1. Introduction Wulguru Technical Services Pty Ltd (WTS) was engaged by Heritage Minerals Pty Ltd owner and operator of the Mount Morgan Mine, to prepare a Greenhouse Gas (GHG) Assessment for the emissions resulting from the construction, operation and closure of the Upper Mundic Gully Tailings Storage Facility (TSF) (the Project), in support of the associated Environmental Authority (EA) Amendment. The Greenhouse Gas Emissions Guidelines (DETSI, 2025) outline the requirements of a GHG assessment for an EA Amendment. These requirements and the respective sections where they have been addressed in this report are shown in Table 1.
Table 1. DETSI Requirements for GHG Assessments
Application Requirement
Section
Description of the GHG emissions likely to be generated throughout the life of the project. Include an emissions inventory identifying the GHG to be emitted and the stage of the project at which the emissions will occur. Include a breakdown of GHG emissions by source that: Estimated the projected annual Scope 1 and Scope 2 CO2-e emissions over the life of the project. Include both unabated emissions and emissions after all avoidance and abatement measures have been accounted.
Section 4.1
Section 4.4
Provides an estimate of annual Scope 3 emissions and total Scope 3 emissions over the life of the project
Determine if the application meets the medium to high GHG emission category:
• applications with expected GHG emissions (Scope 1 and Scope 2) 25,000 tonnes CO2-e or more per year (at any time during the life of the project) are considered medium to high emitters ; and • applications with expected GHG emissions (Scope 1 and Scope 2) of less than 25,000 tonnes CO2-e per year are considered low emitters . Identify the management practices proposed to be implemented to prevent or minimise adverse impacts. Proposed management practices should demonstrate that all reasonable and practical measures have been applied to manage GHG emissions through best practice design, process, technology, and management. Risk assessment that outlines the scale of expected GHG emissions from the activity and how they are expected to contribute to climate change impacts on Queensland’s environmental values
Section 4.3
Section 8
Section 7
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