a fair to good materials and/or cultural values remaining condition with some x A place with stratified identified by Traditional degree of disturbance deposits and/or Owners of exceptional evident. surface spatial value that the patterning that reflects destruction would be the way in which catastrophic cultural materials were x A burial. deposited Air quality No measurable impact on Measurable impact on air Measurable (localised) Measurable (widespread) Measurable (widespread) air quality. quality not causing impacts on air quality short-term impacts on air long-term impacts on air exceedance of applicable causing marginal quality causing significant quality causing significant air quality standards [as exceedance of applicable exceedances of applicable exceedances of applicable stated in SEPP(AQM)]. air quality standards [as air quality standards [as air quality standards [as stated in SEPP(AQM)]. stated in SEPP(AQM)]. stated in SEPP(AQM)] and resulting in adverse impacts on human health. Business Limited and temporary Reduced accessibility/ Reduced accessibility/ Reduced accessibility/ Permanently reduced reduction in local business functionality within a functionality for a number functionality to a single key accessibility/ functionality of accessibility/ functionality localised area. of local businesses across business area, or multiple multiple key business (within usual business Short-term (i.e. 6 to 12 the inner-west region. local businesses areas. fluctuations) in a localised months) reduction in Medium-term (i.e. one to throughout the inner-west area. business functionality. two years) reduction in region. business functionality. Long-term (i.e. over two years) reduction in business functionality.
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Aspect Insignificant Minor Moderate Major Severe Contamination and The release of The release of The release of The release of The release of spoil management contaminant(s) has no contaminant(s) is contaminant(s) into the contaminant(s) into the contaminant(s) into the measurable effect on the measurable but does not environment causes environment causes environment causes environment result in a loss of one or temporary and reversible permanent loss of one of permanent loss of one or more beneficial uses of the loss of one or more more beneficial uses of the more beneficial uses of the environment beneficial uses of the environment on a localised environment across a large environment scale geographic area No disturbance of Handling (including Handling (including Handling (including Widespread irreversible contaminated soils, acid transportation, treatment transportation, treatment transportation, treatment risk to human health and/or sulfate soils / rocks and/or disposal) of and/or disposal) of and/or disposal) of the environment from contaminated soil and/or contaminated soil and/or contaminated soil and/or handling (including acid sulphate soils or rock acid sulphate soils or rock, sulphate soils or rock with transportation, treatment with negligible risk to with localised risk to human risk to human health and/or and/or disposal) of human health and/or the health and/or the the environment in a contaminated soil and/or environment. environment. number of localised areas. acid sulphate soils or rock. Ecology – Remnant Insignificant loss of native Limited impact on native Moderate loss of native Substantial impact on Significant impact on native vegetation vegetation (<0.1 ha). vegetation (0.1–1.0 ha), or vegetation (1.0–5 ha), native vegetation or (5– vegetation or (> 25 ha) Loss of some common site of local ecological No net loss achievable 25 ha) No net loss not achievable significance. plants or individuals Loss (<1% of total No net loss achievable Significant Loss (>5% of No net loss achievable No net loss achievable distribution) of an FFG Loss (<5% of total total distribution) of an FFG No impacts to FFG listed No impacts to FFG listed listed community distribution) of an FFG listed community communities communities listed community
Ecology – Fauna Insignificant loss of Limited impacts to common Moderate impact on a Substantial impact on Significant change in a individuals or minor species population that is individuals of a population population and impact on behavioural changes No detectable impact on significant at a local or that is threatened at a the population viability of a Impacts not considered rare or near-threatened regional level for listed- State or Commonwealth species threatened at a detectable species threatened species level State or Commonwealth level Ecology – Aquatic Insignificant loss of Limited impacts to common Moderate impact on a Substantial impact on Significant change in a ecology individuals or minor species population that is individuals of a population population and impact on behavioural changes No detectable impact on significant at a local or that is threatened at a the population viability of a Impacts not considered rare or near-threatened regional level for listed- State level species threatened at a detectable species threatened species State level
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Aspect Insignificant Minor Moderate Major Severe Ecology – Planted Insignificant change to Limited loss of habitat Moderate loss of habitat Substantial loss of habitat Permanent widespread vegetation habitat connectivity and connectivity and canopy connectivity and canopy connectivity and canopy loss of habitat connectivity canopy cover cover in a localised area cover in multiple localised cover in multiple local and canopy cover across areas areas the project alignment Greenhouse gas Construction or operation Construction or operation Construction or operation Construction or operation Construction or operation energy use and GHG energy use and GHG energy use and GHG energy use and GHG energy use and GHG emissions p.a. is emissions p.a. is marginal emissions p.a. is emissions p.a. is emissions p.a. is significant insignificant that is, the that is, the project is below measureable that is, the substantial that is, the that is, the project project is near to or on par the NGER Scheme project triggers, or is over, project increases Victoria’s increases Victoria’s annual with the ‘no project’ reporting requirements. the NGER Scheme annual transportation transportation sector’s scenario. reporting requirements. sector’s GHG emissions by GHG emissions by more more than 1%. than 10%. Ground movement Ground movement beyond Slight damage to assets, Some damage to assets, Partial loss of asset Complete loss of asset background levels causes that does not impact on resulting in some minor or function as a result of function as a result of no measurable damage to serviceability of asset and temporary loss of asset extensive damage to asset, complete destruction asset. is easily repaired. function which can be Can be repaired with effort, and/or large scale damage readily repaired. but may require some requiring extensive major replacement and/or engineering works for structural reinforcement. rectification or Cost of rectification likely to reconstruction. Cost of exceed $1M. rectification likely to exceed $10M. Groundwater Changes to groundwater Changes to groundwater Changes to groundwater Changes to groundwater Changes to groundwater levels or flows, or release levels or flows, or release levels or flows, or release levels or flows, or release levels or flows, or release or movement of or movement of of contaminants into the of contaminants into the of contaminants into the contaminants have no contaminant is measurable environment causes environment causes environment causes measurable effect for but is within range of temporary and reversible permanent loss of one or permanent loss of one or groundwater users. typical natural variation or loss of one or more more beneficial uses of the more beneficial uses of the does not result in a loss of beneficial uses of the groundwater on a localised groundwater across a large one or more beneficial groundwater. scale. geographic area. uses of the groundwater.
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Aspect Insignificant Minor Moderate Major Severe Historical heritage No detectable impact on Partial reduction in the Significant reduction or Significant reduction or Widespread loss of the values of heritage heritage values of a locally complete loss of the complete loss of the heritage values of locally or places. significant place. heritage values of one or heritage values of a State State significant places. No disturbance of Detectable impact on a more local significant significant heritage place. archaeological sites. state significant heritage places. place but overall heritage Partial reduction in the values retained intact. heritage values of a State significant place. Loss of the heritage values of an archaeological site or sites not included in the VHR (included in the VHI or previously unknown) Human health No measurable* change in Measurable change in Measurable change in Measurable change in Measurable change in impact on human health human health risks and human health risks and human health risks and human health risks and impacts, both acute and impacts exceeds acute impacts exceeds acute impacts, both acute and chronic, are below health health based guidelines, health based guidelines, chronic, exceed health based guidelines or but are below chronic but are below chronic based guidelines or determined to be negligible health based guidelines in health based guidelines in deemed to be an isolated area and are a local area and are unacceptable determined to be determined to be acceptable acceptable * the term “no measurable” or “not measurable” is used in the HIA when referring to changes in air quality, noise or health outcomes in a population. For air quality and noise, a change that would be not be measurable is one where the estimated change in the concentration of the pollutant in ambient air, or noise, is so small that it could not be measured - i.e. within the error of the analytical method/measurement equipment. For health outcomes, it refers to exposures that are below a threshold so there are no health effects, or to changes in the number of people that may be affected (i.e. increase or decrease in deaths or hospitalisations) that is within the error/variability of the statistical measures (i.e. is not measurable). Land use planning – Land use changes entirely Land use changes broadly Land use changes Land use changes Land use changes planning policy consistent with planning consistent with planning somewhat inconsistent with significantly inconsistent inconsistent with nationally policies, strategic plans policies, strategic plans local planning policies, with regionally/ state significant planning policies and relevant development and relevant development strategic plans and relevant significant planning and strategic plans. area structure plans. area structure plans with a development area structure policies, strategic plans Permanently affects limited impact on capacity plans with a moderate and relevant development capacity to provide land for to provide land for impact on the capacity to area structure plans with a nationally significant residential or economic provide land for locally major impact on the residential or economic growth. significant residential or capacity to provide land for growth. economic growth. state significant residential or economic growth.
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Aspect Insignificant Minor Moderate Major Severe No effect on ability for Temporary effect on ability Permanently affects ability Permanently affects ability Permanently affects ability existing land use to for existing land use to for existing land use to for existing land use to for existing land use to continue in accordance continue in accordance continue in accordance continue in accordance continue in accordance with planning policies/ with planning policies/ with local planning policies/ with regionally/ state with nationally significant strategic plans. strategic plans. strategic plans. planning policies/ strategic planning policies/ strategic plans. plans. Landscape and Majority of the impacts Majority of the impacts Majority of the impacts Majority of the impacts Majority of the impacts visual would not be noticeable would be low or low to would be moderate would be moderate to high would be high moderate
Noise and vibration Applicable noise (surface) Isolated exceedance of Isolated exceedance of Exceedance of applicable Exceedance of applicable (surface) – Airborne standards met. No applicable noise standards applicable noise standards noise standards resulting in noise standards resulting in noise detectable effects. that are short lived (over a which are short or medium annoyance which requires significant and widespread 48 hour period or less). term in a local area (long temporary relocated of annoyance necessitating Minor number of than 48 hours). Significant some sensitive receptors. relocation of many complaints. number of complaints. sensitive receptors.
Noise and vibration Applicable noise (surface) Localised exceedance of Localised exceedance of Exceedance of applicable Exceedance of applicable (surface) – Surface standards met. No applicable surface vibration applicable surface vibration surface vibration standards surface vibration standards vibration (human detectable effects. standards resulting in standards resulting in resulting in annoyance that resulting in significant and amenity) annoyance that is short annoyance for an extended requires temporary widespread annoyance lived (over a 48 hour period period (more than two relocation of some necessitating relocation of or less). Minor number of nights). Significant number sensitive receptors. many sensitive receptors. complaints. of complaints. Noise and vibration Applicable structural Isolated exceedance of Isolated exceedance of Exceedance of applicable Major damage to multiple (surface) vibration (surface) applicable structural applicable structural structural vibration structures and/or - Surface vibration standards met. No vibration (surface) vibration (surface) (surface) standards infrastructure requiring (structural damage to detectable effects on standards however no standards causing causing damage to replacement, demolition or buildings or structures or infrastructure. residual damage. cosmetic damage to structures or infrastructure rebuild. Structure or asset infrastructure) structures or infrastructure. that leads to loss of rendered unusable. integrity or results in significant disruptions to service.
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Aspect Insignificant Minor Moderate Major Severe Noise and vibration No change in existing noise Small increase in noise Moderate increase in noise Significant increase in Widespread increase in (surface) – Airborne levels. level (>2 dB) however level (2-5 dB). Exceedance noise level (>5 dB). noise levels and noise from road traffic compliance with project of project traffic noise Exceedance of project exceedance of project criteria. criteria at isolated traffic noise criteria in traffic noise criteria as a locations. clusters within the project result of the project area. Noise and vibration No change in existing noise Compliance with SEPP N-1 Exceedance of applicable Exceedance of applicable Widespread exceedance of (surface) – Airborne levels. SEPP N-1 limits by 2 – 5 SEPP N-1 limits by more SEPP N-1 limits as a result noise from fixed dB(A) than 5 dB(A) of the project infrastructure Social – displacement No displacement of Voluntary temporary Temporary disruption of Permanent displacement of Permanent displacement of residents or disruption of displacement of residents; access to residences in residents in localised residents in several areas movement patterns or temporary disruption for several areas; or temporary areas, or permanent or permanent adverse a small number of disruption to functionality of adverse changes to changes to movement residents social networks; or movement patterns patterns in several parts of temporary disruption of the region localised movement patterns. Social – community No change to access or Minor (short term or little Moderate reduction to Permanent major reduction A recreational or facilities and usage of a recreational or impact) reduction to access access or usage of a to access or usage of a community facility recreational uses community facility. or usage of a recreational recreational or community recreational or community completely loses access or or community facility. facility. facility. is no longer used. Social - Residential Short term or minimal Reversible adverse change Adverse change where Irreversible change where Irreversible change where amenity (social impact easily reversible where those affected could those affected could be those affected could be those affected could be implications of adverse change where be expected to have expected to have some expected to have limited expected to have little or no changed ‘physical’ those affected could be substantial capacity to capacity to adapt or cope. capacity to adapt or cope. capacity to adapt or cope. amenity) expected to easily adapt adapt or cope. or cope. Surface water – water Negligible change to river Changes to health with Changes to river health River health significantly Extensive impact and river quality health minor implications with moderate implications compromised health irreversibly disturbed Surface water – Negligible change to Changes to waterway, Changes to waterway, Waterway or floodplain Extensive impact to floodplain function waterway or floodplain floodplain function with floodplain function with function significantly waterway or floodplain function minor implications moderate implications compromised function irreversibly disturbed.
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Aspect Insignificant Minor Moderate Major Severe Transport – disruption No closures to existing Off-peak closures to Daytime closures of up to 6 Closures of up to 48 hours Closures to existing to motor vehicle traffic, Freeway traffic lanes, existing Freeway traffic hours to existing Freeway to existing Freeway traffic Freeway traffic lanes, major public transport, car roads, public transport lanes, major arterial roads traffic lanes, major arterial lanes, major arterial roads arterial roads or public parking, bicycle routes, car parks, bicycle or or public transport routes roads or public transport or public transport routes transport routes with no connectivity and pedestrian paths Short-term (up to 3 routes Long term closures to suitable alternative pedestrian movements months) closures to minor Medium-term (up to 6 minor roads and bicycle during construction roads and bicycle paths months) closures to minor paths, car parks and (with suitable detours in roads and bicycle paths pedestrian paths place), car parks and (with suitable detours in Closure of an arterial road, pedestrian paths place), car parks and public transport route or Closure of an arterial road, pedestrian paths shared use path with a public transport route or Closure of an arterial road, route greater than 2km for shared use path with a public transport route or road vehicles, 1km for diversion of up to 1km for shared use path with a cyclists and 400m road vehicles and 200m for diversion 1-2km for road pedestrians cyclists and pedestrians vehicles 1km for cyclists and 400m for pedestrians Transport – disruption No increase in congestion 0-30 seconds increase Detectable adverse change Increase in travel times of Traffic and transport to motor vehicle traffic, at nodes travel time. of 30 seconds - 6 minutes greater than 6 minutes. congestion lead to the public transport, car No permanent closures to Closure of bicycle or in travel times. Closure of bicycle or closure of roads with no parking, bicycle existing roads, public pedestrian path requiring Closure of bicycle or pedestrian path requiring suitable alternative connectivity and transport routes, car parks, diversion of 200m. pedestrian path requiring diversion of greater than Closure of a principal pedestrian movements bicycle or pedestrian paths diversion of 200m-1km 1km bicycle or pedestrian path during operation with no suitable alternative
Transport – delay to No delay at intersections 0-30 second increase in Detectable adverse change Increase in delay at Delays on arterial roads, motor vehicle traffic , No delay to existing public delays at intersections in delays at intersections intersections of greater with no suitable alternative public transport, transport routes or 0-30 second increase in for general traffic than 6 minutes route bicycle and pedestrian timetables, or to pedestrian cycle times for public Detectable adverse delay Increase in adverse delay Delays on public transport movements during or bicycle movements transport movements in cycle times for public at intersections for public routes, resulting in operation through intersections, or transport movements transport movements, or compromised timetables bicycle and pedestrian wait through intersections, and pedestrian and bicycle wait and loss of journey time times bicycle or pedestrian wait times of greater than 3 reliability times minutes
Transport – road No increase in the risk of Increase risk of collisions Increase risk of collisions Increase risk of collisions Increase risk of collisions safety during additional collisions by 5% by 10% by20% by greater than 20% or an construction and increase of the number of operation fatalities
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Aspect Insignificant Minor Moderate Major Severe Vibration and Impacts not detectable Localised annoyance with Extensive annoyance Impacts necessitating the Impacts resulting in regenerated noise minor complaints resulting in many temporary relocation of catastrophic failure event (tunnel) – amenity complaints occupants to manage causing widespread vibration and regenerated disruption or evacuation of noise impacts occupants Vibration and No impact to infrastructure Superficial damage to Superficial damage to Significant damage to Structural damage to regenerated noise infrastructure that does not infrastructure that requires infrastructure that requires multiples properties that (tunnel) – damage require repair repair by local small repairs or replacement with requires significant repairs, contractor some disruptions to demolition or rebuild by service/use specialised contractors. Asset is not unusable and requires repairs to establish asset use Vibration and Impacts do not affect Equipment usage restricted Equipment requires Equipment requires repair Equipment damaged regenerated noise equipment operation to periods when vibration is recalibration or by specialised contractors beyond repair and requires (tunnel) – Equipment limited replacement of and/or recalibration replacement operation components by non- specialised technicians
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Appendix B Risk register
West Gate Tunnel Project | Environment Effects Statement Attachment II-31 Attachment II | Appendix B – Risk registers Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Aboriginal Cultural Heritage Construction Risks AHR01 West Gate Site clearance & Site clearance and R Prepare, gain approval and implement the Possible Minor Medium CHP1 - Cultural Heritage Management Plan Unlikely Minor Low Freeway construction construction site management conditions of a CHMP Comply with and implement the Cultural Heritage Management Plan (CHMP) Site establishment establishment activities and earthworks resulting in approved under the Aboriginal Heritage Act 2006. Earthworks disturbance/ destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values in a deteriorated condition with a high degree of disturbance evident and some cultural heritage remaining AHR02 West Gate Site clearance & Site clearance and R See AHR01 Unlikely Moderate Medium CHP1 (see AHR1) Rare Minor Low Freeway construction construction site Site establishment establishment activities and earthworks resulting in Earthworks disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of common occurrence with a limited range of cultural materials, in fair to good condition with some degree of disturbance evident AHR03 West Gate Site clearance & Site clearance and R See AHR01 Unlikely Major Medium CHP1 (see AHR1) Rare Moderate Low Freeway construction construction site Site establishment establishment activities Earthworks and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of rare occurrence and/or with a large number and diverse range of cultural materials and/or stratified deposits AHR04 West Gate Site clearance & Site clearance and R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium Freeway construction construction site Site establishment establishment activities Earthworks and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of exceptional value as identified by Aboriginal Victoria and/or Traditional Owners, for example, a burial ARH05 West Gate Site clearance and Site clearance and P See AHR01 Possible Moderate Medium CHP1 (see AHR1) Possible Moderate Medium Freeway construction site construction site establishment establishment activities Earthworks and earthworks resulting in disturbance/destruction of registered Aboriginal cultural heritage places 7822-4067 (artefact scatter)
West Gate Tunnel Project | Environment Effects Statement 1 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ARH06 West Gate Site clearance and Site clearance and P See AHR01 Likely Moderate Medium CHP1 (see AHR1) Possible Moderate Medium Freeway construction site construction site establishment establishment activities Earthworks and earthworks resulting in disturbance/destruction of registered Aboriginal cultural heritage places 7822-4068 (LDAD) AHR07 West Gate Relocation of Relocation and protection R See AHR01 Rare Minor Low CHP1 (see AHR1) Rare Minor Low Freeway 220kV power lines of utilities resulting in and towers, disturbance/ destruction of protection of other previously unregistered utilities that may be Aboriginal cultural heritage impacted place(s) and/or associated cultural values in a deteriorated condition with a high degree of disturbance evident and some cultural heritage remaining AHR08 West Gate Relocation of Relocation and protection R See AHR01 Rare Moderate Low CHP1 (see AHR1) Rare Minor Low Freeway 220kV power lines of utilities resulting in and towers, disturbance/destruction of protection of other previously unregistered utilities that may be Aboriginal cultural heritage impacted place(s) and/or associated cultural values of common occurrence with a limited range of cultural materials, in fair to good condition with some degree of disturbance evident AHR09 West Gate Relocation of Relocation and protection R See AHR01 Rare Major Low CHP1 (see AHR1) Rare Moderate Low Freeway 220kV power lines of utilities resulting in and towers, disturbance/destruction of protection of other previously unregistered utilities that may be Aboriginal cultural heritage impacted place(s) and/or associated cultural values of rare occurrence and/or with a large number and diverse range of cultural materials and/or stratified deposits AHR10 West Gate Relocation of Relocation and protection R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium Freeway 220kV power lines of utilities resulting in and towers, disturbance/destruction of protection of other previously unregistered utilities that may be Aboriginal cultural heritage impacted place(s) and/or associated cultural values of exceptional value as identified by Aboriginal Victoria and/or Traditional Owners, for example, a burial AHR11 West Gate Relocation of Site clearance and P See AHR01 Possible Moderate Medium CHP1 (see AHR1) Possible Moderate Medium Freeway 220kV power lines construction site and towers, establishment activities protection of other and earthworks resulting in utilities that may be disturbance/destruction of impacted registered Aboriginal cultural heritage places 7822-4067 (artefact scatter)
2 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AHR12 West Gate Relocation of Site clearance and P See AHR01 Likely Moderate Medium CHP1 (see AHR1) Possible Moderate Medium Freeway 220kV power lines construction site and towers, establishment activities protection of other and earthworks resulting in utilities that may be disturbance/destruction of impacted registered Aboriginal cultural heritage places 7822-4068 (LDAD) AHR13 West Gate Construction of Site clearance and R See AHR01 Possible Minor Medium CHP1 (see AHR1) Unlikely Minor Low Freeway new ramps to Hyde construction site Street establishment activities and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values in a deteriorated condition with a high degree of disturbance evident and some cultural heritage remaining AHR14 West Gate Construction of Site clearance and R See AHR01 Unlikely Moderate Medium CHP1 (see AHR1) Rare Minor Low Freeway new ramps to Hyde construction site Street establishment activities and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of common occurrence with a limited range of cultural materials, in fair to good condition with some degree of disturbance evident AHR15 West Gate Construction of Site clearance and R See AHR01 Unlikely Major Medium CHP1 (see AHR1) Rare Moderate Low Freeway new ramps to Hyde construction site Street establishment activities and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of rare occurrence and/or with a large number and diverse range of cultural materials and/or stratified deposits AHR16 West Gate Construction of Site clearance and R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium Freeway new ramps to Hyde construction site Street establishment activities and earthworks resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of exceptional value as identified by Aboriginal Victoria and/or Traditional Owners, for example, a burial
West Gate Tunnel Project | Environment Effects Statement 3 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AHR17 Tunnels Site clearance & Site clearance and R See AHR01 Unlikely Minor Low CHP1 (see AHR1) Rare Minor Low construction construction site Site establishment establishment activities and dive structures/portal Dive structure/ construction resulting in portal construction disturbance/ destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values in a deteriorated condition with a high degree of disturbance evident and some cultural heritage remaining AHR18 Tunnels Site clearance & Site clearance and R See AHR01 Rare Moderate Low CHP1 (see AHR1) Rare Minor Low construction construction site Site establishment establishment activities Dive structure/ and dive structures/portal construction resulting in portal construction disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of common occurrence with a limited range of cultural materials, in fair to good condition with some degree of disturbance evident AHR19 Tunnels Site clearance & Site clearance and R See AHR01 Rare Major Low CHP1 (see AHR1) Unlikely Moderate Low construction construction site Site establishment establishment activities and dive structures/portal Dive structure/ portal construction construction resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of rare occurrence and/or with a large number and diverse range of cultural materials and/or stratified deposits AHR20 Tunnels Site clearance & Site clearance and R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium construction construction site Site establishment establishment activities Dive structure/ and dive structures/portal portal construction construction resulting in disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of exceptional value as identified by Aboriginal Victoria and/or Traditional Owners, for example, a burial AHR21 Tunnels North Yarra Main Realignment and R See AHR01 Possible Minor Medium CHP1 (see AHR1) Unlikely Minor Low Sewer realignment protection of utilities and protection of resulting in other utilities disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values in a deteriorated condition with a high degree of disturbance evident and some cultural heritage remaining
4 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AHR22 Tunnels North Yarra Main Realignment and R See AHR01 Unlikely Moderate Medium CHP1 (see AHR1) Rare Minor Low Sewer realignment protection of utilities and protection of resulting in other utilities disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of common occurrence with a limited range of cultural materials, in fair to good condition with some degree of disturbance evident AHR23 Tunnels North Yarra Main Realignment and R See AHR01 Rare Major Low CHP1 (see AHR1) Rare Moderate Low Sewer realignment protection of utilities and protection of resulting in other utilities disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of rare occurrence and/or with a large number and diverse range of cultural materials and/or stratified deposits AHR24 Tunnels North Yarra Main Realignment and R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium Sewer realignment protection of utilities and protection of resulting in other utilities disturbance/destruction of previously unregistered Aboriginal cultural heritage place(s) and/or associated cultural values of exceptional value as identified by Aboriginal Victoria and/or Traditional Owners, for example, a burial AHR25 Port, City Construction of Bridge, viaduct, city R See AHR01 Rare Minor Low CHP1 (see AHR1) Rare Minor Low Link and city bridge over the connections and connections Maribyrnong River associated civil and associated civil infrastructure works infrastructure works resulting in disturbance/ Construction of the destruction of previously twin viaducts and unregistered Aboriginal associated civil cultural heritage place(s) infrastructure works and/or associated cultural Construction of the values in a deteriorated new city condition with a high degree of disturbance connections and evident and some cultural associated civil infrastructure works heritage remaining AHR26 Port, City Construction of Bridge, viaduct, city R See AHR01 Rare Moderate Low CHP1 (see AHR1) Rare Minor Low Link and city bridge over the connections and connections Maribyrnong River associated civil and associated civil infrastructure works infrastructure works resulting in Construction of the disturbance/destruction of twin viaducts and previously unregistered associated civil Aboriginal cultural heritage infrastructure works place(s) and/or associated cultural values of common Construction of the new city occurrence with a limited range of cultural materials, connections and in fair to good condition associated civil infrastructure works with some degree of disturbance evident
West Gate Tunnel Project | Environment Effects Statement 5 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AHR27 Port, City Construction of Bridge, viaduct, city R See AHR01 Rare Major Low CHP1 (see AHR1) Rare Moderate Low Link and city bridge over the connections and connections Maribyrnong River associated civil and associated civil infrastructure works infrastructure works resulting in Construction of the disturbance/destruction of twin viaducts and previously unregistered associated civil Aboriginal cultural heritage infrastructure works place(s) and/or associated Construction of the cultural values of rare occurrence and/or with a new city large number and diverse connections and associated civil range of cultural materials and/or stratified deposits infrastructure works AHR28 Port, City Construction of Bridge, viaduct, city R See AHR01 Rare Severe Medium CHP1 (see AHR1) Rare Severe Medium Link and city bridge over the connections and connections Maribyrnong River associated civil and associated civil infrastructure works infrastructure works resulting in disturbance/ Construction of the destruction of previously twin viaducts and unregistered Aboriginal associated civil cultural heritage place(s) infrastructure works and/or associated cultural Construction of the values of exceptional value as identified by Aboriginal new city Victoria and/or Traditional connections and associated civil Owners, for example, a burial infrastructure works Operation Risks Not applicable for Aboriginal Cultural Heritage Air Quality Construction Risks AQR01 West Gate Site clearance & Deposition of larger dust R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 - Air quality during construction Possible Moderate Medium Freeway construction site particles causing aesthetic Environmental Management Plan based on EPAV Manage construction activities in accordance with EPA Victoria Publication 480 establishment impacts on buildings and Environmental Guidelines for Major Construction Guidelines for Major Construction Sites, to maintain air quality to a standard which vehicles at sensitive Sites and City of Melbourne Construction does not prejudice the health and amenity of nearby residents, open spaces and receptor locations. Management Plan Guidelines, incorporating dust community facilities. control measures. Conduct of dust deposition monitoring programme to establish compliance Develop and implement an Air Quality Management and Monitoring Plan including with Victorian dust deposition criteria (as in respect of dust, odour, and construction vehicle emissions to minimise impacts reproduced in the Mining and Extractive Industries during construction. Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR02 West Gate Earthworks Deposition of larger dust R Initial AQP6. Compliance with Construction Almost Moderate High AQP6 (see AQR01) Almost Minor Medium Freeway particles causing aesthetic Environmental Management Plan based on EPAV Certain Certain impacts on buildings and Environmental Guidelines for Major Construction vehicles at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR03 West Gate Earthworks Generation of PM10 and R Initial AQP6. Compliance with Construction Likely Minor Medium AQP6 (see AQR01) Likely Minor Medium Freeway PM2.5 from soil Environmental Management Plan based on EPAV disturbance causing health Environmental Guidelines for Major Construction impacts at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management).
6 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR04 West Gate Earthworks Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium Freeway exposure, stockpiling and Environmental Management Plan, based on transportation of EPAV Environmental Guidelines for Major contaminated or anaerobic Construction Sites and City of Melbourne soil, with resultant Construction Management Plan Guidelines, aesthetic impacts on incorporating odour management measures. sensitive receptor Refer to Environmental Performance locations. Requirements AQP6 (Construction Activities Management) and CS5 (Spoil Odour Management). AQR05 West Gate Earthworks Products of combustion R Initial AQP6. Compliance with Construction Possible Minor Low AQP6 (see AQR01) Possible Minor Low Freeway (including PM10, PM2.5, Environmental Management Plan, based on CO, NOx, SO2, VOC and EPAV Environmental Guidelines for Major SVOC) resulting from Construction Sites and City of Melbourne operation of diesel fuelled Construction Management Plan Guidelines, taking heavy equipment due regard of VicRoads INVEST sustainability impacting on sensitive tool requirements. Use of modern heavy receptor locations. equipment equipped with diesel particulate filters. Refer to Environmental Performance Requirements AQP6 (Construction Activities Management). AQR06 West Gate Construction of Deposition of larger dust R Initial AQP6. Compliance with Construction Almost Moderate High AQP6 (see AQR01) Almost Minor Medium Freeway surface roads and particles causing aesthetic Environmental Management Plan based on EPAV Certain Certain other civil impacts on buildings and Environmental Guidelines for Major Construction infrastructure vehicles at sensitive Sites and City of Melbourne Initial AQP6. receptor locations. Construction Management Plan Guidelines, incorporating dust control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR07 West Gate Construction of Generation of PM10 and R Initial AQP6. Compliance with Construction Likely Minor Medium AQP6 (see AQR01) Likely Minor Medium Freeway surface roads and PM2.5 from soil and rock Environmental Management Plan based on EPAV other civil handling causing health Environmental Guidelines for Major Construction infrastructure impacts at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR08 West Gate Construction of Generation of odour due to R Initial AQP6. Compliance with Construction Almost Moderate High AQP6 (see AQR01) Almost Minor Medium Freeway surface roads and laying of asphalt with Environmental Management Plan, based on Certain Certain other civil resultant aesthetic impacts EPAV Environmental Guidelines for Major infrastructure on sensitive receptor Construction Sites and City of Melbourne locations. Construction Management Plan Guidelines, incorporating odour management measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR09 West Gate Construction of Products of combustion R Initial AQP6. Compliance with Construction Possible Minor Low AQP6 (see AQR01) Possible Minor Low Freeway surface roads and (including PM10, PM2.5, Environmental Management Plan, based on other civil CO, NOx, SO2 and semi- EPAV Environmental Guidelines for Major infrastructure volatile organic Construction Sites and City of Melbourne compounds) resulting from Construction Management Plan Guidelines, taking operation of diesel fuelled due regard of VicRoads INVEST sustainability heavy equipment tool requirements. Use of modern machinery impacting on sensitive equipped with diesel particulate filters. Refer to receptor locations. Environmental Performance Requirement AQP6 (Construction Activities Management). AQR10 West Gate Road design Underestimation of traffic R Initial AQP6. Conservative assumptions in air Possible Minor Low AQP6 (see AQR01) Possible Minor Low Freeway volumes resulting in higher quality modelling together with roadside ambient than anticipated ambient air quality monitoring. Compliance with regulatory air quality impacts on requirements, including State Environment sensitive receptors. Protection Policy (Air Quality Management) intervention levels. Comparison with State Environment Protection Policy (Ambient Air Quality) ambient air quality standards.
West Gate Tunnel Project | Environment Effects Statement 7 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR11 Tunnels Site clearance & Deposition of larger dust P Initial AQP6. Compliance with regulatory Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium construction site particles causing aesthetic requirements, including State Environment establishment impacts on buildings and Protection Policy (Air Quality Management) and vehicles at sensitive the dust deposition provisions of the Mining and receptor locations. Extractive Industries Protocol for Environmental Management. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR12 Tunnels North Yarra Main Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium Sewer realignment raw sewage and/or Environmental Management Plan, based on and protection of exposure, stockpiling and EPAV Environmental Guidelines for Major other utilities transportation of Construction Sites and City of Melbourne contaminated or anaerobic Construction Management Plan Guidelines, soil, with resultant incorporating odour management measures. aesthetic impacts on Compliance with approved Odour Management sensitive receptor Plan, in accordance with Melbourne Water locations. Performance Criteria for the West Gate Tunnel Project. Refer to Environmental Performance Requirements AQP6 (Construction Activities Management) and CS5 (Spoil Odour Management). AQR13 Tunnels Dive structure / Generation of odour from P Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium portal construction tunnel ventilation during Environmental Management Plan, based on tunnel boring operations. EPAV Environmental Guidelines for Major Construction Sites and City of Melbourne Construction Management Plan Guidelines, incorporating odour management measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR14 Tunnels Precast plant Potential impact on air P Initial AQP6. Compliance with Construction Possible Minor Low AQP6 (see AQR01) Possible Minor Low construction and quality due to dust, odour Environmental Management Plan, based on manufacturing of or other emissions for plant EPAV Environmental Guidelines for Major precast units affecting sensitive receptor Construction Sites and City of Melbourne locations Construction Management Plan Guidelines, incorporating odour management measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR15 Tunnels Tunnelling activities Generation of odour from P Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium tunnel ventilation during Environmental Management Plan based on EPAV tunnel boring operations Environmental Guidelines for Major Construction and exposure, stockpiling Sites and City of Melbourne Construction and transportation of Management Plan Guidelines, incorporating contaminated or anaerobic odour management measures. Refer to soil, with resultant Environmental Performance Requirements AQP6 aesthetic impacts on (Construction Activities Management) and CS5 sensitive receptor (Spoil Odour Management). locations. AQR16 Tunnels Tunnel ventilation Underestimation of traffic P Initial AQP6. Ventilation system design and air Possible Minor Low AQP6 (see AQR01) Possible Minor Low system design volumes resulting in higher quality modelling sensitivity analysis based on than anticipated in-tunnel maximum congested traffic volumes. Compliance and ambient air quality with regulatory requirements, including Victorian impacts on road tunnel and PIARC in-tunnel air quality criteria and State users and sensitive Environment Protection Policy (Air Quality receptors. Management) modelling design criteria. Refer to Environmental Performance Requirements AQP1 (SEPP(AQM) Compliance), AQP2 (Tunnel Portal Emissions) and AQP3 (In-Tunnel Air Quality & Pollution Control Equipment). AQR17 Port, CityLink Site clearance & Deposition of larger dust R Initial AQP6. Compliance with Construction Rare Minor Negligible AQP6 (see AQR01) Rare Minor Negligible and city construction site particles causing aesthetic Environmental Management Plan based on EPAV connections establishment impacts on buildings and Environmental Guidelines for Major Construction vehicles at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management).
8 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR18 Port, CityLink Earthworks Deposition of larger dust R Initial AQP6. Compliance with Construction Possible Minor Low AQP6 (see AQR01) Possible Minor Low and city particles causing aesthetic Environmental Management Plan based on EPAV connections impacts on buildings and Environmental Guidelines for Major Construction vehicles at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR19 Port, CityLink Earthworks Generation of PM10 and R Initial AQP6. Compliance with Construction Unlikely Minor Low AQP6 (see AQR01) Unlikely Minor Low and city PM2.5 from soil Environmental Management Plan based on EPAV connections disturbance causing health Environmental Guidelines for Major Construction impacts at sensitive Sites and City of Melbourne Construction receptor locations. Management Plan Guidelines, incorporating dust control measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR20 Port, CityLink Earthworks Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium and city exposure, stockpiling and Environmental Management Plan, based on connections transportation of EPAV Environmental Guidelines for Major contaminated or anaerobic Construction Sites and City of Melbourne soil, with resultant Construction Management Plan Guidelines, aesthetic impacts on incorporating odour management measures. sensitive receptor Refer to Environmental Performance locations. Requirements AQP6 (Construction Activities Management) and CS5 (Spoil Odour Management). AQR21 Port, CityLink Construction of Deposition of larger dust R Initial AQP6. Compliance with Construction Unlikely Minor Low AQP6 (see AQR01) Unlikely Minor Low and city bridge over the particles causing aesthetic Environmental Management Plan based on EPAV connections Maribyrnong River impacts on buildings and Environmental Guidelines for Major Construction and Moonee Ponds vehicles at sensitive Sites and City of Melbourne Construction Creek and receptor locations. Management Plan Guidelines, incorporating dust associated civil control measures. Conduct of dust deposition infrastructure works monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). Generation of PM10 and Refer to Environmental Performance Requirement PM2.5 causing health AQP6 (Construction Activities Management). impacts at sensitive receptor locations. Products of combustion Management plans above and taking due regard (including PM10, PM2.5, of VicRoads INVEST sustainability tool CO, NOx, SO2 and semi- requirements. Use of modern machinery equipped volatile organic with diesel particulate filters. Refer to compounds) resulting from Environmental Performance Requirement AQP6 operation of diesel fuelled (Construction Activities Management). heavy equipment impacting on sensitive receptor locations AQR22 Port, CityLink Construction of Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium and city bridge over the laying of asphalt with Environmental Management Plan, based on connections Maribyrnong River resultant aesthetic impacts EPAV Environmental Guidelines for Major and Moonee Ponds on sensitive receptor Construction Sites and City of Melbourne Creek and locations. Construction Management Plan Guidelines, associated civil incorporating odour management measures in infrastructure works accordance with EMR Code CS5 of the Transurban Environmental Performance Requirements. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management).
