Proposed Resource Consent Conditions

61 12 All construction works shall be implemented under the supervision of persons with appropriate and documented experience in the supervision of civil engineering construction works. 13 On completion of the initial foundations, underdrainage system, and surface water drainage system construction works and prior to the commissioning of any subsequent stages, the Consent Holder shall supply written confirmation to the Waikato Regional Council stating that the foundations, underdrainage system, and surface water drainage system works have been constructed in accordance with the design referred to in Condition 11. Thereafter, the facility shall be inspected by a person or persons with recognised documented experience in the design of rock storage facilities (the Designer) on an annual basis, and a written report on the inspection provided to the Waikato Regional Council within one month of completion of the inspection. 14 The Consent Holder shall not place any potentially acid forming material within the footprint of the Willows Rock Stack or Mine Access Road until the Condition 13 report has been submitted to the Waikato regional Council in respect of that location, acknowledging that the Willows Rock Stack and its foundations may be developed in stages. Monitoring 15 The Consent Holder shall install groundwater quality monitoring bores to detect any seepage bypassing the underdrainage system, and to determine the representative groundwater quality for shallow and deeper groundwater around the perimeter of land owned by the Consent Holder. Advice Note: All groundwater monitoring in these bores shall be based on the soluble test method, defined as the concentration of dissolved metals measured in that fraction which passes through a 0.45 µm filter. 16 Prior to placing PAF material within the Willows Rock Stack, the Consent Holder shall provide the Waikato Regional Council with 12 months’ baseline monitoring data sufficient to characterise the groundwater regime in its catchment. 17 The Consent Holder shall undertake “scan monitoring” in both shallow and deep aquifer systems, of water levels, pH, and conductivity in order to establish trends in the monitoring bores installed in accordance with Condition 15. Scan monitoring shall commence 12 months prior to placing PAF material within the Willows Rock Stack and continue throughout the term of these consents. The results of that monitoring shall be forwarded to Waikato Regional Council at quarterly intervals. 18 The Consent Holder shall set trigger levels for pH, conductivity and water levels for down gradient bores based on the trends observed in the monitoring data at levels which will provide early warning indicators

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