U-Park Wyatt Street Temporary Event Space

Transcription

1 Adelaide City Council 26-May-2015 Doc No A15E01RP U-Park Wyatt Street Temporary Event Space Music Noise Assessment

2 U-Park Wyatt Street Temporary Event Space Music Noise Assessment Client: Adelaide City Council ABN: Prepared by AECOM Australia Pty Ltd Level 28, 91 King William Street, Adelaide SA 5000, Australia T F ABN May-2015 Job No.: AECOM in Australia and New Zealand is certified to the latest version of ISO9001, ISO14001, AS/NZS4801 and OHSAS AECOM Australia Pty Ltd (AECOM). All rights reserved. AECOM has prepared this document for the sole use of the Client and for a specific purpose, each as expressly stated in the document. No other party should rely on this document without the prior written consent of AECOM. AECOM undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document. This document has been prepared based on the Client s description of its requirements and AECOM s experience, having regard to assumptions that AECOM can reasonably be expected to make in accordance with sound professional principles. AECOM may also have relied upon information provided by the Client and other third parties to prepare this document, some of which may not have been verified. Subject to the above conditions, this document may be transmitted, reproduced or disseminated only in its entirety.

3 Quality Information Document U-Park Wyatt Street Temporary Event Space Ref Date Prepared by Reviewed by 26-May-2015 Natalie Redmond Simon Moore Revision History Revision Revision Date Details Name/Position Authorised Signature 0 26-May Initial Issue Simon Moore Principal Engineer - Acousitcs

4 Table of Contents Glossary i 1.0 Introduction Music noise criteria Noise modelling Methodology Noise sources Results Noise Emissions Noise Mitigation Noise Contours Discussion 6 Appendix A Residential receiver locations Appendix B Tabulated Noise Levels Appendix C Noise contours A B C

5 i Glossary A-weighting C-weighting db(a) db(c) db(lin) L eq,t L max A-weighting of sound pressure levels is used to approximate the frequency response of the human ear. C-weighting of sound pressure levels is used to approximate the frequency response of the human ear at very high sound levels. Unit for A-weighted sound pressure levels. Unit for C-weighted sound pressure levels. Unit for linear (un-weighted) sound pressure levels. Energy averaged noise level over the measurement period T'. This measure is commonly used when comparing the criterion noise level under environmental noise regulations and for comparison with relevant standards for air conditioning noise. The maximum noise level in a measurement period.

6 1 1.0 Introduction This report presents the results of a music noise assessment undertaken for U-Park Wyatt Street, which is proposed to be used as a temporary event space. It is proposed to hold musical events on the top floor of the car park, with the stage set up in the north-western corner facing south. This site is in close proximity to noise sensitive receivers at the following locations: - Mantra Hindmarsh Square, Hindmarsh Square Hindmarsh Square - Ibis Adelaide, 122 Grenfell Street Pirie Street The aim of the noise modelling is to predict music noise levels at sensitive receivers around the site based on the proposed event layout. Noise levels for all nearby sensitive receivers have been assessed and recommendations for possible noise mitigation strategies that will allow a higher noise level at the event venue without adversely affecting sensitive receivers have been suggested.

7 2 2.0 Music noise criteria In response to community concerns, the Adelaide City Council (ACC) have developed the Event Noise Mitigation Standard Operating Procedures (ENMSOP) which outlines the noise mitigation and procedural requirements for events held within the ACC public realm. The ENMSOP identifies several event types and their associated criteria. The proposed events for the U-Park Wyatt Street would likely be categorised as Events and Festivals with a Music Component. The proposed noise criteria for this event type are summarised in Table 1. Table 1 ACC music noise criteria at the FOH for Events and Festivals with a Music Component Day Time FOH Noise Criteria 1 (L eq,15min) Sunday to Thursday 7:00 am to 10:00pm 85 db(a) 10:01 pm to 6:59 am (the following day) 83 db(a) Friday and Saturday 7:00am to 12:00 am 90 db(a) Note 1: 12:01 am to 6:59 am 85 db(a) (the following day) In the absence of a suitable Front of House ( FOH ) location, the noise criteria are to be applied at a location that is 15 metres from the front of the stage area. For this assessment we have assumed that such an event would be held on a Friday or Saturday night until 12:00 am and outside of business hours. Should the event be held out of these times more stringent criteria from Table 1 would be applicable, and additional noise sensitive receiver locations would need to be assessed (i.e. office spaces and the like). Noise level targets for sensitive receivers have not been specified for Events and Festivals with a Music Component. The following noise goals for noise sensitive receivers are consistent with the superseded Noise Mitigation Standard Operating Procedures and have been adopted as objective criteria for the purpose of this modelling exercise: - 65 db(a) L eq,15min and 80 db(a) L max between 7:00 am and 12:00 am db(a) L eq,15min and 65 db(a) L max between 12:01 am and 6:59 am db(lin) L eq 15min in either of the 31.5, 63 or 125 Hz octave bands. Note that the higher receiver noise level targets for the Adelaide East End were adopted as the background noise environment would be similar to the proposed Wyatt Street location.

