Waihi North Project Preliminary Site Investigation (Ground Contamination) Williamson Water & Land Advisory Limited Other facilities such as the cleaners’ room, compliance pond, electrical store, first aid room, oil store, and the cylinder yards, contained household quantities and/ or products which are not likely to impact ground conditions, including cleaning products, hydrochloric acid, pest control, lubricants, sealants, and aerosols. The following table presents a list of fire events recorded by OGNZL since 2009. We have noted the significance of each event with regard to contamination on the right-hand side. Notes discussing significance are as follows: 1. Negligible – contamination unlikely due to fire 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. 2. Minor – Contamination possible due to fire 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 setting. 3. Significant – contamination likely present due to fire event, with increased risk of levels exceeding applicable human health or environmental criteria. Table A.1.4. OGNZL Records – Fire Events Date Location Detail Significance N M S 5 May 2009 Production Area - Waihi An electrical fire occurred at Newmont Waihi Gold's mill on Tuesday 5 May. The fire started at 11.32am in the Mill Motor Control Centre (MCC) switchboard and circuitry and was brought under control by on-site rescue teams and emergency services. The fire was reported extinguished at 12.13pm. All staff were accounted for and no injuries were sustained. There was, however, major damage sustained to the switchboard and circuitry for the Plant. 19 November 2009 Production Area - Waihi While flushing the RO concentrate line during a pigging operation, water was required. A line from the fire suppression system was piped over the bund wall. Water almost flooded electric motors. 14 February 2010 Production Area - Waihi Operator noticed oil on the ground while reversing out of rock box. Then noticed smoke. Shut down machine. Another operator arrived and extinguished fire. 7 April 2010 Production Area - Waihi Staff member on leaving meeting could smell burning in welding bay. He found a fire burning in a rubbish bin and used a fire extinguisher to put it out. 9 May 2011 Production Area - Waihi Capacitor in power factor correction panel burst. At approx. 4.20pm Monday 9th May a smoke alarm for Transfer Station activated on Scada and smoke was observed to be coming out of Transfer Station MCC. The fire alarm sounded at MCC. Maintenance and Electrical Supervisors inspected the MCC finding smoke but no flames. The cause was found to be a faulty power factor capacitors. The power factor correction was isolated and the MCC de-isolated. 9 March 2012 Production Area - Waihi An electrician was removing a bearing from a motor. As the bearing would not move with the hydraulic puller, heat was applied to the bearing with a gas torch and grease in the bearing caught Fire. The electrician used a fire extinguisher to put out fire. 15 January 2014 Production Area - Waihi Fitter using welder to hardface area in bottom of hopper and feeder observed cable to hydraulic power pack hot and smoking. Noticed by spotter/fire watch. 12 March 2014 Production Area - Waihi While cooking a BBQ in workshop to celebrate a certificate ceremony, the fat tray caught fire, creating smoke and activating the smoke alarm. 4 April 2017 Unknown "Contract fitter left freshly painted pipework on workbench with gas heater positioned blowing hot air to dry the paint. A canvas welding screen nearby was caught by the wind, blowing it towards the heater, eventually causing ignition. Two personnel standing nearby immediately observed the flames and extinguished small fire with dry powder extinguisher."
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