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 4 of 79 1.0 INTRODUCTION ..................................................................................6 1.1 How we have Assessed the Project...................................................7 2.0 EXISTING NOISE PERFORMANCE STANDARDS.................................8 2.1 Current Consents ................................................................................8 2.2 Hauraki District Plan .........................................................................10 2.3 General Noise Guidance...................................................................12 2.4 Effects of Noise on Fauna.................................................................13 2.5 WUG Helicopter Noise .....................................................................13 3.0 EXISTING NOISE ENVIRONMENT.....................................................14 3.1 Existing Township Noise Measurement Data (OGNZL) .................14 3.2 Waihi Noise Monitoring Survey (MDA)...........................................16 3.3 WUG Surface Facilities Area – Ambient Noise Levels ....................19 4.0 RECOMMENDED NOISE CRITERIA...................................................21 4.1 Recommended Construction Noise Limits .....................................21 4.2 Recommended Operational Noise Limits.......................................22 5.0 NOISE CALCULATIONMETHODOLOGY...........................................23 5.1 Noise Modelling Software................................................................23 5.2 Construction Noise ...........................................................................24 5.3 Helicopter Noise ...............................................................................25 6.0 GLADSTONE AND PROCESSING PLANT NOISE CALCULATIONS ....26 6.1 Gladstone Open Pit (GOP) ...............................................................26 6.2 Construction Activities .....................................................................27 6.3 Operational Noise Emissions ...........................................................28 6.4 Processing Plant................................................................................30 6.5 WUG Portal .......................................................................................32 6.6 Ngati Koi Domain and Other Recreation Areas..............................32 7.0 NORTHERN ROCK STACK NOISE CALCULATIONS ...........................33 8.0 TAILINGS STORAGE FACILITIES NOISE CALCULATIONS..................35 8.1 Tailings Storage Facility 3 .................................................................35 9.0 WUG NOISE CALCULATIONS............................................................37 9.1 Calculation Details ............................................................................37 9.2 Willows SFA Noise Calculation Results............................................38 9.3 Ventilation Raise Noise Emissions ...................................................40 9.4 Predicted Helicopter Noise Levels...................................................43 9.5 Off-site Construction Noise Calculations ........................................44 10.0 WNP NOISE LEVELS OVER TIME AND ASSESSMENT...................... 47 10.1 Calculated Noise Levels.................................................................... 47 10.2 Cumulative Effects with Martha operations .................................. 47 10.3 Assessment of Effects ...................................................................... 47 11.0 GENERAL NOISE MITIGATION AND MANAGEMENT MEASURES . 49 11.1 Noise Barriers ................................................................................... 49 11.2 Receiver Building Mitigation ........................................................... 49 11.3 Management of Plant and Equipment ........................................... 49 11.4 Helicopter Noise............................................................................... 49 11.5 Noise Management.......................................................................... 49 12.0 CONCLUSION .................................................................................... 50 12.1 Gladstone.......................................................................................... 50 12.2 NRS .................................................................................................... 50 12.3 TSF3 ................................................................................................... 50 12.4 WUG.................................................................................................. 50 APPENDIX A GLOSSARY OF TERMINOLOGY APPENDIX B AMBIENT NOISE SURVEYS APPENDIX C GLADSTONE STRUCTURAL NOISE MITIGATION ANALYSIS APPENDIX D WNP NOISE CONTOUR PLOTS (EXCLUDINGWUG) APPENDIX E WUG NOISE CONTOUR PLOTS TABLE OF CONTENTS
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