EA Condition
Action Program
average seepage rate measured prior to the commencement of mining, or the antecedent pre-mining seepage rates for like prevailing conditions, whichever is known and the greater. W30 The holder of the environmental authority shall design and maintain seepage management systems for disturbed land within operational areas such that seepage does not impact on undisturbed land within operational areas or the environment. W31 The holder of the environmental authority shall only undertake operational activities that are expected to, at the end of mining, result in a reduction in the quantity of seepage or an improvement in water quality or both when compared to background conditions as determined in condition W29. Seepage water quality W32 Water collected by the seepage interception system must be monitored at the locations and frequencies defined in Table W5 – Seepage water monitoring locations and frequency and for the contaminants defined in Table W7 – Receiving water monitoring. W33 If the seepage water contaminant trigger levels defined in Table W9 – Open cut and seepage contaminant trigger levels, are exceeded then the environmental authority holder must complete an investigation into the potential for environmental harm and notify the administering authority within twenty-eight (28) days of receiving the analysis results. W34 With respect to condition W33, the holder of the environmental authority must ensure that all seepage is collected and: (a) in the case that the seepage is alkaline (pH > 7) pumped to Sandstone Gully Tailings Storage Facility; or (b) in the case that the seepage is acidic (pH < 7) pumped to the Mount Morgan Open Cut Pit as agreed with DNRME. Receiving water sampling W35 Receiving waters affected by the release of process water or storm water contaminated by the mining activities or both must be monitored at the locations and frequencies defined in Table W6 – Receiving water monitoring locations and frequency, and for the contaminants defined in Table W7 – Receiving water monitoring.
background conditions for each delineated seepage area will be established, as per EA condition W29.
DNRME currently operates and maintains the seepage collection system. Upon the commencement of mining, seepage management areas for disturbed land will be designed and maintained, as per EA condition W30. DNRME currently operates and maintains the seepage collection system. Upon the commencement of mining, seepage will be managed in accordance with condition W31. DNRME currently operates and maintains the seepage collection system. Seepage water quality will be monitored at the required locations and frequencies, when the EA holder takes responsibility for managing the seepage interception system. DNRME currently operates and maintains the seepage collection system. Upon the commencement of mining, the EA holder shall conduct an investigation into any seepage water contaminant trigger level exceedances and notify the administering authority within 28 days of receiving the analysis results. Sandstone Gully and the Mount Morgan Open Cut Pit are currently joined and operate as the same body of water. Consequently, seepage will be pumped to the Sandstone Gully / Open Cut Pit regardless of pH. DNRME currently manage the seepage interception system. As per EA condition A3, receiving water sampling will occur as per Table W6 and W7 once mining activities commence. Only minor activities will occur on site during the term of this PoO. These will include maintenance and environmental investigations. No mining operations will occur on site.
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Plan of Operations
March 2019
AARC Environmental Solutions Pty Ltd
E info@aarc.net.au
AARC.NET.AU
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