West Gate Tunnel Project | Environment Effects Statement 9 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR23 Port, CityLink Construction of the Deposition of larger dust R Initial AQP6. Compliance with Construction Unlikely Minor Low AQP6 (see AQR01) Unlikely Minor Low and city twin viaducts and particles causing aesthetic Environmental Management Plan based on EPAV connections the shared user impacts on buildings and Environmental Guidelines for Major Construction path and vehicles at sensitive Sites and City of Melbourne Construction associated civil receptor locations. Management Plan Guidelines, incorporating dust infrastructure works control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). Generation of PM10 and Management plans above incorporating dust PM2.5 causing health control measures. Refer to Environmental impacts at sensitive Performance Requirement AQP6 (Construction receptor locations. Activities Management). Products of combustion Management plans above and having due regard (including PM10, PM2.5, of VicRoads INVEST sustainability tool CO, NOx, SO2 and semi- requirements. Use of modern machinery equipped volatile organic with diesel particulate filters. Refer to compounds) resulting from Environmental Performance Requirement AQP6 operation of diesel fuelled (Construction Activities Management). heavy equipment impacting on sensitive receptor locations AQR24 Port, CityLink Construction of the Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium and city twin viaducts and laying of asphalt with Environmental Management Plan, based on connections the shared user resultant aesthetic impacts EPAV Environmental Guidelines for Major path and on sensitive receptor Construction Sites and City of Melbourne associated civil locations. Construction Management Plan Guidelines, infrastructure works incorporating odour management measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). AQR25 Port, CityLink Construction of the Deposition of larger dust R Initial AQP6. Compliance with Construction Unlikely Minor Low AQP6 (see AQR01) Unlikely Minor Low and city new city particles causing aesthetic Environmental Management Plan based on EPAV connections connections and impacts on buildings and Environmental Guidelines for Major Construction associated civil vehicles at sensitive Sites and City of Melbourne Construction infrastructure works receptor locations. Management Plan Guidelines, incorporating dust control measures. Conduct of dust deposition monitoring programme to establish compliance with Victorian dust deposition criteria (as reproduced in the Mining and Extractive Industries Protocol for Environmental Management). Refer to Environmental Performance Requirement AQP6 (Construction Activities Management). Generation of PM10 and Management plans above. Refer to PM2.5 causing health Environmental Performance Requirement AQP6 impacts at sensitive (Construction Activities Management). receptor locations. Products of combustion Management plans above and taking due regard (including PM10, PM2.5, of VicRoads INVEST sustainability tool CO, NOx, SO2 and semi- requirements. Use of modern machinery equipped volatile organic with diesel particulate filters. Refer to compounds) resulting from Environmental Performance Requirement AQP6 operation of diesel fuelled (Construction Activities Management). heavy equipment impacting on sensitive receptor locations. AQR26 Port, CityLink Construction of the Generation of odour due to R Initial AQP6. Compliance with Construction Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium and city new city laying of asphalt with Environmental Management Plan, based on connections connections and resultant aesthetic impacts EPAV Environmental Guidelines for Major associated civil on sensitive receptor Construction Sites and City of Melbourne infrastructure works locations. Construction Management Plan Guidelines, incorporating odour management measures. Refer to Environmental Performance Requirement AQP6 (Construction Activities Management).
10 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR27 Port, CityLink Road design Underestimation of traffic R Initial AQP6. Conservative assumptions in air Possible Minor Low AQP6 (see AQR01) Possible Minor Low and city volumes resulting in higher quality modelling. Compliance with regulatory connections than anticipated ambient requirements, including State Environment air quality impacts on Protection Policy (Air Quality Management) sensitive receptors. intervention levels. Comparison with State Environment Protection Policy (Ambient Air Quality) ambient air quality standards. Operation Risks AQR28 West Gate West Gate Impact on sensitive R Initial AQP4. VicRoads traffic management, Almost Minor Medium AQP4 Ambient air quality Almost Minor Medium Freeway Freeway receptors from air quality however it is noted that community consultation Certain Develop and undertake an ambient air quality monitoring program to measure the Certain operations changes associated with indicated an existing level of concern in regard to air quality impacts of West Gate Tunnel Project, including at least one year of operation and air quality issues associated with West Gate monitoring before operation, and five years post opening of the Freeway, or such maintenance, based on Freeway. Pre and post project ambient air quality lessor period as agreed with EPA Victoria. Results of the monitoring are to be traffic volume projections monitoring to assess these concerns. Refer to made publicly available. Environmental Performance Requirement AQP4 (Ambient Monitoring Programme). AQR29 West Gate West Gate Underestimation of traffic R Initial AQP1, AQP3 and AQP4. Pre and post Possible Minor Low AQP1 Tunnel ventilation system design Possible Minor Low Freeway Freeway volumes resulting in higher project ambient air quality monitoring. VicRoads Design and implement a tunnel ventilation system to meet the requirements of the operations than anticipated ambient traffic management, however it is noted that SEPP (AQM) and in accordance with the requirements of the EPA Victoria Works air quality impacts on community consultation indicated an existing level Approval. sensitive receptors. of concern in regard to air quality issues AQP3 In tunnel air quality associated with West Gate Freeway. Refer to Environmental Performance Requirement AQP4 Design and implement a tunnel ventilation system to introduce and remove air from (Ambient Monitoring Programme). the tunnels to meet in tunnel air quality requirements for carbon monoxide (CO) listed below including provision for the retrofitting of pollution control equipment. Achieve a longitudinal air velocity in the Tunnels not exceeding 10 metres/second. In tunnel air quality must meet the following CO standards: x Maximum peak value of 150ppm x 15 min. average of 50ppm x 2-hour average of 25ppm. AQP4 (see AQR28) AQR30 Tunnels Tunnel operations Impact on sensitive R Initial AQP2, AQP4 and AQP5. Environmental Almost Minor Medium AQP2 Zero portal emissions Almost Minor Medium receptors due to NO2, Management Plan, incorporating best practice Certain Design and implement a tunnel ventilation system to achieve zero portal emissions. Certain PM10 and PM2.5 measures to minimise emissions through traffic AQP4 (see AQR28) emissions to air from the management and instrumentation maintenance tunnel portals and and calibration. EPAV Waste Discharge Licence AQP5 In-tunnel air quality and ventilation structure emissions compliance ventilation structures. incorporating ventilation stack pollutant emission Monitor the in-tunnel air quality and ventilation structure emissions during operation limits and conditions relating to tunnel portal of the ventilation system to demonstrate compliance with EPR AQP3, SEPP (Air emissions. Refer to Environmental Performance Quality Management) and the EPA Victoria licence to the satisfaction of EPA Requirements AQP2 (Tunnel Portal Emissions), Victoria. Report the monitoring results publicly on a quarterly basis for five years AQP4 (Ambient Monitoring Programme) and post opening of the Freeway or such lessor period as agreed with EPA Victoria. AQP5 (EPAV Licence Compliance). Take remedial action if Environmental Requirements are not met, in consultation with EPA Victoria. AQR31 Tunnels Tunnel operations Impact on sensitive R Initial AQP2, AQP4 and AQP5. EPAV Waste Almost Insignificant Low AQP2 (see AQR30) Possible Insignificant Low receptors due to emissions Discharge Licence incorporating ventilation stack Certain AQP4 (see AQR28) Almost to air of pollutants other pollutant emission limits and conditions relating to Certain AQP5 (see AQR30) than NO2, PM10 and tunnel portal emissions. Refer to Environmental PM2.5 from the tunnel Performance Requirements AQP2 (Tunnel Portal portals and ventilation Emissions), AQP4 (Ambient Monitoring structures. Programme) and AQP5 (EPAV Licence Compliance). AQR32 Tunnels Tunnel operations Potential impact on road R Initial AQP5. Conservative ventilation system Almost Minor Medium AQP5 (see AQR30) Almost Minor Medium users due to in-tunnel air design based on congested tunnel traffic volumes. Certain Certain quality. VicRoads and Transurban traffic management. Installation, operation and calibration of air quality monitoring and ventilation system control instrumentation. EPAV Waste Discharge Licence conditions relating to in-tunnel air quality. Refer to Environmental Performance Requirement AQP5 (EPAV Licence Compliance).
West Gate Tunnel Project | Environment Effects Statement 11 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R AQR33 Tunnels Tunnel operations Underestimation of traffic R Initial AQP1 AQP2 and AQP3. Environmental Possible Minor Low AQP1 (see AQR29) Possible Minor Low volumes resulting in higher Management Plan, incorporating best practice AQP2 (see AQR30) than anticipated ambient measures to minimise emissions through traffic AQP3 (see AQR29) air quality impacts on road management and instrumentation maintenance tunnel users and sensitive and calibration. EPAV Waste Discharge Licence receptors. incorporating ventilation stack pollutant emission limits and conditions relating to tunnel portal emissions. Air quality modelling sensitivity analysis. VicRoads and Transurban traffic management. Refer to Environmental Performance Requirements AQP1 (Ventilation System Design), AQP2 (Portal Emissions), AQP3 (In-Tunnel Air Quality and Pollution Control Equipment) and AQP5 (EPAV Licence Compliance). AQR34 Port, CityLink Port, city and Impact on sensitive R Initial AQP4. VicRoads, Transurban and City of Almost Minor Medium AQP4 (see AQR28) Almost Minor Medium and city CityLink traffic receptors from air quality Melbourne traffic management. Certain Certain connections operations changes associated with operation and maintenance, based on traffic volume projections. AQR35 Port, CityLink Port, city and Underestimation of traffic R Initial AQP1, AQP2, AQP3 and AQP4 Possible Minor Low AQP1 (see AQR29) Possible Minor Low and city CityLink traffic volumes resulting in higher Air quality modelling sensitivity analysis. AQP2 (see AQR30) connections operations than anticipated ambient VicRoads, Transurban and City of Melbourne AQP3 (see AQR29) air quality impacts on traffic management. sensitive receptors. AQP4 (see AQR28) Business Construction Risks BR1 West Gate Site clearance and Changes to access from P Initial BP2. Access and amenity for business Likely Minor Medium BP2 - Access and amenity for business and commercial facilities Possible Minor Medium Freeway construction site diminished transport due to and commercial facilities Access to and amenity for potentially affected business and commercial facilities establishment site clearance and Access to and amenity for potentially affected must be protected, where practicable, by responding to the Project urban design construction activities, business and commercial facilities will be principles and vision and implementing the principles of Crime Prevention Through resulting in disruption to protected and, where practicable, improved by Environmental Design. businesses and reduced responding to the Urban Design Framework and Any reduction in the level of access, amenity or function of any business or safety. implementing the principles of Crime Prevention commercial facility must be minimised to the duration necessary to carry out the Through Environmental Design. relevant construction related works. Initial BP4. Impacts on operation of All permanent access to business and commercial facilities affected by the works is community, private recreation and to be restored, or relocated as agreed with the relevant property owner, including council facilities associated landscaping and restoration works, and temporary access Where the operation of community, private arrangements put in place for the duration of construction must be removed when recreation and council facilities is directly construction has ceased. impacted by the Project, mitigation and BP4 - Impacts on operation of community, private recreation and management measures will be agreed with the council facilities appropriate stakeholders to minimise these impacts. Where the operation of community, private recreation and council facilities is directly impacted by the Project, mitigation and management measures must be Initial BP5. Business Involvement Plan implemented in consultation with the appropriate stakeholders to minimise these Develop and implement a Business Involvement impacts to the extent practicable. Plan in consultation with affected local Councils to BP5 - Business Involvement Plan engage and consult potentially affected stakeholders and discuss progress of construction As part of the Communications and Community Engagement Plan (see EPR SP2), activities, including significant milestones, develop and implement a Business Involvement Plan, in consultation with affected potential impacts, mitigation measures, changed local Councils and other affected stakeholders, in advance of works (other than traffic conditions and other matters which are of preparatory works as referred to in the Incorporated Document) commencing. interest or concern to them. The plan will also Councils and affected stakeholders are to be consulted on progress of construction include but not be limited to: activities, including significant milestones, potential impacts, mitigation measures, changed traffic conditions and other matters which are of interest or concern to x Identification of relevant stakeholders them. The plan must also include but not be limited to: x Procedures to disseminate information x Identification of relevant stakeholders regarding construction progress and environmental management measures x Procedures to disseminate information regarding construction progress and environmental management measures x Procedures through which the community can provide comment or feedback in relation x Procedures through which the community can provide comment or feedback to environmental management measures and in relation to environmental management or delivery of the Project delivery of the Project x Procedures that would be implemented to resolve any issues or disputes that x Procedures that would be implemented to may arise between parties relating to the environmental management or resolve any issues or disputes that may arise delivery of the Project. between parties relating to the environmental TP3 (see TR1) management or delivery of the Project. Initial TP4 (see TR5)
12 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R BR2 West Gate Site clearance and Business viability affected P Initial BP1. Damage or impacts on third party Likely Minor Medium BP1 - Damage or impacts on third party property and infrastructure Possible Minor Medium Freeway construction site by partial acquisition property and infrastructure Through detailed design and construction, design and construct the works to establishment and/or loss of functionality. Design and construct the Works to minimise minimise, to the extent practicable, impacts to, and interference with, third party impacts to, and interference with, third party property and infrastructure and to ensure that infrastructure and property is property and infrastructure and to ensure that protected during construction and operation. Any damage caused to property as a infrastructure and property is protected during result of the Project must be appropriately remedied. construction and operation. Any damage ca`used BP5 (see BR1) to property as a result of the Project must be BP8 - Business disruption rectified or the landowner compensated. Minimise disruption to businesses to the extent practicable from temporary occupation of land. BR3 West Gate Site clearance and Business viability affected P Initial BP1 (see BR2) Likely Minor Medium BP1 (see BR2) Possible Minor Medium Freeway construction site by displacement and/or BP5 (see BR1) establishment loss of continuity. BP9 - Business acquisition process Minimise disruption to businesses to the extent practicable from the acquisition of interests in land, and work with business and land owners to endeavour to reach agreement on the terms for possession of the land. BR4 West Gate Relocation of Business viability affected P Initial BP6. Utility assets Likely Moderate Medium BP1 (see BR2) Likely Minor Medium Freeway 220kV power lines by partial acquisition Minimise impacts on utility assets, including but BP5 (see BR1) and towers, and/or loss of functionality not limited to: BP6 - Utility assets protection of other utilities located x Stormwater and sewer assets Through detailed design and construction, minimise impacts on utility assets, to the along business x Electricity transmissions assets (overhead extent practicable, including but not limited to: property, carried and underground lines) x Stormwater and sewer assets out in a way that x Gas and fuel pipelines maintains full utility x Electricity transmissions assets (overhead and underground lines) x Communications lines service x Gas and fuel pipelines connections (e.g. fibre optic cables) Protect and where required, modify utility assets x Communications lines (e.g. fibre optic cables). to the satisfaction of asset owners. To the extent relocations are required to facilitate the Project, protect and where Initial BP7. Gas utilities required, modify utility assets to the satisfaction of asset owners. Unless agreed otherwise with the asset owner, BP8 (see BR2) ensure that: x No works are undertaken within 3.0 metres of any licensed transmission gas pipeline or underground regulating station x Subject to the requirement below, clearances to all gas assets are as per the Conditions of Works as detailed in SP AusNet Technical Standards TS2607.1, TS2607.2 and TS2607.3, as amended or replaced from time to time x Risk assessments and safety studies detailing the impact on gas network infrastructure are completed in accordance with AS2885, which is the Standards Australia standard for the design, construction, testing, operations and maintenance of gas and petroleum pipelines that operate at pressure in excess of 1050 kPa, as amended or replaced from time to time. BR5 West Gate Relocation of Business viability affected R Initial BP6 (see BR4) Possible Minor Medium BP1 (see BR2) Unlikely Minor Low Freeway 220kV power lines by displacement and/or BP5 (see BR1) and towers, loss of continuity. BP9 (see BR3) protection of other utilities located along business property, carried out in a way that maintains full utility service connections
West Gate Tunnel Project | Environment Effects Statement 13 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R BR6 West Gate Construction of Changes to access from P Initial BP5 (see BR1) Likely Moderate High BP2 (see BR1) Likely Minor Medium Freeway surface roads and diminished transport due to Initial BP2 (see BR1) BP4 (see BR1) other civil site clearance and Initial BP4 (see BR1) BP5 (see BR1) infrastructure construction activities, works, carried out resulting in disruption to TP3 (see TR1) in a way that businesses and reduced maintains full utility safety. service connections BR7 West Gate Construction of Business viability affected R Initial BP2 (see BR1) Possible Moderate Medium BP2 (see BR1) Possible Minor Medium Freeway surface roads and by diminished customer Initial BP3 - Screening BP3 - Screening other civil experience, human health, Screening will be erected at the boundary of Screening must be erected at the boundary of construction sites that adjoin infrastructure safety and/or amenity construction sites that adjoin residential or residential or commercial properties, consistent with the surrounding context, in works, carried out (including noise, dust, commercial properties, consistent with the consultation with affected property owners and occupiers. in a way that vibration) surrounding context, in consultation with affected BP4 (see BR1) maintains full utility property owners and occupiers. service BP5 (see BR1) Initial BP4 (see BR1) connections AQP6 (see AQR01) BR8 Tunnels Site clearance and Changes to access from P Initial BP2 (see BR1) Likely Minor Medium BP2 (see BR1) Possible Minor Medium construction site diminished transport due to Initial BP3 (see BR7) BP4 (see BR1) establishment site clearance and Initial BP4 (see BR1) BP5 (see BR1) construction activities, resulting in disruption to Initial TP4 (see TR5) TP3 (see TR1) businesses and reduced safety. BR9 Tunnels Tunnelling Changes to access from P Initial BP5 (see BR1) Almost Minor Medium BP2 (see BR1) Likely Minor Medium activities, carried diminished transport due to Initial TP4 (see TR5) certain BP4 (see BR1) out in a way that site clearance and BP5 (see BR1) maintains full utility construction activities, service resulting in disruption to TP3 (see TR1) connections businesses and reduced safety. BR10 Tunnels Tunnelling Business viability affected Initial BP2 (see BR1) Likely Moderate High BP2 (see BR1) Likely Minor Medium activities, carried by diminished customer Initial BP3 (see BR7) BP3 (see BR7) out in a way that experience, human health, Initial BP4 (see BR1) BP4 (see BR1) maintains full utility safety and/or amenity service (including noise, dust, Initial BP5 (see BR1) BP5 (see BR1) connections vibration). BP6 (see BR4) AQP6 (see AQR01) BR11 Port, City Site clearance and Changes to access from P Initial BP1 (see BR2) Likely Moderate High BP2 (see BR1) Likely Minor Medium Link and city construction site diminished transport and Initial BP2 (see BR1) BP3 (see BR7) connections establishment reduction to amenity Initial BP3 (see BR7) BP4 (see BR1) (including noise, dust, vibration and visual Initial BP5 (see BR1) BP5 (see BR1) amenity) due to site Initial TP4 (see TR5) TP3 (see TR1) clearance and construction AQP6 (see AQR01) activities, resulting in disruption to businesses and reduced safety. BR12 Port, City Site clearance and Business viability affected P Initial BP1 (see BR2) Likely Moderate High BP1 (see BR2) Possible Minor Medium Link and city construction site by partial acquisition Initial BP5 (see BR1) BP5 (see BR1) connections establishment and/or loss of functionality. BP8 (see BR2) BR13 Port, City Site clearance and Business viability affected P Initial BP1 (see BR2) Likely Moderate High BP1 (see BR2) Possible Moderate Medium Link and city construction site by displacement and/or Initial BP5 (see BR1) BP5 (see BR1) connections establishment loss of continuity. BP9 (see BR3) BR14 Port, City Construction of the Changes to access from P Initial BP1 (see BR2) Likely Moderate High BP2 (see BR1) Likely Minor Medium Link and city viaduct and the diminished transport and Initial BP2 (see BR1) BP3 (see BR7) connections shared user path reduction to amenity Initial BP3 (see BR7) BP4 (see BR1) and associated civil (including noise, dust, infrastructure vibration and visual Initial BP5 (see BR1) BP5 (see BR1) works, carried out amenity) due to site Initial TP4 (see TR5) TP3 (see TR1) in a way that clearance and construction AQP6 (see AQR01) maintains full utility activities, resulting in service disruption to businesses connections and reduced safety.
14 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R BR15 Port, City Construction of the Changes to access from P Initial BP1 (see BR2) Likely Moderate High BP2 (see BR1) Likely Minor Medium Link and city new city and port diminished transport and Initial BP2 (see BR1) BP3 (see BR7) connections connections and reduction to amenity Initial BP3 (see BR7) BP4 (see BR1) associated civil (including noise, dust, infrastructure works vibration and visual Initial BP5 (see BR1) BP5 (see BR1) amenity) due to site Initial TP4 (see TR5) TP3 (see TR1) clearance and construction AQP6 (see AQR01) activities, resulting in disruption to businesses and reduced safety. Operation Risks BR16 West Gate Mix of businesses Changes to access during P Initial TP1 (see TR28) Possible Minor Medium BP2 (see BR1) Unlikely Minor Low Freeway abutting the project operation and maintenance TP1 (see TR28) or in area near resulting in disruption to construction businesses. activity. Refer to Section 6.4 of Business Impact Assessment report. BR17 West Gate Mix of businesses Business viability affected R Initial BP2 (see BR1) Possible Minor Medium BP2 (see BR1) Possible Minor Medium Freeway abutting the project by diminished customer Initial BP4 (see BR1) BP4 (see BR1) or in area near experience and/or reduced construction amenity. activity. Refer to Section 6.4 of Business Impact Assessment report. BR18 West Gate Mix of businesses Business viability affected R Initial BP4 (see BR1) Likely Moderate Medium BP5 (see BR1) Possible Moderate Medium Freeway abutting the project by tolls. or in area near construction activity. Refer to Section 6.4 of Business Impact Assessment report. BR19 Tunnels Tunnels operations Changes to access during P Initial BP2 (see BR1) Likely Moderate High BP2 (see BR1) Possible Minor Medium operation and maintenance TP1 (see TR28) resulting in disruption to businesses, including effects of loss of passing trade. BR20 Tunnels Tunnels operations Business viability affected R Initial BP4 (see BR1) Likely Moderate High BP2 (see BR1) Possible Minor Medium by diminished customer BP4 (see BR1) experience, and/or reduced amenity. BR21 Tunnels Tunnels operations Business viability affected R Initial BP4 (see BR1) Likely Moderate Medium BP5 (see BR1) Possible Moderate Medium by tolls. BR22 Port, CityLink Port, CityLink and Changes to access during R Initial BP2 (see BR1) Possible Minor Medium BP2 (see BR1) Unlikely Minor Low and city city connections operation and maintenance Initial TP4 (see TR5) TP1 (see TR28) connections operations resulting in disruption to businesses. BR23 Port, CityLink Port, CityLink and Business viability affected R Initial BP2 (see BR1) Likely Moderate High BP2 (see BR1) Likely Minor Medium and city city connections by diminished customer Initial TP4 (see TR5) BP4 (see BR1) connections operations experience, and/or reduced amenity. BR24 Port, CityLink Port, CityLink and Business viability affected R Initial BP4 (see BR1) Likely Moderate Medium BP5 (see BR1) Possible Moderate Medium and city city connections by tolls. connections operations Contaminated Soil and Spoil Management Construction Risks CSR1 West Gate Site clearance and Excavation, stockpiling, R Initial CSP1. Develop and implement processes Rare Minor Low CSP1 - Contaminated Soil Requirements Rare Minor Low Freeway construction site transport and disposal of and measures to manage contaminated soil, that The CEMP must include processes and measures to manage contaminated soil establishment contaminated spoil and must include compliance with: that comply with relevant standards, guidelines, statutory requirements and best acid sulphate soil and rock; x The Environment Protection (Industrial practice including but not limited to: leading to potential risks to
West Gate Tunnel Project | Environment Effects Statement 15 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R public health and the Waste Resource) Regulations 2009 x SEPP – Prevention and Management of Contaminated Land, 2002 environment x Industrial Waste Management Policy (Waste x Environment Protection (Industrial Waste Resource) Regulations 2009 Acid Sulphate Soils) 1999 x Industrial Waste Management Policy (Waste Acid Sulphate Soils) 1999 x National Environment Protection (Assessment of Site Contamination) x National Environment Protection (Assessment of Site Contamination) Measures 2013 Measures 2013 x Environment Protection (Schedule Premises x Environment Protection (Schedule Premises and Exemptions) Regulations and Exemptions) Regulations 2007 2007 x WorkSafe Occupational Health and Safety x WorkSafe Occupational Health and Safety Regulations 2007 (Asbestos) Regulations 2007 (Asbestos) x Relevant Industrial Waste Resource Guidelines. x Relevant Industrial Waste CSP2 - Contaminated soil and spoil management Resource Guidelines. The CEMP must include requirements and methods for contaminated soil and spoil Initial CSP2. Prepare and implement a management developed in consultation with EPA Victoria. Contamination and Spoil Management Plan in consultation with EPA Victoria, which includes but This must include undertaking a detailed assessment prior to any excavation of is not limited to the following: potentially contaminated areas to identify location, types and extent of any contaminated land and properties within or adjacent to the Project boundary, and x Undertaking a detailed assessment prior to sensitive land uses affected by construction activity outside the Project boundary, any excavation of potentially contaminated and assessing the potential impact for human health, environmental risk and odour. areas to identify location, types and extent of any contaminated land and properties within This assessment must include but not be limited to consideration of the following: or adjacent to the project boundary, and x Potential contamination risks at the former quarry locations and landfills areas affected by construction activity outside the project boundary, and assessing x Potential contamination risks associated with any alteration of the 220kV the potential impact for human health, power lines and any other utilities environmental risk and odour x Potential contamination risks associated with any works to the North Yarra x Characterising soil prior to disposal or reuse Main Sewer x Identifying soil containing asbestos and if x Potential contamination risks and waste classification of the sediments in the present, developing management strategies Maribyrnong River and Moonee Ponds Creek in accordance with the WorkSafe x Potential impacts posed by contamination sources adjacent to the northern Regulations portal area x Assessing geologic formations with naturally x Presence of soil contamination where excavations are proposed in the South enriched metals and applicable spoil Dynon rail yards management options and or off-site disposal to the satisfaction of EPA Victoria x Potential contamination risks in locations where public open spaces are proposed. x Identifying suitably licensed facilities for the disposal of contaminated soil CEMP must also include requirements and methods for: x Management of dust and potential x Characterising soil prior to disposal or reuse including PFAS chemicals stormwater run-off from stockpiled materials x Identifying soil containing asbestos and if present, developing management x Assessing potential for accumulation of strategies in accordance with the WorkSafe Regulations potentially harmful (due to their toxic or Assessing geological formations with naturally enriched metals and applicable explosive properties) gases and vapours x spoil management options and or off-site disposal to the satisfaction of EPA during tunnelling from soil and groundwater Victoria, in particular, tunnel spoil and the West Gate Freeway embankment contamination zones material x Undertaking a baseline comprehensive site assessment of area proposed for x Identifying suitably licensed facilities for the disposal or treatment of construction laydown prior to use contaminated soil x Where air pollutants are released as a result x Management of wastewater of disturbance of contaminated land, air x Management of dust, potential stormwater run-off and seepage from pollutants must be managed in accordance stockpiled materials with requirements of SEPP (AQM) x Assessing potential for accumulation of potentially harmful gases and vapours x Minimising cut and cover construction during tunnelling from soil and groundwater contamination zones techniques in areas containing asbestos contamination x Undertaking a baseline site assessment of areas proposed for construction laydown prior to use x Protect the beneficial uses of land associated with current and planned future use. x Management of any air pollutants released as a result of disturbance of contaminated land, in accordance with requirements of SEPP (AQM) x Minimising cut and cover construction techniques in areas containing asbestos contamination x Protection of the beneficial uses of land associated with current and planned future use.
16 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Initial CSP3. Develop and implement measures CSP3 - Acid sulphate soil for the management of waste acid sulphate soil The CEMP must include requirements and methods for the management of waste material in accordance with EPA Victoria acid sulphate soil material in accordance with EPA Victoria publication IWRG 2009, publication IWRG 2009, EPA Publication 655.1 EPA Victoria Publication 655.1 Acid Sulfate Soil and Rock 2009, Victorian Best Acid Sulfate Soil and Rock 2009, Victorian Best Practice Guidelines for Assessing and Managing Coastal Acid Sulfate Soil. Practice Guidelines for Assessing and Managing Coastal Acid Sulfate Soil. This will include This will include undertaking an acid sulphate soils risk identification process in undertaking an acid sulphate soils risk accordance with the Victorian Coastal Acid Sulphate Soil Strategy, if soil and rock identification process in accordance with the within the Project boundary are suspected to be acid sulphate soil and rock. Victorian Coastal Acid Sulphate Soil Strategy, if CSP4 - Odour management soil and rock within the project boundary are The CEMP must include requirements and methods for odour management during suspected to be acid sulphate soil and rock. the excavation, stockpiling and transportation of contaminated material. Initial CSP4. Develop and implement measures for odour management during the excavation, stockpiling and transportation of contaminated material. CSR2 West Gate Earthworks Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Rare Minor Low Freeway transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) contaminated spoil and Initial CSP3 (see CSR1) CSP3 (see CSR1) acid sulphate soil and rock, leading to potential risks to Initial CSP4 (see CSR1) CSP4 (see CSR1) public health and the environment CSR3 West Gate Earthworks Potential impacts posed by R Initial SWP6 (see SWR13) Possible Moderate Medium SWP6 (see SWR13) Possible Moderate Medium Freeway loss of containment of chemicals that are stored and used on-site, such as fuels, leading to potential risks to public health and the environment CSR4 West Gate Relocation of 220kV Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Rare Minor Low Freeway power lines and transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) towers, protection of contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) other utilities that (including ground gases may be impacted and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment CSR5 Tunnels Site clearance and Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Minor Low CSP1 (see CSR1) Unlikely Minor Low construction site transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) establishment contaminated spoil and Initial CSP3 (see CSR1) CSP3 (see CSR1) acid sulphate soil and rock, leading to potential risks to Initial CSP4 (see CSR1) CSP4 (see CSR1) public health and the environment CSR6 Tunnels Earthworks Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Moderate Medium transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) contaminated spoil and Initial CSP3 (see CSR1) CSP3 (see CSR1) acid sulphate soil and rock, leading to potential risks to Initial CSP4 (see CSR1) CSP4 (see CSR1) public health and the environment CSR7 Tunnels Earthworks Potential impacts posed by R Initial SWP6 (see SWR13) Possible Moderate Medium SWP6 (see SWR13) Possible Moderate Medium loss of containment of chemicals that are stored and used on-site, such as fuels, leading to potential risks to public health and the environment CSR8 Tunnels North Yarra Main Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Moderate Medium Sewer realignment transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) and protection of contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) other utilities (including ground gases and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment
West Gate Tunnel Project | Environment Effects Statement 17 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R CSR9 Tunnels Dive structure / Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Moderate Medium portal construction transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) (including ground gases and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment CSR10 Tunnels Tunnelling activities Excavation, stockpiling, R Initial CSP1 (see CSR1) Rare Moderate Low CSP1 (see CSR1) Rare Moderate Low transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) (including ground gases and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment CSR11 Port, Site clearance and Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Minor Low CSP1 (see CSR1) Unlikely Minor Low CityLink and construction site transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) city establishment contaminated spoil and Initial CSP3 (see CSR1) CSP3 (see CSR1) connections acid sulphate soil and rock, leading to potential risks to Initial CSP4 (see CSR1) CSP4 (see CSR1) public health and the environment CSR12 Port, Earthworks Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Minor Low CityLink and transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) city contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) connections (including ground gases and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment. CSR13 Port, Earthworks Potential impacts posed by R Initial SWP6 (see SWR13) Possible Moderate Medium SWP6 (see SWR13) Possible Moderate Medium CityLink and loss of containment of city chemicals that are stored connections and used on-site, such as fuels, leading to potential risks to public health and the environment. CSR14 Port, Construction of Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Minor Low CityLink and bridges over the transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) city Maribyrnong River, contaminated spoil derived Initial CSP3 (see CSR1) CSP3 (see CSR1) connections Moonee Ponds from the sediments of the Creek and Maribyrnong River and Initial CSP4 (see CSR1) CSP4 (see CSR1) associated civil acid sulphate soil, leading infrastructure works to potential risks to public health and the environment. CSR15 Port, Construction of the Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Minor Low CityLink and twin viaducts and transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) city the shared user path contaminated spoil Initial CSP3 (see CSR1) CSP3 (see CSR1) connections and associated civil (including ground gases infrastructure works and asbestos containing Initial CSP4 (see CSR1) CSP4 (see CSR1) materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment.
18 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R CSR16 Port, Construction of the Excavation, stockpiling, R Initial CSP1 (see CSR1) Unlikely Moderate Medium CSP1 (see CSR1) Unlikely Minor Low CityLink and new city connections transport and disposal of Initial CSP2 (see CSR1) CSP2 (see CSR1) city and associated civil contaminated spoil from Initial CSP3 (see CSR1) CSP3 (see CSR1) connections infrastructure works VicTrack land (including ground gases and Initial CSP4 (see CSR1) CSP4 (see CSR1) asbestos containing materials) and acid sulphate soil and rock, leading to potential risks to public health and the environment Operation Risks Not applicable for Contaminated Soil and Spoil Management Ecology Construction Risks ER01 West Gate Site clearance and Loss or degradation of P Initial EP1 Almost Minor Medium EP1 - Minimise vegetation removal and disturbance Almost Minor Medium Freeway construction site remnant vegetation lining x Develop and implement measures to avoid, certain Develop and implement measures to avoid, where practicable, and otherwise certain establishment Kororoit Creek and Stony where practicable, and otherwise minimise minimise to the extent practicable impacts on native vegetation and fauna habitat Creek/Stony Creek impacts on native vegetation and fauna through detailed design and construction, including: backwash during site habitat through detailed design and clearance. x Minimising footprint and surface disturbance of temporary and permanent construction, including: works and constrain works on or near the north side of the West Gate x Minimising footprint and surface disturbance Freeway and Kororoit Creek intersection, Hyde Street Reserve, Yarraville of temporary and permanent Works and Gardens, Stony Creek and Stony Creek Reserve, Maribyrnong River, Moonee constrain works on or near Hyde Street Ponds Creek, Kororoit Creek, Dynon Road and areas of amenity planting Reserve, Yarraville Gardens, Stony Creek including Footscray Road and Stony Creek Reserve, Maribyrnong Minimising works in or near wetlands and EVC habitats (such as the Kororoit River, Yarra River, Moonee Ponds Creek, x Creek Riparian Woodland, Stony Creek Coastal Saltmarsh, Moonee Ponds Kororoit Creek, Dynon Road and areas of Creek Brackish Wetlands and Plains Grassy Woodland and Swamp Scrub amenity planting patches along Dynon Road) x Minimising works in or near wetlands and EVC habitats (such as the Stony Creek x Minimising footprint and disturbance of potential foraging habitat for Swift Coastal Saltmarsh, Moonee Ponds Creek Parrot, Powerful Owl and Grey-headed Flying Fox Brackish Wetlands and Plains Grassy x Minimising the removal of mature trees, planted and remnant native trees and Woodland and Swamp Scrub patches along remnant vegetation, particularly large amenity trees (>30 cm DBH) and those Dynon Road) within or connected to public reserves and parks x Arboricultural assessments to inform detailed design and maximise tree retention and long-term viability of amenity plantings. A pre-construction site assessment must be carried out to confirm the area and number of trees proposed to be impacted. Area and number of trees actually removed is to be confirmed through a post-construction assessment. EP2 - Vegetation protection measures The CEMP must include requirements and methods for: x Fencing protected areas and no go zones to prevent access during construction. Fencing should be to a standard agreed with the relevant land manager x Pre-construction site assessment to confirm that vegetation and trees to be retained have been adequately protected from impact x Vegetation clearing controls and protection measures x Development and implementation of a Tree Management Plan for protection of retained trees based on the recommendations of Australian Standard 4970- 2009 Protection of Trees on Development Sites Implementation of appropriate measures to manage the risk of the spread and introduction of weeds and pathogens during construction. EP7 - Vegetation Offsets Native vegetation offsets must be provided in accordance with the Permitted Clearing of Native Vegetation - Biodiversity Assessment Guidelines (Department of Environment and Primary Industries, September 2013), except as otherwise agreed by the Secretary to the Department of Environment, Land Water and Planning.
West Gate Tunnel Project | Environment Effects Statement 19 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER03 West Gate Site clearance and Loss or damage of planted P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Insignificant Medium Freeway construction site vegetation, including non- certain EP2 (see ER01) certain establishment indigenous native and EP3 - Reinstatement exotic species. Areas affected by temporary works must be reinstated and appropriate vegetation selected for planting to tolerate the microclimate conditions including under new road structures, such as the elevated structure over Footscray Road, in consultation with the relevant council and the land manager. EP6 - Landscaping Plan Prepare and implement the Landscaping Plan that includes replacement of affected planted vegetation to achieve a canopy of equal (or greater) size of healthy, mature examples of the species. The plan must ensure the reinstatement of soils is of sufficient quality and volumes to support the long-term viability of replacement plantings. The plan must achieve a minimum tree replacement ratio of 3:1. The plan must be developed in consultation with the relevant council with regard to local policies and strategies including, as applicable: x Greening the West Strategic Plan x City of Maribyrnong Street Planting Strategy x City of Melbourne Draft Urban Ecology and Biodiversity Strategy x City of Melbourne’s Tree Retention and Removal policy and Urban Forest Strategy x The relevant City of Melbourne Urban Forest Precinct Plan. The re-establishment of trees must also consider the contribution that the replacement trees can make to the creation of habitat corridors and linkages where practicable. ER04 West Gate Site clearance and Loss or damage of planted P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Insignificant Medium Freeway construction site vegetation, including non- Initial EP2 certain EP2 (see ER01) certain establishment indigenous native and The Construction Environmental Management EP4 - Fauna management measures exotic species that provide Plan is to indicate ‘no go’ zones and provide detail habitat for common The CEMP must include requirements and methods for: of the measures to be implemented to ensure arboreal fauna species. protection of listed flora and fauna x Undertaking pre-clearing surveys and inspections to confirm the on-site location of native fauna species x Relocating native fauna from pre-clearance survey areas as appropriate x Preparation of a translocation strategy for relocation of any significant fauna species including, where non-listed species are encountered; any individuals will be encouraged to leave the vegetation; and where nests are encountered, they will be relocated to a similar tree / habitat in close proximity x Reporting and actions to follow for management and offsetting purposes x The surveys and inspections to must be undertaken under the guidance of a suitably qualified ecologist, as well as any subsequent management or offset measures if required x Minimise lighting impacts in known fauna habitats x Incidental or unanticipated threatened flora and fauna finds to be reported immediately and any clearing works in the vicinity must be stopped until an evaluation of an appropriate response can be established. ER05 West Gate Site clearance and Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low Freeway construction site sediments, waste and SWP7 (see SWR1) establishment chemicals from construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER06 West Gate Site clearance and Construction-related noise R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low Freeway construction site and/or artificial lighting may NVP4 (see NVR01) establishment affect behaviour of fauna species.
