SYDNEY METRO CITY & SOUTHWEST-TSE WORKS

Transcription

1 Acoustics Vibration Structural Dynamics SYDNEY METRO CITY & SOUTHWEST-TSE WORKS Construction Noise and Vibration Impact Statement: Local Area & Utility Works - Bligh Street 8 March 2018 John Holland CPB Ghella Joint Venture TH F01 BL CNVIS LAUW (r3) Sydney Melbourne Brisbane Gold Coast Kuwait Renzo Tonin & Associates (NSW) Pty Ltd ABN Level 1/418A Elizabeth St SURRY HILLS NSW 2010 PO Box 877 STRAWBERRY HILLS NSW 2012 P (02) F (02) sydney@renzotonin.com.au

2 Document details Detail Doc reference: Prepared for: Address: Attention: Reference TH F01 BL CNVIS LAUW (r3) John Holland CPB Ghella Joint Venture Level 3, 140 Sussex Street Sydney NSW 2000 Dr Caitlin Richards Document control Date Revision history Non-issued revision Issued revision Prepared Instructed Authorised Draft for review 0 - DM ALe CW Final - 1 DM ALe CW Addition of oversized deliveries and crane lifts Update to include weekend crane works - 2 MN CW CW - 3 MN CW CW Important Disclaimer:- The work presented in this document was carried out in accordance with the Renzo Tonin & Associates Quality Assurance System, which is based on Australian Standard / NZS ISO This document is issued subject to review and authorisation by the Team Leader noted by the initials printed in the last column above. If no initials appear, this document shall be considered as preliminary or draft only and no reliance shall be placed upon it other than for information to be verified later. This document is prepared for the particular requirements of our Client referred to above in the Document details which are based on a specific brief with limitations as agreed to with the Client. It is not intended for and should not be relied upon by a third party and no responsibility is undertaken to any third party without prior consent provided by Renzo Tonin & Associates. The information herein should not be reproduced, presented or reviewed except in full. Prior to passing on to a third party, the Client is to fully inform the third party of the specific brief and limitations associated with the commission. In preparing this report, we have relied upon, and presumed accurate, any information (or confirmation of the absence thereof) provided by the Client and/or from other sources. Except as otherwise stated in the report, we have not attempted to verify the accuracy or completeness of any such information. If the information is subsequently determined to be false, inaccurate or incomplete then it is possible that our observations and conclusions as expressed in this report may change. We have derived data in this report from information sourced from the Client (if any) and/or available in the public domain at the time or times outlined in this report. The passage of time, manifestation of latent conditions or impacts of future events may require further examination and re-evaluation of the data, findings, observations and conclusions expressed in this report. We have prepared this report in accordance with the usual care and thoroughness of the consulting profession, for the sole purpose described above and by reference to applicable standards, guidelines, procedures and practices at the date of issue of this report. For the reasons outlined above, however, no other warranty or guarantee, whether expressed or implied, is made as to the data, observations and findings expressed in this report, to the extent permitted by law. The information contained herein is for the purpose of acoustics only. No claims are made and no liability is accepted in respect of design and construction issues falling outside of the specialist field of acoustics engineering including and not limited to structural integrity, fire rating, architectural buildability and fit-for-purpose, waterproofing and the like. Supplementary professional advice should be sought in respect of these issues. ii

3 Contents 1 Introduction Relevant requirements and purpose of this CNVIS Structure of this CNVIS Quality assurance 2 2 Description of construction works and hours Summary of works addressed in this CNVIS Construction hours Justification for OOHW 4 3 Nearest sensitive receivers Residential receivers Other sensitive receivers (Condition E34) Commercial and industrial premises Heritage receivers 6 4 Construction noise and vibration objectives Noise goals Noise management levels Residential receivers in residential and non-residential zones (Conditions E41 and E42) Respite for high noise impact works (Conditions E37 and E38) Sleep disturbance National Standard for exposure to noise Vibration goals Disturbance to building occupants (human annoyance) Structural damage to buildings Heritage Sensitive Scientific and Medical Equipment Utilities and Other Vibration Sensitive Structures Construction related road traffic noise objectives 13 5 Construction noise assessment Detailed design outcomes Noise prediction methodology Predicted noise levels Construction Other sensitive receivers (Condition E34) Noise mitigation and management Other noise control measures Additional noise mitigation measures 19 iii

4 5.4.3 Attended noise monitoring Complaints handling 21 6 Construction vibration impacts Minimum buffer distances for vibration intensive plant Vibration assessment Structural damage Human annoyance Vibration mitigation measures Vibration control and management measures Additional vibration mitigation measures Vibration monitoring Complaints handling 26 7 Ground-borne noise assessment 27 8 Traffic noise assessment 28 9 Cumulative impacts Conclusion 30 References 31 APPENDIX A Glossary of terminology 32 APPENDIX B Nearest sensitive receivers and noise management levels 34 APPENDIX C Construction timetable/ activities/ management 38 APPENDIX D Detailed predicted noise levels 40 APPENDIX E Additional noise mitigation 43 List of tables Table 2.1: Construction hours 4 Table 3.1: Assessed heritage receivers 6 Table 4.1: Construction Vibration Disturbance Goals 11 Table 5.1: Assessed construction works 15 Table 5.2: Summary of construction noise impacts Site establishment works 16 Table 5.3: E34 affected receiver locations 18 Table 5.4: Site noise control measures 18 Table 5.5: Additional airborne noise mitigation measures 20 Table 5.6: Nominated verification monitoring locations 21 Table 6.1: Minimum working distances (m) for cosmetic damage (continuous vibration). 22 Table 6.2: Minimum working distances (m) for human annoyance (continuous vibration). 23 Table 6.4: Number of buildings within buffer distances for human annoyance. 24 Table 6.5: Site vibration control measures. 25 iv

5 Table 6.6: Additional vibration mitigation measures 25 Table 6.7: Attended vibration monitoring - nominated representative locations. 26 v

