B-3 – Area 3 - Assessment of Environmental Effects 36 Actual or Potential Effect Recommended Mitigation / Management Recommended Monitoring / Future Action Additional Measures Proposed by OGNZL so that methods of mitigation to control dewatering and settlement occurrences are suitably adapted to address any deviations from expected conditions. (2022) provided in Part H of these application documents. Groundwater Groundwater drawdown effect on domestic and stock bores within reasonable proximity to the Wharekirauponga Access Tunnel. Not required. Groundwater monitoring is proposed in the existing network of wells that surrounds the tunnel decline section near Waihi to ensure near-surface drawdown effects do not develop. Additional monitoring of groundwater levels adjacent to the tunnel is proposed near existing groundwater users to ensure their supply remains unaffected. None. Discharge of contaminated groundwater into the environment. Groundwater collected during tunnelling will be sent to the WTP for treatment. None. None. Post-Closure Effects
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