AS/NZS 2031' means the Australian Standard AS/NZS 2031 Selection of containers and preservation of water samples for microbiological analysis. AS/NZS 5667.1' means Australian Standard AS/NZS 5667.1 Water quality – Sampling – Guidance on the design of sampling programmes, sampling techniques and preservation and handling of samples. AS/NZS 5667.4' means Australian Standard AS/NZS 5667.4 Water quality – sampling – guidance on sampling from lakes, natural and man-made;.
AS/NZS 5667.12' means Australian Standard AS/NZS 5667.12 Water Quality – Sampling – Guidelines for sampling bottom sediments;. Landfill Definitions means the document entitled "Landfill Waste Classification and Waste Definitions 1996" published by the Chief Executive of the Department of the Environment, as amended from time to time;. NATA accredited means with respect to the analysis of a sample that the laboratory is accredited by NATA for the specified analysis at the time of analysis.
Pledge' means the area defined in the Pledge Map in Attachment 1 and listed as the Pledge Address on page 1 of the License;. Phase 4' means building the turkey nest and connecting the dewatering pipeline infrastructure from Foster Shaft;.
2 Emissions
- General
- Point source emissions to air
- Point source emissions to surface water
- Point source emissions to groundwater
- Emissions to land
- Fugitive emissions
Make up clean padding to cover waste for at least two weeks. Mine dewaters to Lake Lefroy from land-based wells; A5, Africa, Cave Rocks, Foster, Hamlet, West and Idough. Prior to discharge, mine drainage must be established in a culvert lined with a geotextile fabric designed to filter sediment.
Extraction of wastewater from Bellerophon Pit, Africa Pit and Leviathan2 Complex to Lake Lefroy via pipelines and/or canals. Mines water from the Athena Underground Mine, Apollo Pit and Argo Pit to Lake Lefroy via the Argo Slide and two settling ponds. Bellerophon Pit, Leviathan Pit, Leviathan Pit, Britannia Pit, Great Britain Pit, Sirius Pit and Sirius Underground.
Treated wastewater from Cave Rocks, Lefroy Admin, Leviathan, Argo and Athena Paste sewage treatment plants.
3 Monitoring
General monitoring
Monitoring of point source emissions to surface water
Monitoring of emissions to land
Monitoring of inputs and outputs
4 Information
- Records
- Reporting
- Maps
- Reporting and notification forms
As soon as possible, but no later than 17.00 on the next usual working day. Dual monitoring and recovery wells TSF4-21 and TSF4-24 shown below are also defined in Table 1.2.1. These forms are made available to the proponent to report monitoring and other data required by the license.
Name: Monitoring of point source emissions to surface water Form WR1: Monitoring of point source emissions to surface water. Units of measurement used in information provided under Part A and B requirements shall be appropriate to the circumstances of the emission. Date and time of monitoring Measures taken, or intended to be taken, to stop the emission.
Measures that have been or will be taken to rectify, limit or prevent any pollution of the environment that has been or may be caused by the emission.
Decision Document
Proponent: St Ives Gold Mining Company Pty Ltd Licence: L8485/2010/2
Contents
1 Purpose of this Document
2 Administrative summary
Whether the proposal involves the disposal of waste in a specified area (as defined in section 57 of the Environmental Protection Act 1986). Consultation with the Ministry of Water Yes No Are the premises within the area of the Environmental Protection Policy (EPP) Yes No. If yes, please include details here, e.g. The site is subject to the SO2 requirements of the Kwinana EPP.
3 Executive summary of proposal and assessment
Installation and commissioning of a piping and pumping system to retrieve the tailings supernatant (return water) from the Leviathan complex into mill process water tanks or mill return dams. A variation application to include the Leviathan Cave TSF in the permit was submitted to DER in July 2016 with a Certificate of Compliance for Part W approval submitted to DER on September 29, 2016. Before the final variation was issued for the Leviathan Cave TSF, SIGM submitted a second application for an amendment to remove certain asbestos containing materials (ACM) in the South Delta open pit.
4 Decision table
The discharge of residues to an in-pit TSF is not assessed as an emission to land. However, the area between the Lefroy Mill and Leviathan In-pit TSF is heavily disturbed and little vegetation remains. In addition, no known priority species or ecological communities have been identified in the vicinity of the proposed works.
Controls: Leak detection telemetry will be installed on the pipeline to trigger an alarm if a variation in flow rates of more than 5% for 10 minutes or more than 10% for two minutes is detected. In addition, St Ives is proposing to install diversions around all pipelines and regularly inspect the pipeline route for leaks. Existing license terms requiring regular inspections of pipelines and the operation of telemetry systems/enclosures adequately regulate all pipelines transporting environmentally hazardous materials at SIGM.
No further terms are proposed for the License and therefore the residual risk remains unchanged. Dust conditions have already been applied to the License to require St Ives to operate in accordance with the SIGM Dust Management Procedure (SIG-ENV-PR029), which is expected to adequately manage dust generation at SIGM. The landfill is not expected to generate significant odors and therefore no additional odor conditions will be added to the licence.
However, the noise is not expected to interfere with the amenity of the nearest human receptor during operation, as they are located approximately 14 km away. General monitoring condition 3.1.1 will remain on the license to ensure that all samples are collected in accordance with the relevant Australian Standards and submitted to a NATA accredited laboratory. No input or output monitoring will be included in the License as a result of the Leviathan In-pit TSF.
It is expected that the operation of the Leviathan In-pit TSF will result in some seepage. Therefore, groundwater monitoring conditions (including standing water level limits and notification requirements) will be applied to the five proposed monitoring wells located around the Leviathan In-pit TSF. Australian Standard AS/NZS 5667.1 – Water quality sampling – Guidance on sampling design, programmes, sampling techniques and sample preservation and handling.
5 Advertisement and consultation table
6 Risk Assessment
Appendix A
Appendix B