8 3 3.0 Noise modelling 3.1 Methodology Noise modelling was undertaken using SoundPLAN Version noise modelling software. The noise model for the U-Park Wyatt Street has been based on the proposal and typical stage layouts of similar events with a music component. The noise model utilised a 3D model of buildings within the ACC boundary supplied by the ACC in May 2014 and topographical information for the surrounding area. The model also included the proposed stage location, existing ventilation openings in the car park building, nearest sensitive receiver locations and ground absorption. 3.2 Noise sources The sound source levels were modelled based on achieving the FOH noise criteria for Events and Festivals with a Music Component, which is 90 db(a) L eq at 15 metres as described in Table 1. The octave band source spectrum levels modelled are presented in Table 2. Table 2 Modelled octave band source levels at FOH mixing desk Location L eq level at octave band centre frequency in Hz, db(a) Overall L eq FOH Noise Levels k 2k 4k 8k db(a) SoundPLAN 7.3 is a suite of environmental noise propagation programs.

9 4 4.0 Results 4.1 Noise Emissions Appendix A shows the location of sensitive receivers in relation to the Wyatt Street U-Park. Additionally, a summary of the sensitive receiver locations for each building is listed below: - Mantra Hindmarsh Square, eight floors of residential Hindmarsh Square, nine floors of residential - IBIS Hotel, sixteen floors of residential Pirie Street, nine floors of residential Table 3 summarises the highest predicted noise level for each building. Tabulated results for all modelled receiver locations are included in Appendix B. Table 3 Predicted noise levels summary, highest receiver at each building Receiver location Hindmarsh Square Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 37 m elevation (south façade) Pirie Street 40 m elevation (north façade) IBIS Hotel 44 m elevation (south façade) Mantra Hindmarsh Square 22 m elevation (west façade) Noise Mitigation Historically event organisers have desired FOH noise levels of greater than 90 db(a). In order to cater for this, we have modelled a scenario with conceptual noise mitigation in place. This will aid in determining if the installation of noise mitigation will allow for levels to be increased without exceeding criteria at noise sensitive receiver locations. The recommended noise mitigation is to temporarily board up the ventilation openings on the top floor of the eastern façade and the first 20 metres of the western façade (from the northern end). Materials such as plywood, plasterboard or sheet metal with a minimum surface density of 5 kg/m 2 can be used. Table 4 summarises the highest predicted noise level for each building. Tabulated results for all modelled receiver locations are included in Appendix B.

10 5 Table 4 Predicted noise levels with mitigation summary, highest receiver at each building Receiver location Hindmarsh Square Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 37 m elevation (south façade) Pirie Street 40 m elevation (north façade) IBIS Hotel 53 m elevation (south façade) Mantra Hindmarsh Square 28 m elevation (west façade) Noise Contours Predicted noise contours for U-Park Wyatt Street have been included in Appendix C. Noise contours have been produced for the overall predicted noise levels at both 25 and 45 metres above ground level, for the scenarios with and without noise mitigation.

11 6 5.0 Discussion The noise modelling results in Section 4.1 suggest that compliance with the music noise criteria is achievable without noise mitigation assuming the spectrum shape in Table 2. However, from previous event noise monitoring experience, the FOH noise level criteria of 90 db(a) may not be suitable for a night club style of event, as higher noise levels may be desirable. With noise mitigation the modelling results in Section 4.2 suggest that FOH levels may be increased by 5 db(a) assuming the same spectrum shape. Therefore, the suggested allowable noise limit is 95 db(a) when measured at a distance of 15 metres from the stage and/or speakers. Note that the outcome of this is controlled by the low frequency noise limit. If low frequency noise levels are less than the modelled octave band levels, it may be allowable for FOH levels to increase beyond this 5 db(a) margin. However, this would need to be confirmed through monitoring at the event. Existing ambient sound levels at the proposed location within the CBD, and the temporary nature of the proposed event, may also be grounds for further increasing the proposed music noise limits, but this would be reviewed on a case-by-case basis.

