INDEPENDENCE GROUP NL SUSTAINABILITY REPORT 2018

Emission 2017 2018 Units Change from FY17 IGO carbon dioxide (Scope 1 and Scope 2) 90,233 117,686 CO2-e tonnes 27,453 IGO Scope 1 emissions 76,490 103,644 CO2-e tonnes 27,154 IGO Scope 2 emissions 13,743 14,042 CO2-e tonnes 299 Carbon monoxide 245,616 397,743 kg 152,127 Oxides of nitrogen 547,603 856,820 kg 309,217 Sulphur dioxide 401 570 kg 169 Volatile organic compounds 27,018 40,452 kg 13,434 Particulate matter (<10um) 766,606 868,973 kg 102,367 Particulate matter (<2um) 28,906 44,902 kg 15,996 Waste 2017 2018 Units Change from FY17 Tailings (wet tonnes) 882,487 1,667,449 t 784,962 Waste rock 459,991 934,789 t 474,798 Materials to landfill 2,019 2,738 t 719 IGO INPUTS AND OUTPUTS Inputs 2017 2018 Units Change from FY17 Labour 1,781,234 2,039,925 hours 258,691 Ore mined 3,220,000 5,244,000 t 2,024,000 Electricity 105,158 140,392 MWh 35,234 Gas 521,795 493,400 GJ 28,395 Diesel 17,692,448 28,799,250 L 11,106,802 Ground support (steel) 2,443 3,222 t 779 Explosives 1,446 2,328 t 882 Cement 5,775 9,792 t 4,017 Grinding media (steel) 1,286 1,449 t 163 Water 2,719,686 3,259,480 kL 539,794 Reagents - copper sulphate 410 283 t 127 Lubricants and oils 337,000 220,350 L 116,650 Products 2017 2018 Units Change from FY17 Ni in ore delivered 8,433 5,855 t 2,578 Ni in concentrate 3,502 22,258 t 18,756 Cu in ore delivered 592 394 t 198 Cu in concentrate 6,671 11,240 t 4,569 Co in concentrate 122 740 t 618 Zn in concentrate 32,638 26,159 t 6,479 Ag in concentrate 1,376,521 1,067,400 oz 309,121 Au in concentrate 2,532 1,226 oz 1,306 Au in bullion 129,487 140,142 oz 10,655 Note: These figures do not include inputs and outputs from Tropicana Operation, with the exception of IGO's 30% share of gold output and ore mined, which is included. Additional information on IGO’s emissions can be found on the National Pollutant Inventory website http://www.npi.gov.au/. INPUTS MINING & PROCESSING PRODUCTS WASTE & EMISSIONS REHABILITATION WATER | OIL | METALS RECYCLING IGO SUSTAINABILITY REPORT 2018— 29

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