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 87 of 124 SOLID CYANIDE SPILL PURPOSE • To provide guidelines for responding to a solid cyanide spill HAZARDS • Cyanide usually fatal if ingested, absorbed through the skin, dust enters eyes, or HCN gas inhaled • Environmental damage RISK ASSESSMENT • Moderate SITE EMERGENCY COORDINATOR • Area Manager RESPONSE TO HAZARDS • Do not risk life • Mobilise emergency response team if required • Wear full face mask with appropriate filter or BG4 • Monitor area for HCN gas • Wear full wet weather protective suit (rubber boots to be worn inside wet weather trousers and PVC gloves to be worn inside of wet weather jacket) • Keep area clear of bystanders EVACUATION • All non-emergency personnel to be kept clear of the area CONTAINMENT • Remain upwind of cyanide or spills and monitor for HCN gas • Avoid contact with water • Shovel up all of the spilled solid and place in plastic bags or sealed drums • Sweep up remaining particles carefully • Neutralise spill area with ferrous sulphate SPECIAL EQUIPMENT • Breathing apparatus and full face respirator and appropriate filter • Ambulance with additional oxygen equipment on standby EMERGENCY ACTION POINTS • Ensure Site Emergency Co-ordinator is given requested support • Keep an emergency logsheet • Ensure mine management is advised of the emergency at first opportunity and kept up to date EMERGENCY CONTACTS • See general listing in appendix 5 for contact telephone numbers EXTERNAL RESOURCES • National Poison Centre 0800 764 766 • Waihi Medical Centre 863 8195
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