20 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER07 West Gate Earthworks Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low Freeway sediments, waste and SWP7 (see SWR1) chemicals from construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER08 West Gate Earthworks Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Unlikely Minor Low Freeway artificial light and/or NVP4 (see NVR01) vibration (from drilling, blasting) may affect behaviour of fauna species. ER09 West Gate Construction of Inputs of surface R Rare Moderate Low EP2 (see ER01) Rare Moderate Low Freeway surface roads and sediments, waste and SWP6 (see SWR13) other civil chemicals from SWP7 (see SWR1) infrastructure works construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER10 West Gate Construction of Construction-related noise R Initial EP2 (see ER04) Possible Minor Medium EP2 (see ER01) Possible Minor Medium Freeway surface roads and and/or artificial light may LVP3 (see LVR1) other civil affect behaviour of fauna NVP4 (see NVR01) infrastructure works species. ER11 West Gate Site clearance and Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low Freeway construction site sediments, waste and SWP7 (see SWR1) establishment chemicals from construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect aquatic flora, fauna or habitat. ER12 West Gate Site clearance and Construction-related noise R Possible Minor Medium LVP3 (see LVR1) Unlikely Minor Low Freeway construction site and/or artificial lighting may NVP4 (see NVR01) establishment affect behaviour of aquatic fauna species. ER13 West Gate Earthworks Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low Freeway sediments, waste and SWP7 (see SWR1) chemicals from construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect aquatic flora, fauna or habitat. ER14 West Gate Earthworks Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium EP2 (see ER01) Unlikely Minor Low Freeway artificial light and/or LVP3 (see LVR1) vibration (from drilling, NVP4 (see NVR01) blasting) may affect behaviour of aquatic fauna species.
West Gate Tunnel Project | Environment Effects Statement 21 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER15 West Gate Construction of Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low Freeway surface roads and sediments, waste and SWP7 (see SWR1) other civil chemicals from infrastructure works construction into on the waters of Kororoit Creek or Stony Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect aquatic flora, fauna or habitat. ER16 West Gate Construction of Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium EP2 (see ER01) Unlikely Minor Low Freeway surface roads and artificial light and/or LVP3 (see LVR1) other civil vibration (from drilling, NVP4 (see NVR01) infrastructure works blasting) may affect behaviour of aquatic fauna species. ER18 West Gate Construction of Piers are to be installed on P Initial EP4. Design, locate and construct Likely Moderate High EP4 (see ER04) Possible Minor Medium Freeway structures over the banks of Stony Creek structures to minimise impact on riparian and EP5 (see ER17) Stony Creek and and Kororoit Creek to aquatic habitat in Kororoit Creek, Stony Creek, SWP9 (see SWR29) associated civil support new road Maribyrnong River and Moonee Ponds Creek. infrastructure works structures. It is considered SWP10 (see SWR29) that structures and their SWP11 (see SWR1) construction have the potential to alter flows and water quality. Impacts to flow and water quality may impact the extent and cover of instream vegetation and change fauna movement. ER75 West Gate Site clearance and Potential impacts of R Initial EP1 (see ER01) Possible Moderate Medium EP1 (see ER01) Unlikely Moderate Medium Freeway construction site groundwater availability to GWP3 (see GWR3) establishment trees and remnant GWP4 (see GWR3) vegetation north along Stony Creek towards GWP5 (see GWR3) Francis Street and east toward the golf course due to the construction of the southern portal. ER78 West Gate Earthworks Potential impacts of R Possible Minor Medium GWP3 (see GWR3) Unlikely Minor Low Freeway groundwater availability to trees and planted vegetation north along Stony Creek towards Francis Street and east toward the golf course and surrounding the northern areas of Donald McLean Reserve due to the construction of the southern portal. ER81 West Gate Earthworks Potential spread of weeds R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low Freeway and pathogens impacting Initial EP2 (see ER04) EP2 (see ER01) the quality of native vegetation along Kororoit and Stoney Creek. ER19 Tunnels Dive structure / Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low portal construction sediments, untreated SWP7 (see SWR1) groundwater or slurry, waste and chemicals from construction into on the waters of Stony Creek and/or Maribyrnong River, either directly or via the stormwater system, in amounts sufficient to adversely affect riparian flora values.
22 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER21 Tunnels Site clearance and Loss or damage of planted P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Minor Medium construction site vegetation, including non- certain EP2 (see ER01) certain establishment indigenous native and exotic species. EP3 (see ER03) EP4 (see ER04) EP6 (see ER03) ER22 Tunnels Site clearance and Unplanned loss or damage R Initial EP1 (see ER01) Rare Minor Low EP1 (see ER01) Rare Insignificant Low construction site of planted vegetation, EP2 (see ER01) establishment including non-indigenous EP3 (see ER03) native and exotic species. EP4 (see ER04) ER23 Tunnels Dive structure / Discharge of untreated R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low portal construction groundwater or slurry, SWP7 (see SWR1) waste and chemicals into areas of surrounding planted vegetation. ER25 Tunnels Dive structure / Potential impacts of R Initial EP1 (see ER01) Possible Moderate Medium EP1 (see ER01) Rare Moderate Low portal construction groundwater availability to GWP3 (see GWR3) areas of planted vegetation, parks and gardens, in particular Yarraville Gardens. ER26 Tunnels Site clearance and Loss or damage of planted P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Insignificant Medium construction site vegetation, including Initial EP2 (see ER04) certain EP2 (see ER01) certain establishment indigenous, non- EP4 (see ER04) indigenous native trees and exotic species that may provide fauna habitat. ER27 Tunnels North Yarra Main Unplanned loss or R Initial EP1 (see ER01) Possible Minor Low EP1 (see ER01) Possible Insignificant Low Sewer realignment degradation of habitat for Initial EP2 (see ER04) EP2 (see ER01) and protection of threatened fauna species EP4 (see ER04) other utilities and/or death or injury to fauna species during vegetation clearance works. ER28 Tunnels North Yarra Main Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low Sewer realignment sediments, waste and SWP7 (see SWR1) and protection of chemicals from other utilities construction into surface waters via the stormwater system, in amounts sufficient to adversely affect fauna or habitat. ER29 Tunnels North Yarra Main Construction-related noise R Possible Minor Medium NVP4 (see NVR01) Possible Insignificant Low Sewer realignment and/or artificial light may and protection of affect behaviour of fauna other utilities species. ER30 Tunnels Site clearance and Loss or degradation of R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low construction site habitat for fauna species Initial EP2 (see ER04) EP2 (see ER01) establishment and/or death or injury to Initial EP3 EP3 (see ER03) fauna species (e.g. during vegetation clearance Undertake pre-clearing surveys and inspections EP4 (see ER04) works). for native species to confirm the on-site location of those species. Relocate native fauna from pre- clearance survey areas as appropriate. All methods would be detailed within the Construction Environmental Management Plan as well as reporting and actions to follow for management and offsetting purposes. The surveys and inspections would be undertaken under the guidance of a suitably qualified ecologist, as well as any subsequent management or offset measures if required. Incidental or unanticipated threatened flora and fauna finds would be reported immediately and any clearing works in the vicinity would be stopped until an evaluation of an appropriate response can be established (as per the methods detailed in the Construction Environmental Management Plan).
West Gate Tunnel Project | Environment Effects Statement 23 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER31 Tunnels Site clearance and Inputs of surface R Unlikely Moderate Medium SWP6 (see SWR13) Rare Moderate Low construction site sediments, waste and SWP7 (see SWR1) establishment chemicals from construction into on the waters of Stony Creek and/or Maribyrnong River, either directly or via the stormwater system, in amounts sufficient to adversely affect fauna or habitat. ER32 Tunnels Site clearance and Construction-related noise R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low construction site and/or artificial light may NVP4 (see NVR01) establishment affect behaviour of fauna species. ER33 Tunnels Dive structure / Inputs of surface R Possible Minor Medium SWP6 (see SWR13) Rare Minor Low portal construction sediments, untreated SWP7 (see SWR1) groundwater or slurry, waste and chemicals from construction into on the waters of Stony Creek and/or Maribyrnong River, either directly or via the stormwater system, in amounts sufficient to adversely affect fauna or habitat. ER34 Tunnels Dive structure / Construction-related noise R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low portal construction and/or artificial light may NVP4 (see NVR01) affect behaviour of fauna species. ER35 Tunnels Tunnelling activities Accidental discharge of R Unlikely Moderate Medium SWP6 (see SWR13) Rare Moderate Low untreated groundwater and SWP7 (see SWR1) slurry into waterways during tunnelling in amounts sufficient to adversely affect aquatic, fauna or habitat. ER36 Tunnels Tunnelling activities Noise and vibration from R Possible Minor Medium LVP3 (see LVR1) Possible Minor Medium tunnelling activities may NVP4 (see NVR01) impact fauna species. ER38 Tunnels Site clearance and Inputs of surface R Unlikely Moderate Medium SWP6 (see SWR13) Rare Moderate Low construction site sediments during SWP7 (see SWR1) establishment construction of the tunnel portals into the waters of Stony Creek and/or the Maribyrnong River, either directly or via the stormwater system. ER39 Tunnels Earthworks Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low sediments, waste and SWP7 (see SWR1) chemicals from construction into on the waters of Stony Creek and/or the Maribyrnong River, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER40 Tunnels Earthworks Construction-related noise, R Possible Minor Medium LVP3 (see LVR1) Unlikely Minor Low artificial light and/or NVP4 (see NVR01) vibration (from drilling, blasting) may affect behaviour of fauna species within the nearby waterways of Stony Creek and/or the Maribyrnong River.
24 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER41 Tunnels Construction of Inputs of surface R Possible Moderate Medium SWP6 (see SWR13) Rare Moderate Low tunnels, portals and sediments, untreated SWP7 (see SWR1) other civil groundwater or slurry, infrastructure works waste and chemicals from construction of the tunnel portals and from the operation of the tunnels into on the waters of Stony Creek and/or the Maribyrnong River, either directly or via the stormwater system. ER43 Tunnels Construction of Potential acidification and R Unlikely Moderate Medium SWP6 (see SWR13) Rare Moderate Low tunnels, portals and uncontrolled discharge of SWP7 (see SWR1) other civil groundwater in to surface GWP3 (see GWR3) infrastructure works water or stormwater systems. ER44 Tunnels Construction of Construction-related noise, R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low tunnels, portals and artificial light and/or NVP4 (see NVR01) other civil vibration (from drilling, infrastructure works blasting) may affect behaviour of aquatic fauna species. Light, noise and in particular vibration may act as a fauna barrier. ER45 Tunnels Construction of Vibration as a result of R Possible Minor Medium LVP3 (see LVR1) Possible Minor Medium tunnels, portals and tunnel construction NVP4 (see NVR01) other civil activities may affect the infrastructure works behaviour of aquatic fauna species. Specifically, vibration may impede fish passage in the direct vicinity of tunnel portals and thus limited to the Maribyrnong River and Stony Creek. ER77 Tunnels Dive structure / Potential impacts of R Possible Insignificant Low GWP3 (see GWR3) Unlikely Insignificant Low portal construction groundwater availability to GWP4 (see GWR3) areas of remnant GWP5 (see GWR3) vegetation due to northern portal works. ER46 Port, CityLink Site clearance and Loss or degradation of P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Minor Medium and city construction site remnant vegetation lining Initial EP2 (see ER04) certain EP2 (see ER01) certain connections establishment Moonee Ponds Creek to EP7 (see ER01) allow for the construction of the elevated structures required to facilitate access to CityLink, Dynon Road, and Footscray Road. ER80 Port, CityLink Earthworks Potential spread of weeds R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low and city and pathogens impacting Initial EP2 (see ER04) EP2 (see ER01) connections the quality of native vegetation along Moonee Ponds Creek. ER48 Port, CityLink Site clearance and Loss or damage of planted P Initial EP1 (see ER01) Almost Moderate High EP1 (see ER01) Almost Insignificant Medium and city construction site vegetation, including non- Initial EP2 (see ER04) certain EP2 (see ER01) certain connections establishment indigenous native and EP3 (see ER03) exotic species. EP6 (see ER03) ER50 Port, CityLink Site clearance and Loss or damage of P Initial EP1 (see ER01) Almost Minor Medium EP1 (see ER01) Almost Insignificant Medium and city construction site vegetation, including Initial EP2 (see ER04) certain EP2 (see ER01) certain connections establishment indigenous, non- Initial EP3 (see ER30) EP4 (see ER04) indigenous native trees and exotic species that may provide fauna habitat. ER51 Port, CityLink Site clearance and Construction-related noise R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city construction site and/or artificial light may NVP4 (see NVR01) connections establishment affect behaviour of fauna species.
West Gate Tunnel Project | Environment Effects Statement 25 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER52 Port, CityLink Earthworks Inputs of surface R Possible Moderate Medium EP5 (see ER17) Rare Moderate Low and city sediments, waste and SWP6 (see SWR13) connections chemicals from SWP7 (see SWR1) construction into on the waters of the Maribyrnong River or Moonee Ponds Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER53 Port, CityLink Earthworks Artificial light and/or R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city vibration from construction NVP4 (see NVR01) connections activities (e.g. drilling, blasting) may affect behaviour of fauna species. ER54 Port, CityLink Construction of Inputs of surface R Possible Moderate Medium EP5 (see ER17) Rare Moderate Low and city bridge over the sediments, waste and SWP5 (see SWR41) connections Maribyrnong River chemicals from SWP6 (see SWR13) and associated civil construction into on the infrastructure works waters of the Maribyrnong SWP7 (see SWR1) River, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER55 Port, CityLink Construction of Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city bridge over the vibration and/or light may NVP4 (see NVR01) connections Maribyrnong River affect behaviour of fauna and associated civil species. infrastructure works
ER56 Port, CityLink Construction of the Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city twin viaducts and vibration and/or light may NVP4 (see NVR01) connections the shared user affect behaviour of fauna path and species. associated civil infrastructure works ER57 Port, CityLink Construction of the Inputs of surface R Possible Minor Medium EP5 (see ER17) Rare Minor Low and city twin viaducts and sediments, waste and SWP5 (see SWR41) connections the shared user chemicals from SWP6 (see SWR13) path and construction into on the associated civil waters of the Maribyrnong SWP7 (see SWR1) infrastructure works River, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER58 Port, CityLink Construction of the Inputs of surface R Possible Moderate Medium EP5 (see ER17) Rare Moderate Low and city new city sediments, waste and SWP5 (see SWR41) connections connections and chemicals from SWP6 (see SWR13) associated civil construction into on the infrastructure works waters of Moonee Ponds SWP7 (see SWR1) Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER59 Port, CityLink Construction of the Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Minor Medium and city new city vibration and/or light may NVP4 (see NVR01) connections connections and affect behaviour of fauna associated civil species. infrastructure works
26 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER61 Port, CityLink Construction of Several piers are to be P Likely Moderate High SWP9 (see SWR29) Unlikely Minor Low and city bridge over the installed within the SWP10 (see SWR29) connections Maribyrnong River waterway of the SWP11 (see SWR1) and associated civil Maribyrnong River to infrastructure works support new road structures. It is considered that structures and their construction have the potential to alter flows and hydrology. Impacts to flow and hydrology may impact the extent and cover of instream vegetation and change fauna movement. ER62 Port, CityLink Site clearance and Construction related noise R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city construction site and/ or artificial light may NVP4 (see NVR01) connections establishment affect behaviour of fauna species. ER63 Port, CityLink Earthworks Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low and city sediments, water and SWP7 (see SWR1) connections chemicals from construction into on the waters of the Maribyrnong River or Moonee Ponds Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect aquatic flora, fauna or habitat ER64 Port, CityLink Earthworks Artificial light and/or R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city vibration from construction NVP4 (see NVR01) connections activities (e.g. drilling, blasting) may affect behaviour of fauna species ER65 Port, CityLink Construction of Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low and city bridge over the sediments, waste and SWP7 (see SWR1) connections Maribyrnong River chemicals from and associated civil construction into on the infrastructure works waters of the Maribyrnong River, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER66 Port, CityLink Construction of Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city bridge over the vibration and/or light may NVP4 (see NVR01) connections Maribyrnong River affect behaviour of fauna and associated civil species. infrastructure works ER67 Port, CityLink Construction of the Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city twin viaducts and vibration and/or light may NVP4 (see NVR01) connections the shared user affect behaviour of fauna path and species. associated civil infrastructure works ER68 Port, CityLink Construction of the Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low and city twin viaducts and sediments, waste and SWP7 (see SWR1) connections the shared user chemicals from path and construction into on the associated civil waters of the Maribyrnong infrastructure works River, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat.
West Gate Tunnel Project | Environment Effects Statement 27 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER69 Port, CityLink Construction of the Inputs of surface R Rare Moderate Low SWP6 (see SWR13) Rare Moderate Low and city new city sediments, waste and SWP7 (see SWR1) connections connections and chemicals from associated civil construction into on the infrastructure works waters of Moonee Ponds Creek, either directly or via the stormwater system, in amounts sufficient to adversely affect flora, fauna or habitat. ER70 Port, CityLink Construction of the Construction-related noise, R Initial EP2 (see ER04) Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city new city vibration and/or light may NVP4 (see NVR01) connections connections and affect behaviour of fauna associated civil species. infrastructure works ER82 Port, CityLink Construction of the Potential for bank widening P Initial EP4 (see ER18) Likely Moderate High EP5 (see ER17) Unlikely Minor Low and city new city along Moonee Ponds SWP9 (see SWR29) connections connections and Creek to support new road SWP10 (see SWR29) associated civil structures. It is considered infrastructure works that structures and their SWP11 (see SWR1) construction have the potential to alter flows and hydrology. Impacts to flow and hydrology may impact the extent and cover of instream vegetation and change fauna movement. ER85 Port, CityLink Construction of the Several piers are to be Initial EP4 (see ER18) Likely Moderate High EP5 (see ER17 Almost Minor Medium and city new city installed within the SWP9 (see SWR29) certain connections connections and waterway of Moonee SWP10 (see SWR29) associated civil Ponds Creek to support infrastructure works new road and shared user SWP11 (see SWR1) path structures. It is considered that structures and their construction have the potential to alter flows and hydrology. Impacts to flow and hydrology may impact the extent and cover of instream vegetation and change fauna movement. ER88 Port, CityLink Construction of the Potential acidification and Unlikely Moderate Medium SWP6 (see SWR13) Rare Moderate Low and city new city uncontrolled discharge of SWP7 (see SWR1) connections connections and groundwater in to surface GWP3 (see GWR3) associated civil water or stormwater infrastructure works systems. Operation Risks ER02 West Gate West Gate Loss or degradation of R Initial EP1 (see ER01) Likely Minor Medium EP1 (see ER01) Likely Insignificant Low Freeway Freeway coastal saltmarsh lining EP7 (see ER01) operations Stony Creek due to shade from overhead road structures. ER72 West Gate West Gate Loss or damage of planted R Initial EP1 (see ER01) Almost Insignificant Medium EP1 (see ER01) Possible Insignificant Low Freeway Freeway vegetation, including non- certain operations indigenous native and exotic species due to the effects of shading from elevated structures. ER73 West Gate West Gate Increase in artificial R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low Freeway Freeway lighting, noise from NVP2 (see NVR08) operations increased traffic volumes may affect behaviour of fauna species.
28 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER17 West Gate West Gate Duplication of roads at the R Initial EP5 Likely Minor Medium EP1 (see ER01) Likely Insignificant Low Freeway Freeway waterway crossing would Provide vegetation offsets to achieve no net loss, EP5 - Works on waterways operations increase shading of the as required, in accordance with the Biodiversity Through detailed design and construction, design, locate and construct structures waterway of Koroit Creek Assessment Guidelines (DEPI, 2013) following to minimise, to the extent practicable, impact on riparian and aquatic habitat in and new flyovers the development of the final design The location Kororoit Creek, Stony Creek, Maribyrnong River and Moonee Ponds Creek. associated with the Hyde of any offsets should be as near as possible to the Street interchange would area where the loss has occurred create a new source of shading over Stony Creek. Shading is considered likely impact aquatic vegetation cover and primary productivity at a localised level. ER74 West Gate West Gate Increase in artificial R Likely Minor High LVP3 (see LVR1) Possible Minor Medium Freeway Freeway lighting, noise from NVP1 (see NVR06) operations increased traffic volumes may affect behaviour of fauna species. ER83 West Gate West Gate Piers are to be installed on P Initial EP4 (see ER18) Likely Moderate High EP4 (see ER04) Possible Minor Medium Freeway Freeway the banks of Stony Creek EP5 (see ER17 operations and Kororoit Creek to SWP9 (see SWR29) support new road structures. It is considered SWP10 (see SWR29) that structures have the SWP11 (see SWR1) potential to alter flows and hydrology. Impacts to flow and hydrology may impact the extent and cover of instream vegetation and change aquatic fauna movement. ER86 West Gate West Gate Increased run-off and spills R Initial EP5 (see ER17) Likely Moderate High SWP5 (see SWR41) Possible Minor Medium Freeway Freeway on carriageways leading to operations degradation of water quality and loss of aquatic ecological values ER20 Tunnels Tunnel operations Discharge of tunnel R Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low drainage water SWP5 (see SWR41) (stormwater runoff and groundwater) to waterways or stormwater systems or degradation of remnant vegetation lining Stony Creek and/or Maribyrnong River. ER78 Tunnels Tunnel operations Potential impacts of R Possible Insignificant Low GWP3 (see GWR3) Unlikely Insignificant Low groundwater availability to GWP4 (see GWR3) areas of remnant GWP5 (see GWR3) vegetation due the tunnel operation. ER24 Tunnels Tunnel operations Discharge of tunnel R Unlikely Minor Low SWP5 (see SWR41) Unlikely Insignificant Low drainage water (stormwater runoff and groundwater) into areas of surrounding planted vegetation. ER79 Tunnels Tunnel operations Potential impacts of R Possible Moderate Medium GWP3 (see GWR3) Rare Moderate Low groundwater availability to GWP4 (see GWR3) areas of planted vegetation GWP5 (see GWR3) due the tunnel operation. ER37 Tunnels Tunnel operations Discharge of tunnel R Possible Minor Medium SWP6 (see SWR13) Unlikely Minor Low drainage water SWP7 (see SWR1) (stormwater runoff and groundwater) to waterways GWP3 (see GWR3) or stormwater systems.
West Gate Tunnel Project | Environment Effects Statement 29 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R ER47 Port, CityLink Port, city and Loss or degradation of R Initial EP1 (see ER01) Possible Insignificant Low EP1 (see ER01) Possible Insignificant Low and city CityLink traffic Brackish Wetland EVC Initial EP2 (see ER-4) EP2 (see ER01) connections operations lining Moonee Ponds EP7 (see ER01) Creek due to shade from viaducts. ER49 Port, CityLink Port, city and Loss or degradation of R Initial EP1 (see ER01) Possible Insignificant Low EP1 (see ER01) Possible Insignificant Low and city CityLink traffic planted vegetation and EP5 (see ER17) connections operations urban ecology values as a EP6 (see ER03) result of the impact of shading from the elevated road structures. ER60 Port, CityLink Port, city and Increase in artificial R Possible Minor Medium LVP3 (see LVR1) Possible Insignificant Low and city CityLink traffic lighting, noise from NVP1 (see NVR06) connections operations increased traffic volumes NVP2 (see NVR08) may affect behaviour of fauna species. ER71 Port, CityLink Port, city and Increase in artificial R Possible Minor Medium NVP1 (see NVR06) Possible Insignificant Low and city CityLink traffic lighting, noise from LVP3 (see LVR1) connections operations increased traffic volumes may affect behaviour of fauna species. ER84 Port, CityLink Port, city and Potential for bank widening P Initial EP4 (see ER18) Likely Moderate High EP5 (see ER17) Almost Minor Medium and city CityLink traffic along Moonee Ponds SWP9 (see SWR29) certain connections operations Creek to support new road SWP10 (see SWR29) structures. It is considered that structures have the SWP11 (see SWR1) potential to alter flows and hydrology. Impacts to flow and hydrology may impact the extent and cover of instream vegetation and change fauna movement. ER87 Port, CityLink Port, city and Increased run-off and spills R Initial EP5 (see ER17) Likely Moderate High SWP5 (see SWR41) Possible Minor Medium and city CityLink traffic on carriageways leading to connections operations degradation of water quality and loss of aquatic ecological values Greenhouse Gas Emissions Construction Risks GHGR01 West Gate Site clearance and Land clearing and P Initial GGP1 Greenhouse gas emissions Almost Minor Medium GGP2 - Emissions reduction Almost Minor Medium Freeway construction site consumption of fossil fuels Integrate sustainable design practices into the Certain In detailed design, consider the selection of materials and monitor energy and Certain Tunnel establishment for electricity generation, design process to minimise, to the extent carbon during construction, to target reductions for GHG emission impacts of operation of plant and Port, CityLink practicable, greenhouse gas emissions arising materials and energy consumption in accordance with Mat-1 (Level 2) and Ene-1 equipment, and and city from construction, operations and maintenance of (Level 2) credits of the Infrastructure Sustainability (IS) rating tool (v1.2). connections transportation of materials the West Gate Tunnel Project. Include mandatory LPP1 (see LUPR2) and equipment during actions under the Protocol for Environmental EP1 (see ER01) construction resulting in Management (Greenhouse Gas Emissions and the release of greenhouse Energy Efficiency in Industry) for selection of best CSP2 (see CSR1) gas emissions. practice energy usage for the Tunnel ventilation and lighting systems. GHGR02 West Gate Earthworks Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway from construction activities Certain CSP2 (see CSR1) Certain Tunnel including consumption of Port, CityLink fossil fuels for operation of plant and equipment. and city connections GHGR03 West Gate Relocation of Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Possible Minor Medium Freeway power lines and from construction activities Certain Tunnel towers, protection including consumption of of other utilities that fossil fuels for electricity Port, CityLink and city may be impacted generation and operation connections of plant and equipment. Greenhouse gas emissions related to manufacturing and transportation of construction materials.
30 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GHGR04 West Gate Construction of Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway surface roads and from construction activities Certain Certain Tunnel other civil including consumption of infrastructure works fossil fuels for electricity Port, CityLink generation, operation of and city connections plant and equipment and transportation of materials and equipment. Greenhouse gas emissions related to manufacturing construction materials. GHGR05 West Gate Construction of Inefficient use of materials, R Initial GGP1 (see GHGR01) Likely Minor Medium GGP2 (see GHGR01) Possible Minor Medium Freeway surface roads and fossil fuels, and electricity, Tunnel other civil or accidental release of infrastructure works hydrocarbons, during Port, CityLink and city construction resulting in additional resource connections consumption and release of greenhouse gas emissions. GHGR06 West Gate Construction of Construction delays R Possible Minor Low GGP2 (see GHGR01) Possible Minor Low Freeway surface roads and causing additional Tunnel other civil consumption of materials infrastructure works and fossil fuels during Port, CityLink construction resulting in and city connections additional greenhouse gas emissions. GHGR07 West Gate Ancillary Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway development – from construction activities Certain Certain Tunnel noise barriers, including consumption of Freeway fossil fuels for electricity Port, CityLink Management generation, operation of and city connections System plant and equipment and transportation of materials and equipment. Greenhouse gas emissions related to manufacturing construction materials. GHGR08 West Gate North Yarra Main Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway Sewer realignment from construction activities Certain Certain Tunnel and protection of including consumption of other utilities fossil fuels for electricity Port, CityLink and city generation, operation of plant and equipment and connections transportation of materials and equipment. Greenhouse gas emissions related to manufacturing construction materials. GHGR09 West Gate North Yarra Main Potential direct R Initial GGP1 (see GHGR01) Possible Minor Low - Possible Minor Low Freeway Sewer realignment greenhouse gas emissions Tunnel and protection of released from sewer during Port, CityLink other utilities realignment works. and city connections GHGR10 West Gate Dive Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway structure/portal from construction activities Certain Certain Tunnel construction including consumption of fossil fuels for electricity Port, CityLink and city generation, operation of plant and equipment and connections transportation of materials and equipment. Greenhouse gas emissions related to manufacturing construction materials.
West Gate Tunnel Project | Environment Effects Statement 31 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GHGR11 West Gate Dive Inefficient use of materials, R Initial GGP1 (see GHGR01) Likely Minor Medium GGP2 (see GHGR01) Possible Minor Medium Freeway structure/portal fossil fuels, and electricity Tunnel construction during construction resulting in additional Port, CityLink resource consumption and and city connections release of greenhouse gas emissions. GHGR12 West Gate Precast plant Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway construction and from construction activities Certain Certain Tunnel manufacturing of including consumption of precast units fossil fuels for electricity Port, CityLink generation, operation of and city connections plant and equipment and transportation of materials and equipment. GHGR13 West Gate Precast plant Unacceptable quality of R Unlikely Minor Low GGP2 (see GHGR01) Unlikely Minor Low Freeway construction and materials from the Tunnel manufacturing of manufacture of precast (or precast units other materials) leading to Port, CityLink and city additional resource consumption and the connections release of greenhouse gas emissions. GHGR14 Tunnels Tunnelling activities Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Moderate High GGP2 (see GHGR01) Almost Minor Medium from construction activities Certain Certain including consumption of fossil fuels for electricity generation, operation of plant and equipment and transportation of materials and equipment. GHGR15 Tunnels Tunnelling activities Accidental release of R Unlikely Minor Low BP7 - Gas utilities Unlikely Minor Low uncombusted natural gas Unless agreed otherwise with the asset owner, ensure that: during realignment of transmission gas pipeline x No works are undertaken within 3.0 metres of any licensed transmission gas resulting in the pipeline or underground regulating station unintentional release of x Subject to the requirement below, clearances to all gas assets are as per the greenhouse gas Conditions of works as detailed in SP AusNet Technical Standards TS2607.1, emissions. TS2607.2 and TS2607.3, as amended or replaced from time to time x Risk assessments and safety studies detailing the impact on gas network infrastructure are completed in accordance with AS2885, which is the Standards Australia standard for the design, construction, testing, operations and maintenance of gas and petroleum pipelines that operate at pressure in excess of 1050 kPa, as amended or replaced from time to time. GHGR16 Tunnels Tunnelling activities Change in the planned R Unlikely Moderate Medium GGP2 (see GHGR01) Unlikely Minor Low operation of the tunnel boring machine (for example change in operation speed to reduce vibration or as a result of unplanned geological conditions) resulting in additional resource consumption and release of greenhouse gas emissions. GHGR17 Tunnel Construction and Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Port, CityLink associated civil from construction activities Certain Certain and city infrastructure works including consumption of connections for the: bridge over fossil fuels for electricity the Maribyrnong generation, operation of River; twin viaducts plant and equipment and and the shared transportation of materials user path; and the and equipment. new city Greenhouse gas emissions connections related to manufacturing construction materials.
32 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GHGR18 Port, CityLink Construction of the Inefficient use of materials, R Initial GGP1 (see GHGR01) Likely Minor Medium GGP2 (see GHGR01) Likely Minor Medium and city new city fossil fuels, and electricity connections connections and during construction associated civil resulting in additional infrastructure works resource consumption and release of greenhouse gas emissions. GHGR19 Port, CityLink Construction of the Construction delays R Possible Minor Low GGP2 (see GHGR01) Possible Minor Low and city new city causing additional connections connections and consumption of materials associated civil and fossil fuels during infrastructure works construction resulting in additional greenhouse gas emissions. Operation Risks GHGR20 West Gate West Gate Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium Freeway Freeway from operational and Certain TP3 (see TR1) Certain operations maintenance activities including consumption of fossil fuels for electricity generation, operation of plant and equipment and transportation of materials and equipment. GHGR21 West Gate Operation of West Actual greenhouse gas R Possible Minor Low - Possible Minor Low Freeway Gate Freeway; emissions are higher than Tunnel tunnels; and port, estimated due to CityLink and city differences in modelled Port, CityLink connections, emissions and actual traffic and city connections including twin use. viaducts GHGR22 Tunnels Tunnel operations Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Moderate High GGP2 (see GHGR01) Almost Moderate High from operational and Certain Certain maintenance activities including consumption of fossil fuels for electricity generation, operation of plant and equipment and transportation of materials and equipment. GHGR23 Port, CityLink Port, city and Greenhouse gas emissions P Initial GGP1 (see GHGR01) Almost Minor Medium GGP2 (see GHGR01) Almost Minor Medium and city CityLink traffic from operational and Certain Certain connections operations, maintenance activities including twin including consumption of viaducts fossil fuels for electricity generation, operation of plant and equipment and transportation of materials and equipment.
