Site-specific Assessments of Environmental Effects

B-7 – Area 7 - Assessment of Environmental Effects 131 Minimise the risks of adverse effects to the environment and the community associated with the storage of hazardous substances;213 Minimise the risk of adverse effects on the environment and community from contaminated land and the disposal of hazardous substances; 214 and Ensure contaminated land is managed in such a way as to avoid use or development that presents a risk to human health, safety or the environment, or ensure that land is managed so that any potential risks are at acceptable levels for the proposed land use and the environment.215 TSF3 will be purpose-built for the disposal of tailings which, by their nature, are hazardous substances. As set out in preceding sections, TSF3 has been designed to minimise the potential for leaching of contaminants to ground water and land and to withstand natural hazard events (refer to Sections 5.5 and 5.3 of this AEE for further detail). Dam failure scenarios have also been developed, with action plans in place to ensure an appropriate mitigation response is in place in the highly unlikely event of dam failure. All other hazardous substances transported to or stored within Area 7 area will be done so in accordance with the requirements of the Hazardous Substances and New Organism Act. The management of Area 7 with respect to contaminated land is summarised in Section 6of this AEE and addressed in detail in WWLA (2022). Overall, the activities within Area 7 will be undertaken in a manner which ensures that the risk of adverse effects on the environment and community associated with the transportation, storage and use of hazardous substances are appropriately managed, and where necessary, minimised. 7.7 OTHER MATTERS The Whaia te Mahere Taiao a Hauraki (“Hauraki Iwi Environmental Plan”) is considered relevant, and notes the following in relation to mining activities: The extraction of gold, silver and other mineral resources has left long-standing environmental problems in the Hauraki rohe. The disposal of wastewater, chemicals and spoil from the mining process, although much improved, remains an environmental concern to Hauraki iwi; The loss of waahi tapu, including Pukewa; 213 Objective 1 and associated policies, Section 7.7, Hauraki District Plan. 214 Objective 3 and associated policies, Section 7.7, Hauraki District Plan. 215 Policy 3(a)(ii), Section 7.7, Hauraki District Plan.

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