Table 1. Responses to DETSI comments Item DETSI Comment
How comment has been addressed
Relevant Sections in
Supporting Information
Report
Sandstone TSF
1
The proposed volume amendment is supported, however, the hydraulic performance criteria stated in Table H3 do not appear to align with the consequence category assessment (CCA). A certified CCA is required to confirm these criteria. This information is requested as part of the PRCP information request, however, if amendments are necessary it is suggested this forms part of the amendment application
Proposed changes to Table H3 of the EA are provided in Table 11. These changes better align the DSA and MRL with the current “High” consequence category for dam break scenario as well as align spillway and DSA requirements from DETSI Manual and ANCOLD requirements respectively
Refer to 2.3.2 – Table 11
Exploration Domain
2
Heritage Minerals intends to maintain conditions A14 and A15 of the EA. Under a scenario where the exploration domain in Table A1 is removed, the department would seek to remove A14 and A15 as no authorisation for exploration disturbance would exist in Table A1. Please ensure to clarify the intention of maintaining conditions A14 and A15 in the absence of exploration disturbance authorisation. Please provide supporting evidence for the removal of the exploration domain. This may include proof of payment for rehabilitation of exploration disturbance, certification of progressive rehabilitation or confirmation that all exploration disturbance occurred within existing EA authorised mine features requiring rehabilitation.
Heritage Minerals supports removing conditions A14 and A15 from the EA. Application updated to remove these conditions
Refer to Section 2.3.1
3
Documentation relating to the proof of payment undertaken by previous EA holders is difficult to source. Propose to discuss further during assessment process
Pipe Corridor
4
Confirmation regarding if Heritage Minerals would seek to amend the disturbance area (1.17 ha) with the EA authorised limit (3 ha).
Heritage Minerals do not wish to amend the disturbance area. The proposed disturbance area of 1.17ha is based on concept engineering. Retaining the EA authorised limit of 3ha provides buffer disturbance area if changes are made to concept engineering in the next design phase A GHG Assessment has been conducted in line with the Guideline – Greenhouse Gas Emissions. The Project is estimated to generate 11,614 t CO2- e of GHG emissions (Scope 1 and 2) across its 7- year life. The maximum annual emissions for the Project are estimated as 9,947 t of CO2-e, occurring in 2028 during construction
Refer to Section 2.1.2
Greenhouse Gas Emissions
5
The application must address GHG emissions in line with the Guideline - Greenhouse gas emissions. This requirement ties into the emissions and releases likely to be generated by the activity. Please refer to the Guideline which sets out the minimum expectations for GHG emissions information to be provided with amendment applications.
New Section 6.11 added which summarises GHD emissions. Complete GHG report is in Appendix L.
Upper Mundic Gully TSF
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