REV DATE REVISION DETAILS APPROVED 0 17.06.22 Draft for review. Project WAIHI NORTH Title Erosion and Sediment Control Plan Tailings Storage Facility 3 – Stage 2A Drawn ZW Checked MP Drawing No. ESCP-TSF3-002-01 Sheet No. 5 NOTES 1. All erosion and sediment controls will be installed and maintained in accordance with the Waikato Regional Council Technical Report 2009/02 ‘Erosion and Sediment Control Guidelines for Soil Disturbing Activities’ (TR2009/02). 2. Completed areas to be stabilised in accordance with TR2009/02. 3. All erosion and sediment control measures will be inspected weekly by the site foreman. 4. Site monitoring will be undertaken before and immediately after rain as well as during heavy rainfall events. Any required maintenance or improvements to control measures will be undertaken immediately. Construction Methodology Construct temporary clean water diversion and SRP-TSF307. Below the footprint of the embankment toe, construct perimeter bunds / dirty water diversions to direct runoff from embankment to the SRP. KEY Erosion and Sediment Control Clean Water Diversion Dirty Water Diversion Culvert Silt Fence Sediment Retention Pond Temporary clean water diversion constructed around the impoundment area to isolate the earthworks area. Area remains directed through to existing TSF1A storage pond. SRP-TSF3-07 Catchment area: 7.5ha Total volume: 2,250m3 Dead storage: 675m3 Live storage: 1,575m3 SRP to incorporate 2x manholes and outlet pipes and 5x T-bars. Existing Collection Pond to be used until decommissioned.
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