12 Appendix A Residential receiver locations

13 A-1 Appendix A Residential receiver locations Mantra Hindmarsh Sq 147 Pirie St Hindmarsh Sq IBIS Hotel U-Park Wyatt St Receiver Locations Louvered openings

14 Appendix B Tabulated Noise Levels

15 B-1 Appendix B Tabulated Noise Levels Table 5 Predicted Noise Levels - No Mitigation Receiver location Hindmarsh Square Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 34 m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south Pirie Street 12 m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north IBIS Hotel 10 m elevation - south m elevation south m elevation south m elevation south

16 B-2 Receiver location Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 23 m elevation south m elevation south m elevation south m elevation south m elevation south m elevation - south m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south Mantra Hindmarsh Square 6 m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end)

17 B-3 Table 6 Predicted Noise Levels With Noise Mitigation Receiver location Hindmarsh Square Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 34 m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west m elevation west Pirie Street 12 m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north m elevation north IBIS Hotel 10 m elevation - south m elevation south m elevation south m elevation south m elevation south

18 B-4 Receiver location Overall music noise level, db(a) Noise level at octave band centre frequency, db(lin) L eq 31.5 Hz 63 Hz 125 Hz 26 m elevation south m elevation south m elevation south m elevation south m elevation - south m elevation south m elevation south m elevation south m elevation south m elevation south m elevation south Mantra Hindmarsh Square 6 m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, north end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end) m elevation (west, south end)

19 Appendix C Noise contours

20 IBIS Hotel OpenStreetMap (and) contributors, CC-BY-SA AECOM does not warrant the accuracy or completeness of information displayed in this map and any person using it does so at their own risk. AECOM shall bear no responsibility or liability for any errors, faults, defects, or omissions in the information metres DATUM GDA 1994, PROJECTION MGA ZONE 54 1:1,500 (when printed at A3) LEGEND U-Park Wyatt Street Noise Sensitive Receivers Buildings Leq,15min 40 db(a) 42 db(a) 44 db(a) 46 db(a) Hindmarsh Square Mantra Hindmarsh Square 147 Pirie Street 48 db(a) 58 db(a) 50 db(a) 60 db(a) 52 db(a) 62 db(a) 54 db(a) 64 db(a) 56 db(a) 66 db(a) U-Park Wyatt Street Event Noise Modelling 90 db(a) Noise Source, 25m AGL No Noise Mitigation PROJECT ID CREATED BY LAST MODIFIED AC SGM - 26/05/2015 Map 1 A3 size

21 IBIS Hotel OpenStreetMap (and) contributors, CC-BY-SA AECOM does not warrant the accuracy or completeness of information displayed in this map and any person using it does so at their own risk. AECOM shall bear no responsibility or liability for any errors, faults, defects, or omissions in the information metres DATUM GDA 1994, PROJECTION MGA ZONE 54 1:1,500 (when printed at A3) LEGEND U-Park Wyatt Street Noise Sensitive Receivers Buildings Leq,15min 40 db(a) 42 db(a) 44 db(a) 46 db(a) Hindmarsh Square Mantra Hindmarsh Square 147 Pirie Street 48 db(a) 58 db(a) 50 db(a) 60 db(a) 52 db(a) 62 db(a) 54 db(a) 64 db(a) 56 db(a) 66 db(a) U-Park Wyatt Street Event Noise Modelling 90 db(a) Noise Source, 45m AGL No Noise Mitigation PROJECT ID CREATED BY LAST MODIFIED AC SGM - 26/05/2015 Map 2 A3 size

22 IBIS Hotel OpenStreetMap (and) contributors, CC-BY-SA AECOM does not warrant the accuracy or completeness of information displayed in this map and any person using it does so at their own risk. AECOM shall bear no responsibility or liability for any errors, faults, defects, or omissions in the information metres DATUM GDA 1994, PROJECTION MGA ZONE 54 1:1,500 (when printed at A3) LEGEND U-Park Wyatt Street Noise Sensitive Receivers Buildings Leq,15min 40 db(a) 42 db(a) 44 db(a) 46 db(a) Hindmarsh Square Mantra Hindmarsh Square 147 Pirie Street 48 db(a) 58 db(a) 50 db(a) 60 db(a) 52 db(a) 62 db(a) 54 db(a) 64 db(a) 56 db(a) 66 db(a) U-Park Wyatt Street Event Noise Modelling 90 db(a) Noise Source, 25m AGL With Noise Mitigation PROJECT ID CREATED BY LAST MODIFIED AC SGM - 26/05/2015 Map 3 A3 size

23 IBIS Hotel OpenStreetMap (and) contributors, CC-BY-SA AECOM does not warrant the accuracy or completeness of information displayed in this map and any person using it does so at their own risk. AECOM shall bear no responsibility or liability for any errors, faults, defects, or omissions in the information metres DATUM GDA 1994, PROJECTION MGA ZONE 54 1:1,500 (when printed at A3) LEGEND U-Park Wyatt Street Noise Sensitive Receivers Buildings Leq,15min 40 db(a) 42 db(a) 44 db(a) 46 db(a) Hindmarsh Square Mantra Hindmarsh Square 147 Pirie Street 48 db(a) 58 db(a) 50 db(a) 60 db(a) 52 db(a) 62 db(a) 54 db(a) 64 db(a) 56 db(a) 66 db(a) U-Park Wyatt Street Event Noise Modelling 90 db(a) Noise Source, 45m AGL With Noise Mitigation PROJECT ID CREATED BY LAST MODIFIED AC SGM - 26/05/2015 Map 4 A3 size