Greenhouse gas emissions Health, amenity Greenhouse gas emissions Environment To manage GGP1 Detailed and Protection Act greenhouse design Integrate sustainable design practices into the design process to minimise environmental 1970 gas emissions greenhouse gas emissions arising from operations and quality to – maintenance of the West Gate Tunnel Project Include mandatory actions minimise adverse under the Protocol for Environmental Management (Greenhouse Gas air quality, noise Emissions and Energy Efficiency in Industry) for selection of best practice and vibration energy usage for the Tunnel ventilation and lighting systems. effects on the GGP2 Emissions reduction Detailed health and design, amenity of nearby In detailed design, consider the selection of materials and monitor energy construction residents, local and carbon during to target reductions for GHG emission communities and impacts of materials and energy consumption in accordance with Mat-1 road users during (Level 2) and Ene-1 (Level 2) credits of the Infrastructure Sustainability (IS) both construction rating tool (v1.2). and operation of the Project. Ground Movement Land stability Geotechnical model and assessment To minimise GMP1 – to avoid or the likelihood construction, Prepare a geotechnical model of representative geological and groundwater minimise adverse of subsidence construction conditions prior to excavation and tunnelling in subject area(s) to identify effects on land and lateral geological structures and groundwater features. This model must include and river bed or ground details of proposed excavations and tunnels, construction staging, and bank geomorphic movement identify surface and sub-surface structures and infrastructure which could be stability from impacted by the Project, including the specific attributes of those structures. Project Activities, This model must be used to assess the predicted settlement, ground including Tunnel movement, stress redistribution and horizontal strain profiles caused by construction and excavation and tunnelling on adjacent property and infrastructure. crossings of the Maintain the predictive model throughout the construction period and review Maribyrnong against monitoring data (EPR GMP5), to regularly assess potential ground River, Kororoit movement impacts. Creek, Stony Creek and GMP2 Tunnel and portal drainage Detailed Moonee Ponds design, Through detailed design and design tunnel and portal drainage Creek. construction and adopt construction methods which minimise adverse changes to groundwater levels during construction and operation to prevent or manage the effects of ground subsidence. In addition to the above, for the northern and southern portal areas design and implement engineering control measures to ensure dewatering does not result in adverse ground movement impact on property or infrastructure.
Greenhouse gas emissions 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. Environment Protection Act 1970 To manage greenhouse gas emissions GGP1 Greenhouse gas emissions Integrate sustainable design practices into the design process to minimise greenhouse gas emissions arising from operations and maintenance of the West Gate Tunnel Project Include mandatory actions under the Protocol for Environmental Management (Greenhouse Gas Emissions and Energy Efficiency in Industry) for selection of best practice energy usage for the Tunnel ventilation and lighting systems. Detailed design GGP2 Emissions reduction In detailed design, consider the selection of materials and monitor energy and carbon during to target reductions for GHG emission impacts of materials and energy consumption in accordance with Mat-1 (Level 2) and Ene-1 (Level 2) credits of the Infrastructure Sustainability (IS) rating tool (v1.2). Detailed design, construction Ground Movement 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. To minimise the likelihood of subsidence and lateral ground movement GMP1 Geotechnical model and assessment Prepare a geotechnical model of representative geological and groundwater conditions prior to excavation and tunnelling in subject area(s) to identify geological structures and groundwater features. This model must include details of proposed excavations and tunnels, construction staging, and identify surface and sub-surface structures and infrastructure which could be impacted by the Project, including the specific attributes of those structures. This model must be used to assess the predicted settlement, ground movement, stress redistribution and horizontal strain profiles caused by excavation and tunnelling on adjacent property and infrastructure. Maintain the predictive model throughout the construction period and review against monitoring data (EPR GMP5), to regularly assess potential ground movement impacts. construction GMP2 Tunnel and portal drainage Through detailed design and design tunnel and portal drainage and adopt construction methods which minimise adverse changes to groundwater levels during construction and operation to prevent or manage the effects of ground subsidence. In addition to the above, for the northern and southern portal areas design and implement engineering control measures to ensure dewatering does not result in adverse ground movement impact on property or infrastructure. Detailed design, construction construction,