6 1 Introduction This Construction Noise and Vibration Impact Statement (CNVIS) has been prepared on behalf of John Holland CPB Ghella Joint Venture (JHCPBG JV) in accordance with the Construction Noise and Vibration Management Plan (CNVMP) [SMCSWTSE-JCG-TPW-EM-PLN ] [1], for the Design and Construction of the Tunnel and Station Excavation (TSE) Works of the Sydney Metro City & Southwest Project (the Project). 1.1 Relevant requirements and purpose of this CNVIS Condition E33 from the Project Planning Conditions of Approval requires that: Construction Noise and Vibration Impact Statements must be prepared for each construction site before construction noise and vibration impacts commence and include specific mitigation measures identified through consultation with affected receivers. This CNVIS details the noise and vibration mitigation measures in relation to utility supply, relocation and local area works required for the construction and operation of the Sydney Metro Chatswood to Sydenham site at Bligh Street. This includes supporting services for the site and site access changes. This CNVIS covers construction works outside standard construction hours. Construction hours are defined by the Project Conditions of Approval, outlined in the CNVMP. This CNVIS forms part of the CNVMP for the Project. 1.2 Structure of this CNVIS This CNVIS is structured as follows: Section 2 - Description of construction works and hours Section 3 - Nearest sensitive receivers Section 4 - Construction noise and vibration objectives Section 5 - Construction noise assessment Section 6 - Construction vibration impacts Section 7 - Ground-borne noise assessment Section 8 - Traffic noise assessment Section 9 Cumulative impacts 1

7 1.3 Quality assurance The work documented in this report was carried out in accordance with the Renzo Tonin & Associates Quality Assurance System, which is based on Australian Standard / NZS ISO Appendix A contains a glossary of acoustic terms used in this report. 2

8 2 Description of construction works and hours 2.1 Summary of works addressed in this CNVIS This CNVIS provides an assessment of noise and vibration impacts from activities associated with local area and utility works (LAUW) on Bligh Street, Hunter Street and O'Connell Street, near the Bligh Street worksite. The works will be Out-of-Hours Works (OOHW) under a Road Occupancy Licence (ROL). The LAUW are expected to occur between October and December As much of the works are linear progressive works, any one receiver location will only be exposed to higher noise levels for a small part of this construction period. The periods for the works stages are as described in Table C1 of APPENDIX C. The proposed works involve: providing site access points (driveways) on Bligh Street and O'Connell Street providing an underground high voltage supply for roadheaders which will operate at the site. This involves about 60m of trenching along Bligh Street and Hunter Street Vegetation clearing at the corner of Bligh Street and Hunter Street Delivery of oversized plant (includes semi-trailer low loader and tonne excavators tracking off float) from O Connell Street via oversized delivery truck to site, and Crane lift ( tonne) of steel for the acoustic shed, steel structure frame for amenities and office, and amenities blocks. Crane set up will be on either O Connell or Bligh St during daytime and night-time periods (less than 10 nights/month). Figure B1 (APPENDIX B) illustrates the locations of the proposed works, which will be undertaken during OOHW periods. To complete these works, the following stages/activities have been assessed by this CNVIS: - Site establishment, including installation of laybacks and driveways - Service identification - Utilities relocation (high voltage supply installation) - Vegetation clearing to support utilities installation. - Delivery of oversized plant - Crane works 3

9 2.2 Construction hours The construction hours for the Project are defined by Project Planning Approval Conditions E36, E37, E38, E41, E42 and E44. The standard hours and out-of-hours work (OOHW) periods are depicted in Table 2.1 below. The OOHW periods are further defined as OOHW Period 1 and 2 based on the TfNSW's Construction Noise Strategy (TfNSW CNS), as noted in the CNVMP. Table 2.1: Construction hours An additional OOHW Shoulder Period has been identified for assessing and managing the OOHW assessed in this CNVIS. OOHW Shoulder (10 pm 12 am) The establishment of a shoulder period is based on a review of available background noise levels from the EIS [3]. Existing background noise levels are generally controlled by building services plant and urban hum. Noise logging results indicate that background noise levels remain steady or marginally decrease in the early night between 10 pm to 12 am, and decrease to minimum levels around 1 am to 2 am. As such, it would be unduly stringent to apply stricter night criteria during these periods. Accordingly, shoulder periods have been derived in line with guidance in the EPA Industrial Noise Policy (INP) (Section 3.3) so that the assessment noise management levels (NMLs) are consistent with existing background noise levels during these assessment periods Justification for OOHW According to the Condition L4.3 of the Project s Environment Protection Licence, the delivery of oversized plant outside of standard hours is permitted under the following clause: L4.3 Exemptions to standard construction hours in exceptional circumstances (a) The licensee may undertake works outside of standard construction hours if any of the following applies: 4

10 (i) emergency works is required to avoid the loss of lives or property, or to prevent material harm to the environment; (ii) the delivery of oversized plant or structures has been determined by the police or other authorised authorities to require special arrangements to transport along public roads. The LAUW works will need to take place under a Road Occupancy Licence and will take place outside of standard construction hours to ensure: The safety of construction personnel when working within the road alignment. Road Occupancy Licences (ROL) will be required to undertake works, and Minimised disruption to pedestrians, road users and traffic volumes during the works Project Approval conditions allow for construction work to be undertaken outside standard construction hours, under defined circumstances, as outlined in Condition E44. As outlined in Section Out of hours work under Road Occupancy Licence in the CNVMP [1], works such as those assessed in this report require a Road Occupancy Licence (ROL). Due to the importance of the road to the functionality of the road network, this often precludes or restricts access to the work area before 10 pm, and so construction works need to be carried out during the night period, or OOHW Period 2. The conditions of Road Occupancy Licences can vary and is dependent on existing road traffic volumes. At Bligh Street, the commencement of construction activities which require ROLs are not likely to occur prior to 8 pm. Where possible, and subject to ROL requirements, traffic management would be set up prior to 8 pm and construction activities with elevated noise levels undertaken as early as possible during the evening and night-time period to minimise impacts on nearby residential receivers. All OOHW works will be managed in accordance with the Out of Hours Works Protocol which has been prepared for the project in accordance with Condition E47. 5

11 3 Nearest sensitive receivers 3.1 Residential receivers To assess and manage construction noise and vibration impact, residential areas around the Project worksites have been divided into Noise Catchment Areas (NCAs) based on each area s similar acoustic environment prior to the commencement of construction works. The NCAs are based on those established in the EIS for the Project [3], with some modifications to allow for site specific characteristics. The nearest residential sensitive receiver is about 350 m from the nearest work site. At that distance, in the highly urban area surrounding the work sites, potential construction noise and vibration levels are expected to be within the adopted noise and vibration management levels described in Section 4 of this CNVIS. Residential receivers are not assessed in detail in this CNVIS. 3.2 Other sensitive receivers (Condition E34) As well as residential receivers, there are other noise and vibration sensitive receivers (such as educational institutions, hotels, restaurants, medical facilities, places of worship and recreational areas) around the construction sites. The nearest sensitive receivers are summarised in APPENDIX B. 3.3 Commercial and industrial premises All commercial and industrial premises near the worksite have been considered in this assessment. 3.4 Heritage receivers Heritage receivers have also been identified in the Land Use Survey in Annexure B of the CNVMP. Ten heritage-listed structures are close to the work areas: Table 3.1: Assessed heritage receivers Name Address/Location Significance Bennelong Stormwater Channel No 29 Bligh Street / Castlereagh Street State Richard Johnson Square including monument and plinth Bligh Street Local Wentworth Hotel 2 Bligh Street / Phillip Street Local Former City Mutual Life Assurance building 10 Bligh Street / 66 Hunter Street Local Former NSW Club building 31 Bligh Street State Former QANTAS House Hunter Street State Chifley Square Chifley Square Local Public Trust Office O Connell Street State Former Wales House (Radisson Hotel) Pitt Street State Former Perpetual Trustee building Hunter Street State Note: 1. These items were not identified in the CNVMP, but are included here because they are close to the worksites addressed in this CNVIS. 6