West Gate Tunnel Project | Environment Effects Statement 33 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Ground Movement Construction Risks GMR01 West Gate Earthworks Kororoit Creek Crossing R Initial GMP1. Prepare a geotechnical model of Unlikely Moderate Medium GMP1 - Geotechnical model and assessment Unlikely Moderate Medium Freeway and Hyde Street representative geological and groundwater Prepare a geotechnical model of representative geological and groundwater connection works. Ground conditions prior to excavation and tunnelling in conditions prior to excavation and tunnelling in subject area(s) to identify geological movement, due to the subject area(s) to identify geological structures structures and groundwater features. This model must include details of proposed presence of poorly and groundwater features. This model must excavations and tunnels, construction staging, and identify surface and sub-surface compacted landfill include details of proposed excavations and structures and infrastructure which could be impacted by the Project, including the materials where new tunnels, construction staging, and identify surface specific attributes of those structures. This model must be used to assess the sections of road are built and sub-surface structures and infrastructure predicted settlement, ground movement, stress redistribution and horizontal strain over former quarry areas, which may be impacted by the project, including profiles caused by excavation and tunnelling on adjacent property and resulting in adverse the specific attributes of those structures. infrastructure. settlement impacts to new Initial GMP3. Property and infrastructure at risk Maintain the predictive model throughout the construction period and review roads or associated from damage will be reviewed to determine against monitoring data (EPR GMP5), to regularly assess potential ground structures. (Including new appropriate settlement criteria to prevent damage. movement impacts. sections of elevated road Condition surveys will be undertaken pre and post alignment are built over construction for property and infrastructure GMP3 - Condition surveys and determination of settlement criteria for former quarry areas). identified as being of risk of damage. property and infrastructure Initial GMP4. Settlement criteria for individual Before works commence, and subject to receiving landowner consent on suitable utility structures and infrastructure must be terms, undertake condition surveys of property and infrastructure identified in the determined in consultation with the relevant geotechnical model and assessment (EPR GMP1) as being at risk of damage by a authorities prior to the commencement of any suitably qualified professional. Post-construction condition surveys of those construction potentially affecting the individual properties must be undertaken after construction of the Project is completed. utility or infrastructure. The results of the condition surveys and the modelling undertaken under GM1 Initial GMP5. Develop and implement a pre- must be used to determine appropriate settlement criteria for the relevant property construction, construction and post-construction and infrastructure. program to monitor groundwater levels, Where potential for ground movement impacts could occur, consult with affected subsidence and lateral movement during stakeholders. Any damage caused to property or infrastructure as a result of the construction activities and operation during the Project must be rectified or the landowner or asset owner compensated. concession period. Establish an independent mediation process for the assessment of claims for Initial GMP6. Should the geotechnical model or property and infrastructure damage to operate up to three years post opening of subsequent monitoring program identify the Freeway. exceedances of the criteria, appropriate mitigation GMP4 - Settlement criteria for utilities measures will be implemented. Settlement criteria for individual utility structures and infrastructure must be determined in consultation with the relevant authorities prior to commencement of any construction potentially affecting the individual utility or infrastructure. GMP5 - Ground movement monitoring Develop and implement a pre-construction, construction and post-construction program to monitor subsidence and lateral movement during construction activities and during operation. Implement a baseline ground movement monitoring plan prior to commencement of construction, in locations where construction activities with the potential to cause ground movement will occur, to assess background fluctuations. GMP6 - Mitigation of ground movement impact Implement appropriate mitigation measures should the geotechnical model (EPR GMP1), predictive groundwater model (EPR GWP4), or subsequent monitoring program identify exceedances of criteria identified in EPR GMP3 and EPR GMP4.. GMR02 West Gate Earthworks Ground movement, due to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low Freeway road widening and Initial GMP4 (see GMR01) GMP4 (see GMR01) differential movement Initial GMP5 (see GMR01) GMP5 (see GMR01) between old and new earth embankment zones which Initial GMP6 (see GMR01) GMP6 (see GMR01) results adverse impact (e.g. cracking of asphalt surfaces at join lines). GMR03 West Gate Earthworks Ground movement due to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low Freeway potential reactive subgrade Initial GMP3 (see GMR01) GMP3 (see GMR01) soils which impacts on Initial GMP4 (see GMR01) GMP4 (see GMR01) road maintenance (asphalt cracking) and ride quality Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01)
34 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GMR04 West Gate Earthworks Ground movement due to R Initial GMP1 (see GMR01) Unlikely Moderate Medium GMP1 (see GMR01) Unlikely Moderate Medium Freeway instability of built slopes, Initial GMP3 (see GMR01) GMP3 (see GMR01) which adversely impacts Initial GMP4 (see GMR01) GMP4 (see GMR01) on freeway abutments, creek crossings (Kororoit & Initial GMP5 (see GMR01) GMP5 (see GMR01) Stony Creek) or retained Initial GMP6 (see GMR01) GMP6 (see GMR01) slopes. Hyde St Connection across Stony Creek - Potential impact on existing river bank stability associated with construction GMR05 West Gate Earthworks Hyde St Connection across R Initial GMP1 (see GMR01) Unlikely Moderate Medium GMP1 (see GMR01) Unlikely Moderate Medium Freeway Stony Creek - Potential Initial GMP3 (see GMR01) GMP3 (see GMR01) impacts due to ground Initial GMP4 (see GMR01) GMP4 (see GMR01) settlement or lateral deflection (creep) of bridge Initial GMP5 (see GMR01) GMP5 (see GMR01) abutments due to imposed Initial GMP6 (see GMR01) GMP6 (see GMR01) loads in areas underlain by weak compressible soil GMR06 Tunnels Dive structure / Southern Portal - Potential R Initial GMP1 (see GMR01) Possible Moderate Medium GMP1 (see GMR01) Unlikely Minor Low portal construction impacts to residential and Initial GMP2. Design long term Tunnel drainage GMP2 - Tunnel and portal drainage commercial buildings and and adopt construction methods which minimise Through detailed design and construction, design tunnel and portal drainage and other infrastructure from changes to groundwater levels during operation adopt construction methods which minimise adverse changes to groundwater ground movement caused and construction to prevent or manage levels during construction and operation to prevent or manage the effects of ground by dewatering subsidence. subsidence. Initial GMP3 (see GMR01) In addition to the above, for the northern and southern portal areas design and Initial GMP4 (see GMR01) implement engineering control measures to ensure dewatering does not result in Initial GMP5 (see GMR01) adverse ground movement impact on property or infrastructure.. Initial GMP6 (see GMR01) GMP3 (see GMR01) GMP4 (see GMR01) GMP5 (see GMR01) GMP6 (see GMR01) GMR07 Tunnels Dive structure / Southern Portal - Potential R Initial GMP1 (see GMR01) Unlikely Major Medium GMP1 (see GMR01) Unlikely Major Medium portal construction impacts to existing West Initial GMP3 (see GMR01) GMP3 (see GMR01) Gate freeway and Initial GMP4 (see GMR01) GMP4 (see GMR01) associated infrastructure from ground movement Initial GMP5 (see GMR01) GMP5 (see GMR01) associated with deep Initial GMP6 (see GMR01) GMP6 (see GMR01) excavations (i.e. ground relaxation) GMR08 Tunnels Dive structure / Northern Portal - Potential R Initial GMP1 (see GMR01) Unlikely Moderate Medium GMP1 (see GMR01) Unlikely Minor Low portal construction impacts to residential and Initial GMP2 (see GMR06) GMP2 (see GMR06) commercial buildings and Initial GMP3 (see GMR01) GMP3 (see GMR01) other infrastructure from ground movement caused Initial GMP4 (see GMR01) GMP4 (see GMR01) by dewatering Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR09 Tunnels Dive structure / Northern Portal - Potential R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low portal construction impacts to Whitehall Street Initial GMP3 (see GMR01) GMP3 (see GMR01) infrastructure from ground Initial GMP4 (see GMR01) GMP4 (see GMR01) movement associated with deep excavations (i.e. Initial GMP5 (see GMR01) GMP5 (see GMR01) ground relaxation) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR10 Tunnels Tunnelling Potential impacts to R Initial GMP1 (see GMR01) Possible Moderate* Medium GMP1 (see GMR01) Unlikely Moderate* Medium commercial buildings and Initial GMP2 (see GMR06) GMP2 (see GMR06) other infrastructure from Initial GMP3 (see GMR01) GMP3 (see GMR01) tunnelling settlement. Initial GMP4 (see GMR01) GMP4 (see GMR01) Shallow cover area between Northern portal to Initial GMP5 (see GMR01) GMP5 (see GMR01) Chainage 54,175 m Initial GMP6 (see GMR01) GMP6 (see GMR01)
West Gate Tunnel Project | Environment Effects Statement 35 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GMR11 Tunnels Tunnelling Potential impacts to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low residential and commercial Initial GMP2 (see GMR06) GMP2 (see GMR06) buildings and other Initial GMP3 (see GMR01) GMP3 (see GMR01) infrastructure from settlement tunnelling Initial GMP4 (see GMR01) GMP4 (see GMR01) settlement. Initial GMP5 (see GMR01) GMP5 (see GMR01) Deep Cover area between Initial GMP6 (see GMR01) GMP6 (see GMR01) Chainage 54,175 m and Chainage 52,600 m (West Gate freeway) GMR12 Tunnels Tunnelling Ground Movement caused R Initial GMP1 (see GMR01) Unlikely Moderate Medium GMP1 (see GMR01) Unlikely Moderate Medium by tunnelling adversely Initial GMP2 (see GMR06) GMP2 (see GMR06) road asset function in Initial GMP3 (see GMR01) GMP3 (see GMR01) Whitehall Street or Hall Street (shallow cover Initial GMP4 (see GMR01) GMP4 (see GMR01) area)* Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR13 Tunnels Tunnelling Ground Movement caused R Initial GMP1 (see GMR01) Rare Major Medium GMP1 (see GMR01) Rare Major Medium by tunnelling adversely Initial GMP2 (see GMR06) GMP2 (see GMR06) affects the serviceability of Initial GMP3 (see GMR01) GMP3 (see GMR01) shallow buried services (e.g. major pipelines). Initial GMP4 (see GMR01) GMP4 (see GMR01) Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR14 Tunnels Tunnelling Ground Movement caused R Initial GMP1 (see GMR01) Unlikely Insignificant Low GMP1 (see GMR01) Unlikely Insignificant Low by tunnelling results in Initial GMP2 (see GMR06) GMP2 (see GMR06) ground settlement which Initial GMP3 (see GMR01) GMP3 (see GMR01) adversely affects Stony Creek Initial GMP4 (see GMR01) GMP4 (see GMR01) Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR15 Tunnels Tunnelling Ground Movement caused R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low by tunnelling results in Initial GMP2 (see GMR06) GMP2 (see GMR06) settlement which adversely Initial GMP3 (see GMR01) GMP3 (see GMR01) affects the serviceability of Williamstown and Newport Initial GMP4 (see GMR01) GMP4 (see GMR01) Rail lines Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR16 Tunnels Tunnelling Potential impacts to West R Initial GMP1 (see GMR01) Unlikely Major Medium GMP1 (see GMR01) Unlikely Major Medium Gate freeway and Initial GMP2 (see GMR06) GMP2 (see GMR06) associated infrastructure Initial GMP3 (see GMR01) GMP3 (see GMR01) from tunnelling settlement. For area between West Initial GMP4 (see GMR01) GMP4 (see GMR01) Gate freeway and Initial GMP5 (see GMR01) GMP5 (see GMR01) Chainage 52,000 m Initial GMP6 (see GMR01) GMP6 (see GMR01) Including shallow cover area under Williamstown Road and areas of backfilled Stony Creek under freeway containing poor ground conditions. GMR17 Tunnels Tunnelling Potential impacts to West R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low Gate freeway and Initial GMP2 (see GMR06) GMP2 (see GMR06) associated infrastructure Initial GMP3 (see GMR01) GMP3 (see GMR01) from tunnelling settlement. Initial GMP4 (see GMR01) GMP4 (see GMR01) For area between within West Gate freeway reserve Initial GMP5 (see GMR01) GMP5 (see GMR01) between and east bound Initial GMP6 (see GMR01) GMP6 (see GMR01) and west bound Southern Portals. Chainage 52,000 m to 50,900 m. GMR18 Tunnels Tunnelling Ground Movement caused R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low by tunnelling results in Initial GMP2 (see GMR06) GMP2 (see GMR06) settlement which adversely Initial GMP3 (see GMR01) GMP3 (see GMR01) affects existing tower supports for 220 kVa high Initial GMP4 (see GMR01) GMP4 (see GMR01) voltage power lines Initial GMP5 (see GMR01) GMP5 (see GMR01) positioned close to tunnel Initial GMP6 (see GMR01) GMP6 (see GMR01) alignment.
36 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GMR19 Tunnels Tunnelling Potential ground R Initial GMP1 (see GMR01) Unlikely Major Medium GMP1 (see GMR01) Rare Major Low movement impacts to Initial GMP2 (see GMR06) GMP2 (see GMR06) pressurised pipelines due Initial GMP3 (see GMR01) GMP3 (see GMR01) to tunnel construction. Initial GMP4 (see GMR01) GMP4 (see GMR01) Gas transmission and jet fuel pipelines within Initial GMP5 (see GMR01) GMP5 (see GMR01) Newport railway corridor Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR20 Tunnels Tunnelling Potential impacts to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low existing piled bridge Initial GMP2 (see GMR06) GMP2 (see GMR06) supports due to tunnelling Initial GMP3 (see GMR01) GMP3 (see GMR01) ground movement. Initial GMP4 (see GMR01) GMP4 (see GMR01) Westgate freeway grade separation bridge over Initial GMP5 (see GMR01) GMP5 (see GMR01) Newport railway line Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR21 Tunnels Tunnel and portal Potential impacts caused R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low construction by construction of the West Initial GMP2 (see GMR06) GMP2 (see GMR06) Gate Tunnels and northern Initial GMP3 (see GMR01) GMP3 (see GMR01) portal on the existing and realigned NYM sewer Initial GMP4 (see GMR01) GMP4 (see GMR01) Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR22 Tunnels NYM sewer Potential impacts to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Rare Minor Low relocation, manhole residential and commercial Initial GMP2 (see GMR06) GMP2 (see GMR06) shafts buildings and other Initial GMP3 (see GMR01) GMP3 (see GMR01) infrastructure from ground movement caused by Initial GMP4 (see GMR01) GMP4 (see GMR01) dewatering Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR23 Tunnels NYM sewer Potential impacts to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Moderate Low relocation, manhole Whitehall Street Initial GMP3 (see GMR01) GMP3 (see GMR01) shafts infrastructure from ground Initial GMP4 (see GMR01) GMP4 (see GMR01) movement associated with deep excavations (i.e. Initial GMP5 (see GMR01) GMP5 (see GMR01) ground relaxation) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR24 Tunnels Micro-tunnelling for Potential impacts to R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low North Yarra Main commercial buildings and Initial GMP2 (see GMR06) GMP2 (see GMR06) Sewer relocation other infrastructure from Initial GMP3 (see GMR01) GMP3 (see GMR01) tunnelling settlement (sewer relocation). Initial GMP4 (see GMR01) GMP4 (see GMR01) Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR26 Port, CityLink Earthworks Ground movement caused R Initial GMP1 (see GMR01) Unlikely Minor Low GMP1 (see GMR01) Unlikely Minor Low and city by application of new Initial GMP2 (see GMR06) GMP2 (see GMR06) connections surface loads during Initial GMP3 (see GMR01) GMP3 (see GMR01) construction of road embankments which Initial GMP4 (see GMR01) GMP4 (see GMR01) results in consolidation Initial GMP5 (see GMR01) GMP5 (see GMR01) settlement of compressible Initial GMP6 (see GMR01) GMP6 (see GMR01) soils or fill and potential adverse impact to new roads and existing infrastructure. GMR28 Port, CityLink Earthworks Ground movement due to R Initial GMP1 (see GMR01) Rare Moderate Low GMP1 (see GMR01) Rare Moderate Low and city instability of built slopes, Initial GMP3 (see GMR01) GMP3 (see GMR01) connections which adversely impacts Initial GMP4 (see GMR01) GMP4 (see GMR01) on abutments, creek crossings or retained Initial GMP5 (see GMR01) GMP5 (see GMR01) slopes. Initial GMP6 (see GMR01) GMP6 (see GMR01) GMR29 Port, CityLink Earthworks Ground movement impacts R Initial GMP1 (see GMR01) Rare Moderate Low GMP1 (see GMR01) Rare Moderate Low and city due to deep pile installation Initial GMP3 (see GMR01) GMP3 (see GMR01) connections in close proximity to major Initial GMP4 (see GMR01) GMP4 (see GMR01) rail tunnels (MMRP) Initial GMP5 (see GMR01) GMP5 (see GMR01) Initial GMP6 (see GMR01) GMP6 (see GMR01)
West Gate Tunnel Project | Environment Effects Statement 37 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Operation Risks GMR25 Tunnels Tunnel operations Potential impacts to R Initial GMP1 (see GMR01) Rare Minor Low GMP1 (see GMR01) Rare Minor Low residential and commercial Initial GMP2 (see GMR06) GMP2 (see GMR06) buildings and other Initial GMP3 (see GMR01) GMP3 (see GMR01) infrastructure from ground movement caused by Initial GMP4 (see GMR01) GMP4 (see GMR01) groundwater Initial GMP5 (see GMR01) GMP5 (see GMR01) depressurisation during Initial GMP6 (see GMR01) GMP6 (see GMR01) operation GMR27 Port, CityLink Earthworks Ground movement caused R Initial GMP1 (see GMR01) Possible Minor Medium GMP1 (see GMR01) Possible Minor Medium and city by differential settlement Initial GMP3 (see GMR01) GMP3 (see GMR01) connections between stable piled Initial GMP4 (see GMR01) GMP4 (see GMR01) structures and shallow road abutments due to Initial GMP5 (see GMR01) GMP5 (see GMR01) long term creep within Initial GMP6 (see GMR01) GMP6 (see GMR01) compressible soils (i.e. Coode Island Silt) causing potential adverse impacts and increased maintenance for new roads and associated structures. Groundwater Construction Risks GWR1 West Gate Earthworks Potential impacts on R Initial SWP6 (see SWR13) Unlikely Minor Low SWP6 (see SWR13) Unlikely Minor Low Freeway groundwater quality through loss of containment of hazardous chemicals such as fuels. GWR2 Tunnels Dive structure / Potential impacts on R Initial GWP7 Rare Moderate Low GWP7 - Impacts on groundwater users Rare Moderate Low portal construction groundwater availability – Develop a plan to maintain water supply to Conduct a review and confirm the status of potential use of extraction bores within resource and registered identified groundwater users. the estimated construction drawdown area. Develop and implement if required a bores. plan to maintain water supply to identified groundwater users.
38 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GWR3 Tunnels Dive structure / Potential impacts on R Initial GWP3 Possible Major High GWP3 - Tunnel drainage design and construction methods Unlikely Major Medium portal construction groundwater-dependent or Design long term tunnel drainage and adopt Design long term tunnel drainage and adopt construction methods which minimise surface water ecosystems construction methods which minimise changes to changes to groundwater levels during construction and operation to manage, through lowering of groundwater levels during construction and mitigate and minimise: groundwater or reduced operation to prevent or manage: groundwater supply to a x Mobilisation of contaminated groundwater surface water body. x Mobilisation of contaminated groundwater x Dewatering and potential impacts of acid sulphate soils, including both x Dewatering and potential impacts on acid unconsolidated sediments and lithified sedimentary rock sulphate soils and sediments x Protection of waterways and potential groundwater dependent ecosystems, x Protection of waterways and potential including terrestrial ecosystems groundwater-dependent ecosystems x Avoid any other adverse impacts of groundwater level changes such as x Avoid any other adverse impacts of subsidence. groundwater level changes such as Design contingency measures and/or controls as required to: subsidence. x Ensure maintenance of the base flow associated with a reduction or loss of Initial GWP4. Develop and maintain a predictive groundwater discharge to Stony Creek or loss of water availability for groundwater model throughout the construction terrestrial ecosystems. period to assess the potential impacts of dewatering during construction and the design of x Limit acidification should monitoring indicate a potential adverse impact to potential contingency measures. water levels or quality. Initial GWP5. Develop and implement a pre- Design contingency measures and/or controls as required should movement of construction, construction and post-construction contamination be identified. Contingency measures to include consideration of: groundwater monitoring program to calibrate and x Improvements to barrier system and ground treatments at the portal to reduce verify the predictive model, manage construction inflows and drawdowns activities and monitor operation during the concession period. Groundwater sampling must x Hydraulic control of the movement of the contaminated groundwater be consistent with EPA Publication 669 (2000) Implement engineering control measures and/or ground treatment to minimise to Groundwater Sampling Guidelines. the extent practicable groundwater inflow during excavation, construction and operation of tunnels, cross passages and subsurface excavations. Implement measures to limit groundwater inflow during construction to excavations and drawdown should monitoring indicate acidification is occurring. Develop and implement a plan to mitigate and manage potential future displacement of contaminated groundwater in the vicinity of the NYM sewer, in accordance with State Environment Protection Policy Groundwaters of Victoria 1997(Vic) and State Environment Protection Policy Prevention and Management of Contaminated Land 2002(Vic), including: x Investigate the properties identified as potentially contaminated and likely to be influenced by the changed groundwater conditions x Assess the influence of changed conditions on potentially contaminated groundwater at these properties x Assess the risk posed to human health and the environment, including the potential for vapour intrusion to indoor air of buildings x Develop contingency measures to control any adverse risks. GWP4 - Predictive groundwater model Develop and maintain a predictive groundwater model throughout the construction period to assess the potential impacts of dewatering during construction and develop potential contingency measures.
West Gate Tunnel Project | Environment Effects Statement 39 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GWP5 - Groundwater Monitoring Develop and implement a pre-construction, construction and post-construction groundwater monitoring program to calibrate the predictive model prior to commencement of construction and verify the model predictions post-construction, manage construction activities and monitor during operation that as a minimum: x Establishes a baseline condition for groundwater (quality, level, flow and GDE health) prior to the commencement of construction x Can be used to identify (and manage) changes to groundwater (quality, level, flow and GDE health) during construction and operation activities. x Can be used to assess (and manage) the impact of construction on: x Groundwater beneficial uses (or users of surface water, groundwater and land) x Areas considered a high contamination risk x Groundwater Dependant Ecosystems (e.g. Stony Creek, Yarraville Gardens) x North Yarra Main Sewer x Acid Sulphate Soils x Compressible materials x Portal, tunnel, and cross passage construction x Can be used to determine the requirement for intervention, and assess the effectiveness of mitigation measures proposed or implemented to protect groundwater x Can be used to calibrate and verify a predictive numerical model developed as part of the Project x Groundwater sampling undertaken consistent with EPA Victoria Publication 669 (2000) Groundwater Sampling Guidelines. GWR4 Tunnels Tunnelling activities Potential impacts on Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low groundwater availability – Initial GWP5 (see GWR3) GWP5 (see GWR3) resource and registered Initial GWP7 (see GWR2) GWP7 (see GWR2) bores. GWR5 Tunnels Tunnelling activities Potential impacts on R Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low groundwater-dependent or Initial GWP4 (see GWR3) GWP4 (see GWR3) surface water ecosystems Initial GWP5 (see GWR3) GWP5 (see GWR3) through lowering of groundwater or reduced groundwater supply to a surface water body. GWR6 Tunnels Dive structure / Potential for acidification R Initial GWP3 (see GWR3) Possible Major High GWP3 (see GWR3) Unlikely Major Medium portal construction and impact of groundwater Initial GWP4 (see GWR3) GWP4 (see GWR3) through dewatering of in Initial GWP5 (see GWR3) GWP5 (see GWR3) situ acid sulphate soils or rock. Initial GWP6. Develop and implement measures GWP6 - Interception of groundwater for management of groundwater interception The CEMP must include requirements and methods for management of during construction, including: groundwater interception during construction, including: Identification, treatment, disposal and x x Identification, treatment, disposal and handling of contaminated seepage handling of contaminated seepage water water and/or slurries including vapours in accordance with relevant legislation and/or slurries including vapours and guidelines x Assessment of barrier/damming effects x Assessment of barrier/damming effects x Subsidence management x Subsidence management x Dewatering and potential impacts on acid sulphate soils, including both unconsolidated x Dewatering and potential impacts on acid sulphate soils, including both sediments and lithified sedimentary rock unconsolidated sediments and lithified sedimentary rock Protection of waterways and potential x Protection of waterways and potential groundwater dependent ecosystems groundwater-dependent ecosystems contingency x Contingency actions when interventions are required. actions when intervention is required. GWR7 Tunnels Dive structure / Potential impacts on R Initial GWP3 (see GWR3) Possible Major High GWP3 (see GWR3) Unlikely Major Medium portal construction groundwater quality Initial GWP4 (see GWR3) GWP4 (see GWR3) through displacement of Initial GWP5 (see GWR3) GWP5 (see GWR3) existing contamination. GWR8 Tunnels Tunnelling activities Potential for acidification R Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low and impact of groundwater Initial GWP5 (see GWR3) GWP5 (see GWR3) through dewatering of in Initial GWP6 (see GWR6) GWP6 (see GWR6) situ acid sulphate soils or rock.
40 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GWR9 Tunnels Tunnelling activities Potential impacts on R Initial GWP3 (see GWR3) Possible Minor Medium GWP3 (see GWR3) Unlikely Minor Low groundwater quality Initial GWP5 (see GWR3) GWP5 (see GWR3) through displacement of existing contamination. GWR10 Tunnels Dive structure / Disposal of groundwater R Initial GWP1. Develop and implement measures Possible Moderate Medium GWP1 - Groundwater management measures Possible Moderate Medium portal construction from tunnel inflows to for management, monitoring, reuse and disposal Prepare and implement a CEMP and an OEMP to include measures for sewer affects the reuse of of groundwater inflows during construction that management, monitoring, reuse and disposal of groundwater inflows during treated water at the complies with relevant legislation and guidelines. construction and operation that comply with relevant legislation and guidelines, downstream, municipal Initial GWP6 (see GWR6) including but not limited to: WWTP. x State Environment Protection Policy Groundwaters of Victoria 1997 (Vic) x State Environment Protection Policy Waters of Victoria 2003 (Vic) x State Environment Protection Policy Prevention and Management of Contaminated Land 2002 (Vic) x Water Industry Regulations 2006 (Vic). GWP6 (see GWR6) GWR11 Tunnels Tunnelling activities Disposal of groundwater R Refer GWR10 Possible Moderate Medium GWP1 (see GWR10) Possible Moderate Medium from tunnel inflows to GWP6 (see GWR6) sewer affects the reuse of treated water at the downstream, municipal WWTP. GWR12 Tunnels Earthworks Potential impacts on R Initial SWP6 (see SWR13) Unlikely Minor Low SWP6 (see SWR13) Unlikely Minor Low groundwater quality Initial GWP2. Adopt construction methods that GWP2 - Protection of groundwater quality through loss of protect groundwater quality, for example: The CEMP must include requirements and construction methods that maintain containment of hazardous groundwater quality, for example: chemicals such as fuels. x Use sealing products, caulking products, lubricating products and chemical grouts x Use sealing products, caulking products, lubricating products and chemical applied during tunnelling construction that do grouts applied during tunnelling construction that do not diminish the not diminish the groundwater quality groundwater quality x Use fluids for artificial recharge activities that Use fluids for artificial recharge activities that do not diminish the groundwater do not diminish the groundwater quality x quality x Ensure compatibility of construction material with groundwater quality to provide long term x Ensure compatibility of construction material with groundwater quality to durability for tunnel design life provide long term durability for tunnel design life Develop drainage infrastructure that provides for x Develop drainage infrastructure that provides for the propensity of dissolved the propensity of dissolved constituents in constituents in groundwater to precipitate out of solution and create clogging groundwater to precipitate out of solution and and maintenance risks create clogging and maintenance risks. x Develop a plan to assess, remove and dispose of contaminated groundwater and impacted soils associated with pile and pile cap excavation and construction. GWR20 Port, CityLink Earthworks Potential for acidification R Initial GWP3 (see GWR3) Possible Moderate Medium GWP3 (see GWR3) Rare Moderate Low and city and impact of groundwater Initial GWP5 (see GWR3) GWP5 (see GWR3) connections through dewatering of in situ acid sulphate soils or rock. GWR21 Port, CityLink Earthworks Potential impacts on R Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low and city groundwater quality connections through displacement of existing contamination associated with dewatering of pile cap or other shallow excavations that intersect groundwater. GWR22 Port, CityLink Earthworks Potential impacts on R Initial GWP2 (see GWR12) Unlikely Minor Low GWP2 (see GWR12) Unlikely Minor Low and city groundwater quality connections through vertical mobilisation of existing contamination associated with driving or boring piles into the soils. GWR23 Port, CityLink Earthworks Potential impacts on R Initial SWP6 (see SWR13) Unlikely Minor Low SWP6 (see SWR13) Unlikely Minor Low and city groundwater quality connections through loss of containment of hazardous chemicals such as fuels.
West Gate Tunnel Project | Environment Effects Statement 41 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R GWR24 Port, CityLink Earthworks Disposal of groundwater R Initial GWP1 (see GWR10) Unlikely Minor Low GWP1 (see GWR10) Unlikely Minor Low and city from excavation inflows to connections sewer affects the reuse of treated water at the downstream, municipal WWTP. GWR25 West Gate Earthworks Potential for acidification R Initial GWP3 (see GWR3) Possible Moderate Medium GWP3 (see GWR3) Rare Moderate Low Freeway and impact of Initial GWP5 (see GWR3) GWP5 (see GWR3) groundwater through Initial GWP6 (see GWR6) GWP6 (see GWR6) dewatering of in situ acid sulphate soils or rock. GWR26 West Gate Earthworks Potential impacts on R Initial GWP2 (see GWR12) Unlikely Minor Low GWP2 (see GWR12) Unlikely Minor Low Freeway groundwater quality Initial GWP3 (see GWR3) GWP3 (see GWR3) through displacement of existing contamination associated with dewatering of pile cap or other shallow excavations that intersect groundwater GWR27 West Gate Earthworks Potential impacts on R Initial GWP2 (see GWR12) Unlikely Minor Low GWP2 (see GWR12) Unlikely Minor Low Freeway groundwater quality through vertical mobilisation of existing contamination associated with driving or boring piles into the soils. GWR28 West Gate Earthworks Disposal of groundwater R Initial GWP1 (see GWR10) Unlikely Minor Low GWP1 (see GWR10) Unlikely Minor Low Freeway from excavation inflows to sewer affects the reuse of treated water at the downstream, municipal WWTP. Operation Risks GWR13 Tunnels Tunnel operations Potential impacts on R Initial GWP7 (see GWR2) Unlikely Minor Low GWP7 (see GWR2) Unlikely Minor Low groundwater availability – resource and registered bores. GWR14 Tunnels Tunnel operations Potential impacts on R Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low groundwater-dependent or surface water ecosystems through lowering of groundwater or reduced groundwater supply. GWR15 Tunnels Tunnel operations Placement of tunnels R Initial GWP6 (see GWR6) Unlikely Minor Low GWP6 (see GWR6) Unlikely Minor Low blocks groundwater flow within the aquifer system. GWR16 Tunnels Tunnel operations Potential for acidification R Initial GWP3 (see GWR3) Unlikely Minor Low GWP3 (see GWR3) Unlikely Minor Low and impact of groundwater through dewatering of in situ acid sulphate soils or rock. GWR17 Tunnels Tunnel operations Potential impacts on R Initial GWP3 (see GWR3) Possible Major High GWP3 (see GWR3) Unlikely Major Medium groundwater quality Initial GWP5 (see GWR3) GWP5 (see GWR3) through displacement of existing contamination. GWR18 Tunnels Tunnel operations Materials of construction R Initial GWP2 (see GWR12) Rare Major Low GWP2 (see GWR12) Rare Major Low affect groundwater quality. GWR19 Tunnels Tunnel operations Disposal of groundwater R Initial GWP1 (see GWR10) Unlikely Minor Low GWP1 (see GWR10) Unlikely Minor Low from tunnel inflows to sewer affects the reuse of treated water at the downstream, municipal WWTP.
42 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Historical Heritage Construction Risks HHR01 West Gate Earthworks Upgrade works are P Initial CH2. Design permanent and temporary Possible Insignificant Low CHP2 - Design and construction to minimise impacts on heritage Possible Insignificant Low Freeway Construction of proposed to the existing works to minimise impacts on historic cultural Undertake detailed design of the permanent and temporary works to minimise surface roads and shared use path heritage in consultation with Heritage Victoria or impacts where practicable, on historic cultural heritage in consultation with Heritage other civil (Federation Trail) within the relevant local council. Victoria and relevant local councils. infrastructure works the extent of registration for the Main Outfall Sewer Prior to commencement of works that affect heritage structures or places, develop Landscaping (VHR H1932) and road and implement: works at Millers Road are x Physical protection measures for heritage structures and places as proposed in proximity to appropriate the heritage place x A methodology for any required dismantling, storage or reinstatement of heritage fabric (with reference to the ICOMOS Burra Charter 2013). HHR02 West Gate Earthworks Works could result in full or P Initial CH3. Develop an Archaeological Almost Minor Medium CHP3 - Archaeological Management Plan Almost Minor Medium Freeway partial disturbance or Management Plan detailing measures to avoid, certain Develop an Archaeological Management Plan detailing measures to avoid, certain removal of three VHI sites minimise, mitigate and manage disturbance of minimise, mitigate and manage disturbance of archaeological sites and values at Stony Creek archaeological sites and values affected by the affected by the works. Undertake investigations in accordance with the Guidelines x H7822-0422 Stony project. Undertake investigations in accordance for Investigating Historical Archaeological Artefacts and Sites, Heritage Victoria Creek Wharf #2 with the Guidelines for Investigating Historical 2014 and to the satisfaction of the Executive Director, Heritage Victoria. Archaeological Artefacts and Sites, Heritage (Stony Creek The Management Plan must include: Reclamation Piles) Victoria 2014 and to the satisfaction of the Executive Director, Heritage Victoria. The x Requirements for background historical research, excavation methodology, x H7822-0424 Stony management plan will include: research design, reporting and artefact management and analysis Creek Drawbridge x Requirements for background historical x The incorporation of strategies relating to the protection of sites of x H7822-0426 Stony research, excavation methodology, research archaeological interest in relevant master plans Creek Ballast design, reporting and artefact management Quarries and analysis x Protocols for managing previously unidentified historical archaeological sites discovered during the works. x The incorporation of strategies relating to the protection of sites of archaeological interest in relevant masterplans HHR03 West Gate Earthworks Disturbance of previously R Possible Moderate Medium CHP3 (see HHR02) Possible Minor Medium Freeway unidentified archaeological sites HHR04 West Gate Construction of Works to upgrade the P Likely Minor Medium CHP10 - Bluestone bridge Rare Insignificant Low Freeway surface roads and Kororoit Creek shared use Undertake any works at and/or in the immediate vicinity of the bluestone bridge other civil path may have a physical over Kororoit Creek (HO259) in a manner which avoids to the extent practicable infrastructure works impact on the significant disturbing surviving evidence of early road surfacing, including to the approaches fabric of the bluestone to the bridge. bridge over Kororoit Creek CHP5- Archival photographic records (HO259) Prior to construction, undertake archival photographic recording (interior and exterior) of all heritage buildings, streetscapes or places disturbed by the works in accordance with Heritage Victoria’s specification for the archival photographic recording of heritage places. CHP7 - Heritage interpretation strategy In consultation with the relevant local councils, develop and implement a heritage interpretation strategy for the Project which seeks to explore historical and Aboriginal cultural heritage themes. The strategy must include an audit of existing heritage interpretation. The strategy may include installation of signage regarding local heritage places and is to have a particular focus on the Footscray/Maribyrnong River area, and the Moonee Ponds Creek area. HHR05 West Gate Construction of Potential for visual impact P Initial CH2 (see HHR01) Possible Minor Medium None identified Unlikely Minor Medium Freeway surface roads and of new infrastructure other civil including the portal infrastructure works structure on the Bradmill boiler house (HO237)
West Gate Tunnel Project | Environment Effects Statement 43 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HHR06 West Gate Construction works Damage to heritage R Initial CH4 Undertake vibration monitoring during Possible Minor Medium CHP4 - Monitoring of heritage sites Possible Minor Medium Freeway (all) places, buildings or tunnel construction in proximity to sensitive sites, Undertake vibration monitoring during construction for heritage sites at risk of structures through and monitor their condition during and post impact and monitor their condition during and post construction for settlement and construction vibration construction for settlement and structural integrity structural integrity disturbance as a result of the proposed works. Report the results and/or land instability as a disturbance as a result of the proposed works. to the Executive Director and take remedial action, if required, to the satisfaction of result of works Report the results to the Executive Director and the Executive Director, Heritage Victoria. take remedial action, if required, to the satisfaction of the Executive Director, Heritage (Also refer to GMP3 and NVP7) Victoria. NVP3 (see NVR01) NVP7 (see NVR01) GMP1 (see GMR01) GMP3 (see GMR01) GMP4 (see GMR01) GMP5 (see GMR01) GMP6 (see GMR01) HHR07 Tunnel Site clearance & Potential impact on R Initial CH3 (see HHR02) Possible Minor Medium CHP3 (see HHR02) Possible Minor Medium construction site archaeological values of establishment the VHI site Commonwealth Fertilisers Wharves and Associated Land H7822-0528 HHR08 Tunnel Earthworks Disturbance of previously R Possible Moderate Medium CHP3 (see HHR02) Possible Minor Medium unidentified archaeological sites HHR09 Tunnel Construction works Potential for groundwater R Possible Minor Medium CHP2 (see HHR01) Possible Minor Medium changes as a result of the GWP3 (see GMR01) design and tree removals GWP5 (see GWR3) and other works for the proposed shared use path EP1 (see ER01) in Harris Street to have an EP6 (see ER03) adverse impact on the Yarraville Gardens (HO138) HHR10 Tunnel Construction works Damage to heritage R Initial CH4 (see HHR06) Possible Mino Medium CHP4 (see HHR06) Possible Minor Medium (all) places, buildings or NVP3 (see NVR01) structures through NVP7 (see NVR01) construction vibration and/or land instability as a GMP1 (see GMR01) result of works GMP3 (see GMR01) GMP4 (see GMR01) GMP5 (see GMR01) GMP6 (see GMR01) HHR11 Port, CityLink Construction of the Road works at Wurundjeri P Initial CH2 (see HHR01) Possible Minor Medium CHP2 (see HHR01) Unlikely Minor Low and city new city Way in proximity to the No. connections connections and 2 Goods Shed and the associated civil Retaining Wall in Flinders infrastructure works Street could have a physical and visual impact. HHR12 Port, CityLink Construction of Disturbance of known and R Possible Major High CHP8 - Shipwrecks Possible Minor Medium and city crossing over the unknown shipwrecks in the To confirm the presence of shipwrecks at the Maribyrnong River crossing, including connections Maribyrnong River Maribyrnong River or on its the Hilaria (S331) which is thought to be located on the west bank of the river, and associated civil banks, including the Hilaria undertake preliminary high-resolution sonar scan of river environs within the area infrastructure works (S331) to be affected by the works and targeted diving for sub-surface anomalies within the area affected by the works. Based on the results of investigations, as appropriate develop management measures in consultation with Heritage Victoria; these could include consideration in the detailed design and a detailed program of archaeological investigation. If the Edina (S199) is affected by works, record appropriately and relocate, if practicable, to a more secure location within the Maribyrnong riverine landscape or include as part of an interpretation strategy for display in the local area, to the satisfaction of Heritage Victoria. Engage a suitably qualified and experienced maritime archaeologist to undertake these tasks.
