8. Mitigation and Management Practices As per the DETSI GHG Guidelines, the order of priority for management practices follows the GHG Abatement Hierarchy, shown in Figure 2.
Figure 2. GHG Abatement Hierarchy (Source: DETSI, 2025) GHG emissions for the Project cannot be practicably avoided, therefore, management practices focus on reduction. Proposed management practices to reduce emissions are outlined in Table 14.
Table 14. Management practices to mitigate emissions.
Management Practices
Abatement Hierarchy Ranking
Impact
Vegetation clearing is the source of 66% of Project emissions due to the release of captured carbon. Mulching reduces emissions, compared to traditional methods like burning or bulldozing, by reducing carbon conversion to carbon dioxide. Mulch can also be utilised in rehabilitation to promote revegetation and sequestration, particularly in topsoil deficit areas (da Silva GOA, Dunlop, Nicolson, & Purtill, 2024). Organic matter that remains stored in the mulch would also lead to increased carbon content in soil and improve its ability to store carbon. Optimised material movement will be implemented in line with best practice guidelines (LarkinSykes Advisory & Brinson and Associates, 2022), to reduce Scope 1 emissions from heavy earth moving equipment during construction and closure. This will include optimising payloads, scheduling to minimise material handling, minimising the slope of haul roads, and ensuring efficiency in unloading and loading areas. These measures will maximise equipment usage and reduce overall runtime, therefore reducing emissions.
Mulching
Reduce
Optimised Material Movement
Reduce
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