12 4 Construction noise and vibration objectives 4.1 Noise goals Noise management levels Construction noise management levels have been determined using the NSW Interim Construction Noise Guideline (ICNG) [4]. Table B1 in APPENDIX B identifies the adopted construction noise management levels (NMLs) for the nearest noise sensitive receivers to the worksite, including for airborne and ground-borne noise. The airborne NMLs for residential receivers are based on long-term noise logging conducted by SLR on behalf of Transport for NSW (TfNSW) to quantify ambient noise levels for the Environmental Impact Statement (EIS) [3]. Additional pre-construction noise monitoring was carried out to establish more accurate noise goals as outlined in Section 6.2 of the CNVMP. This additional long-term, unattended noise monitoring was carried out in July 2017 by RT&A following a review of the EIS noise monitoring. The NMLs for other sensitive receivers are from the ICNG, as reported in Section of the CNVMP. Receivers are considered noise affected where construction noise levels are greater than the noise management levels in APPENDIX B. The noise affected level represents the point above which there may be some community reaction to noise. Where predicted and/or measured construction noise levels exceed NMLs, all feasible and reasonable work practices will be applied to meet the NMLs. During standard construction hours, a highly affected noise objective of L Aeq(15min) 75 db(a) applies in relation to airborne noise at all receivers. In addition to the objectives identified in APPENDIX B, where construction activities are tonal or impulsive in nature and are described in the ICNG as being particularly annoying, a +5dB(A) correction must be added to the activity noise, in accordance with Conditions of Approval E37, E38, E41 and E42. Activities defined in the ICNG as particularly annoying include, but are not limited to: beeper style reversing or movement alarms; power sawing; vibratory rolling; jack hammering, rock hammering or rock breaking; impact piling. If construction works include ground-borne noise or a perceptible level of vibration at the affected receiver, a 5 db(a) penalty should be added to the predicted construction noise level. Any construction related activities that could exceed the NMLs are identified and managed in accordance with the CNVMP. 7

13 4.1.2 Residential receivers in residential and non-residential zones (Conditions E41 and E42) Condition E41 requires that residential receivers within non-residential zones do not exceed the following internal noise levels (including a 5 db(a) penalty if considered an annoying activity). L Aeq(15minute) 60 db(a) between 8pm and 9pm L Aeq(15minute) 45 db(a) between 9pm and 7am. Condition E42 requires that residential receivers within residential zones do not exceed internal noise levels of L Aeq(15minute) 45 db(a) (inclusive of a 5 db(a) penalty if considered an annoying activity) between 8pm and 7am. Where the above internal noise levels cannot be achieved, additional mitigation must be offered in accordance with the Sydney Metro City and South West Noise and Vibration Strategy (SMCSNVS) [7]. Addendum A of the SMCSNVS notes that zoning will be used to identify if residential receivers are located within residential or non-residential zones. Figure 4.1 is an extract from the Sydney Local Environmental Plan 201 land zoning map LZN_014 (accessed 10/10/2017). As shown in Figure 4.1, the nearest receivers are in non-residential zones (B8 Metropolitan Centre and RE1 Public Recreation). For this assessment, all residential receivers are conservatively assumed to be in residential zones, with a corresponding internal noise threshold level of L Aeq(15minute) 45 db(a) between 8pm and 7am. Based on a minimum (conservative) external to internal noise difference of 10 db(a) (assuming windows open), an equivalent external noise threshold of L Aeq(15minute) 55 db(a) applies between 8pm and 7am. Where this level is exceeded, additional mitigation will be offered in accordance with the SMCSNVS. This CNVIS has assessed all receivers using the approach outlined in the SMCSNVS [8] and CNVMP [1] which achieves the requirements of conditions E41 and E42, and is consistent with the ICNG [4] and the EIS [3]. As identified in Section 3.1, all residential receivers are at least 350 m from the work sites, and in the highly urban environment being considered, construction noise levels at those receivers are expected to meet the noise management levels. This means that application of conditions E41 and E42 will not result in any additional management or mitigation measures. 8

14 Figure 4.1: Extract from Sydney Local Environmental Plan 2012 land zoning map LZN_014 Bligh Street Site Respite for high noise impact works (Conditions E37 and E38) Some noise impacts are unavoidable during the proposed works, as there is limited opportunity to install physical noise mitigation measures. For construction works which do not need a Road Occupancy Licence (ROL), respite from high noise impact activities will be provided by limiting activities as follows to satisfy standard EPL Conditions: Between the hours of 8:00am to 6:00pm Monday to Friday Between the hours of 8:00am to 1:00pm Saturday, and In continuous blocks not exceeding three hours each with a minimum respite from those activities and works of not less than one hour between each block, except as expressly permitted by the EPL issued for the TSC Works. For the purposes of this requirement continuous includes any period during which there is less than one-hour respite between ceasing and recommencing any of the work that is subject to this requirement. 9