44 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HHR13 Port, CityLink Site clearance & Works in the vicinity of the P Possible Major High CHP2 (see HHR01) Unlikely Moderate Medium and city construction site wreck the Edina on the CHP8 (see HHR12) connections establishment east bank of the Construction of Maribyrnong River could bridge over the pose a physical risk to the Maribyrnong River wreck and associated civil infrastructure works HHR14 Port, CityLink Site clearance & Works could result in full or P Initial CH3 (see HHR02) Almost Minor Medium CHP3 (see HHR02) Almost Minor Medium and city construction site partial disturbance or certain certain connections establishment removal of the sites in Construction of Archaeological Zone 2: bridge over the H7822-0447 Maribyrnong River H7822-0478 and associated civil H7822-0527 infrastructure works H7822-0528 H7822-0451 H7822-0620 H7822-0434 H7822-0487 H7822-0442 HHR15 Port, CityLink Site clearance & Works could result in full or P Initial CH3 (see HHR02) Almost Minor Medium CHP3 (see HHR02) Almost Minor Medium and city construction site partial disturbance or certain certain connections establishment removal of the sites in Construction of Archaeological Zone 3: bridge over the H7822-0167 Maribyrnong River H7822-0312 and associated civil H7822-0166 infrastructure works HHR16 Port, CityLink Construction of the Road works at Wurundjeri P Initial CH3 (see HHR02) Possible Minor Medium CHP3 (see HHR02) Possible Minor Medium and city new city Way could result in full or connections connections and partial disturbance of associated civil Archaeological Zone 4 infrastructure works (Flinders Street archaeological site , H7822-1959) HHR17 Port, CityLink Earthworks Disturbance of previously R Possible Moderate Medium CHP3 (see HHR02) Possible Minor Medium and city unidentified archaeological connections sites HHR18 Port, CityLink Site clearance & Works could have a P Initial CH2 (see HHR01) Almost Minor Medium CHP2 (see HHR01) Almost Minor Medium and city construction site physical and visual impact certain CHP5 (see HHR04) certain connections establishment on the Mowling’s Soap and CHP7 (see HHR04) Construction of Candle Works (HO178) bridge over the Maribyrnong River and associated civil infrastructure works HHR19 Port, CityLink Site clearance & Works could have a P Initial CH2 (see HHR01) Almost Moderate High CHP3 (see HHR02) Almost Minor Medium and city construction site physical impact on the certain CHP5 (see HHR04) certain connections establishment Footscray Powder CHP7 (see HHR04) Construction of Magazine (HO177) bridge over the Maribyrnong River and associated civil infrastructure works HHR20 Port, CityLink Construction of Works occur in proximity to P Initial CH2 (see HHR01) Almost Minor Medium None identified Almost Minor Medium and city bridge over the the Barnet Glass Rubber certain certain connections Maribyrnong River Factory (HO78) and new and associated civil elevated structures could infrastructure works have a potential adverse impact at the place
West Gate Tunnel Project | Environment Effects Statement 45 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HHR21 Port, CityLink Site clearance & Construction works could P Initial CH2 (see HHR01) Almost Minor Medium CHP5 (see HHR04) Almost Minor Medium and city construction site result in physical and certain CHP7 (see HHR04) certain connections establishment visual impact on the Construction of the Moonee Ponds Creek and new city Infrastructure Precinct connections and (HO1092) including the associated civil interwar road bridge at infrastructure works Dynon Road and the lower reaches of the Moonee Ponds Creek (the latter not subject to heritage controls) HHR22 Port, CityLink Roadworks North and West Melbourne P Unlikely Insignificant Low None identified Unlikely Insignificant Low and city (HO3) roadworks could connections have a physical or visual impact HHR23 Port, CityLink Site clearance & Visual impact on Port P Initial CH2 (see HHR01) Almost Minor Medium CHP2 (see HHR01) Possible Insignificant Low and city construction site Phillip Monument certain CHP6 - Port Phillip Monument connections establishment Develop and implement an approach to maintain a link between the Port Phillip Construction of Monument and the Maribyrnong River, including establishing an appropriate setting bridge over the in consultation with the City of Melbourne which allows for interpretation, either on Maribyrnong River the existing or an alternative site. and associated civil CHP7 (see HHR04) infrastructure works HHR24 Port, CityLink Site clearance & Potential physical and P Initial CH2 (see HHR01) Almost Minor Medium CHP2 (see HHR01) Possible Minor Medium and city construction site visual impact on Bluestone certain CHP5 (see HHR04) connections establishment Drain (location of Billy CHP7 (see HHR04) Button Creek) Construction of CHP9 – Maribyrnong River front (Footscray) bridge over the Maribyrnong River Where practicable in detailed design retain evidence of historical infrastructure and and associated civil services in the vicinity of the Maribyrnong River front (Footscray), including rail infrastructure works tracks and the bluestone drain (Billy Button Creek). If removal is required, record in accordance with EPR CHP5. HHR25 Port, CityLink Site clearance & Removal of remnants that P Likely Minor Medium CHP2 (see HHR01) Unlikely Minor Low and city construction site reflect use of the area as a CHP5 (see HHR04) connections establishment maritime and industrial CHP7 (see HHR04) Construction of environment and visual CHP9 (see HHR24) bridge over the impact of new Maribyrnong River infrastructure at the and associated civil Footscray riverfront infrastructure works HHR26 Port, CityLink Site clearance & Potential physical impact P Likely Moderate High CHP5 (see HHR04) Likely Minor Medium and city construction site as a result of the CHP11 - Rail turntables connections establishment construction of the Through detailed design, consideration must be given to minimising impacts on the proposed new ramps on Construction of rail turntables to the extent practicable. If it is necessary to remove both of the rail the railway turntables at CityLink, port and turntables, develop and implement a methodology for the salvage and storage of city connections South Dynon one of the turntables to provide the opportunity for future reinstatement at an associated civil alternative site. infrastructure works HHR27 Port, CityLink Construction works Damage to heritage R Initial CH4 (see HHR06) Possible Minor Medium CHP4 (see HHR06) Possible Minor Medium and city (all) places, buildings or connections structures through construction vibration and/or land instability as a result of works
46 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Operation Risks Nil for Historical Heritage Human Health Construction Risks HR1 West Gate Construction of the Air emissions (from plant R Initial AQP6 – Air quality during construction (see Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium Freeway West Gate Freeway or mobilisation) associated AQR01) EMP4 Complaints management system component with construction activities Initial EMP4 – Complaints management system Prior to the commencement of works, other than preparatory works as referred to in resulting in health effects. Prior to the commencement of Works, other than the Incorporated Document), develop and implement a process for the recording, preparatory works as referred to in the management, and resolution of complaints from affected stakeholders consistent Incorporated Document), develop and implement with Australian Standard AS/NZS 100002: 2014 Guidelines for Complaint a process for the recording, management, and Management in Organisations. resolution of complaints from affected The complaints management system must be consistent with the Communications stakeholders consistent with Australian Standard and Community Engagement Plan required under EPR SP2. AS/NZS 100002: 2014 Guidelines for Complaint Management in Organisations. The complaints management system must be consistent with the Communications and Community Engagement Plan required under EPR SP2. HR2 West Gate Construction of the Noise and vibration R Initial NVP4 (see VR12) Possible Moderate Medium NVP3 (see NVR01) Possible Moderate Medium Freeway West Gate Freeway emissions from Initial NVP5 NVP4 (see NVR01) component construction activities Initial EMP4 (see HR1) EMP4 (see HR1) resulting in health effects. HR3 West Gate Construction of the Changes within the R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Possible Minor Medium Freeway West Gate Freeway community, such as the Initial EP2 (see ER01) EP2 (see ER01) component altered access or Initial LP1 TP3 (see TR1) connectivity to/ between recreational areas and Initial LVP2 (see LVR1) TP4 (see TR5) community facilities and Initial NVP4 (see VR12) TP5 (see TR5) active transport Initial TP3 (see TR5) TP7 (see TR2) infrastructure resulting in Initial TP4 (see TR5) SP2 (see SR01) potential implications to Initial TP5 (see TR5) SP3 (see SR86) public safety and the wellbeing of individuals Initial TP7 (see TR2) during construction. Initial SP2 (see SR01) Initial S3
HR4 Tunnels Construction of the Air emissions (from plant R Initial AQP6 (see AQR01) Possible Minor Medium AQP6 (see AQR01) Possible Minor Medium tunnels component or mobilisation) associated with construction activities resulting in health effects. HR5 Tunnels Realignment of the Air emissions from site R Initial AQP6 (see AQR01) Possible Minor Medium AQP6 (see AQR01) Possible Minor Medium North Yarra Main vehicles and the Sewer generation of odours and dust increasing annoyance or behavioural changes due to disamenity. HR6 Tunnels Construction of the Noise and vibration R Initial NVP4 (see VR12) Possible Moderate Medium NVP3 (see NVR01) Possible Moderate Medium tunnels component emissions from Initial NVP5 NVP4 (see NVR01) construction activities Initial NVP6 NVP5 (see NVR09) resulting in health effects. Initial NVP7 NVP6 (see NVR01) Initial NVP8 NVP7 (see NVR01) Initial NVP12 NVP11 (see NVR09) Initial NVP13 NVP12 (see NVR09)
HR7 Tunnels Construction of the Changes within the R Initial SP2 (see SR01) Unlikely Minor Low SP2 (see SR01) Unlikely Minor Low tunnels component community, such as the Initial S3 SP3 (see SR86) altered access or
connectivity to/ between recreational areas and community facilities and active transport infrastructure resulting in potential implications to public safety and the wellbeing of individuals during construction.
West Gate Tunnel Project | Environment Effects Statement 47 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HR8 Port, Construction of the Air emissions (from plant R Initial AQP6 (see AQR01) Possible Moderate Medium AQP6 (see AQR01) Possible Moderate Medium CityLink and port, CityLink and or mobilisation) associated Initial EMP4 (see HR01) EMP4 (see HR1) city city connections with construction activities connections component resulting in health effects. HR9 Port, Construction of the Noise and vibration R Initial NVP4 (see VR12) Possible Moderate Medium NVP3 (see NVR01) Possible Moderate Medium CityLink and port, CityLink and emissions from Initial NVP5 NVP4 (see NVR01) city city connections construction activities Initial EMP4 (see HR01) EMP4 (see HR1) connections component resulting health effects. HR10 Port, Construction of the Changes within the R Initial EP1 - (see ER01) Unlikely Minor Low EP1 (see ER01) Unlikely Minor Low CityLink and port, CityLink and community, such as the Initial EP2 (see ER01) EP2 (see ER01) city city connections altered access or Initial TP3 (see TR5) TP3 (see TR1) connections component connectivity to/ between recreational areas and Initial TP4 (see TR5) TP4 (see TR5) community facilities and Initial TP5 (see TR5) TP5 (see TR5) active transport Initial TP7 (see TR2) TP7 (see TR2) infrastructure resulting in Initial SP2 (see SR01) SP2 (see SR01) potential implications to Initial S3 SP3 (see SR86) public safety and the wellbeing of individuals during construction. Operation Risks HR11 West Gate Operation of the A change in the R Initial AQP4 (see AQR28) Possible Insignificant Low AQP4 (see AQR28) Possible Insignificant Low Freeway West Gate Freeway concentration and Initial AQP5 (see AQR30) AQP5 (see AQR30) component exposure to particulate matter, nitrogen dioxide, carbon monoxide, VOCs and PAHs from air emissions associated with changes in the composition and volume of vehicles using the West Gate Freeway and local roads resulting in health effects. Health effects may include respiratory and cardiovascular morbidity (acute and chronic respiratory cardiovascular hospital admissions) or mortality. HR12 West Gate Operation of the A change in the relative R Initial NVP1 Likely Moderate High NVP1 (see NVR06) Possible Minor Medium Freeway West Gate Freeway exposure to noise and Initial NVP2 NVP2 (see NVR08) component vibration from the Initial NVP3 operation of the West Gate Freeway and local roads, increasing annoyance, impacting upon the cognitive function in schools, or resulting in sleep disturbance at night, causing an increase in hypertension, increased risk from cardiovascular morbidity or premature mortality. HR13 West Gate Operation of the Changes within the R Initial EP3 (see ER03) Unlikely Minor Low EP3 (see ER03) Unlikely Minor Low Freeway West Gate Freeway community, such as the Initial EP6 (see ER03)) EP6 (see ER03) component altered access or Initial TP2 (see TR10) TP3 (see TR1) connectivity to/ between recreational areas and Initial TP3 (see TR3) TP4 (see TR5) community facilities and Initial TP4 (see TR5) TP5 (see TR5) active transport Initial TP5 (see TR5) TP7 (see TR2) infrastructure resulting in Initial TP7 (see TR2) SP2 (see SR01) potential implications to Initial SP2 (see SR01) SP3 (see SR86) public safety and the wellbeing of individuals Initial S3 from operation of the West Gate Freeway component.
48 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HR14 Tunnels Operation of the A change in the R Initial AQP1 (see AQR29) Possible Insignificant Low AQP1 (see AQR29) Possible Insignificant Low tunnels component concentration and Initial AQP2 (see AQR30) AQP2 (see AQR 30) exposure to particulate Initial AQP3 (see AQR29) AQP3 (see AQR 29) matter, nitrogen dioxide, carbon monoxide, VOCs Initial ASP4 (see AQR28) AQP4 (see AQR28) and PAHs from air emissions for communities in proximity to the portals and vents, or users of the tunnels, resulting in health effects. Health effects may include respiratory and cardiovascular morbidity (acute and chronic respiratory cardiovascular hospital admissions) or mortality. HR15 Tunnels Operation of the A change in the relative R Initial NVP1 Possible Moderate Medium CHP1 (see AHR1) Unlikely Minor Low tunnels component exposure to noise Initial NVP2 NVP1 (see NVR06) emissions for communities Initial NVP3 NVP2 (see NVR08) and sensitive receptors in proximity to portals and Initial NVP10 (see VR1) NVP9 (see NVR01) vents increasing Initial NVP11 NVP10 (see NVR09) annoyance, impacting upon the cognitive function in schools, or resulting in sleep disturbance at night, causing an increase in hypertension, increased risk from cardiovascular morbidity or premature mortality. HR16 Port, Operation of the A change in the R Initial AQP4 (see AQR28) Unlikely Insignificant Low AQP4 (see AQR28) Unlikely Insignificant Low CityLink and port, CityLink and concentration and Initial AQP5 (see AQR30) AQP5 (see AQR30) city city connections exposure to particulate connections component matter, nitrogen dioxide, carbon monoxide, VOCs and PAHs from air emissions for vehicles using the port, CityLink and city connections, resulting in health effects. Health effects may include respiratory and cardiovascular morbidity (acute and chronic respiratory cardiovascular hospital admissions) or mortality. HR17 Port, Operation of the A change in noise and R Initial NVP1 Likely Moderate High NVP1 (see NVR06) Possible Minor Medium CityLink and port, CityLink and vibration from the Initial NVP2 NVP2 (see NVR08) city city connections operation of the port, Initial NVP3 connections component CityLink and city connections increasing annoyance, impacting upon the cognitive function in schools, or resulting in sleep disturbance at night, causing an increase in hypertension, increased risk from cardiovascular morbidity or premature mortality.
West Gate Tunnel Project | Environment Effects Statement 49 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R HR18 Port, Operation of the Changes within the R Initial EP3 (see ER03) Unlikely Minor Low EP3 (see ER03) Unlikely Minor Low CityLink and port, CityLink and community, such as the Initial EP6 (see ER03) EP6 (see ER03) city city connections altered access or Initial TP2 (see TR10) TP2 (see TR10) connections component connectivity to/ between recreational areas and Initial TP3 (see TR5) TP3 (see TR1) community facilities and Initial TP4 (see TR5) TP4 (see TR5) active transport Initial TP5 (see TR5) TP5 (see TR5) infrastructure resulting in Initial TP7 (see TR2) TP7 (see TR2) potential implications to Initial SP2 (see SR01) SP2 (see SR01) public safety and the wellbeing of individuals Initial SP3 SP3 (see SR86) from operation of the port, CityLink and city connections component Land Use Planning Construction Risks LUPR1 West Gate Site clearance, Site clearance, R Initial LPP1 Design to minimise permanent Unlikely Minor Low LPP5 Public Land Unlikely Minor Low Freeway construction site construction site footprint to reduce adverse impacts on potentially Through detailed design and construction reduce the disruption to the extent establishment and establishment and affected land uses, particularly: practicable, to current uses of public and council land resulting from temporary construction construction activities, x Parks occupation. activities resulting in impacts on EMP2 Environmental Management Plans industrial, commercial, x Reserves/ gardens Prepare and implement a Construction Environmental Management Plan (CEMP), residential and recreational x Recreational and community facilities land uses. Worksite Environmental Management Plans (WEMPs), Operations Environmental x Residential properties in proximity to the Management Plan (OEMP) and other plans as required by the Environmental Construction Area Performance Requirements (EPRs) in accordance with the Environmental x Commercial and industrial units. Management Strategy. Initial TP3 (see TR1) The development of the Environmental Management Strategy, the CEMP, the WEMPs and OEMP must include consultation with relevant councils, VicRoads, Initial AQP6 (see AQR01) Melbourne Water, EPA Victoria and other authorities as relevant. These Initial NVP4 (see VR12) consultation processes must be described in the Environmental Management Initial SP1 (see SR29) Strategy. Initial BP1 (see BR2) The CEMP should be prepared in accordance with EPA Victoria Publication 480, Initial BP2 (see BR1) Environmental Guidelines for Major Construction Sites (EPA 1996). Initial BP3 (see BR7) TP3 (see TR1) Initial LV6 (see LVR1) WMP1 - Waste Management Initial CSP2 (see CSR1) Develop and implement management measures for waste (excluding soils) Initial CSP4 (see CSR1) minimisation during construction and operation in accordance with the Environment Protection Act 1970 waste management hierarchy and management options, to address: x Litter management x Construction and demolition wastes including, but not limited to, washing residues, slurries and contaminated water x Organic wastes x Inert solid wastes. AQP6 (see AQR01) NVP3 (see NVR01) NVP4 (see NVR01) NVP6 (see NVR01) NVP8 (see NVR01) GMP6 (see GMR01) SP1 (see SR29) BP1 (see BR2) BP2 (see BR1) BP3 (see BR7) BP6 (see BR4) BP8 (see BR2) BP9 (see BR3) LVP3 (see LVR1) CHP4 (see HHR06) CSP2 (see CSR1) CSP4 (see CSR1)
50 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LUPR5 Tunnels Site clearance, Site clearance, R Initial TP3 (see TR1) Possible Minor Medium LPP5 (see LUPR1) Possible Minor Medium construction site construction site Initial AQP6 (see AQR01) EMP2 (see LUPR1) establishment and establishment and Initial NVP4 (see VR12) TP3 (see TR1) construction construction activities, activities resulting in impacts on Initial BP1 (see BR2) WMP1 (see LUPR1) industrial, commercial, Initial BP2 see BR1) AQP6 (see AQR01) residential and recreational Initial BP3 (see BR7) NVP3 (see NVR01) land uses. Initial LVP6 (see LVR1) NVP4 (see NVR01) Initial CHP4 (see HHR06) NVP6 (see NVR01) Initial CSP2 (see CSR1) NVP8 (see NVR01) Initial CSP4 (see CSR1) GMP6 (see GMR01) SP1 (see SR29) BP1 (see BR2) BP2 (see BR1) BP3 (see BR7) BP6 (see BR4) BP8 (see BR2) BP9 (see BR3) LVP3 (see LVR1) CHP4 (see HHR06) CSP2 (see CSR1) CSP4 (see CSR1) LUPR9 Port, Site clearance, Site clearance, R Initial TP3 (see TR1) Likely Minor Medium LPP5 (see LUPR1) Likely Minor Medium CityLink and construction site construction site Initial NVP4 (see VR12) EMP2 (see LUPR2) city establishment and establishment and Initial BP1 (see BR2) TP3 (see TR1) connections construction construction activities, activities resulting in impacts on Initial BP2 (see BR1) AQP6 (see AQR01) industrial, commercial, Initial BP3 (see BR7) WMP1 (see LUPR1) recreational and residential Initial LV6 (see LVR1) NVP3 (see NVR01) land uses. Initial CSP2 (see CSR1) NVP4 (see NVR01) Initial CSP4 (see CSR1) NVP6 (see NVR01) NVP8 (see NVR01) GMP6 (see GMR01) BP1 (see BR2) BP2 (see BR1) BP3 (see BR7) BP6 (see BR4) BP8 (see BR2) BP9 (see BR3) LVP3 (see LVR1) CHP4 (see HHR06) CSP2 (see CSR1) CSP4 (see CSR1) Operational Risks LUPR20 West Gate West Gate Freeway West Gate Freeway R Initial AQP4 (see AQR28) Unlikely Minor Low EMP2 (see LUPR1) Unlikely Minor Low Freeway operations operations resulting in Initial NVP3 AQP4 (see AQR28) impacts on existing and Initial LVP1 (see LVR3) NVP1 (see NVR06) planned land uses which are inconsistent with NVP2 (see NVR08) planning policies and land LVP1 (see LVR3) use zoning by reason of LVP3 (see LVR1) amenity (combination of SP1 (see SR29) noise/air quality/ lighting/
views)
West Gate Tunnel Project | Environment Effects Statement 51 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LUPR2 West Gate Project development Project development and R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 - Minimise design footprint Unlikely Minor Low Freeway and operations operations resulting in Initial TP3 (see TR1) Through detailed design, minimise the permanent footprint of the Project to the impacts on industrial, Initial AQP6 (see AQR01) extent practicable to reduce adverse impacts on potentially affected land uses, commercial, residential particularly: and recreational land uses Initial NVP4 (see VR12) which are inconsistent with Initial SP1 (see SR29) x Parks planning policies and land Initial BP1 (see BR2) x Reserves/ gardens use zoning. Initial LV6 (refer LVR1) x Recreational and community facilities Initial CSP2 (see CSR1) x Residential properties in proximity to the construction area Initial CSP4 (see CSR1) x Commercial and industrial sites. LPP2 Recreational facilities Through detailed design and construction, minimise to the extent practicable any impacts on users of recreational facilities including Westgate Public Golf Course, Crofts Reserve, Hyde Street Reserve, Donald McLean Reserve, Railway Place and Miller Street Reserve, and McIvor Reserve. Access to, and amenity and function of recreation facilities is to be maintained to the extent practicable in consultation with the land manager. LPP5 (see LUPR1) SP1 (see SR29) LVP3 (see LVR1) LUPR3 West Gate Project development Project development and R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low Freeway and operations operations resulting in Initial CSP2 (see CSR1) LPP3 - Future development opportunities impacts on strategic policy Initial CSP4 (see CSR1) Do not preclude the possibility of a future road connection between Precinct 15 or future development (Hobsons Bay Council) and Bradmill Precinct (Maribyrnong Council). potential of areas including Precinct 15 or Bradmill. Manage, to the extent practicable, the impacts on the future implementation of the draft Railway Place and Miller Street Reserve Concept Plan in consultation with City of Melbourne. Manage, to the extent practicable, the impacts on future built form of 48–54 Digital Drive, Digital Harbour in consultation with the landowner/developer. LUPR4 West Gate Relocation of 220 Relocation of 220 kilovolt R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low Freeway kilovolt power lines power lines and towers Initial BP1 (see BR2) LPP5 (see LUPR1) and towers, resulting in a permanent Initial BP3 (see BR7) protection of other impact on land uses or Initial BP6 (see BR4) utilities that may be built form which are Initial LV6 (refer LVR1) impacted. inconsistent with planning policies and land use zoning. LUPR23 West Gate Project development Permanent impacts on Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low Freeway and operations existing and planned uses Initial SP1 (see SR29) SP1 (see SR29) as a result of land BP4 (see BR1) acquisition associated with the project design which BP9 (see BR3) are inconsistent with planning policies and land use zoning LUPR21 Tunnels Tunnel operations Tunnel operations resulting R Initial AQP1. Design and implement a tunnel Unlikely Minor Low EMP2 (see LUPR1) Unlikely Minor Low in impacts on existing and ventilation system to meet the best practice and SP1 (see SR29) planned land uses which design criteria requirements of the SEPP (AQM). AQP1 (see AQR29) are inconsistent with Initial AQP2. Design the tunnel ventilation system AQP2 (see AQR30) planning policies and land to achieve zero portal emissions during operation. AQP4 (see AQR28) use zoning by reason of Initial AQP5. Monitor the in-tunnel air quality and amenity (combination of ventilation structure emission during operation of NVP1 (see NVR06) noise/air quality/ lighting/ the ventilation system to demonstrate compliance NVP2 (see NVR08) views) with SEPP (Air Quality Management) and the NVP10 (see NVR09) EPA license to the satisfaction of EPA Victoria NVP11 (see NVR09) and report the results publicly on a quarterly basis LVP1 (see LVR3) for five years post commencement of operation or as agreed with EPA Victoria. Take any required remedial action as soon as practicable if targets are not met. Initial NVP3 Initial NVP10 (see VR1) Initial NVP16 Initial LVP1 (see LVR3)
52 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LUPR6 Tunnels Project development Project development and R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low and operations operations resulting in Initial SP1 (see SR29) LPP2 (see LUPR2) impact on industrial, Initial LV6 (see LVR1) LPP5 (see LUPR1) commercial, residential and recreational land uses Initial CSP4 (see CSR1) SP1 (see SR29) which are inconsistent with LVP3 (see LVR1) planning policies and land use zoning. LUPR7 Tunnels Project development Project development and R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low and operations operations resulting in Initial CSP4 (see CSR1) impacts on strategic policy or the future development potential of areas including Precinct 15, Footscray or the Joseph Road Precinct. LUPR8 Tunnels North Yarra Main Realignment of the North R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low Sewer realignment Yarra Main Sewer and/or Initial LVP6 (refer LVR1) LPP5 (see LUPR1) and/ or protection, protection and protection of
and protection of other utilities resulting in a other utilities permanent impact on land uses which are inconsistent with planning policies and land use zoning. LUPR24 Tunnels Permanent impacts Permanent impacts on P Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low on existing and existing and planned uses Initial SP1 (see SR29) SP1 (see SR29) planned uses as a result of land BP4 (see BR1) acquisition associated with the project design which BP9 (see BR3) are inconsistent with planning policies and land use zoning LUPR22 Port, Port, city and Port, city and CityLink R Initial AQP4 (see AQR28) Possible Minor Medium EMP2 (see LUPR1) Possible Minor Medium CityLink and CityLink traffic traffic operations resulting Initial NVP3 AQP4 (see AQR28) city operations in impacts on existing and Initial LVP1 (see LVR3) NVP1 (see NVR06) connections planned future land uses which are inconsistent with NVP2 (see NVR08) planning policies and land LVP1 (see LVR3) use zoning by reason of LVP3 (see LVR1) amenity (combination of SP1 (see SR29) noise/air quality/ lighting/ traffic/views) LUPR10 Port, Project development Project development and R Initial LPP1 (see LUPR1) Likely Minor Medium LPP1 (see LUPR2) Likely Minor Medium CityLink and and operations operations resulting in Initial SP1 (see SR29) LPP2 (see LUPR2) city impacts on recreational Initial LVP6 (refer LVR1) LPP3 (see LUPR3) connections land uses which are inconsistent with planning Initial CSP4 (see CSR1) LPP4 – Pedestrian and cycling connections policies and land use Do not preclude the possibility of future pedestrian connections between: zoning, including Moonee x North and West Melbourne, E-Gate and Docklands to Moonee Ponds Creek Ponds Creek and Railway (the Moonee Ponds Creek Trail / Capital City Trail) Place and Miller Street Reserve. x Digital Harbour and West Melbourne by upgrading pedestrian crossings at the intersection of Wurundjeri Way and Dudley Street. LPP5 (see LUPR1) SP1 (see SR29) LVP3 (see LVR1) LUPR11 Port, Project development Project development and R Initial LPP1 (see LUPR1) Likely Minor Medium LPP1 (see LUPR2) Likely Minor Medium CityLink and and operations operations resulting in Initial CSP4 (see CSR1) LPP3 (see LUPR3) city impact on strategic policy LPP4 (see LUPR10) connections or the future development potential of areas including LPP5 (see LUPR1) E-Gate, Arden Macaulay SP1 (see SR29) Precinct, Dynon Precinct, West Melbourne or Docklands Precinct.
West Gate Tunnel Project | Environment Effects Statement 53 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LUPR12 Port, Project development Development of bridge R Initial LPP1 (see LUPR1) Likely Minor Medium LPP1 (see LUPR2) Likely Minor Medium CityLink and and operations over the Maribyrnong River Initial SP1 (see SR29) LPP5 (see LUPR1) city and associated civil Initial LV6 (see LVR1) SP1 (see SR29) connections infrastructure works resulting in impacts on Initial CSP4 (see CSR1) LVP3 (see LVR1) industrial, commercial and residential land uses which are inconsistent with planning policies and land use zoning. LUPR13 Port, Project development Development and R Initial LPP1 (see LUPR1) Possible Minor Medium LPP1 (see LUPR2) Possible Minor Medium CityLink and and operations operation of bridge over Initial SP1 (see SR29) LPP2 (see LUPR2) city Maribyrnong River and Initial LV6 (refer LVR1) LPP5 (see LUPR1) connections associated civil infrastructure works Initial CSP4 (see CSR1) SP1 (see SR29) resulting in impacts on LVP3 (see LVR1) recreational land uses which are inconsistent with planning policies and land use zoning. LUPR14 Port, Project development Development and R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low CityLink and and operations operation of the viaduct/s Initial SP1 (see SR29) LPP5 (see LUPR1) city and the shared use path Initial LV6 (see LVR1) SP1 (see SR29) connections and associated civil infrastructure works, Initial CSP4 (see CSR1) LVP3 (see LVR1) resulting in impacts on industrial land uses which are inconsistent with planning policies and land use zoning. LUPR15 Port, Project development Development and R Initial LPP1 (see LUPR1) Rare Minor Low LPP1 (see LUPR2) Rare Minor Low CityLink and and operations operation of viaduct/s and Initial SP1 (see SR29) LPP2 (see LUPR2) city the shared use path and Initial LVP6 (refer LVR1) LPP5 (see LUPR1) connections associated civil infrastructure works Initial CSP4 (see CSR1) SP1 (see SR29) resulting in impacts on LVP3 (see LVR1) recreational land uses which are inconsistent with planning policies and land use zoning. LUPR16 Port, Project development Construction of the R Initial LPP1 (see LUPR1) Unlikely Minor Low LPP1 (see LUPR2) Unlikely Minor Low CityLink and and operations viaduct/s and the shared Initial CSP4 (see CSR1) LPP4 (see LUPR10) city use path and associated LPP5 (see LUPR1) connections civil infrastructure works resulting in impacts to strategic policy or the future development potential of areas including Dynon Precinct LUPR17 Port, Project development Development and R Initial LPP1 (see LUPR1) Possible Minor Medium LPP1 (see LUPR2) Possible Minor Medium CityLink and and operations operation of the new city Initial SP1 (see SR29) LPP5 (see LUPR1) city connections and Initial LV6 (see LVR1) SP1 (see SR29) connections associated civil infrastructure works Initial CSP4 (see CSR1) LVP3 (see LVR1) resulting in impacts on industrial, commercial and residential land uses which are inconsistent with planning policies and land use zoning.
54 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LUPR18 Port, Project development Development and R Initial LPP1 (see LUPR1) Possible Minor Medium LPP1 (see LUPR2) Possible Minor Medium CityLink and and operations operation of the new city Initial SP1 (see SR29) LPP2 (see LUPR2) city connections and Initial LV6 (refer LVR1) LPP3 (see LUPR3) connections associated civil infrastructure works Initial CSP4 (see CSR1) LPP4 (see LUPR10) resulting in impacts on LPP5 (see LUPR1) recreational land uses SP1 (see SR29) which are inconsistent with LVP3 (see LVR1) planning policies and land use zoning, including Moonee Ponds Creek and Railway Place and Miller Street Reserve. LUPR19 Port, Project development Development and R Initial LPP1 (see LUPR1) Likely Minor Medium LPP1 (see LUPR2) Likely Minor Medium CityLink and and operations operation of the new city Initial CSP4 (see CSR1) LPP3 (see LUPR3) city connections and LPP4 (see LUPR10) connections associated civil infrastructure works, LPP5 (see LUPR1) resulting in impacts to strategic policy or the future development potential of areas including E-Gate, Arden Macaulay Precinct, Dynon Precinct, West Melbourne or the Docklands Precinct. LUPR25 Port, Permanent impacts Permanent impacts on P Initial LPP1 (see LUPR1) Possible Moderate Medium LPP1 (see LUPR2) Possible Minor Medium CityLink and on existing and existing and planned uses Initial SP1 (see SR29) SP1 (see SR29) city planned land uses as a result of land BP4 (see BR1) connections acquisition associated with the project design which BP9 (see BR3) are inconsistent with planning policies and land use zoning Landscape and Visual Impact Construction Risks LVR1 West Gate Construction Adverse impacts to views R Initial LVP2 Possible Minor Medium LVP2 - Reinstatement of temporary works Unlikely Minor Low Freeway activities experienced from parks Design permanent and temporary works in Avoid direct impacts on the Yarraville Gardens unless agreed by the City of and reserves due to consultation with relevant stakeholders including Maribyrnong. construction compounds the relevant local councils to minimise adverse Reinstate public open spaces, vegetation cover and facilities disturbed by visual impact, the footprint and disturbance, and temporary works to the reasonable satisfaction of the land manager. to maximise connectivity to public open spaces. LVP3 - Light spillage Initial LVP3 Detailed design of the works must minimise light spillage to protect the amenity of Avoid direct impacts on the Yarraville Gardens. adjacent land uses to the extent practicable. Reinstate public open spaces, vegetation cover and facilities disturbed by temporary works to the The CEMP must include requirements and methods to minimise light spillage, to satisfaction of the land manager. the extent practicable, during construction to protect the amenity of adjacent surrounding neighbourhoods, parks and community facilities including urban Where vegetation is to be replanted or relocated environments, in consultation with relevant stakeholders. and additional planting proposed, a design would be supplied detailing the species that would be SP2 (see SR01) used, how it would be managed and how it is suitable to the area. Selected vegetation species should be locally endemic and native to area where it would be planted. Initial LVP6 Develop and implement management measures in consultation with relevant stakeholders to minimise light spillage during construction to protect the amenity of adjacent surrounding neighbourhoods, parks and community facilities including urban environments. LVR2 West Gate Construction Adverse impacts to views R Initial LV6 (see LVR1) Possible Minor to Medium LVP2 (see LVR1) Unlikely Minor Low Freeway activities experienced from public moderate LVP3 (see LVR1) residential areas due to SP2 (see SR01) construction compounds BP3 (see BR7) LVR6 Tunnels Construction Adverse impacts to views Initial LVP2 (see LVR1) Unlikely Insignificant Low LVP2 (see LVR1) Unlikely Insignificant Low activities experienced from parks Initial LVP3 (see LVR1) LVP3 (see LVR1) and reserves due to Initial LVP6 (see LVR1) SP2 (see SR01) construction compounds
West Gate Tunnel Project | Environment Effects Statement 55 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LVR12 Port, CityLink Construction Adverse impacts to views R Initial LVP2 (see LVR1) Possible Moderate Medium LVP2 (see LVR1) Unlikely Minor Low and city activities experienced from shared Initial LVP3 (see LVR1) LVP3 (see LVR1) connections user paths due to Initial LVP6 (see LVR1) SP2 (see SR01) construction compounds Operation Risks LVR3 West Gate West Gate Adverse impacts to views P Initial LVP1 Unlikely Moderate Medium LVP1 – Urban design approach Unlikely Minor Low Freeway Freeway experienced from parks The project design should respond to the West Detailed design development must respond to the West Gate Tunnel Project urban operations and reserves due to the Gate Tunnel Project Urban Design Strategy. In design principles and vision. In doing so it must minimise, to the extent practicable, project doing so it should minimise impacts on the built landscape and visual impacts, and maximise opportunities for enhancement of environment and landscape, including public public amenity, open space and facilities, resulting from the Project, in consultation open space, and maximise opportunities for with relevant stakeholders, particularly in relation to: enhancement of public amenity resulting from the project, in consultation with relevant stakeholders, x Heritage assets particularly in relation to: x Bridges and structures x heritage assets x Existing landmark urban elements across the Project, including CityLink x bridges and structures x Open space including, Yarraville Gardens, Hyde Street Reserve, Donald x existing landmark urban elements across the McLean Reserve, Railway and Millers Street Reserve project x Community and recreational assets including the, Yarraville Community x open space including, Donald McLean Centre, Yarraville Gardens, Westgate Golf Club, Spotswood Cricket/ Football Reserve Oval, W.L.J. Crofts Reserve, shared paths along Kororoit Creek, Maribyrnong x community and recreational assets including River, Stony Creek, and Moonee Ponds Creek, various bowls and tennis clubs the, Westgate Golf Club, Spotswood Cricket/ in the vicinity of the Project Football Oval, shared paths along Kororoit x Residential interfaces Creek and various bowls and tennis clubs in the vicinity of the project x Business interfaces. LVP4 – Vegetation screening x residential interfaces As part of the Landscaping Plan (refer EPR EP6), implement vegetation screening x business interfaces for visually impacted community spaces, including residential areas and public Commercial ‘third party’ signage is prohibited. open spaces. The plan must include measures to ensure vegetation screening is This includes any ‘billboard’ signage on or used where practicable if Project infrastructure would be visible from residential adjacent to any infrastructure associated with the areas and public open spaces. project. SP2 (see SR01) Initial LVP2 (see LVR1) Initial LVP3 (see LVR1) Initial LVP4 Maximise opportunities to enhance open space and facilities, improve pedestrian access and shared user paths and achieve a net increase in tree canopy consistent with the West Gate Tunnel Project Urban Design Strategy. Initial LVP5 Design the project in accordance with the UDS to minimise light spillage and protect the amenity of adjacent land uses. LVR4 West Gate West Gate Adverse impacts to views P Initial LVP1 (see LVR3) Possible Moderate Medium LVP1 (see LVR3) Possible Minor Medium Freeway Freeway experienced from public Initial LVP5 (see LVR3) LVP4 (see LVR3) operations residential areas due to the SP2 (see SR01) project LVR5 West Gate West Gate Adverse impacts to views P Initial LVP1 (see LVR3) Possible Severe High LVP1 (see LVR3) Possible Severe High Freeway Freeway experienced from private Initial LVP5 (see LVR3) LVP4 (see LVR3) operations residential areas SP2 (see SR01) immediately adjacent the project LVR7 Tunnels Tunnels operations Adverse impacts to views P Initial LVP1 (see LVR3) Unlikely Major Medium LVP1 (see LVR3) Unlikely Major Medium experienced from parks Initial LVP2 (see LVR1) LVP4 (see LVR3) and reserves due to the Initial LVP3 (see LVR1) SP2 (see SR01) project Initial LVP4 (see LVR3) Initial LVP5 (see LVR3) LVR8 Tunnels Tunnels Adverse impacts to views P Initial LVP1 (see LVR3) Unlikely Minor Low LVP1 (see LVR3) Unlikely Minor Low operations experienced from public Initial LVP5 (see LVR3) SP2 (see SR01) residential areas due to the project LVR9 Port, CityLink Port, CityLink and Adverse impacts to views P Initial LVP1 (see LVR3) Likely Minor Low LVP1 (see LVR3) Unlikely Minor Low and city city connections experienced from public Initial LVP5 (see LVR3) LVP4 (see LVR3) connections operations residential areas due to the SP2 (see SR01) project
56 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R LVR10 Port, CityLink Port, CityLink and Adverse impacts to views P Initial LVP1 (see LVR3) Possible Major High LVP1 (see LVR3) Possible Moderate Medium and city city connections experienced from shared Initial LVP2 (see LVR1) LVP4 (see LVR3) connections operations use paths due to the Initial LVP3 (see LVR1) SP2 (see SR01) project Initial LVP4 (see LVR3) Initial LVP5 (see LVR3) LVR11 Port, CityLink Port, CityLink and Adverse impacts to views P Initial LVP1 (see LVR3) Possible Moderate Medium LVP1 (see LVR3) Possible Minor Medium and city city connections experienced from arterial LVP4 (see LVR3) connections operations roads due to the project SP2 (see SR01) Noise and Vibration Construction Risks NVR01 West Gate Site clearance and Noise and surface vibration P Initial NVP4 Likely Major High NVP3 - Construction noise, vibration management, and monitoring Possible Moderate Medium Freeway construction site disturbance at local Prepare and implement a Construction Noise and Prepare and implement a Construction Noise and Vibration Management Plan establishment residential, commercial or Vibration Management Plan (CNVMP) as part of (CNVMP) in accordance with the limits and methodologies outlined in the Noise other sensitive receptors the Construction Environmental Management and Vibration EPRs. due to traffic movements Plan in consultation with affected local Councils The CNVMP must be informed by monitoring and modelling undertaken by a and the operation of plant and EPA Victoria. suitably qualified acoustic and vibration consultant prior to the construction works and machinery during site The CNVMP must meet the surface construction and include (but not be limited to): clearance and construction noise and vibration criteria including: site establishment phase of x Identification of sensitive receptors potentially impacted by the construction works. x Working hours stage of the Project x Night time (if required) and day time x Identification of the scheduling, duration, activities and equipment with the construction noise limits potential to generate airborne noise or surface vibration impacts at the x A noise communications plan for advising identified sensitive receptors and informing the community of work x Implementation of construction noise and surface vibration limits scheduling and working hours x Updated noise and vibration modelling of the noise and vibration impacts x Monitoring and response protocols for x Noise and vibration monitoring commitments and response protocols for managing noise complaints and remedial managing noise complaints and remedial action action x Detail of practicable measures adopted to manage noise and surface vibration x Measurement locations are to be determined impacts that exceed the targets set out in the CNVMP in consultation with local councils and EPA Victoria. x Details of the communication plan to be adopted throughout construction. NVP4 – Construction noise targets 1 Highly Sensitive Areas For Highly Sensitive Areas (based on AS/NZS 2107:2000) implement management actions if construction noise is predicted to or does exceed the internal and external noise levels below, and a noise sensitive receptor is adversely impacted. If construction exceeds the noise levels below: x Consider the duration of construction noise x Consider the existing ambient noise levels x Consult with the owner or operator of the noise sensitive receptor x Consider any specific acoustic requirements of land uses listed below x To determine whether a noise sensitive receptor is adversely impacted.
