Supporting Technical Assessments

Waihi Emergency Principal Control Plan Approved by: General Manager/SSE Approval Date: 26/03/2021 Next Review:26/03/2022 OceanaGold Waihi WAI-250-PLN-001 Page 74 of 124 BP Contingency Plan The following steps will be followed in the emergency situation of excessive ground movement for removal of one 40,000 litre PUFF tanks at Pit surface storage facility: 1. BP Engineer advised OceanaGold of excessive ground movement in storage tank area. OceanaGold to also advise current levels of fuel in tanks, and if power to PUFF tanks still OK and likely to remain so. 2. BP Engineer to liaise with BP Distribution to arrange tanker/tankers. Response time max 4 hours for tanker/tankers until on site. 3. BP Engineer to liaise with Fuelquip Tauranga to arrange as necessary, tanker hoses, 100 mm bulk diesel driven pump (held at Fuelquip Tauranga) and spill trailer, equipment recovery vehicles Cranes, trucks etc. Response time max 2 hours until on site. 4. BP Engineer to liaise with Commercial Manager, and Incident line then go to site. Response time max 2 hours until on site. Contacts BP Commercial Manager Ben Clifton 027 276 7915 ECL Group Fuel Group Tauranga (Steve Vine) 0274 522 629 / 04-8028400 Emergency 04 495 5000 Monitoring and Reporting Refer to procedures: • Spill Response • Offsite Spills Discharges Environmental Investigation & Reporting Safety Data Sheets (SDS) For specific emergency response to chemical spills refer to official hardcopy SDS available at: • Baxter Road- First Aid Room • Main Office - Safety Administrators Office • Mines Rescue • Chem Alert - various computers Indicators of Chemical Incident • Numerous dead animals/birds/fish • Lack of insect life • Unexplained odours o Fruity to flowery o Sharp/pungent o Garlic/horseradish o Almonds/peach kernel o New mown hay • Mass casualties • Pattern of casualties • Blisters/rashes • Unusual liquid droplets or films • Ground hugging cloud / fog • Different looking areas – discoloured, withered, dead • Unusual debris – metal, • Time to take effect– chemical symptoms (minutes to hours)

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