15 As noted in Section 2.2.1, some of the works assessed in this report are required to be undertaken under an ROL for safety reasons and to minimise disruption to road users. At Bligh Street the commencement of construction activities which require ROLs are not likely to occur prior to 8 pm (except crane works which occur during weekend days). On this basis, consultation with affected receivers in accordance with Approval Conditions E37 and E38 to determine appropriate hours of respite between 7 am and 8 pm is not required for ROL works which commence after 8 pm. For crane works which occur during weekend days, no consultation will be undertaken since all receivers are predicted to experience internal noise levels less than L Aeq(15minute) 60 db(a), between 7am and 8pm, Receivers have been identified using the following process: An external noise threshold equivalent to an internal noise level of L Aeq(15minute) 60 db(a) was established for all identified receivers: For residential receivers, the equivalent external noise threshold is based on a 10 db(a) minimum (conservative) difference between external and internal noise levels (assuming windows open) For non-residential receivers with light weight glazing, the equivalent external noise threshold is based on a 20 db(a) minimum (conservative) difference between external and internal noise levels (assuming windows closed) For non-residential receivers with heavy glazing, the equivalent external noise threshold is based on a 25 db(a) minimum (conservative) difference between external and internal noise levels (assuming windows closed) Where additional information is available (e.g. if residential or non-residential properties have been acoustically treated), alternative outdoor to indoor noise difference will be determined to establish the equivalent external noise threshold Receivers predicted to exceed the equivalent external noise threshold will be identified in Appendix E as requiring consultation. Subject to any other relevant requirements of the Environment Protection Licence (EPL) (not yet issued) Sleep disturbance The ICNG recommends that where construction works are planned to extend over more than two consecutive nights, maximum noise levels and the extent and frequency of maximum noise level events exceeding the RBL should be considered. To assess the likelihood of sleep disturbance, an initial screening level of (L Amax or L A1(1min)) L A90(15min) + 15 db(a) is used. In situations where this results in an external screening level of less than 55 db(a), a minimum screening level of 55 db(a) is set, as noted in Section of the CNVMP. Note that this is equivalent to a maximum internal noise level of 45 db(a) with windows open. 10

16 Where there are noise events found to exceed the initial screening level, further analysis is made to identify: the likely number of events that might occur during the night assessment period whether events exceed an 'awakening reaction' level of 55 db(a) L Amax (internal) that equates to NML of L Amax or L A1 (1minute) 65 db(a) (assuming open windows). The ICNG recommends that where construction works are planned to extend over more than two consecutive nights, maximum noise levels and the extent and frequency that maximum noise levels exceed the RBL should be analysed National Standard for exposure to noise In accordance with Project Planning Approval Condition E43, TSE worksites will be managed to ensure that noise generated by construction will not exceed the National Standard for exposure to noise in the occupational environment of an eight-hour equivalent continuous A-weighted sound pressure level of LAeq,8h, of 85 db(a) for any employee working at a location near a TSE worksite 4.2 Vibration goals As reported in Section 5.6 and 5.7 of the CNVMP, construction vibration goals have been determined in accordance with Project Planning Condition E28 and the Sydney Metro Construction Noise and Vibration Strategy as follows: Human annoyance - the acceptable vibration values set out in the NSW 'Environmental Noise Management Assessing Vibration: A Technical Guideline' (Department of Environment and Conservation, 2006) [5]; and Structural damage - the vibration limits set out in the British Standard 7385 Part 2 (1993) [6] Disturbance to building occupants (human annoyance) For disturbance to human occupants of buildings, we refer to the NSW Assessing Vibration; a technical guideline [5]. This document provides criteria which are based on the British Standard BS , Evaluation of human exposure to vibration in buildings (1-80Hz) [7]. Intermittent vibration is assessed using vibration dose values (VDVs). For the assessment of potential vibration at the nearest vibration sensitive receivers preferred and maximum VDV goals for the day period (7:00am to 10:00pm) are presented in Table 4.1. Table 4.1: Construction Vibration Disturbance Goals Location Assessment period 1 Vibration Dose Value (VDV), m/s 1.75 Preferred values Maximum values Critical areas 2 Day or Night

17 Location Assessment period 1 Vibration Dose Value (VDV), m/s 1.75 Preferred values Maximum values Residences Hotel sleeping areas Offices, schools, educational institutions and places of worship Day Night Day or Night Workshops Day or Night Notes: 1. Daytime is 7:00am to 10:00pm and night-time is 10:00pm to 7:00am 2. Examples include hospital operating theatres and precision laboratories where sensitive operations are occurring. These criteria are only indicative, and there may be a need to assess intermittent values against the continuous or impulsive criteria for critical areas. Source: BS Structural damage to buildings A conservative vibration damage screening level per receiver type is given below: Reinforced or framed structures (Line 1): 25.0 mm/s Unreinforced or light framed structures (Line 2): 7.5 mm/s At locations where the predicted and/or measured vibration levels are greater than shown above (peak component particle velocity), a more detailed analysis of the building structure, vibration source, dominant frequencies and dynamic characteristics of the structure would be required to determine the applicable safe vibration level Heritage As noted in the CNVMP, the approach to manage potential vibration impact shall be to: 1. Identify heritage items where the 2.5 mm/s peak component particle velocity objective may be exceeded during specific construction activities 2. Structural engineering report to be undertaken on identified heritage items, to confirm structural integrity of the building and confirm if item is structurally sound 3. If item confirmed as structurally sound, the screening criteria in Section shall be adopted, or 4. If item confirmed as structurally unsound, the more conservative cosmetic damage objectives of 2.5 mm/s peak component particle velocity would be adopted Sensitive Scientific and Medical Equipment No receivers have been identified that use vibration sensitive scientific or medical equipment near the work sites. If they are identified, relevant vibration criteria should be established for each item in line with Section of the CNVMP [1], and any corresponding management or mitigation measures determined Utilities and Other Vibration Sensitive Structures Bennelong Stormwater Channel No 29 will be managed as a heritage item as described in section

18 No other vibration sensitive structures have been identified near the work sites. If they are identified, relevant vibration criteria should be established for each item in line with Section of the CNVMP [1], and any corresponding management or mitigation measures determined Construction related road traffic noise objectives On roads near the construction site, the community may associate heavy vehicle movements with the Sydney Metro TSE works. Construction traffic movements on public roads will aim to limit any increase in existing road traffic noise levels to no more than 2 db(a). All feasible and reasonable noise mitigation and management measures shall be implemented. 13

19 5 Construction noise assessment 5.1 Detailed design outcomes During the development of the site design, Renzo Tonin & Associates played a key role in assisting JHCPBG JV to determine the physical noise mitigation measures required to reduce noise impact from the local area and utility works at CDS. The following sections describe briefly the noise design methodology and outcomes. The design input assumptions and management measures form part of the noise mitigation and management measures for the worksite and are outlined in: Table C1 in APPENDIX C sets out the noise model input assumptions; Table C2 in APPENDIX C sets out the noise management schedule. 5.2 Noise prediction methodology Modelling and assessment of airborne noise impacts from activities associated with the construction works were determined by modelling the noise sources, receiver locations, topographical features, and possible noise mitigation measures using a Cadna-A computer noise model developed for this project. The model calculates the contribution of each noise source at identified sensitive receiver locations and allows for the prediction of the total noise from a site for the various stages of the construction works. The noise prediction models consider: Location of noise sources and sensitive receiver locations. Height of sources and receivers referenced to one metre digital ground contours for the site area and surrounding area. Sound Power Levels (L w) of plant and equipment likely to be used during the various construction activities (see Table C1 in APPENDIX C). Table C1 also identifies the plant and equipment that will be operating during each assessment period. Separation distances between sources and receivers. Ground type between sources and receivers. Attenuation from barriers (natural and purpose built). For long linear works such as services identification and utilities relocations, the works lengths have been broken into sections, with separate sections of the works modelled, and the corresponding mitigation and measurement given based upon these individual works areas. Key details regarding the construction site layout, likely plant and equipment (including truck movements), and hours of operation were informed by the Design and Construction Teams. This 14

