Waihi North Project Preliminary Site Investigation (Ground Contamination) Williamson Water & Land Advisory Limited • 52 Clarke Street – Confirms the property is listed on the Land Use Information Register (ref: LUI05625), as indicated by the area shaded blue with a classification of ‘Contaminated’ due to land use HAIL activities: ‘E7. Mining’; ‘F4. Motor vehicle workshops’; and ‘A17. Storage tanks or drums for fuel, chemicals or liquid waste’ associated with Newmont Waihi Gold. We note that these appear to relate to the process plant rather than the tailings storage facility. • A number of documents are held under consent file 605902E. A.3.3 OceanaGold Records Records held by OGNZL were provided to us for review. The stock inventory (dangerous goods register), known fire events and known spills are presented in Tables B.3.2 to 3.3.4 below. Table A.3.3. OGNZL Records – Stock Inventory Location Product Quantity Unit General BP diesel 38,000 L Soils Laboratory Hydrochloric acid fuming 37% emprove essential ph eur, bp, jp, nf (100314) 200 mL Potassium chloride chem. pure, cryst., ph. eur., usp, jp 14, fcc (product obsolete) 200 g Sodium carbonate anhydrous, reagent grade, acs, iso, reag. ph eur 500 g Table A.3.2: OGNZL Records – Fire Events Date Location Event description Significance N M S 15 December 2017 Development site While operators were burning 5 cyanide boxes, the wind went from nothing to blowing quite hard from the NE and the heat / flames ignited the vegetation outside the designated burn area. Water to Fire suppression hose was isolated and it look longer to extinguish than expected. Table A.3.4. OGNZL Records – Spill Events Date Location Product Event description Significance N M S 6 October 2010 Development site – Support area Hydraulic oil 992 loader loading out NAF dirt onto 777 dump truck off TSF2 blew tilt hose as machine was bogging into stockpile to load next bucket. 70 litres of hydraulic oil lost. Internally worn hose failed. Shut down machine, contained oil Spill & informed supervisor cleaned up contaminated area, transported soil to tsf1a and treated then buried as per site requirements. 12 February 2016 Oil Dump truck 773 was carting waste from North Stockpile to Area 3 along B Haul Road stopped when operator hoped out to check truck, he noticed a transmission oil leak and called his supervisor who came out and coned off the area as well as lay absorbent and soaker pads for the spill. 4. Notes: 5. Negligible – contamination unlikely due to spill event, or if possible, contaminant levels are highly unlikely to be at levels that would present a risk to the people or the environment development. 6. Minor – Contamination possible due to spill event, if present, contamination is likely to be above background levels, but highly unlikely to be at levels that would present a risk to people or the environment in an industrial.
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