This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 001 R0 20210601 SJP (Waihi North Noise Assessment) ISSUE 5 of 79 SCHEDULE OF FIGURES Figure 1: Aerial view of project components and locality ............................................................................................................6 Figure 2: Established mining areas, with proposed WNP activities.............................................................................................9 Figure 3: Planning zones in the Hauraki District Plan with Waihi North works indicated....................................................... 11 Figure 4: Regular noise monitoring positions used by OGNZL.................................................................................................. 14 Figure 5: Chart showing mean noise levels over last 10 years.................................................................................................. 14 Figure 6: Waihi ambient noise level monitoring sites................................................................................................................ 16 Figure 7: Waihi average measured noise level at each hour of the day .................................................................................. 17 Figure 8: WUG SFA Ambient noise measurement locations..................................................................................................... 19 Figure 9: Wharekirauponga average measured noise level at each hour of the day ............................................................. 20 Figure 10: Noise level regression for typical construction equipment..................................................................................... 25 Figure 11: Indicative extent of Gladstone pit works and surrounding receivers..................................................................... 26 Figure 12: Noise contours from Gladstone Hill construction activities .................................................................................... 27 Figure 13: Noise contours fromWUG Portal construction activities........................................................................................ 27 Figure 14: Comparison of 50 dB LAeq noise contour extents for early GOP operations (cumulative levels, no mitigation) . 29 Figure 15: Comparison of future and existing Processing Plant noise ..................................................................................... 31 Figure 16: Indicative WUG Portal layout .................................................................................................................................... 32 Figure 17: Indicative plan of NRS location and layout ............................................................................................................... 33 Figure 18: Noise contours for initial NRS works in 2023............................................................................................................ 34 Figure 19: Designation of main tailings storage facilities (TSF1, 2 & 3) .................................................................................... 35 Figure 20: Highest noise emission contours from TSF3 works (2024 scenario) ...................................................................... 36 Figure 21: Example of bund layout around site access ............................................................................................................. 37 Figure 22: Location of Willows SFA and nearby receivers........................................................................................................ 38 Figure 23: Willows Portal, Scenario 1b – Infrastructure development .................................................................................... 39 Figure 24: Proximity of walking tracks and recreational areas to WUG sites .......................................................................... 40 Figure 25: WUG Forest, Scenario 3b – Orebody vent raise construction ................................................................................ 41 Figure 26: WUG Forest, operational noise from ventilation fans ............................................................................................. 42 Figure 27: Calculated helicopter noise levels associated with construction of vent raise sites ............................................. 43 Figure 28: Noise contours for Willows Road trenching works.................................................................................................. 45 Figure 29: Noise contours for SH25/Willows Road intersection roadworks............................................................................ 46 Figure 30: Cumulative noise contour plot year 2024................................................................................................................. 48 Figure 31: Example photographs of loggers installed at MP1 (right) and MP3 (left) .............................................................. 52 Figure 32: Weather history for August 2020 (which covers most survey days) ...................................................................... 52 Figure 33: Indicative noise barrier options in mitigation workshop......................................................................................... 64 SCHEDULE OF TABLES Table 1: Summary of District Plan noise standards from Rule 8.3.1.3(1) ................................................................................. 10 Table 2: Recommended upper limits for construction noise received in residential zones and dwellings in rural areas (Table 2 of NZS 6803).................................................................................................................................................................... 10 Table 3: WHO Guideline Values for the critical health effects of community or environmental noise .................................12 Table 4: Summary of ambient noise monitoring results............................................................................................................ 16 Table 5: Summary of noise measurement data ......................................................................................................................... 19 Table 6: Definition of WNP construction activities..................................................................................................................... 21 Table 7: Summary of modelled operational scenarios for each year ....................................................................................... 23 Table 8: Summary of significant modelling parameters ............................................................................................................ 24 Table 9: Operational noise source data for GOP, TSF3 and NRS models.................................................................................. 24 Table 10: Indicative noise levels for typical construction equipment....................................................................................... 24 Table 11: Construction noise levels around Gladstone Hill and the WUG Portal at select receivers.....................................27 Table 12: WNP Noise levels at all receiver locations.................................................................................................................. 28 Table 14: Indicative tailings storage schedule ............................................................................................................................ 35 Table 15: Modelled scenarios for WUG ...................................................................................................................................... 37 Table 16: Noise source data used in WUG calculations............................................................................................................. 37 Table 17: Calculated noise levels at select dwellings for each model scenario ....................................................................... 38 Table 18: Typical Noise sources included in WUG road work construction calculations ........................................................ 44 Table 19: Survey details for each Measurement Position ......................................................................................................... 52 Table 20: 2024 noise emissions to north-west, with Barriers A-C and source management options ...................................65 Table 21: Noise levels at 33A Heath Road for years 2024-2026, with Barrier D and source management options .............65 SCHEDULE OF NOISE CONTOUR PLOTS Noise contour plot 1: Cumulative noise contours for Waihi North area, year 2024 ............................................................... 67 Noise contour plot 2: Cumulative noise contours for Waihi North area, year 2025 ............................................................... 68 Noise contour plot 3: Cumulative noise contours for Waihi North area, year 2026 ............................................................... 69 Noise contour plot 4: Cumulative noise contours for Waihi North area, year 2027 ............................................................... 70 Noise contour plot 5: Cumulative noise contours for Waihi North area, year 2028 ............................................................... 71 Noise contour plot 6: Cumulative noise contours for Waihi North area, year 2029 ............................................................... 72 Noise contour plot 7: Cumulative noise contours for Waihi North area, year 2030 ............................................................... 73 Noise contour plot 8: Cumulative noise contours for Waihi North area, rehabilitation in years 2031 to 2034....................74 Noise contour plot 9: WUG Willows Portal, Scenario 1a – Site Establishment........................................................................ 75 Noise contour plot 10: WUG Willows Portal, Scenario 1b – Infrastructure Development ..................................................... 76 Noise contour plot 11: WUG Willows Portal, Scenario 2a – Initial Tunnel Drive ..................................................................... 77 Noise contour plot 12: WUG Willows Portal, Scenario 2b – Later Tunnelling ......................................................................... 78 Noise contour plot 13: WUG Willows Portal, Scenario 2c – Tunnelling Night Operations ..................................................... 79
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