20 information is presented in APPENDIX C and formed the basis for all modelling assumptions used in this assessment. 5.3 Predicted noise levels Construction Noise emissions were determined by modelling the noise sources, receiver locations, and operating activities, based on the information presented in APPENDIX C. The location of each assessed works area is shown in Figure B2 (APPENDIX B). Predicted L Aeq noise levels from the sites are presented in APPENDIX D for all receivers in each NCA. The predictions are representative of noise levels during the works. The assessment includes the activities in Table 5.1. Table 5.1: Assessed construction works Activity Aspect Assessment Reference Works Areas Applicable to each activity Site establishment works Installation of laybacks and driveways LD A1, A2 Service identification works Potholing SIR A3 to A5 Utilities relocation Services relocations & new supplies SIR A3 to A5 Vegetation clearing Vegetation clearing VC A4 Plant delivery Deliveries of oversized plant into site DL A1 Crane lifting Hoisting steel structures or amenities blocks CW A1, A2 Note: the timing of each activity is described in Table C1 of Appendix C. Table 5.2 below summarises the predicted impacts with (shown with -H ) and without (shown with -L ) the high noise impact equipment for each construction stage in terms of compliance with the NML for commercial receivers. The colours in the table indicate whether receivers comply with the NML and, where exceedance of the NML occurs, the perceived impact of the exceedance. Not all assessed receiver types were assessed against the NML for commercial receivers. Detailed predictions for each receiver are in Appendix D. The impacts presented are as follows for OOHW Evening, Shoulder, Night and Weekend day: Complies with NML < 5dB(A) above NML - construction noise noticeable 5 to 15dB(A) above NML - construction noise clearly audible > 15 to 25dB(A) above NML - construction noise moderately intrusive >25dB(A) above NML - construction noise highly intrusive 15

21 Table 5.2: Summary of construction noise impacts Site establishment works NCA Level of compliance with NML LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N OSR Level of compliance with NML NCA SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-L-A1 CW-L-A1 CW-L-A2 D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N D/(O) E S N OSR Notes D(O): out of standard daytime hours between 1pm and 10pm Saturday and 8am to 10pm Sunday and public holidays E: evening period between 6 pm and 10 pm Monday to Sunday S: evening/night shoulder period between 10 pm to 12 am Monday to Sunday N: the remaining night period (i.e. between 12 am and 7 am Monday to Friday and 12 am to 8 am Saturday, Sunday and public holidays H: high impact activities (not after midnight) L: low impact activities 16 LOCAL AREA & UTILITY WORKS - BLIGH STREET

22 Exceedances of NMLs have been predicted at noise sensitive receivers around the works locations, and so the specific mitigation measures outlined in Table C2 (APPENDIX C) are to be incorporated into the construction work plan to assist in reducing noise impacts during the works period, where practicable. However, as the proposed works are short in duration, vary in location and include partial or complete road closure, the options for provision of mitigation are limited, and so impacts need to be managed. Due to the quality of the Radisson Blu façade, the risk of sleep disturbance to hotel guests is negligible. All feasible and reasonable mitigation measures have been applied to reduce noise impacts, as outlined in Section 5.4. For more detailed predictions see APPENDIX D. Measures for managing the noise impacts are provided in Section 5.4. For more detailed additional noise measures, refer to Appendix E Other sensitive receivers (Condition E34) APPENDIX B identifies other sensitive receivers in accordance with Condition E34. Presented in Table 5.3 are the E34 receivers that are predicted to be impacted by noise levels above the NML for each receiver type. In accordance with E34, these receivers are to be consulted as part of the management of the works so that activities are not undertaken within sensitive periods for each receiver, or other suitable arrangements are agreed to. Childcare receivers are unlikely to be operating during the OOHW periods proposed for the LAUW works (6-10 pm until 5-7 am). This needs to be confirmed for those receivers before works start. Bentley Restaurant and Bar (27 O'Connell Street) operates from 6 pm in the evenings and the Radisson Blu conference room can operate up to about 10 pm, so both may be affected by noise from the proposed works. Table D2 (APPENDIX D) compares predicted noise levels during works to the equivalent external management level for each floor of Pitt Street (Radisson Blu Hotel and Bentley Restaurant and Bar). Management levels are based on the most noise-sensitive activity and worst-performing façade (from inspection) on each floor of the building. Table E2 (APPENDIX E) shows the additional mitigation measures to be implemented for each floor of Pitt Street (Radisson Blu Hotel and Bentley Restaurant and Bar). When predicted noise levels are compared to equivalent external noise management levels for each floor, the greatest level of additional mitigation that would be offered to receivers in the hotel building would be MM2 (notification and validation of predicted levels). 17

23 The highest predicted noise levels at Radisson Blu are on the third floor. Predicted levels reduce slightly at lower floors (shielded by temporary barriers) and higher floors (further from sources). Work area A1 is opposite the hotel s reception area. While façade performance is good and an airlock is provided, both doors in the airlock can open temporarily, allowing higher noise levels inside the reception area. Impacts on hotel reception should be managed by informing the hotel of proposed works, scheduling works to less busy periods and asking them to schedule deliveries and inform guests of the works to minimise disruption. Table 5.3: E34 affected receiver locations Other sensitive receivers (Condition E34) Consultation required Commercial PITT STREET / 27 O CONNELL STREET (Bentley Restaurant + Bar) Hotel/Motel/Hostel PITT STREET / 27 O CONNELL STREET (Radisson Blu Sydney) Childcare Level 1, O CONNELL STREET (Mary s Kindy) 5.4 Noise mitigation and management Other noise control measures The following standard noise control measures, in addition to those outlined in Section 5.1, are recommended to reduce potential noise impacts: Table 5.4: Site noise control measures Control type Control measure Typical use At-Source Control Measures Noise control kits Limit equipment in use Timing of equipment in use Limit activity duration Plant that is brought to site for regular use should meet the sound power limits identified in Table C1. Where plant exceeds limits then the plant may require installation of noise control kits in order to comply with the noise limits set in Table C1. Such noise control kits comprise: high performance residential-grade exhaust mufflers, additional engine cowling / enclosure lined inside with sound absorbent industrial-grade foam, and air intake and discharge silencers / louvres. The requirement of fitting noise control kits onto the identified plant, shall be confirmed once each plant is tested prior to its regular use on site. Only the equipment necessary during each stage of the OOHW will be used. Where practicable, activities and plant will be limited as outlined in Table C1 and Table C2 (APPENDIX C). Any equipment not in use for extended periods shall be switched off. For example, heavy vehicles should switch engines off when not in use. 18

