OceanaGold Waihi North Project Vibration Performance Assessment Page 29 of 41 Project Number: HP2006-2 Heilig & Partners Save Date: 21/06/2022 5:55:00 PM ABN 56 082 976 714 File Name: WAI-985-000-REP-LC-0018_Rev 0 Figure 10 – Possible vibration monitoring sites for the plant access tunnel Additional monitoring sites may be required if further monitoring identifies anomalous regions that are not adequately covered by the monitoring network, or where there are reasonable concerns by residents that warrant additional monitoring locations. For these purposes, multiple roving monitors will be utilised. These matters are already addressed in the Vibration Management Plan and will apply to WNP. The proposed vibration conditions require that the level of vibration for all blasts is monitored. The percentile calculation is based upon all recorded vibration data that exceeds the pre-set threshold level set in the Vibration Management Plan. Where the level of vibration does not exceed the threshold level of vibration, the blast is not included in the calculation of the 95th percentile statistics. The monitoring vibration threshold level will be noted in the Vibration Management Plan to accommodate any future changes that may be required because of the elevated vibration at the monitoring site. The blasting results from the fixed monitoring locations will be displayed on OceanaGold’s web page. It is proposed to use an aerial photograph showing each of the monitoring locations with a pop-up menu showing the blast events and recorded vibration levels like that which has been implemented for Correnso, modified as required for WNP. OceanaGold’s current web page is shown in Figure 11.
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