31 7 Should a discharge occur that causes an objectionable adverse effect, the Consent Holder shall provide a written report to the Waikato Regional Council within five days of being notified of such by the Waikato Regional Council. The report shall specify: a. the cause or likely cause of the event and any factors that influenced its severity; b. the nature and timing of any measures implemented by the Consent Holder to avoid, remedy or mitigate any adverse effects; and c. the steps to be taken in future to prevent recurrence of similar events. 8 Vehicle wheel washing facilities shall be provided at the entrances to the mine sites from public roads. The wheel washing facilities shall be well maintained and shall be used by all soiled vehicles exiting the site as required, to minimise the tracking of particulate matter off-site. 9 Access roads to the mine sites (excluding internal access roads) shall be bitumen sealed (or to an equivalent standard approved by Waikato Regional Council). Sealing shall take place as soon as practicable upon exercise of this consent and/or as part of any access road construction that is required. Sealed surfaces shall be kept as clean and free of accumulations of dust as practicable. 10 Stockpiles shall be managed to minimise particulate emissions from this source. Methods may include but are not limited to: covering, grassing, sheltering from prevailing winds, or wetting down. 11 Exposed yard surfaces and roadways shall be kept damp as necessary to minimise particulate discharges to air, including during non-work hours. 12 No chemical dust suppressants or additives shall be used without prior written approval from the Waikato Regional Council. Processing Plant - Air Discharge 13 The Consent Holder shall not process ore from the Gladstone Open Pit until a mercury retort oven has been installed and commissioned for use in the Processing Plant. 14 a. The discharges to air from the electrowinning circuit shall occur via a stack of at least 8 m above local ground level. b. The discharges to air from the oven and furnace shall occur via a stack of at least 8.5 m above local ground level. c. The discharges to air from the carbon regeneration area shall occur via a stack of at least 12.5 m above local ground level. These are the discharge parameters used in the Beca report modelling.
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