82 — IGO SUSTAINABILITY REPORT 2018 OTHER SIGNIFICANT EMISSIONS IGO completes its annual National Pollutant Inventory (NPI) reporting in accordance with Federal regulations. The NPI is used to track pollution across Australia, and to ensure that the community has access to information about the emission and transfer of toxic substances which may affect them locally. The NPI contains data on 93 substances that have been identified as important due to their possible effect on human health and the environment. In FY18, IGO key NPI reportable pollutants were: Carbon Monoxide kg Nova – Air total 340,617 Long – Air total 8,171 Jaguar – Air total 48,955 IGO total 397,743 Oxides of Nitrogen Nova – Air total 716,447 Long – Air total 17,322 Jaguar – Air total 123,051 IGO total 856,820 Sulphur Dioxide Nova – Air total 409 Long – Air total 16.5 Jaguar – Air total 145 IGO total 570 Volatile Organic Compound Nova – Air total 34,564 Long – Air total 1,361 Jaguar – Air total 4,527 IGO total 40,452 Note: Figures exclude emissions data for Tropicana Operation. MINE CLOSURE PLANNING Closure planning is an essential process that should occur at all stages of the mining lifecycle. Planning for mine closure must consider social, economic, physical and biological parameters that can change over time, particularly when the planning horizon extends past a decade. Poor planning for closure at the initial mining stage can significantly add to the complexity and cost of closure. Stakeholder engagement is a critical part of the closure planning process and should include both internal and external stakeholders. The potential impacts of closure are an ongoing consideration in IGO’s engagement with governments and local communities. Potential impacts of closure are also considered in regard to our support of community development initiatives and local business. In recognition of the potential impacts of mine closure to the environment, community and the economy, IGO has applied increased effort over the last two years to its closure planning process. The Nova, Tropicana, Long and Jaguar Operations, in conformance with Western Australian law, all have approved Mine Closure Plans (MCPs). MCPs are “live” documents that are continually updated throughout the life of our operations. IGO, in accordance with our Group Environment Standard – Rehabilitation and Mine Closure, and the IGO Group Finance Standard – Provisions for Mine Closure, continued to investigate and refine closure strategies at all our operations. Consequently, the revision of MCPs is now a structured approach, incorporating both external regulatory requirements as well as meeting internal standards to ensure adequate stakeholder engagement throughout the mine closure planning process. This is depicted in Figure 32 below. Finally, the revised MCPs enabled provisions for the estimated cost of rehabilitation, decommissioning and restoration relating to areas disturbed by our operations in FY18. These are reviewed, and if required, updated annually. MINE PLAN – DEFINE DOMAINS DEMOLITION AND EARTHWORK SCOPE FINAL LANDFORMS ENGINEERED DESIGNS COMPLETION CRITERIA (BASIS OF DESIGN) DEVELOPMENT REGULAR ENGAGEMENT FIGURE 32