24 Control type Control measure Typical use Noise Management Measures Use and siting of plant Equipment selection Non-tonal reversing alarms Site inductions & Toolbox Talks Community consultation Behavioural practices Avoid/ limit simultaneous operation of noisy plant and equipment within discernible range of a sensitive receiver. Direct noise-emitting plant away from sensitive receivers where practicable. Locate fixed location plant items as far from sensitive receivers as practicable. Use quieter and less noise/ vibration emitting construction methods where feasible and reasonable. Alternative reverse alarms, such as quackers will be installed on all plant and equipment, where practicable. All employees, contractors and subcontractors are to receive a Project induction. The environmental component may be covered in toolboxes and should include: location of nearest sensitive receivers relevant project specific and standard noise and vibration mitigation measures; permissible hours of work; OOHW Procedure and Form construction employee parking areas. Inform community of construction activity and potential impacts. No swearing or unnecessary shouting or loud stereos/radios on site. No dropping of materials from height, throwing of metal items and slamming of doors. Noise monitoring Noise monitoring is to be carried out as detailed in Section Additional noise mitigation measures Table 5.5 below should be used to advise the appropriate additional mitigation during construction, as outlined in Section 8.2 of the CNVMP. These measures are consistent with the approach outlined in the SMCSNVS [7]. 19

25 Table 5.5: Additional airborne noise mitigation measures LB = Letter box drops V = Verification monitoring SN = Specific notifications IB = individual briefing RO = Project specific respite offer AA = Alternative accommodation APPENDIX E presents a summary of the additional noise mitigation measures applicable for construction activities where, after application of all reasonable and feasible mitigation options, construction noise levels still exceed the NMLs. The approach to additional noise mitigation measures in this assessment is more conservative than the approach outlined in Section and required by Conditions E41 and E42. Additional noise mitigation measures, determined in accordance with the SMCSNVS, will be offered to all affected residential receivers whether internal noise levels are predicted to be above or below the L Aeq(15minute) 45 db(a) threshold between 8pm and 7am. Prior to the commencement of LAU OOHWs, receivers around the site, identified in APPENDIX E, will be notified to advise that noise from the works may at times be audible. All potentially impacted receivers will be kept informed of the nature of works to be carried out, the expected noise levels and duration, as well as be given appropriate enquiries and complaints contact details (see Section 5.4.4) Attended noise monitoring Attended noise monitoring is to be undertaken to verify that noise levels resulting from construction works are in accordance with the levels predicted in this CNVIS, subject to obtaining the property owner/occupier s consent to access the property (where required). Attended noise monitoring will be undertaken during works at one of the representative residential receivers identified in the table below in the NCAs most impacted by the works (i.e. a minimum of one location for each NCA). Nominated attended measurement locations have been selected with the best opportunity to validate the predicted noise levels. 20

26 Table 5.6: Nominated verification monitoring locations Applicable Works Areas NCA Nominated receiver address Monitoring location A1 MP_ PITT STREET Outside hotel reception A2, A3 MP_ HUNTER STREET Bligh St footpath near The Wolf Wine Bar A4, A5 MP_03 66 HUNTER STREET Outside Rockpool Bar + Grill APPENDIX E identifies the activities where monitoring should be carried out for each NCA. Noise monitoring should follow the procedures outlined in Appendix D of the CNVMP. Note that monitoring may be undertaken from the property boundary to limit inconvenience to property owners Complaints handling Noise complaints received and responded to will be managed in accordance with the CNVMP and TSE Community Communication Strategy (SMCSWTSE-JCG-TPW-SH-PLN ). Transport for NSW operate a 24-hour construction complaints line ( ). Enquiries/ complaints may also be received through the Sydney Metro project (sydneymetro@transport.nsw.gov.au). 21

27 6 Construction vibration impacts 6.1 Minimum buffer distances for vibration intensive plant From the plant and equipment listed in APPENDIX C, the dominant vibration generating plant and equipment include: Excavator with rock hammer (up to 20 tonnes); Excavator with auger; Jackhammer. Potential vibration generated to receivers is dependent on separation distances, the intervening soil and rock strata, dominant frequencies of vibration, and the receiver structure. For excavation with rockbreakers, vibration levels are also dependent on the strength of the rock or other materials (e.g. excavation in hard rock will cause higher vibration levels compared with breaking the surface of pathways or road surfaces). The recommended minimum working distances for vibration intensive plant are presented in Table 6.1 and Table 6.2. These distances are conservatively based on excavation of hard rock. Site specific buffer distances for vibration significant plant items must be measured on site where plant and equipment is likely to operate close to or within the minimum working distances for cosmetic damage (Table 6.1). Unlike noise, vibration cannot be readily predicted. There are many variables from site to site, for example soil type and conditions, sub surface rock, building types and foundations, and actual plant on site. The data relied upon in this assessment (tabulated above) is taken from a database of vibration levels measured at various sites or obtained from other sources (e.g. BS5228-2:2009). They are not specific to this project as final vibration levels are dependent on many factors including the actual plant used, its operation and the intervening geology between the activity and the receiver. Table 6.1: Minimum working distances (m) for cosmetic damage (continuous vibration). Minimum working distance (m) Plant item Reinforced or framed structures (e.g. commercial buildings) 1 Unreinforced or light framed structures (e.g. residential buildings) 1 Sensitive structures (e.g. heritage structures) 2 Excavator (20T) with hammer Excavator with auger Jackhammer Note 1: Initial screening test criteria reduced by 50% due to potential dynamic magnification in accordance with BS7385. Note 2: In accordance with Section of CNVMP, a site inspection should determine whether a heritage structure is structurally unsound. Note 3: Minimum working distances are in 5m increments only to account for the intrinsic uncertainty of this screening method. Jackhammers are likely to have minimum working distances smaller than 5 m (e.g. 1m in accordance with TfNSW CNS). 22