Construction noise management level, LAeq (15 min) (applies when Land use properties are in use) Classrooms in schools and other Internal noise level 45 dB(A) educational institutions Places of worship Internal noise level 45 dB(A) Active recreation areas characterised External noise level 65 dB(A) by sporting activities and activities which generate their own noise, making them less sensitive to external noise intrusion Passive recreation areas External noise level 60 dB(A) characterised by contemplative activities that generate little noise and where benefits are compromised by external noise intrusion, for example reading, meditation
West Gate Tunnel Project | Environment Effects Statement 57 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Community centres Depends on the intended use of the centre. Refer to the recommended “maximum” internal levels in AS/NZS 2107:2016 for specific uses. Industrial premises External noise level 75 dB(A) Offices, retail outlets External noise level 70 dB(A) 2 Residential dwellings For residential dwellings, implement management actions if construction noise is predicted to or does exceed the noise targets in EPA Victoria Publication 1254 or the daytime management levels specified for noise at residences during recommended standard hours in Part 4.1.1 of the NSW Interim Construction Noise Guidelines (ICNG) with the hours amended to correspond to the EPA Victoria Publication 1254 hours as shown in the table below.
Construction noise management level, LAeq Time of day (15 min) (applies when properties are in use) 7am-6pm Monday to Noise affected Friday Background LA90+10dB 7am-1pm Saturday Source: NSW ICNG Chapter 4.1.1 Table 2, page 12 7am-6pm Monday to Highly noise affected Friday 75d(BA) 7am-1pm Saturday Source: NSW ICNG Chapter 4.1.1 Table 2, page 12 6pm-10pm Monday Noise level at any residential premises not to exceed to Friday background noise by: 1pm-10pm Saturday x 10 dB(A) or more for up to 18 months 7am-10pm Sunday x 5 dB(A) or more after 18 months and public holidays Source: EPA Publication 1254 Section 2 10pm-7am Monday Noise inaudible within a habitable room of any to Sunday residential premises Source: EPA Victoria Publication 1254 Section 2 Notes 1. The noise affected level represents the point above which there may be some community reaction to noise. 2. The highly noise affected level represents the point above which there may be strong community reaction to noise. NVP6 - Construction vibration targets (amenity) Implement management actions if the following guideline target levels for continuous vibration from construction activity to protect human comfort of occupied buildings (including heritage buildings) are not achieved (levels are calculated from the British Standard BS6472-1:2008). Vibration Dose Values (m/s1.75) Type of space Day (7am to 10pm) Night (10pm to 7am) occupancy Preferred Maximum Preferred Maximum Value Value Value Value Residential 0.2 0.4 0.1 0.2 Offices, schools, 0.4 0.8 0.4 0.8 educational institutions, places of worship Workshops 0.8 1.6 0.8 1.6 Notes 1. The Guideline Targets are non-mandatory; they are goals that should be sought to be achieved through the application of practicable mitigation measures. If exceeded then management actions would be required 2. The VDVs may be converted to PPVs within a noise and vibration construction management plan. NVP7 - Construction vibration targets (structures) Construction vibration targets for structures are summarised in the tables below.
58 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Guideline values for the vibration velocity to be used when evaluating the effects of short term vibration on structures. Guideline values for velocity (mm/s) Vibration at the foundation at Vibration at a frequency of horizontal Type of structure 1 to 10 10 to 50 50 to plane of Hz Hz 100 highest floor Hz* All frequencies 1. Buildings used for 20 20 to 40 40 to 40 commercial purposes, 50 industrial buildings, and buildings of similar design 2. Dwellings and buildings 5 5 to 15 15 to 15 of similar design and/or 20 occupancy 3. Structures that, 3 3 to 8 8 to 10 8 because of their particular sensitivity to vibration, cannot be classified under lines 1 and 2 and are of intrinsic value (e.g. Heritage buildings) *At frequencies > 100 Hz, the values given in this column may be used as a minimum Notes: 1. Vibration levels marginally exceeding those vibration levels in the table would not necessarily mean that damage would occur and further investigation would be required to determine if higher vibration levels can be accommodated without risk of damage 2. For civil engineering structures (e.g. with reinforced concrete constructions used as abutments or foundation pads) the values for Type 1 buildings may be increased by a factor of 2 3. Short-term vibration is defined as vibration which does not occur often enough to cause structural fatigue and which does not produce resonance in the structure being evaluated. Guideline values for the vibration velocity to be used when evaluating the effects of long term vibration on structures. Guideline values for velocity (mm/s) Vibration at Type of structure horizontal plane of highest floor All frequencies
Buildings used for commercial purposes, industrial buildings, and buildings of 10 similar design
Dwellings and buildings of similar design 5 and/or occupancy
Structures that, because of their particular sensitivity to vibration, cannot be 2.5 classified under lines 1 and 2 and are of intrinsic value (e.g. Heritage buildings) Notes: 1. Vibration levels marginally exceeding those in the table would not necessarily mean that damage would occur and further investigation would be required to determine if higher vibration levels can be accommodated without risk of damage 2. Limits in the above table may need to be adjusted following a pre-construction condition survey 3. Long-term vibration relates to events that may result in a resonant structural response.
West Gate Tunnel Project | Environment Effects Statement 59 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Implement management actions if, due to construction activity, the DIN 4150.3 Guideline Targets for structural damage to buildings (for short-term vibration or long-term vibration) are not achieved. NVP8 - GroundǦborne (internal) noise targets Implement management actions as determined in consultation with potentially affected land owners to protect amenity at residences where the following ground borne noise guideline targets are exceeded during construction. Time of Day Internal noise level measured at the centre of the most affected habitable room
Evening (6pm to 10pm) LAeq (15 minute) = 40dBA
Night (10pm to 6am) LAeq (15 minute) = 35dBA Notes: 1. Levels are only applicable when ground borne noise levels are higher than airborne noise levels. 2. Management actions include community consultation to determine acceptable level of disruption and provision of respite accommodation in some circumstances. NVP9 – Utility asset protection Prior to construction undertake condition assessments of above and below ground utility assets and establish construction vibration limits in consultation with asset owners to maintain asset integrity. Where construction vibration limits are not agreed with the asset owner, the guideline values in the table below apply. Guideline values for velocity Pipe Material measured on the pipe Steel (including welded pipes) 100 mm/s Clay, concrete, reinforced 80 mm/s concrete, pre stressed concrete, metal (with or without flange) Masonry, plastic 50 mm/s
Notes 1 These values may be reduced by 50% when evaluating the effects of long- term vibration on buried pipework 2 It is assumed pipes have been manufactured and laid using current technology. Monitor vibration limits during construction to demonstrate compliance with agreed vibration limits. Identify contingency measures to be implemented if limits are not met. Where necessary rectify any defects that are attributable to the Project. NVR02 West Gate Earthworks Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium Freeway disturbance at local NVP4 (see NVR01) residential, commercial or NVP6 (see NVR01) other sensitive receptors due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) earthworks phase of works. NVR03 West Gate Relocation of Noise and surface vibration R Initial NVP4 (see NVR01) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low Freeway 220kV power lines disturbance at local NVP4 (see NVR01) and towers, residential, commercial or NVP6 (see NVR01) protection of other other sensitive receptors utilities that may be due to traffic movements NVP7 (see NVR01) impacted and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) relocation of potentially impacted utilities. NVR04 West Gate Construction of Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium Freeway surface roads and disturbance at local NVP4 (see NVR01) other civil residential, commercial or NVP6 (see NVR01) infrastructure works other sensitive receptors due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) construction of surface roads and other civil infrastructure.
60 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R NVR05 West Gate Ancillary Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium Freeway development – disturbance at local NVP4 (see NVR01) noise barriers, residential, commercial or NVP6 (see NVR01) Freeway other sensitive receptors Management due to traffic movements NVP7 (see NVR01) System and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) construction of ancillary infrastructure. NVR09 Tunnels Site clearance and Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium construction site disturbance at local NVP4 (see NVR01) establishment residential, commercial or NVP5 - Blasting trials and assessment other sensitive receptors due to traffic movements Where blasting is proposed, a series of initial trials at reduced scale must be and the operation of plant conducted prior to production blasting to determine site-specific blast response and machinery during site characteristics and to define allowable blast sizes to meet air blast overpressure clearance and construction and ground vibration limits. If blasting is required, an assessment of the potential site establishment phase of noise and vibration impacts, and a strategy to minimise and manage those impacts works. must be prepared, including preparation of an appropriate community information program. NVP6 (see NVR01) NVP7 (see NVR01) NVP8 (see NVR01) NVP9 (see NVR01) NVP10 - Tunnel ventilation system noise design Design and implement the tunnel ventilation system to achieve compliance with State Environment Protection Policy (Control of Noise from Commerce, Industry and Trade) No. N-1 (SEPP N-1) and in accordance with the Works Approval. Provide detailed design to the satisfaction of EPA Victoria prior to commencement of the works permitted by the Works Approval. NVP11 - Tunnel ventilation system noise monitoring Measure noise from the tunnel ventilation system on commencing road operation and monitor noise from the tunnel ventilation system for up to five years post opening of the Freeway, or as agreed with EPA Victoria, to verify compliance with State Environment Protection Policy (Control of Noise from Commerce, Industry and Trade) No. N-1 (SEPP N-1). Identify contingency measures to be implemented if noise level targets are not met. NVP12 - Amenity – Blast Vibration Implement management actions if the following vibration values are not achieved. Blasting activities must comply with Australian Standard AS2187.2-2006, Explosives – Storage and use Part 2 – Use of explosives for all blasting.
Type of blasting Peak component particle velocity Category operations (mm/s)
Sensitive site Operations lasting 5mm/s for 95% blasts per year longer than 12 months or more than 10mm/s maximum unless 20 blasts agreement is reached with the occupier that a higher limit may apply Sensitive site Operations lasting 10mm/s maximum unless less than 12 months agreement is reached with occupier or less than 20 that a higher limit may apply blasts Occupied All blasting 25mm/s maximum value unless non-sensitive agreement is reached with occupier sites such as that a higher limit may apply. For factories and sites containing equipment sensitive commercial to vibration, the vibration should be premises kept below manufacturer’s specification or levels that can be shown to adversely affect the equipment operation Note 1. Sensitive site includes houses and low rise residential buildings, theatres, schools and other similar buildings occupied by people. NVP13 - Amenity – Blast Overpressure Implement management actions if the following overpressure values are not achieved. Blasting activities must comply with Australian Standard AS2187.2-2006,
West Gate Tunnel Project | Environment Effects Statement 61 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Explosives – Storage and use Part 2 – Use of explosives for all blasting. Category Type of blasting Peak Overpressure Value (dBL) operations Sensitive Site Operations lasting 115 dBL for 95% blasts per year. longer than 12 120dBL maximum unless agreement months or more than with occupier that a higher limit may 20 blasts apply Operations lasting 120dBL for 95% blasts per year. 125 less than 12 months dBL maximum unless agreement or less than 20 with occupier that a higher limit may blasts apply Occupied All blasting 125 dBL maximum value unless non-sensitive agreement is reached with occupier sites such as that a higher limit may apply. For factories and sites containing equipment sensitive commercial to vibration, the vibration should be premises kept below manufacturers specification or levels that can be shown to adversely affect the equipment operation Note 1. Sensitive site includes houses and low rise residential buildings, theatres, schools and other similar buildings occupied by people. NVR10 Tunnels North Yarra Main Noise and surface vibration R Initial NVP4 (see NVR01) Unlikely Major Medium NVP3 (see NVR01) Rare Major Medium Sewer realignment disturbance at local NVP4 (see NVR01) and protection of residential, commercial or NVP5 (see NVR09) other utilities other sensitive receptors due to traffic movements NVP6 (see NVR01) and the operation of plant NVP7 (see NVR01) and machinery during the NVP8 (see NVR01) earthworks phase of NVP9 (see NVR01) works. NVP10 (see NVR09) NVP11 (see NVR09) NVP12 (see NVR09) NVP13 (see NVR09) NVR11 Tunnels Dive structure / Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium portal construction disturbance at local NVP4 (see NVR01) residential, commercial or NVP5 (see NVR09) other sensitive receptors due to traffic movements NVP6 (see NVR01) and the operation of plant NVP7 (see NVR01) and machinery NVP8 (see NVR01) NVP9 (see NVR01) NVP10 (see NVR09) NVP11 (see NVR09) NVP12 (see NVR09) NVP13 (see NVR09) NVR12 Tunnels Precast plant Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium construction and disturbance at local NVP4 (see NVR01) manufacturing of residential, commercial or NVP5 (see NVR09) precast units other sensitive receptors due to traffic movements NVP6 (see NVR01) and the operation of plant NVP7 (see NVR01) and machinery during the NVP8 (see NVR01) construction of surface NVP9 (see NVR01) roads and other civil NVP10 (see NVR09) infrastructure. NVP11 (see NVR09) NVP12 (see NVR09) NVP13 (see NVR09)
62 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R NVR15 Port, CityLink Site clearance and Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium and city construction site disturbance at local NVP4 (see NVR01) connections establishment residential, commercial or NVP6 (see NVR01) other sensitive receptors due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery during site NVP9 (see NVR01) clearance and construction site establishment phase of works. NVR16 Port, CityLink Construction of Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium and city bridge over the disturbance at local NVP4 (see NVR01) connections Maribyrnong River residential, commercial or NVP6 (see NVR01) and associated civil other sensitive receptors infrastructure works due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) earthworks phase of works. NVR17 Port, CityLink Dive structure / Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium and city portal construction disturbance at local NVP4 (see NVR01) connections residential, commercial or NVP6 (see NVR01) other sensitive receptors due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery NVP9 (see NVR01) NVR18 Port, CityLink Precast plant Noise and surface vibration P Initial NVP4 (see NVR01) Likely Major High NVP3 (see NVR01) Possible Moderate Medium and city construction and disturbance at local NVP4 (see NVR01) connections manufacturing of residential, commercial or NVP6 (see NVR01) precast units other sensitive receptors due to traffic movements NVP7 (see NVR01) and the operation of plant NVP8 (see NVR01) and machinery during the NVP9 (see NVR01) construction of surface roads and other civil infrastructure. Operation Risks NVR06 West Gate West Gate Noise disturbance at local P Comply with VicRoads Traffic Noise Reduction Possible Major High NVP1 - Traffic noise limits Possible Moderate Medium Freeway Freeway Category A receptors due Policy 2005 and VicRoads Road Design Note Design and construct the works to meet the following limits on traffic noise levels. operations to traffic noise. RDN 6-1 Interpretation and application of VicRoads traffic noise reduction policy 2005. Aspect External Traffic Noise Levels External (a) External traffic noise levels from the freeway* and Local traffic Roads+ at Category A Buildings and Category B Buildings noise facing the traffic noise, being those adjacent to or with a levels direct line of sight to the freeway*, must be no greater than:
(i) 63dB(A) L10(18h) measured between 6am and midnight for Category A Buildings; and
(ii) 63dB(A ) L10(12h) measured between 6am and 6pm for Category B Buildings; and (b) External traffic noise levels from the freeway* and Local Roads+ at Category A Buildings and Category B Buildings which do not fall within paragraph (a) above and which are adjacent to an identified section of Local Road+, must be no greater than the predicted traffic noise level under a ‘no project’ scenario. The ‘no project’ scenario must also assume that the road traffic noise attributable to the West Gate Freeway (without the project) is:
x 63dB(A) L10(18h) measured between 6am and midnight for the relevant Category A Buildings; and
x 63dB(A) L10(12h) measured between 6am and 6pm for the relevant Category B Buildings.
West Gate Tunnel Project | Environment Effects Statement 63 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Applies at The noise criteria in paragraphs (a) and (b) above are to apply to the lowest habitable level of Category A Buildings and Category B Buildings existing and occupied or capable of being occupied at the time of announcing the design on 2 April 2017. In some cases off-site noise attenuation may be required to meet the noise criteria at any Category A or Category B Building. This may include implementation of noise attenuation measures in consultation with the owner of the relevant building to ensure that an equivalent level of attenuation is provided internal to the building. * Freeway means the primary road connecting the West Gate Freeway (from the M80 interchange) with the Port of Melbourne, CityLink and the city to be constructed as a result of the project and excludes: x The sections of the West Gate Freeway east of the Williamstown rail line; and x The sections of the project which comprise widening of arterial roads, but includes: x The Dynon Road eastbound exit ramp and Dynon Road westbound entry ramp to the western abutment of the existing Dynon Road bridge over the railway lines; and x The Wurundjeri Way Extension from Dynon Road to the point at which the elevated section of the road ties into Wurundjeri Way south of Dudley Street. + Local Road means (a) The sections of Grieve Parade, Millers Road, Williamstown Road, Hyde Street, MacKenzie Road, Simcock Avenue and Dynon Road which extend 100 metres from the interchange of the relevant road with the Freeway; and (b) The sections of Footscray Road between the intersection of Footscray Road with the Footscray Road ramps and the Sims Street loop intersection with Footscray Road. NVR07 West Gate West Gate Noise disturbance at local P See NVR06 Possible Moderate Medium NVP1 (see NVR06) Unlikely Minor Low Freeway Freeway Category B receptors due operations to traffic noise NVR08 West Gate Increased traffic Disturbance at local P Consideration of a noise level increases. Possible Moderate Medium NVP2 Unlikely Minor Low Freeway noise on local sensitive receptors due to Traffic noise must be measured prior to and upon opening of the Freeway, in roads traffic noise. accordance with the VicRoads Traffic Noise Measurement Requirements for Acoustic Consultants – September 2011, to verify conformance with the external traffic noise performance requirements set out in NVP1 above. Remedial action must be taken as soon as practicable in the event that the measured traffic noise levels demonstrate that the external traffic noise performance requirements set out in NVP1 are not met. NVR13 Tunnels Noise disturbance Design and implement the R Design and implement the tunnel ventilation Rare Moderate Low NVP10 (see NVR09) Rare Moderate Low at local sensitive tunnel ventilation system to system to achieve compliance with State NVP11 (see NVR09) receptors (as achieve compliance with Environment Protection Policy (Control of Noise
defined in SEPP N- State Environment from Commerce, Industry and Trade) No. N-1 1) associated with Protection Policy (Control (SEPP N-1). Provide detailed design to the noise from of Noise from Commerce, satisfaction of EPA Victoria prior to works ventilation Industry and Trade) No. N- commencing. structures 1 (SEPP N-1). Provide Measure noise from the tunnel ventilation system detailed design to the on commencing road operation and monitor noise satisfaction of EPA Victoria from the tunnel ventilation system for up to five prior to works commencing years post opening or as agreed with EPA Victoria to verify compliance with State Environment Protection Policy (Control of Noise from Commerce, Industry and Trade) No. N-1 (SEPP N-1). Identify contingency measures to be implemented if noise level targets are not met. NVR14 Tunnels Increased noise Noise disturbance at local R Consideration of the change in traffic noise Possible Major High NVP1 (see NVR06) Unlikely Minor Low levels on local sensitive receptors due to impacts. NVP2 (see NVR08) roads traffic noise. NVR19 Port, CityLink Traffic operations Noise disturbance at local P Comply with VicRoads Traffic Noise Reduction Likely Major High NVP1 (see NVR06) Unlikely Minor Low and city Category A receptors due Policy 2005 and VicRoads Road Design Note connections to traffic noise. RDN 6-1 Interpretation and application of VicRoads traffic noise reduction policy 2005. NVR20 Port, CityLink Traffic operations Noise disturbance at local P See NVR06 Possible Moderate Medium NVP1 (see NVR06) Unlikely Minor Low and city Category B receptors due connections to traffic noise.
64 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R NVR21 Port, CityLink Increased traffic Disturbance at local P See NVR08 Possible Moderate Medium NVP2 (see NVR08) Unlikely Minor Low and city noise on local sensitive receptors due to connections roads traffic noise. Social Construction Risks SR01 West Gate Site clearance & Residents feel their R Initial EP1 (see ER01) Possible Minor Medium BP3 (see BR7) Unlikely Minor Low Freeway construction site neighbourhood is less Initial LVP2 (see LVR1) BP4 (see BR1) establishment attractive as a result of Initial S3 EMP2 (see LUPR1) reduced landscape and visual amenity due to site EMP4 (see HR1) clearing. EP1 (see ER01) EP3 (see ER03) LVP2 (see LVR1) SP2 Communications and Community Engagement Plan (CCEP) Develop and implement a Communications and Community Engagement Plan in consultation with affected local councils to engage and consult the community and potentially affected stakeholders and discuss progress of construction activities and operation. The plan must include: x Community issues identification, management and resolution approach and procedures x Enquiry management and record keeping approach and procedures x Approach to mitigating community impacts including dust, noise and light and any relevant policies (e.g. relocations policy) x Approach to changes to transport conditions for affected and potentially affected users, relevant stakeholders and relevant road authorities x How it will evaluate the effectiveness of community impact mitigation measures, including through noise and vibration monitoring x Incident and emergency communications, including notification methods and timeframes in the event of a major incident or overrun x Approach and processes to ensure that the workforce has appropriate community awareness and sensitivity x Any innovative communications tools and methods in the CCEP which would enhance the Project’s ability to effectively communicate with the community and stakeholders x Approach to notifying community, business, road user and other stakeholders affected by construction activities about impacts x The role and function of the Community Liaison Group (CLG) as developed by the State. The CCEP must address matters of interest or concern to the following stakeholders: x Municipalities x Recreation, sporting and community groups x Potentially affected residents and property owners x Potentially affected business x Other public facilities in proximity. SR02 West Gate Site clearance & Outdoor activities are less R Initial AQP6 (see AQR01) Possible Insignificant Low AQP6 (see AQR01) Possible Insignificant Low Freeway construction site enjoyable or activities Initial NVP4 (see VR12) EMP2 (see LUPR1) establishment reduced as a result of dust Initial S3 EMP4 (see HR1) and noise. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SR03 West Gate Site clearance & Reduced amenity and R Initial EP1 (see ER01) Likely Minor Medium EMP2 (see LUPR1) Possible Insignificant Low Freeway construction site recreational value at Initial EP4 (see ER18) EP1 (see ER01) establishment Kororoit Creek, including Initial LVP2 (see LVR1) EP3 (see ER03) GJ Hoskens Reserve, due to vegetation clearing. Initial S3 EP5 (see ER17) LVP2 (see LVR1) SP2 (see SR01)
West Gate Tunnel Project | Environment Effects Statement 65 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR04 West Gate Site clearance & Temporary loss of R Initial LVP2 (see LVR1) Likely Minor Medium EMP2 (see LUPR1) Possible Insignificant Low Freeway construction site community access to the Initial S3 LPP5 (see LUPR1) establishment Lynch Road Reserve SP2 (see SR01) (power line reserve) between Lynch Road and Houston Court, Brooklyn reduces outdoor activities. SR05 West Gate Site clearance & Temporary loss of R Initial LVP2 (see LVR1) Likely Minor Medium EMP2 (see LUPR1) Possible Insignificant Low Freeway construction site community access to the Initial S3 LPP5 (see LUPR1) establishment informal open space east SP2 (see SR01) of Millers Road, Brooklyn reduces outdoor activities (power line reserve). SR37 West Gate Site clearance & Temporary loss of R Unlikely Minor Low BP4 (see BR1) Unlikely Insignificant Low Freeway construction site community access to the EMP2 (see LUPR1) establishment soccer ground carpark in LPP5 (see LUPR1) the corner of McIvor Reserve. SP2 (see SR01) SR38 West Gate Site clearance & Construction compounds Likely Minor Medium AQP6 (see AQR01) Unlikely Insignificant Low Freeway construction site affect amenity of adjacent BP3 (see BR7) establishment residential areas through EMP2 (see LUPR1) visual, noise and air quality issues; people are less EMP4 (see HR1) able to use their private LPP5 (see LUPR1) open space. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SR39 West Gate Site clearance & The informal reserve west Possible Minor Medium AQP6 (see AQR01) Likely Insignificant Low Freeway construction site of Williamstown Road in NVP3 (see NVR01) establishment Yarraville just north of the NVP4 (see NVR01) West Gate Freeway becomes a construction SP2 (see SR01) compound, resulting in loss of open space, noise and air quality issues. SR07 West Gate Construction of Visitors attend Altona R Initial NVP4 (see VR12) Possible Moderate Medium EMP2 (see LUPR1) Possible Moderate Medium Freeway surface roads and Memorial Park less Initial S2 EMP4 (see HR1) other civil because of reduced NVP3 (see NVR01) infrastructure works amenity due to increased noise. NVP4 (see NVR01) SP2 (see SR01) SR08 West Gate Construction of People use WLJ Crofts R Initial LVP2 (see LVR1) Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and Reserve less because Initial NVP4 (see VR12) EMP4 (see HR1) other civil increased noise and visual Initial S2(see SR07) LVP2 (see LVR1) infrastructure works impact make it less attractive or suitable for NVP3 (see NVR01) their activities. SP2 (see SR01) SR09 West Gate Construction of Bright Steps Kindergarten: R Initial NVP4 (see VR12) Possible Minor Medium EMP2 (see LUPR1) Unlikely Minor Low Freeway surface roads and operations are disrupted Initial SP2 EMP4 (see HR1) other civil because of noise; less NVP3 (see NVR01) infrastructure works people have their children attend. NVP4 (see NVR01) SP2 (see SR01) SR10 West Gate Construction of Reduced use of Donald R Initial LVP2 (see LVR1) Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and McLean Reserve due to Initial NVP4 (see VR12) EMP4 (see HR1) other civil large amounts of Initial NVP5 LPP2 (see LUPR2) infrastructure works vegetation clearing, and significant increases in Initial SP3 (see SR01) LVP2 (see LVR1) noise. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01)
66 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR11 West Gate Construction of Donald McLean Reserve: R Initial LVP2 (see LVR1) Likely Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and community cohesion is Initial S3 EMP4 (see HR1) other civil reduced as less people LVP2 (see LVR1) infrastructure works meet at the reserve for sports and recreational SP2 (see SR01) activities because of changes to access and functionality. This includes: temporary land occupation; some property acquisition; removing the cricket nets; temporarily removing the playground; and loss of passive recreational space. SR12 West Gate Construction of Emma McLean R Initial NVP4 (see VR12) Possible Minor Medium EMP2 (see LUPR1) Unlikely Minor Low Freeway surface roads and Kindergarten: operations Initial S2 EMP4 (see HR1) other civil are disrupted because of NVP3 (see NVR01) infrastructure works noise; less people have their children attend. NVP4 (see NVR01) SP2 (see SR01) SR13 West Gate Construction of McIvor Reserve, including R Initial LP1 Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and Footscray Hockey Club: Initial LVP2 (see LVR1) EMP4 (see HR1) other civil reduced use of facilities Initial NVP4 (see VR12) LPP5 (see LUPR1) infrastructure works due to decreased parking, increased noise and visual Initial S3 LVP2 (see LVR1) impact. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SR14 West Gate Construction of Residents in Fogarty R Initial TP3 (see TR1) Possible Minor Medium EMP2 (see LUPR1) Possible Insignificant Low Freeway surface roads and Avenue affected by Initial S3 EMP4 (see HR1) other civil construction activity and LPP5 (see LUPR1) infrastructure works traffic; impacts on community cohesion, LVP2 (see LVR1) outdoor activities. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) TP3 (see TR1) SR15 West Gate Construction of Hyde Street Reserve used R Initial LP1 Possible Minor Medium EMP2 (see LUPR1) Possible Insignificant Low Freeway surface roads and less due to vegetation, tree Initial LVP2 (see LVR1) EMP4 (see HR1) other civil clearing and noise. Initial NVP4 (see VR12) EP1 (see ER01) infrastructure works Initial S3 LPP5 (see LUPR1) LVP2 (see LVR1) NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SR16 West Gate Construction of Impediments to R Initial TP3 (see TR1) Unlikely Moderate Medium EMP4 (see HR1) Unlikely Insignificant Low Freeway surface roads and connectivity leading to Initial S3 TP1 (see TR28) other civil lower participation in TP3 (see TR1) infrastructure works community activities due to changes to traffic SP2 (see SR01) conditions. SR17 West Gate Construction of Cyclists and pedestrians R Initial TP3 (see TR1) Possible Minor Medium EMP4 (see HR1) Unlikely Minor Low Freeway surface roads and feel less safe and reduce Initial S3 TP1 (see TR28) other civil their activity on local roads TP3 (see TR1) infrastructure works because of extra traffic. SP2 (see SR01) SR18 West Gate Construction of Pedestrian and bicycle R Initial TP3 (see TR1) Almost Moderate High EMP4 (see HR1) Almost Moderate High Freeway surface roads and movements are reduced Initial S3 certain TP1 (see TR28) certain other civil because of diversion or TP3 (see TR1) infrastructure works closure along the Federation Trail. SP2 (see SR01) SR19 West Gate Construction of Pedestrian and bicycle R Initial TP3 (see TR1) Possible Insignificant Low TP1 (see TR28) Unlikely Insignificant Low Freeway surface roads and movements on the Initial S3 TP3 (see TR1) other civil pedestrian bridges over the TP7 (see TR2) infrastructure works West Gate Freeway are reduced because of works. SP2 (see SR01)
West Gate Tunnel Project | Environment Effects Statement 67 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR20 West Gate Construction of Disruption to daily lives R Initial T4 (see TR5) Possible Minor Medium EMP4 (see HR1) Unlikely Insignificant Low Freeway surface roads and due to extended bus travel Initial S2 TP1 (see TR28) other civil times to local destinations. TP4 (see TR5) infrastructure works SP2 (see SR01) SR21 West Gate Construction of Residents living alongside R Initial BP3 (see BR7) Possible Minor Medium BP3 (see BR7) Possible Insignificant Low Freeway surface roads and construction activities feel Initial LVP2 (see LVR1) EMP4 (see HR1) other civil their neighbourhood is less Initial S3 SP2 (see SR01) infrastructure works attractive because of reduced visual amenity. SR22 West Gate Construction of Night time construction in R Initial NVP4 (see VR12) Possible Moderate Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and Altona North, Brooklyn, Initial NVP5 EMP4 (see HR1) other civil Spotswood, South Initial S3 NVP3 (see NVR01) infrastructure works Kingsville and Yarraville affects residents, usual NVP4 (see NVR01) activities like watching SP2 (see SR01) television disrupted. In some cases, sleep disturbance due to noise and vibration. SR23 West Gate Construction of Golfers use the Westgate R Initial NVP4 (see VR12) Possible Moderate Medium EMP2 (see LUPR1) Unlikely Insignificant Low Freeway surface roads and Golf Course less because Initial NVP5 EMP4 (see HR1) other civil of visual impacts and Initial S3 LVP2 (see LVR1) infrastructure works increased in noise. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SR86 West Gate Construction of Historic sites are disturbed R Initial CH2 (see HHR01) Possible Minor Medium CHP2 (see HHR01) Possible Insignificant Low Freeway surface roads and during construction, Initial CH3 (see HHR02) CHP3 (see HHR02) other civil impacting on sense of Initial CH5 CHP5 (see HHR04) infrastructure works community. CHP7 (see HHR04) CHP8 (see HHR12) CHP9 (see HHR24) CHP11 (see HHR26) SP2 (see SR01) SP3 Community Liaison Group participation Participate in the Community Liaison Group (CLG) that has been established by the State to facilitate community and stakeholder involvement for the construction phase of the Project. Participation must include: x Attendance at meetings x Regular reporting of design and construction activities x Timely provision of relevant information, including response to issues raised by the group x Regular reporting and monitoring of impacts and discussion of mitigation measures and their effectiveness. SR44 Tunnels Site clearance & Yarraville Gardens: People R Initial BP3 (see BR7) Possible Minor Medium BP3 (see BR7) Possible Insignificant Low construction site use the park less for active Initial BP4 (see BR1) BP4 (see BR1) establishment and passive recreation Initial EP1 (see ER01) EMP2 (see LUPR1) because of reduced amenity due to visual Initial LVP2 (see LVR1) EMP4 (see HR1) impacts of adjacent site Initial S3 EP1 (see ER01) compound. EP3 (see ER03) LVP2 (see LVR1) SP2 (see SR01) SR46 Tunnels Dive structure, Yarraville Gardens and R Initial NVP4 (see VR12) Possible Minor Medium EMP4 (see HR1) Possible Insignificant Low portal construction Hanmer Reserve: Reduced Initial S3 NVP3 (see NVR01) amenity leading to reduced NVP4 (see NVR01) use of facilities at due to a significant increase in SP2 (see SR01) noise. SP3 (see SR86)
68 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR52 Tunnels Dive structure, Southern portal: Daily life R Initial NVP4 (see VR12) Likely insignificant Low EMP4 (see HR1) Unlikely Insignificant Low portal construction is disrupted in residential Initial NVP5 NVP3 (see NVR01) areas in Spotswood and Initial NVP8 NVP4 (see NVR01) Kingsville due to noise and vibration resulting from Initial NVP10 (see VR1) NVP5 (see NVR09) southern portal works. Initial S3 NVP6 (see NVR01) Initial S4 NVP7 (see NVR01) NVP12 (see NVR09) NVP13 (see NVR09) SP2 (see SR01) SP3 (see SR86) SR45 Tunnels Tunnelling activities Yarraville Gardens: People R Initial NVP4 (see VR12) Possible Minor Medium EMP4 (see HR1) Unlikely Insignificant Low use the park less for active Initial S3 NVP3 (see NVR01) and passive recreation NVP4 (see NVR01) because of vibration in some parts of the gardens. SP2 (see SR01) SP3 (see SR86) SR62 Tunnels Tunnelling activities Historic sites are disturbed R Initial CH2 (see HHR01) Possible Minor Medium CHP2 (see HHR01) Possible Insignificant Low during construction, Initial CH3 (see HHR02) CHP3 (see HHR02) impacting on sense of Initial CH5 (see SR37) CHP5 (see HHR04) community. CHP7 (see HHR04) CHP8 (see HHR12) CHP9 (see HHR24) CHP11 (see HHR26) SP2 (see SR01) SP3 (see SR86) SR54 Tunnels Tunnelling activities Norfolk Street childcare: R Initial NVP4 (see VR12) Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low operations are disrupted Initial SP2 (see SR07) EMP4 (see HR1) because of noise; less NVP3 (see NVR01) people have their children attend. NVP4 (see NVR01) SP2 (see SR01) SR47 Tunnels Tunnelling activities Reduced amenity including R Initial AQP6 (see AQR01) Unlikely Insignificant Low AQP6 (see AQR01) Unlikely Insignificant Low restricted outdoor activities Initial S3 EMP2 (see LUPR1) in residential areas in close Initial S4 EMP4 (see HR1) to construction sites due to dust and odour emissions. NVP3 (see NVR01) NVP4 (see NVR01) SP2 (see SR01) SP3 (see SR86) SR48 Tunnels Tunnelling activities Additional construction R Initial S2 Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low traffic increases travel time Initial S3 EMP4 (see HR1) potentially reducing time to Initial TP3 (see TR1) SP2 (see SR01) participate in family or recreational activities. SP3 (see SR86) TP1 (see TR28) TP3 (see TR1) SR49 Tunnels Tunnelling activities Local traffic, pedestrians R Initial S2 Possible Minor Medium EMP2 (see LUPR1) Unlikely Moderate Low and cyclists feel less safe Initial S3 EMP4 (see HR1) due to increased heavy Initial TP3 (see TR1) SP2 (see SR01) vehicle traffic; don’t travel on certain roads or at SP3 (see SR86) certain times, impeding TP1 (see TR28) their participation in clubs TP3 (see TR1) or recreation. SR50 Tunnels Tunnelling activities People are unsettled or R Initial NVP4 (see VR12) Likely Minor Medium EMP4 (see HR1) Possible insignificant Low unwell because of Initial NVP5 NVP3 (see NVR01) perceptible vibration in Initial NVP8 NVP4 (see NVR01) residential areas above tunnel locations and near Initial NVP10 (see VR1) NVP5 (see NVR09) portals. Initial S3 NVP6 (see NVR01) Initial S4 NVP7 (see NVR01) NVP12 (see NVR09) NVP13 (see NVR09) SP2 (see SR01) SP3 (see SR86)
West Gate Tunnel Project | Environment Effects Statement 69 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR51 Tunnels Tunnelling activities People are unsettled or R Initial NVP4 (see VR12) Likely insignificant Low EMP4 (see HR1) Possible insignificant Low unwell because of Initial NVP5 NVP3 (see NVR01) regenerated noise in Initial NVP8 NVP4 (see NVR01) residential areas above tunnel locations and near Initial NVP10 (see VR1) NVP5 (see NVR09) portals. Initial S3 NVP6 (see NVR01) Initial S4 NVP7 (see NVR01) NVP12 (see NVR09) NVP13 (see NVR09) SP2 (see SR01) SP3 (see SR86) SR63 Tunnels Tunnelling activities Displacement of residents R Initial NVP4 (see VR12) Likely insignificant Low EMP4 (see HR1) Possible Insignificant Low due to tunnelling vibration Initial NVP5 NVP3 (see NVR01) and regenerated noise. Initial NVP8 NVP4 (see NVR01) Initial NVP10 (see VR1) NVP5 (see NVR09) Initial S3 NVP6 (see NVR01) Initial S4 NVP7 (see NVR01) NVP12 (see NVR09) NVP13 (see NVR09) SP2 (see SR01) SP3 (see SR86) SR65 Port, CityLink Construction of the Reduced landscape and Initial EP1 (see ER01) Possible Minor Medium EMP2 (see LUPR1) Unlikely Insignificant Low and city new city visual amenity due to Initial LVP2 (see LVR1) EMP4 (see HR1) connections connections and vegetation clearing. Initial S3 EP1 (see ER01) associated civil infrastructure works EP3 (see ER03) LVP2 (see LVR1) SP2 (see SR01) SR66 Port, CityLink Construction of the Residential areas close to Initial AQP6 (see AQR01) Unlikely Minor Low AQP6 (see AQR01) Unlikely Minor Low and city new city construction sites: reduced Initial S3 EMP2 (see LUPR1) connections connections and amenity including restricted EMP4 (see HR1) associated civil outdoor activities due to infrastructure works dust and odour. SP2 (see SR01) SR67 Port, CityLink Construction of the Traffic delays on Footscray Initial TP3 (see TR1) Unlikely Minor Low EMP4 (see HR1) Unlikely Insignificant Low and city new city Road and Dynon road. Initial S3 TP1 (see TR28) connections connections and Impediments to TP3 (see TR1) associated civil connectivity for infrastructure works commuters. SP2 (see SR01) SR68 Port, CityLink Construction of the Traffic diversions. Initial TP3 (see TR1) Unlikely Minor Low EMP4 (see HR1) Unlikely Insignificant Low and city new city Impediments to Initial S3 TP1 (see TR28) connections connections and connectivity leading to TP3 (see TR1) associated civil lower participation in infrastructure works community activities. SP2 (see SR01) SR69 Port, CityLink Construction of the Cyclists and pedestrians Initial TP3 (see TR1) Possible Insignificant Low EMP4 (see HR1) Unlikely Insignificant Low and city new city may use shared paths Initial S3 TP1 (see TR28) connections connections and along Footscray Road and TP3 (see TR1) associated civil Moonee Ponds Creek less. infrastructure works Perceived safety risks or SP2 (see SR01) inconvenience of diversions impede access to daily activities. SR70 Port, CityLink Construction of the People using Grimes Initial LP1 Possible Minor Medium EMP2 (see LUPR1) Unlikely Minor Low and city new city Reserve, Tannery Reserve Initial LVP2 (see LVR1) EMP4 (see HR1) connections connections and and Maribyrnong River and Initial NVP4 (see VR12) LPP5 (see LUPR1) associated civil Moonee Ponds Creek infrastructure works open spaces may be Initial S3 LVP2 (see LVR1) discouraged from activities NVP3 (see NVR01) due to noise and visual SP2 (see SR01) impacts. SR71 Port, CityLink Construction of the Residents feel their Initial LVP2 (see LVR1) Possible Insignificant Low EMP4 (see HR1) Possible Insignificant Low and city new city neighbourhood is less Initial S3 SP2 (see SR01) connections connections and attractive because of associated civil reduced visual amenity. infrastructure works
70 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR72 Port, CityLink Construction of the Daily life and community Initial NVP4 (see VR12) Possible Minor Medium EMP2 (see LUPR1) Possible Insignificant Low and city new city cohesion is affected Initial S2 EMP4 (see HR1) connections connections and because of effects of noise NVP3 (see NVR01) associated civil and vibration impacts infrastructure works resulting from construction SP2 (see SR01) activities in x In Levien Lane, Footscray (noise) x West Melbourne near Railway Place (noise and vibration). SR73 Port, CityLink Construction of the Potential for cosmetic Initial BP1 (see BR2) Possible Insignificant Low BP1 (see BR2) Possible Insignificant Low and city new city damage to residential Initial NVP4 (see VR12) NVP3 (see NVR01) connections connections and properties less than 30 Initial NVP5 SP2 (see SR01) associated civil metres from local road infrastructure works works. Initial S3 SR74 Port, CityLink Construction of the Construction work for new Initial BP3 (see BR7) Possible Minor Medium BP3 (see BR7) Unlikely Minor Low and city new city bridges over the Initial BP4 (see BR1) BP4 (see BR1) connections connections and Maribyrnong River may Initial EP1 (see ER01) EMP2 (see LUPR1) associated civil have an impact on river infrastructure works traffic. This could Initial LVP2 (see LVR1) EMP4 (see HR1) discourage use of the river Initial S3 LVP2 (see LVR1) by recreational and SP2 (see SR01) commercial users. SR75 Port, CityLink Construction of the People using Miller Street Initial LP1 Possible Minor Medium EMP2 (see LUPR1) Unlikely Minor Low and city new city Reserve open space may Initial LVP2 (see LVR1) EMP4 (see HR1) connections connections and be discouraged from Initial NVP4 (see VR12) LPP5 (see LUPR1) associated civil activities due to noise and infrastructure works visual impacts. Initial S3 LVP2 (see LVR1) NVP3 (see NVR01) SP2 (see SR01) SR76 Port, CityLink Construction of the Historic sites are disturbed Initial CH2 (see HHR01) Possible Minor Medium CHP2 (see HHR01) Possible Insignificant Low and city new city during construction, Initial CH3 (see HHR02) CHP3 (see HHR02) connections connections and impacting on sense of Initial CH5 CHP5 (see HHR04) associated civil community. infrastructure works CHP7 (see HHR04) CHP8 (see HHR12) CHP9 (see HHR24) CHP11 (see HHR26) SP2 (see SR01) SP3 (see SR86) Operation Risks SR24 West Gate Roadway operation Noise from increased R Initial NVP1 Likely Minor Medium NVP1 (see NVR06) Possible Insignificant Low Freeway traffic volumes means Initial NVP3 NVP2 (see NVR08) people feel their homes Initial S3 SP2 (see SR01) and neighbourhood are less comfortable especially Initial TP2 (see TR10) TP2 (see TR10) outdoor areas. SR25 West Gate Roadway operation Changes in air quality R Initial AQP4 (see AQR28) Possible Moderate Medium AQP4 (see AQR28) Possible Insignificant Low Freeway resulting from increased Initial S3 SP2 (see SR01) traffic volumes means people feel their neighbourhood is less attractive. SR26 West Gate Roadway operation Community cohesion R Initial TP2 (see TR10) Unlikely Insignificant Low SP2 (see SR01) Unlikely Insignificant Low Freeway affected by increased Initial S3 TP2 (see TR10) travel times for local community members travelling northbound on Hyde Street in PM peak to undertake daily activities. SR27 West Gate West Gate Reduced amenity for users R Initial S3 Unlikely Insignificant Low SP2 (see SR01) Unlikely Insignificant Low Freeway Freeway of Altona Memorial Park operations due to visual impacts of new road infrastructure.
