Notice
Information request
e) Particle tracking around the perimeter for the proposed UGM TSF to assess potential pathways.
f) An assessment of risk to groundwater from the UGM TSF.
g) Conduct and submit contaminant transport modelling to predict the movement of potential contaminants from the UGM TSF through the groundwater system. The report to be provided must include:
i.
Predictions of contaminant concentrations at potential receptors over time and at closure. Details of the modelling approach, assumptions, and parameters used, such as hydraulic conductivity, porosity, and seepage rates. Estimated seepage rates considering the high liquid content of the tailings slurry, the permeability of the tailings material and the underlying geology. Sensitivity analyses to evaluate how changes in liquid content (i.e., due to rainfall or evaporation, and the intention to store water on the facility under extreme climatic events) could affect contaminant transport).
ii.
iii.
iv.
h) Sensitivity and uncertainty modelling to provide an indication of the potential risk to groundwater receptors.
i) Closure modelling.
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Groundwater dependent ecosystems (GDEs)
Provide revised application material which:
There is moderate potential terrestrial GDEs and potential GDE aquifers mapped within and around the proposed UGM TSF. Field surveys have not been undertaken to verify the mapped information and the potential risks and impacts via changes in groundwater levels and quality has not been detailed. It is stated, the affected terrestrial GDEs are upslope of the seepage flow direction,
a) Determines the spatial extent of impact from the proposed activity on mapped GDEs. b) Confirms that mapped GDEs within and surrounding the proposed activity (extent of impact zone), have been ground truthed. In the absence of ground truthed information, the application assessment in relation to consideration of the significance of impacts to the
Page 13 of 20 • ESR/2016/3447 • Version 4.02 • Last reviewed: 29 OCT 2025
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