28 Table 6.2: Minimum working distances (m) for human annoyance (continuous vibration). Minimum working distances, m Plant item Critical areas 1,4 Residences Hotel sleeping areas Offices 3,4 Workshops 4 Day 2 Night 2 Excavator (20T) with hammer Excavator with auger Jackhammer Avoid contact Notes 1: Examples include hospital operating theatres and precision laboratories where sensitive operations are occurring. 2: Daytime is 7 am to 10 pm; Night-time is 10 pm to 7am. 3: Examples include offices, schools, educational institutions and place of worship. 4: Applies when in use. 6.2 Vibration assessment Structural damage Approval Condition E29 requires owners of properties at risk of exceeding the screening criteria for cosmetic damage to be notified before the commencement of vibration-generating works. A project-wide register of properties potentially impacted by construction activities is maintained by the project team. Vibration monitoring is recommended at potentially impacted locations to verify that vibration levels comply the structural damage screening criteria, where plant needs to operate within the minimum working distance identified in Table 6.1. If monitoring identifies that vibration is likely to exceed the cosmetic damage screening criteria, a different construction method with lower source vibration levels will be considered Human annoyance The numbers of buildings where there is a probability of adverse comment to or disturbance from vibration are shown in Table

29 Table 6.3: Number of buildings within buffer distances for human annoyance. Plant item Work Zone Critical areas 1,4 Excavator (18T) with hammer / excavator with auger Residences Hotel sleeping areas Offices 3,4 Workshops 4 Day 2 Night 2 A A A A A Notes: 1: Examples include hospital operating theatres and precision laboratories where sensitive operations are occurring. 2: Daytime is 7 am to 10 pm; Night-time is 10 pm to 7am. 3: Examples include offices, schools, educational institutions and place of worship. 4: Applicable when in use. As can be noted from the table above, several properties may be exposed to vibration causing adverse comment, although due to the limited time the above plant will be operating close to these properties, the risk of annoyance is low. Additionally, when the excavator with hammer is used to break up road surfaces and is not working directly in rock or directly adjacent to building structures, it is unlikely that the vibrations will transfer efficiently into nearby building structures. Due to the above, it is recommended that attended vibration measurement should be carried out in the event of complaint from the nearest receiver to confirm that vibration is within the acceptable range for human annoyance (see Section 6.3.3). If vibration intensive equipment and plant are measured to exceed vibration objectives for human annoyance at these locations, vibration control and management measures should be provided to reduce vibration impact (see Section 6.3.1). After applying all feasible and reasonable vibration mitigation measures, if vibration monitoring still identifies that measured vibration levels exceed the relevant vibration criteria for human annoyance, appropriate additional mitigation measures should be considered (see Section 6.3.2). 6.3 Vibration mitigation measures Vibration control and management measures In addition to the vibration control measures presented in the CNVMP, the following vibration management measures are provided to minimise vibration impact from construction activities to the nearest affected receivers and to meet the relevant human comfort vibration and structural damage limits identified in Section

30 Table 6.4: Site vibration control measures. Control type Control measure Typical use Construction Planning Complaints Management Building condition surveys Community consultation Equipment selection/ construction method Plan work activities to minimise vibration. Construction Complaints Management System Undertake building dilapidation surveys on all buildings located within the buffer zones established for cosmetic damage prior to commencement of activities with the potential to cause property damage (see Section 6.1). Implement community consultation measures inform community of construction activity & potential impacts Use less vibration emitting construction methods where feasible & reasonable, for example vibratory rollers can, where practicable, be operated with the vibratory mode switched off to reduce vibration impact. Plan traffic flow, parking & loading/unloading areas to maximise distances between truck routes and sensitive receivers. Complaints will be managed in accordance with the Construction Complaints Management System (see Section 6.3.4). Each complaint shall be investigated and where vibration levels are established as exceeding the set limits, appropriate amelioration measures shall be put in place to mitigate future occurrences. Management measures may include modification of construction methods such as using smaller equipment and establishment of safe buffer zones as mentioned above Additional vibration mitigation measures After applying all feasible and reasonable mitigation measures identified in Table 6.4, if vibration monitoring at representative locations still exceeds relevant vibration objectives for human annoyance, the appropriate additional vibration mitigations measures, as outlined in Section 8.2 of the CNVMP. Table 6.5: Additional vibration mitigation measures LB = Letter box drops V = Verification monitoring SN = Specific notifications IB = individual briefing RO = Project specific respite offer AA = Alternative accommodation 25

31 6.3.3 Vibration monitoring Attended vibration monitoring is to be undertaken to determine and verify site specific minimum working distances for cosmetic damage and human annoyance. Attended vibration monitoring will be undertaken during works at the locations identified in Table 6.6 whenever vibration significant plant items are operating close to or within the determined minimum working distances. Table 6.6: Attended vibration monitoring - nominated representative locations. Plant Work areas Address Excavator (18T) with hammer / Excavator with auger / smooth drum roller Vibration objectives to check Sensitive equipment A PITT STREET SYDNEY A O'CONNELL STREET SYDNEY A HUNTER STREET SYDNEY A O CONNELL STREET SYDNEY A2 37 BLIGH STREET SYDNEY Human annoyance 1 A2 to A HUNTER STREET SYDNEY A2 29 BLIGH STREET SYDNEY A2 to A5 66 HUNTER STREET SYDNEY A4 to A5 1-7 CASTLEREAGH STREET SYDNEY A4 to A HUNTER STREET SYDNEY Notes: 1. Monitoring required if a vibration complaint is received Complaints handling Vibration complaints received and responded to will be managed in accordance with the CNVMP and TSE Community Communication Strategy (SMCSWTSE-JCG-TPW-SH-PLN ). Transport for NSW operate a 24-hour construction complaints line ( ). Enquiries/ complaints may also be received through the Sydney Metro project (sydneymetro@transport.nsw.gov.au). 26

32 7 Ground-borne noise assessment Due to the nature of the LAUW activities, which are surface road works in proximity to receivers, the airborne-noise is expected to dominate the noise impacts on nearby noise sensitive receivers. The ground-borne noise from LAUW activities are expected to be insignificant compared with the airborne-noise impacts. Additionally, as the use of an excavator with hammer is to break up road surface, and is not working directly into rock or directly adjacent to a receiver building structure, it is unlikely that the vibrations will transfer into nearby building structures resulting in significant ground-borne noise levels. As such, the risk of annoyance due to ground-borne noise is considered low and has not been addressed further in this CNVIS. 27