West Gate Tunnel Project | Environment Effects Statement 71 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR28 West Gate West Gate Permanent loss of public R Initial S3 Unlikely Insignificant Low SP2 (see SR01) Unlikely Insignificant Low Freeway Freeway open space along northern operations border of WLJ Crofts Reserve leads to less passive or active recreation. SR29 West Gate West Gate Residents adjacent to the R Initial LP1 Possible Moderate Medium LPP1 (see LUPR2) Possible Moderate Medium Freeway Freeway freeway: use of outdoor Initial LV1 (see LVR3) LVP1 (see LVR3) operations space is reduced, and Initial S1 SP1 Urban design principles and vision people feel the neighbourhood is less Initial S3 Detailed design to protect and, where practicable, improve access to and amenity attractive because of visual Initial S4 for potentially affected residents, open space, social and community infrastructure and commercial facilities by responding to the urban design principles and vision elements such as higher noise barriers, elevated and implementing the principles of Crime Prevention Through Environmental structures and less Design. vegetation. SP2 (see SR01)
SR30 West Gate West Gate Users of the cricket nets at R Initial LV1 (see LVR3) Possible Minor Medium LPP2 (see LUPR2) Unlikely Minor Low Freeway Freeway Donald McLean Reserve Initial S1 SP1 (see SR29) operations do not come to the reserve Initial S3 SP2 (see SR01) due to acquisition of that strip of land. Initial S4
SR31 West Gate West Gate Reserve users are R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low Freeway Freeway discouraged from using the Initial LV1 (see LVR3) EP6 (see ER03) operations facilities at Donald McLean Initial S3 LVP1 (see LVR3) Reserve due to vegetation removal which would SP2 (see SR01) permanently change the landscape setting. SR32 West Gate West Gate Reserve users are R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low Freeway Freeway discouraged from using Initial LV1 (see LVR3) EP6 (see ER03) operations Hyde Street Reserve due Initial S3 LVP1 (see LVR3) to landscape and visual impacts. SP2 (see SR01) SR33 West Gate West Gate Visual and noise impacts R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Unlikely Minor Low Freeway Freeway at McIvor Reserve causes Initial LV1 (see LVR3) EP6 (see ER03) operations less use of facilities. Initial S3 NVP1 (see NVR06) NVP2 (see NVR08) LVP1 (see LVR3) SP2 (see SR01) SR34 West Gate West Gate Changed conditions R Initial LV1 (see LVR3) Possible Minor Medium LVP1 (see LVR3) Unlikely Minor Low Freeway Freeway (visual, road configuration) Initial S3 SP2 (see SR01) operations cause residents of Fogarty Initial S4 TP1 (seeTR28) Avenue to feel the area is less attractive. Initial TP1 (see TR28) SR35 West Gate West Gate Impediments to R Initial TP1 (see TR28) Likely Major High TP1 (seeTR28) Likely Major High Freeway Freeway connectivity due to Initial TP2 (see TR10) TP2 (see TR10) operations increased travel times and Initial S3 SP2 (see SR01) increased traffic on Millers Road. SR36 West Gate West Gate Altona Memorial Park: R Initial NVP1 Possible Moderate Medium NVP1 (see NVR06) Possible Moderate Medium Freeway Freeway freeway noise audible in Initial NVP3 NVP2 (see NVR08) operations the chapel, causes less Initial S3 SP2 (see SR01) use. TP1 (seeTR28) SR87 West Gate West Gate Impediments to R Initial TP1 (see TR28) Likely Major High TP1 (seeTR28) Likely Major High Freeway Freeway connectivity due to Initial TP2 (see TR10) TP2 (see TR10) operations increased travel times and Initial S3 SP2 (see SR01) increased traffic on Williamstown Road
72 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR55 Tunnels Ancillary Residents feel their R Initial LP1 EP3 (see ER03) development neighbourhood is less Initial LV1 (see LVR3) EP6 (see ER03) attractive because of Initial S1 LPP1 (see LUPR2) reduced visual amenity due to project elements: Initial S3 Possible Moderate Medium LVP1 (see LVR3) Possible Moderate Medium portals and ventilation Initial S4 SP1 (see SR29) structures. SP2 (see SR01) SP3 (see SR86) SR56 Tunnels Ancillary Northern portal: residents R Initial NVP1 Rare Minor Low NVP2 (see NVR08) Rare Minor Low development close to operational Initial NVP3 NVP9 (see NVR01) facilities (ventilation Initial NVP16 NVP10 (see NVR09) systems) are less able to use outside areas or are Initial S3 NVP11 (see NVR09) otherwise affected due to Initial TP2 (see TR10) SP2 (see SR01) noise impacts. TP2 (see TR10) SR57 Tunnels Ancillary Southern portal: residents R Initial NVP1 Rare Minor Low NVP2 (see NVR08) Rare Minor Low development close to operational Initial NVP3 NVP9 (see NVR01) facilities (ventilation Initial NVP16 NVP10 (see NVR09) systems) are less able to use outside areas or are Initial S3 NVP11 (see NVR09) otherwise affected due to Initial TP2 (see TR10) SP2 (see SR01) noise impacts. TP2 (see TR10) SR58 Tunnels Ancillary Northern portal: reduced R Initial AQP4 (see AQR28) Rare Minor Low AQP4 (see AQR28) Rare Minor Low development amenity for residential Initial S3 SP2 (see SR01) areas located close to Initial TP2 (see TR10) TP2 (see TR10) operational facilities (e.g. ventilation structures) due to air quality impacts. SR59 Tunnels Ancillary Southern portal: Reduced R Initial AQP4 (see AQR28) Rare Minor Low AQP4 (see AQR28) Rare Minor Low development amenity for residential Initial S3 SP2 (see SR01) areas located close to Initial TP2 (see TR10) TP2 (see TR10) operational facilities (e.g. ventilation structures) due to air quality impacts. SR60 Tunnels Tunnel traffic Moore Street Footscray: R Initial S3 Unlikely Insignifica Low TP1 (seeTR28) Unlikely Insignifica Low operations increases in traffic, Initial TP2 (see TR10) nt TP2 (see TR10) nt impacting on travel times SP2 (see SR01) for road users and local residents. Community cohesion affected: feel their neighbourhood is less valuable and outdoor activities less viable. SR61 Tunnels Tunnel traffic Increased truck volumes in R Initial NVP3 Likely Major High AQP4 (see AQR28) Unlikely Minor Low operations Footscray on Moore Street Initial TP2 (see TR10) NVP2 (see NVR08) and Buckley Street creates Initial S3 SP2 (see SR01) a busier, noisier environment, decreases air TP1 (seeTR28) quality, safety and amenity TP2 (see TR10) for residents, pedestrians and cyclists: feel their neighbourhood is less valuable and outdoor activities less viable. SR80 Port CityLink Port, city and Reduced amenity and R Initial LP1 Possible Moderate Medium LPP1 (see LUPR2) Unlikely Minor Low and city CityLink traffic recreational value at Initial LV1 (see LVR3) LVP1 (see LVR3) connections operations Grimes Reserve, Tannery Initial S1 SP1 (see SR29) Reserve and Maribyrnong River and Moonee Ponds Initial S3 SP2 (see SR01) linear open spaces due to Initial S4 visual impacts. People use the facilities less. SR81 Port CityLink Port, city and Reduced visual amenity for R Initial LP1 Possible Moderate Medium LPP1 (see LUPR2) Rare Moderate Low and city CityLink traffic residences in West Initial LV1 (see LVR3) LVP1 (see LVR3) connections operations Melbourne (Railway Place) Initial S1 SP1 (see SR29) due to project elements e.g. views of elevated Initial S3 SP2 (see SR01) structures causes people Initial S4 to value the neighbourhood less.
West Gate Tunnel Project | Environment Effects Statement 73 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SR82 Port CityLink Port, city and Reduced amenity including R Initial NVP1 Likely Minor Medium NVP1 (see NVR06) Possible Insignificant Low and city CityLink traffic less outdoor activities and Initial NVP3 NVP2 (see NVR08) connections operations valuing the neighbourhood Initial S3 SP2 (see SR01) less for residences in West Melbourne (Railway Place) Initial TP2 (see TR10) TP2 (see TR10) and Docklands due to noise from increased traffic volumes. SR83 Port CityLink Port, city and Reduced amenity in R Initial AQP4 (see AQR28) Possible Moderate Medium AQP4 (see AQR28) Possible Insignificant Low and city CityLink traffic residential areas adjacent Initial S3 SP2 (see SR01) connections operations to the alignment due to changes in air quality resulting from increased traffic volumes. SR84 Port CityLink Port, city and People use and value the R Initial EP1 (see ER01) Possible Minor Medium EP1 (see ER01) Possible Insignificant Low and city CityLink traffic Maribyrnong River and Initial LV1 (see LVR3) EP6 (see ER03) connections operations Moonee Ponds Creek Initial S3 LPP1 (see LUPR2) open spaces less due to visual impacts of increased LVP1 (see LVR3) overhead structures and SP2 (see SR01) vegetation changes. SR85 Port CityLink Port, city and Reduced amenity and R Initial LP1 Possible Moderate Medium LPP1 (see LUPR2) Possible Insignificant Low and city CityLink traffic recreational value at Miller Initial LV1 (see LVR3) LVP1 (see LVR3) connections operations Street Reserve due to Initial S1 SP1 (see SR29) visual impacts. People use the facilities less. Initial S3 SP2 (see SR01) Initial S4 Surface Water Construction Risks SWR1 West Gate Site clearance & Diversion or obstruction of R Initial SW7 Ensure that best practice sediment Unlikely Minor Low SWP7 - Surface Water Management during construction Unlikely Minor Low Freeway construction site stormwater flow paths as a and erosion control measures and appropriate The CEMP must include Surface Water Management requirements and methods establishment result of site clearance and handling of construction materials are specified in for: construction site the Construction Environmental Management establishment, causing Plan. x Best practice sediment and erosion control and monitoring, in accordance with EPA Victoria publications 275 (1991), 480 (1996), and 960 (2004) increased inundation of Initial SWP12 Permanent and associated surrounding properties. temporary construction works must not increase x Maintenance of existing flow paths, drainage lines and floodplain storage flood levels that result in an additional flood risk x Location and bunding of any contaminated material (including tunnel spoil and associated with Stony Creek, Kororoit Creek, stockpiled soil) to the 1% AEP flood level and to the satisfaction of EPA Maribyrnong River and Moonee Ponds Creek to Victoria and the relevant drainage authority the requirements and satisfaction of Melbourne A flood emergency management plan including consideration of scheduling Water and in consultation with any other relevant x works drainage authority. Undertake modelling of the design of permanent x Bunding of the tunnel portals to an appropriate level during the and temporary works to demonstrate the resultant construction phase. flood levels and risk profile to requirements and SWP11 - Flood levels, flows and velocities satisfaction of Melbourne Water and in Permanent works and associated temporary construction works must not increase consultation with any other relevant drainage flood risk (considering flood levels, flows and velocities) associated with overland authority. flow paths to the requirements and satisfaction of Melbourne Water and in Consider potential effects of climate change and consultation with any other relevant drainage authority. sea level rise of 0.8 metres by 2100, with and Undertake modelling of the design of permanent and temporary works to without the Works for both existing and proposed demonstrate the resultant flood levels and risk profile to the requirements and scenarios (for example future redevelopment in satisfaction of Melbourne Water and in consultation with any other relevant relation to Moonee Ponds Creek within the Arden drainage authority. – Macaulay Structure Plan area) in consultation with local councils Consider potential effects of climate change and sea level rise of 0.8m by 2100, with and without the works for both existing and proposed scenarios (for example Ensure that surface water from the West Gate future redevelopment in relation to Moonee Ponds Creek within the Arden – Tunnel Project does not encroach into Macaulay Structure Plan area) in consultation with local councils underground SP AusNet electricity or gas assets. Ensure that surface water from West Gate Tunnel Project does not encroach into underground SP AusNet electricity or gas assets. SWP12 - Floodplain storage capacity Maintain existing floodplain storage capacity for overland flow paths potentially impacted by the Project in consultation with Melbourne Water and any other relevant drainage authority. SWR2 West Gate Earthworks Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway stormwater flow paths as a Initial SWP12 (see SWR1) SWP11 (see SWR1) result of earthworks, SWP12 (see SWR1) causing increased inundation of surrounding properties.
74 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR3 West Gate Relocation of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway 220kV power lines stormwater flow paths as a Initial SWP12 (see SWR1) SWP11 (see SWR1) and towers, result of site works for the SWP12 (see SWR1) protection of other relocation of the 220kV utilities that may be power line and towers, impacted causing increased inundation of surrounding properties. SWR4 West Gate Relocation of 66kV Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low Freeway power lines and flow paths in Stony Creek Initial SWP12 (see SWR1) SWP11 (see SWR1) towers, protection during underground SWP12 (see SWR1) of other utilities that relocation of 66kV power may be impacted lines, causing increased inundation of surrounding properties. SWR5 West Gate Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Rare Minor Low Freeway surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing increased inundation of properties surrounding Kayes Drain, Humes Main Drain or Cherrys Main Drain. SWR6 West Gate Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low Freeway surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing increased inundation of properties surrounding Burgess Street Main Drain. SWR7 West Gate Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low Freeway surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing increased inundation of properties surrounding Schutts Estate Main Drain. SWR8 West Gate Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low Freeway surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing increased inundation of properties surrounding Stony Creek near Williamstown Road. SWR9 West Gate Construction of Diversion or obstruction of R Initial SW7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway bridge over stormwater flow paths Initial SW11 Ensure permanent and associated SWP11 (see SWR1) Kororoit Creek and during construction of temporary works do not increase flow velocities in SWP12 (see SWR1) associated civil surface roads and other Maribyrnong River, Kororoit Creek, Stony Creek infrastructure works civil infrastructure works, or Moonee Ponds Creek that would potentially causing increased affect the stability or safety of property, structures inundation of properties or assets including flood levees and/or result in surrounding Kororoit erosion during operation or construction, to the Creek. requirements and satisfaction of Melbourne Water. Initial SW12 (see SWR1)
West Gate Tunnel Project | Environment Effects Statement 75 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR10 West Gate Construction of Diversion or obstruction of R Initial SW7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low Freeway bridge over Stony stormwater flow paths Initial SW11 (see SWR9) SWP11 (see SWR1) Creek and during construction of Initial SW12 (see SWR1) SWP12 (see SWR1) associated civil surface roads and other infrastructure works civil infrastructure works, causing increased inundation of properties surrounding Stony Creek near Hyde Street Reserve. SWR11 West Gate Dive structure / Diversion or obstruction of R Initial SW7 (see SWR1) Rare Minor Low SWP7 (see SWR1) Rare Minor Low Freeway portal construction stormwater flow paths as a Initial SW12 (see SWR1) SWP11 (see SWR1) result of construction of the Initial SW13 Maintain existing floodplain storage SWP12 (see SWR1) southern tunnel dive capacity potentially impacted by the project in structures/portals, causing consultation with Melbourne Water and any other increased inundation of relevant drainage authority to ensure no increase properties surrounding in flood level or frequency during construction or Stony Creek near operation of the West Gate Tunnel Project and Williamstown Road. ancillary works. SWR12 West Gate Site clearance & Pollutants in soil becoming R Initial SW1 Meet State Environment Protection Unlikely Minor Low SWP1 - Design of discharges and runoff Unlikely Minor Low Freeway construction site mobilised in stormwater as Policy (Waters of Victoria) for discharge and run- Meet State Environment Protection Policy (Waters of Victoria) for discharge and establishment a result of site clearance off from the project to the Stony Creek, run-off from the Project to Kororoit Creek, Stony Creek, Maribyrnong River, and construction site Maribyrnong River, Kororoit Creek, Moonee Moonee Ponds Creek. establishment, causing Ponds Creek and Yarra River. SWP4 - Water quality monitoring adverse impacts on Initial SW4 Develop and implement a monitoring Develop and implement a baseline surface water monitoring program prior to waterway health. program for run-off from the project to assess commencement of construction to assess background water quality in all receiving compliance with water quality objectives in waters. This should be developed in consultation with the EPA Victoria and consultation with the relevant drainage authority Melbourne Water. and take appropriate remedial action if water quality objectives are not met. SWP7 (see SWR1) Initial SW7 (see SWR1) SWR13 West Gate Site clearance & Flood event during site R Initial SW6 Minimise chemical and fuel storage Unlikely Minor Low SWP6 - Management of chemicals, fuels, and hazardous materials Unlikely Minor Low Freeway construction site clearance and construction on site and store hazardous materials and Minimise chemical and fuel storage on site and store hazardous materials and establishment site establishment causing dangerous goods in accordance with the relevant dangerous goods in accordance with the relevant guidelines and requirements. inundation of machinery, guidelines and requirements. Comply with the Comply with the Victorian WorkCover Authority and Australian Standard AS1940 and release of fuels into Victorian WorkCover Authority and Australian Storage Handling of Flammable and Combustible Liquids and EPA Victoria the environment. Standard AS1940 Storage Handling of Flammable publications 480 Environmental Guidelines for Major Construction Sites and 347 and Combustible Liquids and EPA Victoria Bunding Guidelines publications 480 Environmental Guidelines for Develop and implement management measures for dangerous substances, Major Construction Sites and 347 Bunding including: Guidelines. Develop and implement management measures x Creating and maintaining a dangerous goods register for dangerous substances, including: x Disposing of any hazardous materials, including asbestos, in accordance with x Creating and maintaining a dangerous goods Industrial Waste Management Policies, regulation and relevant guidelines register x Implementing requirements for the installation of bunds and precautions to x Disposing of any hazardous materials, reduce the risk of spills including asbestos, in accordance with x Developing contingency and emergency response plans to handle fuel and Industrial Waste Management Policies, chemical spills, including availability of on-site hydrocarbon spill kits. regulation and relevant guidelines SWP7 (see SWR1) x Implementing requirements for the installation of bunds and precautions to reduce the risk of spills Developing contingency and emergency response plans to handle fuel and chemical spills, including availability of on-site hydrocarbon spill kits. SWR14 West Gate Earthworks Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway mobilised in stormwater as Initial SW4 (see SWR12) SWP4 (see SWR12) a result of earthworks Initial SW7 (see SWR1) SWP7 (see SWR1) excavations, causing adverse impacts on waterway health. SWR15 West Gate Earthworks Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) during earthworks, causing adverse impacts on waterway health.
76 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR16 West Gate Relocation of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway 220kV power lines mobilised in stormwater as Initial SW4 (see SWR12) SWP4 (see SWR12) and towers, a result of construction Initial SW7 (see SWR1) SWP7 (see SWR1) protection of other activities undertaken to utilities that may be relocate the 220kV power impacted lines and towers, causing adverse impacts on waterway health. SWR17 West Gate Construction of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway surface roads and mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) other civil during construction of Initial SW7 (see SWR1) SWP7 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing adverse impacts on waterway health. SWR18 West Gate Construction of Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway surface roads and spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) other civil mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) infrastructure works during the construction of surface roads and other civil infrastructure works, causing adverse impacts on waterway health. SWR19 West Gate Construction of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway bridge over mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) Kororoit Creek and during the construction of a Initial SW7 (see SWR1) SWP7 (see SWR1) associated civil bridge over Kororoit Creek infrastructure works and associated civil infrastructure, causing adverse impacts on waterway health. SWR20 West Gate Construction of Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway bridge over spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) Kororoit Creek and mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) associated civil during the construction of a infrastructure works bridge over Kororoit Creek and associated civil infrastructure, causing adverse impacts on waterway health. SWR21 West Gate Construction of Flood event occurring R Initial SW4 (see SWR12) Unlikely Minor Low SWP4 (seeSWR12) Unlikely Minor Low Freeway bridge over while works are Initial SW7 (see SWR1) SWP6 (see SWR13) Kororoit Creek and undertaken to construct a SWP7 (seeSWR1) associated civil bridge over Kororoit Creek infrastructure works and associated civil infrastructure works, causing inundation of machinery, and release of fuels into the environment. SWR22 West Gate Construction of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway bridge over Stony mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) Creek and during the construction of a Initial SW7 (see SWR1) SWP7 (see SWR1) associated civil bridge over Stony Creek infrastructure works and associated civil infrastructure, causing adverse impacts on waterway health. SWR23 West Gate Construction of Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway bridge over Stony spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) Creek and mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) associated civil during the construction of a infrastructure works bridge over Stony Creek and associated civil infrastructure, causing adverse impacts on waterway health.
West Gate Tunnel Project | Environment Effects Statement 77 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR24 West Gate Construction of Flood event occurring R Initial SW4 (see SWR12) Unlikely Minor Low SWP4 (seeSWR12) Unlikely Minor Low Freeway bridge over Stony while works are Initial SW7 (see SWR1) SWP6 (see SWR13) Creek and undertaken to construct a SWP7 (seeSWR1) associated civil bridge over Stony Creek infrastructure works and associated civil infrastructure works, causing inundation of machinery, and release of fuels into the environment. SWR25 West Gate Construction of Disturbance of acid R Unlikely Minor Low CSP3 (see CSR1) Unlikely Minor Low Freeway bridge over Stony sulphate soils during Creek and construction of a bridge associated civil over Stony Creek and infrastructure works associated civil infrastructure, causing adverse impacts on waterway health. SWR26 West Gate Dive structure / Flood event occurring R Initial SW4 (see SWR12) Unlikely Moderate Medium SWP4 (seeSWR12) Unlikely Moderate Medium Freeway portal construction while works are Initial SW7 (see SWR1) SWP6 (see SWR13) undertaken to construct the SWP7 (seeSWR1) southern tunnel dive structures/portals, causing inundation of machinery, and release of fuels into the environment. SWR27 West Gate Dive structure / Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low Freeway portal construction mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) during the construction of Initial SW7 (see SWR1) SWP7 (see SWR1) the southern tunnel dive structures/portals, causing adverse impacts on waterway health. SWR28 West Gate Dive structure / Pollutants from stockpiled R Initial SW1 (see SWR12) Rare Minor Low SWP1 (see SWR12) Rare Minor Low Freeway portal construction spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) during the construction of the southern tunnel dive structures/portals, causing adverse impacts on waterway health. SWR29 West Gate Relocation of 66kV Site works for the R Initial SW9 Develop and implement appropriate Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway power lines and underground relocation of measures to maintain bank stability of Moonee SWP9 - Bank stability towers, protection 66kV power lines resulting Ponds Creek, Stony Creek, Maribyrnong River, Develop and implement appropriate measures to maintain bank stability of Kororoit of other utilities that in bed and/or bank Yarra River and Kororoit Creek during Creek, Stony Creek, Maribyrnong River, Moonee Ponds Creek during construction may be impacted instability at Stony Creek. construction to the satisfaction of Melbourne to the satisfaction of Melbourne Water and in consultation with relevant local Water in consultation with relevant local councils. councils. Initial SW15 Provide adequate clearances and SWP10 - Waterway modifications access for ongoing maintenance of Melbourne Water and other drainage authority assets. Design and undertake modifications to all waterways in a way to mitigate the effects of changes to flow and minimise, to the extent practicable, the potential for erosion, sediment plumes and exposure of contaminated material during construction to the satisfaction of Melbourne Water and in consultation with relevant local councils. Maximise the visual and aesthetic amenity of the waterways having regard to relevant development plans and in consultation with Melbourne Water. SWP14 - Maintenance of Melbourne Water and other drainage assets Provide adequate clearances and access for ongoing maintenance of Melbourne Water and other drainage authority assets to the satisfaction of the relevant drainage authority. BP6 (see BR4) SWR30 West Gate Relocation of Site works associated with R Initial SW9 (see SWR29) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway 220kV power lines the relocation of Initial SW15 (see SWR29) SWP9 (see SWR29) and towers, underground power lines SWP10 (see SWR29) protection of other causing adverse impacts to utilities that may be the structural condition of SWP14 (see SWR29) impacted existing drainage assets. BP6 (see BR4)
78 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR31 West Gate Construction of Site works associated with R Initial SW9 (see SWR29) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low Freeway surface roads and the construction of surface Initial SW15 (see SWR29) SWP9 (see SWR29) other civil roads and other civil SWP10 (see SWR29) infrastructure works infrastructure works causing adverse impacts to SWP14 (see SWR29) the structural condition of BP6 (see BR4) existing drainage assets. SWR32 West Gate Construction of Water restrictions during R Initial SW8 Where available and practicable, of Unlikely Minor Low SWP8 - Use of non-potable water Unlikely Minor Low Freeway surface roads and summer drought conditions suitable quality, and meets health and safety Where available and practicable, of suitable quality, and meets health and safety other civil restrict the availability of requirements, stormwater, recycled water, requirements, stormwater, recycled water, groundwater inflow to tunnels or other infrastructure works potable water required for groundwater inflow to tunnels or other water water sources must be used in preference to potable water for construction dust suppression for the sources must be used in preference to potable activities, including concrete mixing and dust control. construction of surface water for construction activities, including roads and other civil concrete mixing and dust control. infrastructure. SWR43 Tunnels Site clearance & Diversion or obstruction of R Initial SW7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low construction site stormwater flow paths as a SWP11 (see SWR1) establishment result of site clearance and SWP12 (see SWR1) construction site establishment causing increased inundation of surrounding properties. SWR44 Tunnels Tunnel Disturbance of acid R Unlikely Minor Low CSP3 (see CSR1) Unlikely Minor Low Construction sulphate soils during construction of tunnels, causing adverse impacts on water quality and waterway health. SWR45 Tunnels Tunnelling activities Discharge of contaminated R Initial SW1 (see SWR12) Unlikely Major Medium SWP1 (see SWR12) Unlikely Major Medium groundwater to surface Initial SW4 (see SWR12) SWP4 (see SWR12) water during tunnelling Initial SW7 (see SWR1) SWP7 (see SWR1) activities causing adverse SWP3 - Tunnel waste water impacts to waterway health Initial SW3 Any proposed discharge of tunnel and stability. waste water from the site must be approved by Any proposed discharge of tunnel waste water from the site must be approved by the relevant drainage authority prior to discharges the relevant authority prior to discharges occurring. occurring. SWR46 Tunnels Tunnelling activities Pollutants from stockpiled R Initial SW1 (see SWR12) Rare Major Low SWP1 (see SWR12) Rare Major Low spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) during tunnelling activities, causing adverse impacts on waterway health. SWR47 Tunnels Tunnel construction Water restrictions during R Initial SW8 (see SWR32) Unlikely Minor Low SWP8 (see SWR32) Unlikely Minor Low summer drought conditions restrict the availability of potable water required for dust suppression for tunnel construction. SWR51 Port, CityLink Site clearance & Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low and city construction site stormwater flow paths as a Initial SWP12 (see SWR1) SWP11 (see SWR1) connections establishment result of site clearance and SWP12 (see SWR1) construction site establishment, causing increased inundation of surrounding properties. SWR52 Port, CityLink Earthworks Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low and city stormwater flow paths as a Initial SWP12 (see SWR1) SWP11 (see SWR1) connections result of earthworks and SWP12 (see SWR1) construction activities, causing increased inundation of surrounding properties. SWR53 Port, CityLink North Yarra Main Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Unlikely Minor Low and city Sewer realignment stormwater flow paths as a Initial SWP12 (see SWR1) SWP11 (see SWR1) connections and protection of result of site clearance for Initial SW16 Design any proposed realignment to SWP12 (see SWR1) other utilities the relocation of sewer the North Yarra Main Sewer to the satisfaction of SWP15 - North Yarra Main Sewer infrastructure, causing Melbourne Water. increased inundation of Design any proposed realignment to the North Yarra Main Sewer to the satisfaction properties surrounding of Melbourne Water. Footscray Main Drain.
West Gate Tunnel Project | Environment Effects Statement 79 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR54 Port, CityLink Dive structure / Diversion or obstruction of R Initial SW7 (see SWR1) Rare Moderate Low SWP7 (see SWR1) Rare Moderate Low and city portal construction stormwater flow paths as a Initial SW12 (see SWR1) SWP11 (see SWR1) connections result of construction of the Initial SW13 (see SWR11) SWP12 (see SWR1) northern tunnel dive structures/portals, causing increased inundation of properties surrounding Footscray Main Drain. SWR55 Port, CityLink Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low and city surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) connections other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing inundation of properties surrounding Maribyrnong River. SWR56 Port, CityLink Construction of Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Rare Moderate Low and city surface roads and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) connections other civil during construction of SWP12 (see SWR1) infrastructure works surface roads and other civil infrastructure works, causing inundation of properties surrounding Moonee Ponds Creek. SWR57 Port, CityLink Construction of Diversion or obstruction of R Initial SW7 (see SWR1) Unlikely Moderate Medium SWP7 (see SWR1) Unlikely Moderate Medium and city bridge over the stormwater flow paths Initial SW11 (see SWR9) SWP11 (see SWR1) connections Maribyrnong River during temporary works to Initial SW12 (see SWR1) SWP12 (see SWR1) and associated civil construct a bridge over the infrastructure works Maribyrnong River, causing adverse impacts on Maribyrnong River and surrounding area. SWR58 Port, CityLink Construction of Diversion or obstruction of R Initial SW7 (see SWR1) Possible Moderate Medium SWP7 (see SWR1) Rare Moderate Low and city bridge over the stormwater flow paths Initial SW11 (see SWR9) SWP11 (see SWR1) connections Moonee Ponds during temporary works to Initial SW12 (see SWR1) SWP12 (see SWR1) Creek and construct bridges over associated civil Moonee Ponds Creek, infrastructure works causing increased inundation of properties surrounding Moonee Ponds Creek. SWR59 Port, CityLink Construction of the Diversion or obstruction of R Initial SWP7 (see SWR1) Unlikely Minor Low SWP7 (see SWR1) Rare Minor Low and city twin viaducts and stormwater flow paths Initial SWP12 (see SWR1) SWP11 (see SWR1) connections the shared use during temporary works SWP12 (see SWR1) path and required to construct the associated civil twin viaducts and the infrastructure works shared use path, causing increased inundation of properties in the surrounding area along Footscray Road. SWR60 Port, CityLink Site clearance & Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city construction site mobilised in stormwater as Initial SW4 (see SWR12) SWP4 (see SWR12) connections establishment a result of site clearance Initial SW7 (see SWR1) SWP7 (see SWR1) and construction activities, causing adverse impacts on waterway health. SWR61 Port, CityLink Earthworks Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city mobilised in stormwater as Initial SW4 (see SWR12) SWP4 (see SWR12) connections a result of earthworks Initial SW7 (see SWR1) SWP7 (see SWR1) excavations, causing adverse impacts on waterway health. SWR62 Port, CityLink Earthworks Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) connections mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) during earthworks, causing adverse impacts on waterway health.
80 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR63 Port, CityLink Precast plant Discharge of pollutants R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city construction and from the precast plant Initial SW4 (see SWR12) SWP4 (see SWR12) connections manufacturing of during the manufacturing Initial SW7 (see SWR1) SWP7 (see SWR1) precast units of tunnel precast units, causing adverse impacts to waterway health. SWR64 Port, CityLink Dive structure / Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city portal construction mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) connections during the construction of Initial SW7 (see SWR1) SWP7 (see SWR1) the northern tunnel dive structures/portals, causing adverse impacts on waterway health. SWR65 Port, CityLink Dive structure / Pollutants from stockpiled R Initial SW1 (see SWR12) Rare Minor Low SWP1 (see SWR12) Rare Minor Low and city portal construction spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) connections mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) during the construction of the northern tunnel dive structures/portals, causing adverse impacts on waterway health. SWR66 Port, CityLink Dive structure / Flood event occurring R Initial SW4 (see SWR12) Unlikely Moderate Medium SWP4 (seeSWR12) Unlikely Moderate Medium and city portal construction while works are Initial SW7 (see SWR1) SWP6 (see SWR13) connections undertaken to construct the SWP7 (seeSWR1) northern tunnel dive structures/portals, causing inundation of machinery, and release of fuels into the environment. SWR67 Port, CityLink Construction of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city bridge over the mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) connections Maribyrnong River during the construction of a Initial SW7 (see SWR1) SWP7 (see SWR1) and associated civil bridge over the infrastructure works Maribyrnong River and associated civil infrastructure, causing adverse impacts on waterway health. SWR68 Port, CityLink Construction of Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city bridge over the spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) connections Maribyrnong River mobilised in stormwater as Initial SW7 (see SWR1) SWP7 (see SWR1) and associated civil a result of construction of a infrastructure works bridge over the Maribyrnong River and associated civil infrastructure, causing adverse impacts on waterway health. SWR69 Port, CityLink Construction of Flood event occurring R Initial SW4 (see SWR12) Unlikely Minor Low SWP4 (seeSWR12) Unlikely Minor Low and city bridge over the while works are being Initial SW7 (see SWR1) SWP6 (see SWR13) connections Maribyrnong River undertaken to construct a SWP7 (seeSWR1) and associated civil bridge over the infrastructure works Maribyrnong River and associated civil infrastructure works, causing inundation of machinery, and release of fuels into the environment. SWR70 Port, CityLink Construction of Disturbance of acid R Unlikely Minor Low CSP3 (see CSR1) Unlikely Minor Low and city bridge over the sulphate soils during connections Maribyrnong River construction of a bridge and associated civil over Maribyrnong River infrastructure works and associated civil infrastructure, causing adverse impacts on waterway health.
