Waihi North Project Preliminary Site Investigation (Ground Contamination) Williamson Water & Land Advisory Limited A.1.3 OceanaGold Records Records held by OGNZL were provided to us for review. Records include a stock inventory, known fire events and spills. Key documents are summarised below in Table B.1.3 – B.1.5, with provided documents attached in Appendix C. The following summarises the records relevant to the Processing Plant. Locations are provided on Figure 3. Table B.1.3. OGNZL Records – Stock Inventory Location Product Quantity Unit Carbon container Steam processed coconut shell activated carbon 22,000 kg Cyanide mixing plant 4-nitrobenzaldehyde (130176) 200 ml Ferrous sulphate 18% solution (product obsolete) 2,000 L Loaded electrolyte 202.5 m³ Sodium bisulphate (product obsolete) 20 L Sodium cyanide 40 T Sodium cyanide solution - (30% w/w) 100,000 L Spent electrolyte 202.5 m³ Dangerous goods store and cabinet Spray Paint 832 cans Gold room Anhydrous borax 500 Kg Caustic soda - liquid (46%-50%) (nz) 22,500 L Diphoterine ® mini and micro autonomous portable shower (nz) 3.5 L Hydrochloric acid > 25% (nz) 22,500 L Liquefied petroleum gas (lpg) 78,000 L Sodium carbonate (nz) 100 Kg Sodium nitrate (nz) 100 Kg Sulphamic acid (nz) 50 Kg Hazardous goods container Copper sulphate pentahydrate 1,500 Kg Sodium carbonate (nz) 125 Kg Sodium nitrate (nz) 200 Kg Sulphamic acid (nz) 250 Kg Hydrocarbon store Mobil Oil 416 L Laboratory Bromide bromate standard solution (35006) (sds discontinued) 1 L Calcium chloride powder 94-97% 10 Kg Diphoterine ® mini and micro autonomous portable shower (nz) 300 mL Hydrochloric acid > 25% (nz) 20 L Potassium chloride chem. pure, cryst., ph. eur., usp, jp 14, fcc (product obsolete) 2 L Potassium iodide 2 L Potassium permanganate 2 L Silver nitrate for analysis emsure acs, iso, reag. ph eur (101512) 2 L
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