West Gate Tunnel Project | Environment Effects Statement 81 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR71 Port, CityLink Construction of Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city bridge over mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) connections Moonee Ponds during the construction of Initial SW7 (see SWR1) SWP7 (see SWR1) Creek and bridges over Moonee associated civil Ponds Creek and infrastructure works associated civil infrastructure, causing adverse impacts on waterway health. SWR72 Port, CityLink Construction of Pollutants from stockpiled R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city bridge over spoil sites becoming Initial SW4 (see SWR12) SWP4 (see SWR12) connections Moonee Ponds mobilised in stormwater Initial SW7 (see SWR1) SWP7 (see SWR1) Creek and during the construction of associated civil bridges over Moonee infrastructure works Ponds Creek and associated civil infrastructure, causing adverse impacts on waterway health. SWR73 Port, CityLink Construction of Flood event occurring R Initial SW4 (see SWR12) Unlikely Minor Low SWP4 (seeSWR12) Unlikely Minor Low and city bridge over while works are being Initial SW7 (see SWR1) SWP6 (see SWR13) connections Moonee Ponds undertaken to construct a SWP7 (seeSWR1) Creek and bridge over the Moonee associated civil Ponds Creek and infrastructure works associated civil infrastructure works, causing inundation of machinery, and release of fuels into the environment. SWR74 Port, CityLink Construction of Disturbance of acid R Unlikely Minor Low CSP3 (see CSR1) Unlikely Minor Low and city bridge over sulphate soils during connections Moonee Ponds construction of bridges Creek and over Moonee Ponds Creek associated civil and other civil infrastructure works infrastructure works, causing adverse impacts on water quality and waterway health. SWR75 Port, CityLink Construction of the Pollutants in soil becoming R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low and city viaduct and the mobilised in stormwater Initial SW4 (see SWR12) SWP4 (see SWR12) connections shared use path during the construction of Initial SW7 (see SWR1) SWP7 (see SWR1) and associated civil the twin viaducts and the infrastructure works shared use path and associated civil infrastructure works, causing adverse impacts on waterway health. SWR76 Port, CityLink Construction of Construction of piers and R Initial SW7 (see SWR1) Possible Minor Medium SWP7 (see SWR1) Unlikely Minor Low and city bridge over the associated river works Initial SW9 (see SWR29) SWP9 (see SWR29) connections Maribyrnong River (including bank widening) Initial SW10 Design and undertake modifications SWP10 (see SWR29) and associated civil in Maribyrnong River to all waterways in a way to minimise the potential infrastructure works resulting in bed and/or for erosion, sediment plumes and exposure of bank erosion. contaminated material during construction to the satisfaction of Melbourne Water in consultation with relevant local councils. Maximise the visual and aesthetic amenity of the waterways having regard to relevant development plans and in consultation with Melbourne Water. Initial SW11 (see SWR9) Initial SW15 (see SWR29) SWR77 Port, CityLink Construction of Construction of piers and R Initial SW7 (see SWR1) Possible Minor Medium SWP7 (see SWR1) Unlikely Minor Low and city bridge over associated river works Initial SW9 (see SWR29) SWP9 (see SWR29) connections Moonee Ponds (including bank widening) Initial SW10 (see SWR76) SWP10 (see SWR29) Creek and in Moonee Ponds Creek associated civil resulting in bed and/or Initial SW11 (see SWR9) infrastructure works bank erosion. Initial SW15 (see SWR29)
82 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR78 Port, CityLink North Yarra Main Site works associated with R Initial SW15 (see SWR29) Unlikely Minor Low SWP14 (see SWR29) Unlikely Minor Low and city Sewer realignment the relocation of sewer Initial SW16 (see SWR53) BP6 (see BR4) connections and protection of infrastructure causing SWP15 (SWR53) other utilities adverse impacts to the structural condition of existing drainage assets. SWR79 Port, CityLink Construction of the Piling activities in R Initial SW15 (see SWR29) Unlikely Minor Low SWP14 (see SWR29) Unlikely Minor Low and city viaduct and the Footscray Road causing BP6 (see BR4) connections shared use path adverse impacts to the and associated civil structural condition of infrastructure works existing drainage assets. SWR80 Port, CityLink Construction of Water restrictions during R Initial SW8 (see SWR32) Unlikely Minor Low SW8 (see SWR32) Unlikely Minor Low and city surface roads and summer drought conditions connections other civil restrict the availability of infrastructure works potable water required for dust suppression for the construction of surface roads and other civil infrastructure. Operation Risks SWR33 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Unlikely Minor Low SWP11 (see SWR1) Unlikely Minor Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Kayes Drain, Humes Main Drain or Cherrys Main Drain. SWR34 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Rare Minor Low SWP11 (see SWR1) Rare Minor Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Kororoit Creek. SWR35 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Burgess Street Main Drain. SWR36 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Shutts Estate Main Drain. SWR37 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Stony Creek near Williamstown Road. SWR38 West Gate West Gate Diversion or obstruction of R Initial SW12 (see SWR1) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low Freeway Freeway stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) operations during West Gate Freeway operation, causing increased inundation of properties surrounding Stony Creek near Hyde Street.
West Gate Tunnel Project | Environment Effects Statement 83 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR40 West Gate West Gate A change in the R Initial SW1 (see SWR12) Possible Minor Medium SWP1 (see SWR12) Unlikely Minor Low Freeway Freeway concentration of pollutants Initial SW2 Integrate the stormwater treatment SWP4 (see SWR12) operations in stormwater runoff from system into the design of the West Gate Tunnel SWP2 - Water sensitive road design the West Gate Freeway as Project in accordance with VicRoads Integrated a result of additional Integrate the stormwater treatment system into the design of the works in Water Management Guidelines (June 2013) and accordance with VicRoads Integrated Water Management Guidelines (June 2013) impervious surfaces, the EPA Best Practice Environmental and the EPA Victoria Best Practice Environmental Management Guidelines for causing adverse impacts Management Guidelines for Urban Stormwater Urban Stormwater (2006). on waterway health. (2006). SWR41 West Gate West Gate Discharge of fuels, oils and R Initial SW5 Design the capacity of the stormwater Possible Major High SWP5 - Spill containment design Unlikely Major Medium Freeway Freeway other contaminants as a drainage system to contain hazardous spills to the Design the capacity of the stormwater drainage system for all new roads and operations result of spills on satisfaction of EPA Victoria, including incident ramps to contain hazardous spills at or prior to every stormwater outlet, to the carriageways causing response procedures. satisfaction of EPA Victoria, and develop procedures to be implemented in adverse impacts on water response to a hazardous spill. quality and waterway SWP6 (see SWR13) health. SWR42 West Gate West Gate Increase in pavement area R Initial SW2 (see SWR40) Possible Minor Medium SWP2 (see SWR40) Unlikely Minor Low Freeway Freeway on the West Gate Freeway Initial SW12 (see SWR1) SWP11 (see SWR1) operations resulting in increased stormwater flow rates, affecting geomorphology of receiving waters. SWR39 West Gate Tunnel Operations Diversion or obstruction of R Initial SW12 (see SWR1) Rare Minor Low SWP11 (see SWR1) Rare Minor Low Freeway stormwater flow paths as a Initial SW13 (see SWR11) SWP12 (see SWR1) result of the southern portals, causing increased inundation of properties surrounding Stony Creek near Williamstown Road SWR48 Tunnels Tunnel operations Inundation of vehicles and R Initial SW14 Design tunnel portals to exclude Rare Severe Medium SWP13 - Tunnel portal flood risk Rare Severe Medium the general public in a surface flows from external catchments during Design tunnel portals to exclude surface flows from external catchments during the flood event during the both construction and operation periods and probable maximum flood. operation of the tunnel. inform design with a risk assessment that considers a range of events, including Develop and implement measures and plans to manage flood risk to the tunnel assessment of the probable maximum flood. portals. Develop operation and maintenance plans for flood protection works. Develop and implement measures and operational plans to manage flood emergency events for the tunnel portals. SWR49 Tunnels Tunnel operations A change in the R Initial SW1 (see SWR12) Unlikely Minor Low SWP1 (see SWR12) Unlikely Minor Low concentration of pollutants Initial SW2 (see SWR40) SWP2 (see SWR40) in stormwater runoff from Initial SW4 (see SWR12) SWP3 (see SWR45) the new tunnels as result of the construction of SWP4 (see SWR12) additional impervious surfaces, causing adverse impacts on waterway health. SWR50 Tunnels Tunnel operations Discharge of fuels, oils and R Initial SW5 (see SWR41) Unlikely Moderate Medium SWP5 (see SWR41) Rare Moderate Low other contaminants as a SWP6 (see SWR13) result of spills on carriageways causing adverse impacts on water quality and waterway health. SWR81 Port, CityLink Port, CityLink and Diversion or obstruction of R Initial SW12 (see SWR1) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low and city city traffic stormwater flow paths Initial SW13 (see SWR11) SWP12 (see SWR1) connections operations during port, CityLink and city connections operation as a result of the permanent civil and infrastructure changes, causing increased inundation of properties surrounding Maribyrnong River.
84 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R SWR82 Port, CityLink Port, CityLink and Diversion or obstruction of R Initial SW11 (see SWR9) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low and city city traffic stormwater flow paths Initial SW12 (see SWR1) SWP12 (see SWR1) connections operations during port, CityLink and Initial SW13 (see SWR11) city connections operation as a result of the permanent civil and infrastructure changes, causing increased inundation of properties surrounding Moonee Ponds Creek. SWR83 Port, CityLink Port, CityLink and Diversion or obstruction of R Initial SW11 (see SWR9) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low and city city traffic stormwater flow paths Initial SW12 (see SWR1) SWP12 (see SWR1) connections operations during port, CityLink and Initial SW13 (see SWR11) city connections operation as a result of waterway and floodplain modification, causing increased inundation of properties surrounding Maribyrnong River. SWR84 Port, CityLink Port, CityLink and Diversion or obstruction of R Initial SW11 (see SWR9) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low and city city traffic stormwater flow paths Initial SW12 (see SWR1) SWP12 (see SWR1) connections operations during port, CityLink and Initial SW13 (see SWR11) city connections operation as a result of waterway and floodplain modification, causing increased inundation of properties surrounding Moonee Ponds Creek. SWR85 Port, CityLink Tunnel operations Diversion or obstruction of R Initial SW11 (see SWR9) Rare Moderate Low SWP11 (see SWR1) Rare Moderate Low and city stormwater flow paths as a Initial SW12 (see SWR1) SWP12 (see SWR1) connections result of the northern Initial SW13 (see SWR11) portal, causing increased inundation of properties surrounding Footscray Main Drain SWR86 Port, CityLink Port, CityLink and A change in the R Initial SW1 (see SWR12) Possible Minor Medium SWP1 (see SWR12) Unlikely Minor Low and city city traffic concentration of pollutants Initial SW2 (see SWR40) SWP2 (see SWR40) connections operations in stormwater runoff from Initial SW4 (see SWR12) SWP4 (see SWR12) the port, CityLink and city connections as a result of additional impervious surfaces, causing adverse impacts on waterway health. SWR87 Port, CityLink Port, CityLink and Discharge of fuels, oils and R Initial SW5 (see SWR41) Likely Major High SWP5 (see SWR41) Unlikely Major Medium and city city traffic other contaminants as a SWP6 (see SWR13) connections operations result of spills on carriageways causing adverse impacts on water quality and waterway health. SWR88 Port, CityLink Port, CityLink and Increase in pavement area R Initial SW2 (see SWR40) Unlikely Minor Low SWP2 (see SWR40) Unlikely Minor Low and city city traffic from the viaduct and Initial SW12 (see SWR1) SWP11 (see SWR1) connections operations shared use paths resulting
in increased stormwater flow rates, affecting geomorphology of receiving waters. SWR89 Port, CityLink Port, CityLink and Increase in pavement area R Initial SW2 (see SWR40) Likely Minor Medium SWP2 (see SWR40) Unlikely Minor Low and city city traffic on the Port, CityLink and Initial SW12 (see SWR1) SWP11 (see SWR1) connections operations city connections resulting
in increased stormwater flow rates, affecting geomorphology of receiving waters.
West Gate Tunnel Project | Environment Effects Statement 85 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Transport Construction Risks TR1 West Gate Site clearance and Traffic movements R Initial TP3. Develop and implement traffic Possible Major High TP3 - Traffic management plans Possible Minor Low Freeway construction site associated with management measures to minimise disruption to Develop and implement Traffic Management Plans with measures to minimise establishment construction site clearance motor vehicle traffic, parking, bicycle and disruption, to the extent practicable, to motor vehicle traffic, parking, bicycle and and establishment pedestrian movements during construction in pedestrian movements during construction in consultation with relevant road impedes the safe and consultation with relevant road management management authorities, including: efficient movement of local authorities, including: traffic, including PT x Management of any temporary or partial closure of traffic lanes, including x Management of any temporary or partial along: movements and cyclists closure of traffic lanes, including along: and pedestrians x Local roads, including provision for suitable routes for vehicles, cyclist x Local roads, including provision for and pedestrians to maintain connectivity for road and shared path users suitable routes for vehicles, cyclist and pedestrians to maintain connectivity for x CityLink traffic lanes and ramps road and shared path users x M1 and Footscray Road x CityLink traffic lanes and ramps x Hyde Street, Francis Street, Whitehall Street x M1 and Footscray Road x A strategy for maintaining the current capacity (number of lanes) during peak x Hyde Street, Francis Street, periods for works on the following key State roads - West Gate Freeway, Whitehall Street Princes Freeway, M80, Footscray Road, Wurundjeri Way, Dudley Street, Williamstown Road, Millers Road, Grieve Parade x Restrict the number of local roads to be used for construction-related transportation to x Restrict the number of local roads to be used for construction-related minimise impacts on amenity, in construction transportation to minimise impacts on amenity, in consultation with the with the relevant road authorities relevant road authorities x Reinstate access to open space, community x Reinstate access to open space, community facilities, commercial premises facilities, commercial premises and dwellings and dwellings if disrupted, as soon as practicable if disrupted, as soon as practicable x Provide suitable parking arrangements to accommodate the construction x Provide suitable parking arrangements to workforce whilst minimising traffic impacts on local roads, preventing accommodate the construction workforce construction-related parking on local roads or use of public car parks whilst minimising traffic impacts on local x Provide safe access points to laydown areas and site compounds roads, preventing construction-related x Implement a communications strategy (as set out in the CCEP) to advise parking on local roads or use of public car affected users, potentially affected users, relevant stakeholders and the parks relevant road authorities of any changes to transport conditions x Provide safe access points to laydown areas x Maintain, where practicable, current local area traffic management measures and site compounds during construction or reinstate upon completion in consultation with the x Implement a communications strategy to relevant local councils advise affected users, potentially affected x Haulage of bulk material to and from the construction areas to within a two km users, relevant stakeholders and the relevant range of the works must be via roads operated by VicRoads, CityLink or the road authorities of any changes to transport Port Manager or, subject to obtaining prior agreement by the relevant road conditions authority, other parts of the road network. x Maintain, where feasible, current local area The Traffic Management Plan may include Worksite Traffic Management Plans traffic management measures during (WTMP) for discrete components or stages of the works having the potential to construction or reinstate upon completion in impact on roads, shared used paths, pedestrian paths or public transport consultation with the relevant local councils. infrastructure. TR2 West Gate Earthworks Traffic movements R Initial TP3 (see TR01) Possible Moderate Medium TP3 (see TR1) Possible Minor Low Freeway associated with earthworks TP7 - Traffic Management Liaison Group impedes the safe and A Traffic Management Liaison Group (TMLG) must be established prior to the efficient movement of local commencement of any works that may impact on existing roads, paths or public traffic, including PT transport infrastructure. The TMLG must include representatives from the State, movements and cyclists VicRoads and Project Co. Other relevant agencies as nominated by the State may and pedestrians be included as required. The TMLG will be a forum for exchange of information and discussion of issues associated with Traffic Management Plans. The TMLG must be provided with the Traffic Management Plans, details as to timing of implementation, information about construction traffic monitoring conducted by Project Co, and other reports as relevant. The TMLG must meet regularly until the completion of construction. TR3 West Gate Construction of Traffic movements R Initial TP3 (see TR01) Possible Moderate Medium TP3 (see TR1) Unlikely Minor Low Freeway surface roads and associated with TP7 (see TR2) other civil construction activity infrastructure works impedes the safe and efficient movement of freeway traffic, including the disruption associated with the potential closure of traffic lanes
86 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R TR4 West Gate Construction of Normal traffic flows on the R Initial TP3 (see TR01) Possible Moderate Medium TP3 (see TR1) Possible Minor Low Freeway surface roads and freeway are impeded by TP7 (see TR2) other civil narrowing of traffic lanes to infrastructure works accommodate construction activity and by driver behaviour around construction activity within the freeway TR5 West Gate Construction of Public transport impeded R Initial TP3 (see TR1) Possible Major High TP3 (see TR1) Possible Minor Low Freeway surface roads and by traffic movements Initial TP4. Develop and implement measures to TP4 - Public transport other civil associated with minimise disruption during construction to all Develop and implement measures to minimise to the extent practicable disruption infrastructure works construction of surface impacted railway lines, tram and bus routes in during construction to all impacted railway lines, tram and bus routes in roads and other civil consultation with VicTrack, Yarra Trams and consultation with VicTrack, Yarra Trams and Metro Trains Melbourne and to the infrastructure works, Metro Trains Melbourne and to the satisfaction of satisfaction of Public Transport Victoria. including potential Public Transport Victoria. TP5 - Rail operations temporary closures of bus Initial TP5. Minimise disruption to the rail routes and rail lines, and Minimise disruption to the rail infrastructure and operations in consultation with the infrastructure and operations to the satisfaction of incidental damage to PT relevant rail infrastructure stakeholders. the operators. infrastructure TP7 (see TR2) TR6 West Gate Construction of Cyclists and pedestrians R Initial TP3 (see TR01) Unlikely Minor Low TP3 (see TR1) Unlikely Minor Low Freeway surface roads and impeded by traffic TP7 (see TR2) other civil movements and activities infrastructure works associated with construction of surface roads and other civil infrastructure works. TR7 West Gate Construction of Traffic movements R Initial TP3 (see TR01) Possible Moderate Medium TP3 (see TR1) Unlikely Moderate Medium Freeway surface roads and associated with TP7 (see TR2) other civil construction activity infrastructure works impede freight accessibility to the Port of Melbourne and increase travel times for freight traffic generally TR8 West Gate Construction of Traffic movements R Initial TP3 (see TR01) Unlikely Minor Low TP3 (see TR1) Unlikely Minor Low Freeway surface roads and associated with TP7 (see TR2) other civil construction activity affect infrastructure works access and egress to industrial and commercial premises through increased congestion and temporary road closures TR9 West Gate Construction of Traffic movements R Initial TP3 (see TR01) Possible Minor Low TP3 (see TR1) Possible Minor Low Freeway surface roads and associated with TP7 (see TR2) other civil construction activity affect infrastructure works access and egress to recreational facilities and public open space through increased congestion and temporary road closures TR10 West Gate Construction of Traffic movements R Initial TP3 (see TR1) Likely Moderate High TP2 - Traffic monitoring Unlikely Moderate Medium Freeway surface roads and associated with Initial TP2. Under take traffic monitoring in Undertake traffic monitoring in selected streets identified in consultation with the other civil construction activity on the selected streets identified in consultation with the relevant local council pre-construction, at six monthly intervals during construction, infrastructure works West Gate Freeway relevant local council pre-construction, at two up to two years after construction is complete, and implement local area traffic generate additional traffic yearly intervals during construction (up to two management works in consultation with the local relevant councils. and congestion of the years after construction is complete), and Develop and implement traffic performance management along the West Gate surrounding road network implement local area traffic management works in Freeway during construction. Real time traffic information must be provided to through road users seeking consultation with the local relevant councils. drivers on the approach to the West Gate Freeway diversions around the Freeway TP7 (see TR2) TR11 West Gate Ancillary Traffic movements R Initial TP3 (see TR1) Possible Minor Low TP3 (see TR1) Possible Minor Low Freeway development – associated with noise Initial TP4 (see TR5) TP4 (see TR5) noise barriers, barrier relocation and the Initial TP5 (see TR5) TP5 (see TR5) Freeway installation of FMS Management infrastructure impedes the TP7 (see TR2) System safe and efficient movement of local traffic, including the disruption associated with the potential closure of traffic lanes, PT routes and shared user paths
West Gate Tunnel Project | Environment Effects Statement 87 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R TR12 Tunnels Site clearance and Traffic movements R Initial TP3 (see TR1) Unlikely Minor Low TP3 (see TR1) Unlikely Minor Low construction site associated with Initial TP4 (see TR5) TP4 (see TR5) establishment construction site clearance Initial TP5 (see TR5) TP5 (see TR5) and establishment impedes the safe and efficient movement of local traffic, including PT movements and cyclists and pedestrians TR13 Tunnels North Yarra Main Construction traffic R Initial TP3 (see TR1) Possible Moderate Medium TP3 (see TR1) Possible Minor Low Sewer realignment movements associated Initial TP4 (see TR5) TP4 (see TR5) and protection of with sewer realignment Initial TP5 (see TR5) TP5 (see TR5) other utilities impedes the safe and efficient movement of TP7 (see TR2) traffic on arterial and local roads, including PT movements, and pedestrian and cycle movements TR14 Tunnels Dive structure / Traffic associated with the R Initial TP3 (see TR1) Possible Major High TP3 (see TR1) Possible Minor Low portal construction construction of the dive Initial TP4 (see TR5) TP4 (see TR5) structures and portals Initial TP5 (see TR5) TP5 (see TR5) impedes to safe and efficient movement of TP7 (see TR2) traffic, including PT movements, on the West Gate Freeway through temporary lane closures TR15 Tunnels Dive structure / Construction works R Initial TP3 (see TR01) Unlikely Minor Low TP3 (see TR1) Unlikely Minor Low portal construction associated with the dive TP7 (see TR2) structures and portals results in temporary closure or diversion of pedestrian and bicycle paths, due to proximity to construction activities TR16 Tunnels Precast plant Construction traffic R Initial TP3 (see TR1) Possible Minor Low TP3 (see TR1) Possible Minor Low construction and associated with the precast Initial TP4 (see TR5) TP7 (see TR2) manufacturing of plant and the Initial TP5 (see TR5) precast units manufacturing of precast units impedes the safe and efficient movement of traffic and PT movements on arterial and local roads in the vicinity of the northern portal TR17 Tunnels Precast plant Construction traffic R Initial TP3 (see TR01) Possible Minor Low TP3 (see TR1) Possible Minor Low construction and associated with the precast TP7 (see TR2) manufacturing of plant and the precast units manufacturing of precast units impedes safe and efficient pedestrian and bicycle movements on arterial and local roads, and on dedicated pedestrian or bicycle paths in the vicinity of the northern portal TR18 Tunnels Tunnelling activities Construction traffic R Initial TP3 (see TR1) Possible Major High TP3 (see TR1) Possible Minor Low associated with the Initial TP4 (see TR5) TP4 (see TR5) removal of spoil generated Initial TP5 (see TR5) TP5 (see TR5) by tunnelling activities impedes the safe and TP7 (see TR2) efficient movement of traffic and PT movements on arterial and local roads in the vicinity of the northern portal
88 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R TR19 Tunnels Tunnelling activities Construction traffic R Initial TP3 (see TR01) Possible Minor Low TP3 (see TR1) Possible Minor Low associated with the TP7 (see TR2) removal of spoil generated by tunnelling activities impedes safe and efficient pedestrian and bicycle movement on arterial and local roads, including dedicated pedestrian and bicycle paths in the vicinity of the northern portal TR20 Tunnels Tunnelling activities Construction traffic R Initial TP3 (see TR1) Possible Major High TP3 (see TR1) Possible Minor Low associated with the Initial TP4 (see TR5) TP4 (see TR5) removal of spoil generated Initial TP5 (see TR5) TP5 (see TR5) by tunnelling activities, in conjunction with similar TP7 (see TR2) traffic movements generated by MMRA generates cumulative impacts on the movements of local traffic, PT movements, and the use of pedestrian and cycle networks TR21 Port, CityLink Site clearance and Traffic movements R Initial TP3 (see TR1) Possible Minor Low TP3 (see TR1) Possible Minor Low and city construction site associated with Initial TP4 (see TR5) TP4 (see TR5) connections establishment construction site clearance Initial TP5 (see TR5) TP5 (see TR5) and establishment impedes the safe and TP7 (see TR2) efficient movement of local TP9 - Melbourne Metro Rail Authority Interface traffic, including PT Consult and coordinate with Melbourne Metro Rail Authority to manage and where movements and cyclists possible minimise, cumulative impacts of construction vehicles. and pedestrians TR22 Port, CityLink Earthworks Traffic movements R Initial TP3 (see TR1) Possible Minor Low TP3 (see TR1) Possible Minor Low and city associated with earthworks Initial TP4 (see TR5) TP4 (see TR5) connections impedes the safe and Initial TP5 (see TR5) TP5 (see TR5) efficient movement of local traffic, including PT TP7 (see TR2) movements and cyclists TP9 (see TR21) and pedestrians TR23 Port, CityLink Construction of Traffic movements R Initial TP3 (see TR1) Possible Minor Low TP3 (see TR1) Possible Minor Low and city bridge over the associated with Initial TP4 (see TR5) TP4 (see TR5) connections Maribyrnong River construction activity Initial TP5 (see TR5) TP5 (see TR5) and associated civil impedes the safe and infrastructure works efficient movement of TP7 (see TR2) traffic and public transport TP8 - River navigation on arterial and local roads Navigational channel of Maribyrnong River must not be impeded without approval due to potential temporary of the relevant authority. closure of traffic lanes TR24 Port, CityLink Construction of Works associated with the R Initial TP3 (see TR01) Unlikely Insignificant Negligible TP3 (see TR1) Unlikely Insignificant Negligible and city bridge over the bridge construction and TP7 (see TR2) connections Maribyrnong River associated civil works TP8 (see TR23) and associated civil results in temporary infrastructure works closure or diversion of pedestrian and bicycle paths, due to proximity to construction activities TR25 Port, CityLink Construction of Works associated with the R Initial TP3 (see TR01) Unlikely Insignificant Negligible TP3 (see TR1) Unlikely Insignificant Negligible and city bridge over the bridge construction and TP7 (see TR2) connections Moonee Ponds associated civil works TP9 (see TR21) Creek and results in temporary associated civil closure or diversion of infrastructure works pedestrian and bicycle paths, due to proximity to construction activities
West Gate Tunnel Project | Environment Effects Statement 89 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R TR26 Port, CityLink Construction of the Construction traffic R Initial TP3 (see TR1) Possible Major High TP3 (see TR1) Possible Minor Low and city twin viaducts and movements and Initial TP4 (see TR5) TP4 (see TR5) connections the shared user construction activity Initial TP5 (see TR5) TP5 (see TR5) path and impede the safe and associated civil efficient movement of TP7 (see TR2) infrastructure works traffic, PT movements and TP9 (see TR21) the use of cycle and pedestrian paths on arterial and local roads. TR27 Port, CityLink Ancillary Traffic movements and R Initial TP3 (see TR1) Unlikely Minor Low TP3 (see TR1) Unlikely Minor Low and city development (civil construction activity Initial TP4 (see TR5) TP7 (see TR2) connections and M&E) – noise associated with ancillary Initial TP5 (see TR5) barriers, Freeway works, installation of noise Management barriers and installation of System the FMS impede the safe and efficient movement of traffic, PT movements and the use of cycle and pedestrian paths on arterial and local roads Operation Risks TR28 West Gate West Gate Traffic patterns on arterial R Initial TP1. Optimise the design of the Works in Unlikely Minor Low TP1 - Optimise design performance Unlikely Minor Low Freeway Freeway and local roads in consultation with appropriate road management Optimise the design of the works in consultation with appropriate road operations surrounding residential authorities as part of the detailed design management authorities as part of the detailed design process to: neighbourhoods are process to: adversely impacted by x Minimise adverse impact on travel times for all transport modes, including x Minimise adverse impact on travel times for walking and cycling traffic diverting to avoid all transport modes, including walking and tolls, curfews or temporary cycling x Maintain, and where practicable, enhance the existing traffic movements at closures due to interchanges maintenance activity. x Maintain, and where feasible, enhance the existing traffic movements at interchanges x Design interchanges and intersections to meet relevant road and transport authority requirements x Design interchanges and intersections to meet relevant road and transport authority x Maintain, and where practicable, enhance pedestrian movements, bicycle requirements connectivity, and shared use paths x Maintain, and where feasible, enhance x Develop a strategy with Public Transport Victoria to minimise impacts on pedestrian movements and bicycle buses, trams and rail and, where practicable, enhance public transport connectivity facilities and services that cross or run parallel to the alignment of the Freeway x Develop a strategy with Public Transport x Minimise loss of car parking in consultation with relevant local councils. Victoria to minimise impacts on buses, trams TP6 - Design standards and rail and, where feasible, enhance public Design new works (including shared use facilities) in accordance with applicable transport facilities and services that cross or design standards and undertake independent road safety audits after each stage of run parallel to the alignment of the Freeway detailed design and after construction.. x Minimise loss of car parking in consultation with relevant local councils. Initial TP6. Design new Works in accordance with applicable road design standards and undertake independent road safety audits after each stage of detailed design and after construction. TR29 West Gate West Gate Traffic patterns on arterial R Initial TP1 (see TR28) Unlikely Minor Low TP1 (see TR28) Unlikely Minor Low Freeway Freeway and local roads in Initial TP6 (see TR28) TP6 (see TR28) operations surrounding residential neighbourhoods are adversely impacted by traffic diverting to avoid incidents on the Freeway, or temporary closures due to incident response. TR30 West Gate West Gate Public transport services R Initial TP1 (see TR28) Possible Minor Low TP1 (see TR28) Possible Minor Low Freeway Freeway are adversely affected by operations delays or loss of travel time reliability due to additional traffic through key intersections, due to altered local traffic patterns or temporary closures due to maintenance activity.
90 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R TR31 West Gate West Gate Pedestrians and cyclists R Initial TP1 (see TR28) Unlikely Minor Low TP1 (see TR28) Unlikely Minor Low Freeway Freeway are adversely affected by Initial TP6 (see TR28) TP6 (see TR28) operations delays or loss of travel time reliability as a result of additional traffic through key intersections, due to altered local traffic patterns or temporary closures due to maintenance activity. TR32 Tunnels Tunnel operations Tunnel closures for R Initial TP1 (see TR28) Possible Minor Low TP1 (see TR28) Possible Minor Low emergencies or maintenance activity result in impacts on traffic patterns in residential neighbourhoods. TR33 Tunnels Tunnel operations Tunnel closures for R Initial TP1 (see TR28) Possible Minor Low TP1 (see TR28) Possible Minor Low emergencies or maintenance activity result in temporary impacts on public transport services and on pedestrian and cycle movements on arterial and local roads TR34 Tunnels Tunnel operations Placarded loads and over R Initial TP1 (see TR28) Possible Minor Low TP1 (see TR28) Possible Minor Low height vehicles fail to use the Hyde Street ramps and are unable to be identified in sufficient time to avoid tunnel closures TR35 Port, CityLink Port, city and Traffic patterns on arterial R Initial TP1 (see TR28) Unlikely Minor Low TP1 (see TR28) Unlikely Minor Low and city CityLink traffic and local roads in Initial TP6 (see TR28) TP6 (see TR28) connections operations surrounding residential neighbourhoods and urban renewal precincts are adversely impacted by traffic diverting to avoid tolls, curfews or temporary closures due to maintenance activity. TR36 Port, CityLink Port, city and Public transport services R Initial TP1 (see TR28) Possible Minor Low TP1 (see TR28) Possible Minor Low and city CityLink traffic are adversely affected by connections operations delays or loss of travel time reliability due to additional traffic through key intersections, due to altered local traffic patterns or temporary closures due to maintenance activity. TR37 Port, CityLink Port, city and Pedestrians and cyclists R Initial TP1 (see TR28) Unlikely Minor Low TP1 (see TR28) Unlikely Minor Low and city CityLink traffic are adversely affected by Initial TP6 (see TR28) TP6 (see TR28) connections operations delays or loss of travel time reliability as a result of additional traffic through key intersections, due to altered local traffic patterns or temporary closures due to maintenance activity. Vibration and Regenerated Noise Construction Risks VR1 Tunnels Cross passage R Initial NVP10: Undertake real time vibration and Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low development may require noise monitoring to demonstrate compliance with NVP5 (see NVR09) blasting due to the rock limits and publish these results. Identify NVP12 (seeNVR09) competency (Amenity) contingency measures to be implemented if limits are not met. NVP13 (see NVR09) SP2 (see SR01) EMP4 (see HR1) VR2 Tunnels Cross passage R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Unlikely Minor Low development may require NVP5 (see NVR09) blasting due to the rock competency
West Gate Tunnel Project | Environment Effects Statement 91 Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R (Damage/Equipment) NVP7 (see NVR01) NVP8 (see NVR01) NVP12 (see NVR09) NVP13 (see NVR09) VR3 Tunnels Cross passage R Initial NVP10 (see VR1) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low development results in SP2 (see SR01) prolonged vibration levels that exceed the EMP4 (see HR1) permissible levels of NVP6 (see NVR01) vibration (Amenity) VR4 Tunnels Cross passage R Initial NVP10 (see VR1) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low development results in NVP7 (see NVR01) prolonged vibration levels that exceed the permissible levels of vibration (Damage/Equipment) VR5 Tunnels Predicted vibration levels R Initial NVP10 (see VR1) Unlikely Minor Low NVP3 (see NVR01) Unlikely Minor Low consistent with permissible NVP7 (see NVR01) values result although damage to residential, commercial or other infrastructure occurs (Damage/Equipment) VR6 Tunnels Ground vibration from R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Unlikely Minor Low tunnel and ramps NVP7 (see NVR01) construction equipment NVP8 (see NVR01) affecting above-ground heritage or other property assets (Damage) VR7 Tunnels Assets that are particularly R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Rare Moderate Low vulnerable to vibration and SP2 (see SR01) integrity could be affected may result in loss of EMP4 (see HR1) services provided by these NVP7 (see NVR01) assets until repaired or replaced (Equipment) VR8 Tunnels Vibration damage to the R Initial NVP10 (see VR1) Possible Major High NVP3 (see NVR01) Unlikely Major Low North Yarra Main Sewer NVP7 (see NVR01) from tunnelling with TBM NVP8 (see NVR01) (Damage) VR9 Tunnels Vibration damage to the R Initial NVP10 (see VR1) Possible Major High NVP3 (see NVR01) Unlikely Major Medium North Yarra Main Sewer NVP7 (see NVR01) from shaft access activities NVP8 (see NVR01) near to the tunnel (Damage) VR10 Tunnels Vibration damage to the R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Rare Moderate Low high voltage tower or NVP7 (see NVR01) elevated road piers and NVP8 (see NVR01) footings by TBM activities (Damage) VR11 Tunnels Ground Vibration from R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Unlikely Minor Low TBM for the mainline SP2 (see SR01) tunnel construction exceeding permissible EMP4 (see HR1) levels for ‘quality of life’ for NVP6 (see NVR01) DAYTIME activities (Amenity) VR12 Tunnels Ground Vibration from P Initial NVP4: Almost Moderate High NVP3 (see NVR01) Likely Minor Medium TBM for the mainline Prepare and implement a Construction Noise and Certain SP2 (see SR01) tunnel construction Vibration Management Plan (CNVMP) as part of EMP4 (see HR1) exceeding permissible the Construction Environmental Management levels for ‘quality of life’ for Plan in consultation with affected local councils NVP6 (see NVR01) EVENING activities and EPA Victoria. The CNVMP must meet the (Amenity) surface construction noise and vibration criteria including those set out in EPA Victoria publication 480 Guidelines for Major Construction Sites, EPA Victoria Publication 1254 Noise Control Guidelines and Australian Standard 2436 2010
92 West Gate Tunnel Project | Environment Effects Statement Attachment II | Appendix B – Risk registers
Initial risk rating (L = likelihood, Residual risk rating (L = likelihood, Potential impact pathway C = consequences, R = Risk level) C = consequences, R = Risk level) Project (P= planned, Risk ID Component Activity R = risk event) P/R Initial Environmental Performance Requirements L C R Final Environmental Performance Requirements L C R Guide to Noise Control on Construction, Maintenance and Demolition Sites including: x Working hours x Night time (if required) and day time construction noise limits x A noise communications plan for advising and informing the community of work scheduling and working hours Monitoring and response protocols for managing noise complaints and remedial action VR13 Tunnels Regenerated Noise from R Initial NVP10 (see VR1) Likely Moderate High NVP3 (see NVR01) Likely Minor Medium TBM for the mainline SP2 (see SR01) tunnel exceeding permissible levels for EMP4 (see HR1) ‘quality of life’ during NVP13 (see NVR09) DAYTIME periods (Amenity) VR14 Tunnels Regenerated Noise from P Initial NVP4 (see VR12) Almost Moderate High NVP3 (see NVR01) Likely Minor Medium TBM for the mainline Initial NVP10 (see VR1) Certain SP2 (see SR01) tunnel construction exceeding permissible EMP4 (see HR1) levels for ‘quality of life’ NVP13 (see NVR09) during EVENING periods. (Amenity) VR15 Tunnels Rock types and contractor R Initial NVP10 (see VR1) Possible Major High NVP3 (see NVR01) Unlikely Moderate Medium assessment necessitates a SP2 (see SR01) change in construction methods leading to EMP4 (see HR1) increased impact on NVP6 (see NVR01) residents, equipment and infrastructure via vibration levels or duration (Amenity) VR16 Tunnels Rock types and contractor R Initial NVP10 (see VR1) Unlikely Moderate Medium NVP3 (see NVR01) Unlikely Minor Low assessment necessitates a SP2 (see SR01) change in construction methods leading to EMP4 (see HR1) increased impact on NVP7 (see NVR01) residents, equipment and infrastructure via vibration levels or duration (Damage) VR17 Tunnels Rock types and contractor R Initial NVP10 (see VR1) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low assessment necessitates a SP2 (see SR01) change in construction methods leading to EMP4 (see HR1) increased impact on NVP7 (see NVR01) residents, equipment and infrastructure via vibration levels or duration (Equipment) VR18 Tunnels Competency of rock mass R Initial NVP10 (see VR1) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low requires drilling and SP2 (see SR01) blasting or hydraulic hammers for the portal EMP4 (see HR1) developments as a method NVP6 (see NVR01) of excavation (Amenity) NVP13 (see NVR09) VR19 Tunnels Competency of rock mass R Initial NVP10 (see VR1) Possible Moderate Medium NVP3 (see NVR01) Unlikely Minor Low requires drilling and SP2 (see SR01) blasting for the portal developments as a method EMP4 (see HR1) of excavation NVP7 (see NVR01) (Damage/Equipment) Operation Risks Not applicable for Vibration and Regenerated Noise
West Gate Tunnel Project | Environment Effects Statement 93