33 8 Traffic noise assessment Due to the small number of deliveries and heavy vehicle movements associated with the Local Area and Utility works, the increase in road traffic noise levels is predicted to be less than 2 db(a) and compliant with the road traffic noise criteria established for the project. Construction traffic associated with the activities assessed in this CNVIS are predicted to have minimal impact on sensitive receivers on the main roads used to access the site. Notwithstanding this, the Heavy Vehicle Code of Conduct includes several measures, including limiting of compression braking, minimisation of vehicle idling, which will ensure that noise impacts of heavy vehicle traffic on surrounding streets are minimised. 28

34 9 Cumulative impacts Currently no other Sydney Metro construction works are proposed to take place simultaneously with the LAUW. If other Sydney Metro construction works are scheduled to occur simultaneously with the works assessed in this CNVIS, cumulative noise and vibration impacts will be reviewed at that time. Any necessary changes to the recommended mitigation & management measures will then be identified and adopted to sufficiently deal with the cumulative noise or vibration impacts. 29

35 10 Conclusion Construction works associated with the local area and utility works for the Bligh Street site have been identified and described in this report. Potentially affected noise sensitive receivers and relevant construction noise objectives have been identified and discussed to allow the assessment of potential construction noise impacts. Expected construction noise levels have been predicted and presented in Section 5.3 and APPENDIX D. The expected duration of construction activities is outlined in Table C1 of APPENDIX C. The highest noise impacts are predicted to occur when excavators with hammer and road saws are used close to sensitive receivers. Subject to Road Occupancy Licence (ROL) approvals, these activities will be completed prior to midnight (where possible) to minimise impacts. The potential noise and vibration impacts associated with remaining activities are significantly reduced. Noise mitigation and management measures have been presented in Section 5.4 to aid in providing additional noise reduction benefits where exceedance of the noise objectives occurs. Vibration impacts and management measures have been presented in Section 6 to aid in minimising any potential vibration impacts. Minimal construction vehicles are proposed as part of the works, and so construction traffic noise on the local road network associated with the LAUW will have minimal impact on receivers in proximity to public roads. 30

36 References [1] Environment Protection Licence 20971, Anniversary Date: 28 September for SYDNEY METRO CITY & SOUTHWEST TUNNELS AND EXCAVATION WORKS [2] Sydney Metro City & Southwest TSE Works Construction Noise and Vibration Management Plan (SMCSTSE-JCG-TPW-EN-PLN ) [3] SLR Consulting Australia Pty Ltd 2016 Sydney Metro Chatswood to Sydenham - Technical Paper 2: Noise and Vibration Report Number R1 28 April 2016 [4] Department of Environment and Climate Change 2009 NSW Interim Construction Noise Guideline (ICNG), [5] Department of Environment Conservation NSW 2006 Assessing Vibration; a technical guideline [6] British Standard 7385 Part , Evaluation and measurement for vibration in buildings. Guide to damage levels from groundborne vibration [7] British Standard BS , Evaluation of human exposure to vibration in buildings (1-80Hz) [8] Transport for NSW Sydney Metro City & Southwest Construction Noise Strategy (ref: R3) 08 August 2016 [9] Transport for NSW Construction Noise Strategy (ref: 7TP-ST-157/2.0) April

37 APPENDIX A Glossary of terminology The following is a brief description of the technical terms used to describe noise to assist in understanding the technical issues presented. Adverse weather Ambient noise Assessment period Weather effects that enhance noise (that is, wind and temperature inversions) that occur at a site for a significant period of time (that is, wind occurring more than 30% of the time in any assessment period in any season and/or temperature inversions occurring more than 30% of the nights in winter). The all-encompassing noise associated within a given environment at a given time, usually composed of sound from all sources near and far. The period in a day over which assessments are made. Assessment point Background noise Decibel [db] db(a) db(c) Frequency Impulsive noise Intermittent noise LMax LMin A point at which noise measurements are taken or estimated. A point at which noise measurements are taken or estimated. Background noise is the term used to describe the underlying level of noise present in the ambient noise, measured in the absence of the noise under investigation, when extraneous noise is removed. It is described as the average of the minimum noise levels measured on a sound level meter and is measured statistically as the A-weighted noise level exceeded for ninety percent of a sample period. This is represented as the L90 noise level (see below). The units that sound is measured in. The following are examples of the decibel readings of every day sounds: 0dB The faintest sound we can hear 30dB A quiet library or in a quiet location in the country 45dB Typical office space. Ambience in the city at night 60dB CBD mall at lunch time 70dB The sound of a car passing on the street 80dB Loud music played at home 90dB The sound of a truck passing on the street 100dB The sound of a rock band 115dB Limit of sound permitted in industry 120dB Deafening A-weighted decibels. The A- weighting noise filter simulates the response of the human ear at relatively low levels, where the ear is not as effective in hearing low frequency sounds as it is in hearing high frequency sounds. That is, low frequency sounds of the same db level are not heard as loud as high frequency sounds. The sound level meter replicates the human response of the ear by using an electronic filter which is called the A filter. A sound level measured with this filter switched on is denoted as db(a). Practically all noise is measured using the A filter. C-weighted decibels. The C-weighting noise filter simulates the response of the human ear at relatively high levels, where the human ear is nearly equally effective at hearing from mid-low frequency (63Hz) to mid-high frequency (4kHz), but is less effective outside these frequencies. Frequency is synonymous to pitch. Sounds have a pitch which is peculiar to the nature of the sound generator. For example, the sound of a tiny bell has a high pitch and the sound of a bass drum has a low pitch. Frequency or pitch can be measured on a scale in units of Hertz or Hz. Having a high peak of short duration or a sequence of such peaks. A sequence of impulses in rapid succession is termed repetitive impulsive noise. The level suddenly drops to that of the background noise several times during the period of observation. The time during which the noise remains at levels different from that of the ambient is one second or more. The maximum sound pressure level measured over a given period. The minimum sound pressure level measured over a given period. 32

38 L1 L10 L90 Leq Reflection The sound pressure level that is exceeded for 1% of the time for which the given sound is measured. The sound pressure level that is exceeded for 10% of the time for which the given sound is measured. The level of noise exceeded for 90% of the time. The bottom 10% of the sample is the L90 noise level expressed in units of db(a). The equivalent noise level is the summation of noise events and integrated over a selected period of time. Sound wave changed in direction of propagation due to a solid object obscuring its path. SEL Sound Exposure Level (SEL) is the constant sound level which, if maintained for a period of 1 second would have the same acoustic energy as the measured noise event. SEL noise measurements are useful as they can be converted to obtain Leq sound levels over any period of time and can be used for predicting noise at various locations. Sound Sound absorption Sound level meter Sound pressure level Sound power level Tonal noise A fluctuation of air pressure which is propagated as a wave through air. The ability of a material to absorb sound energy through its conversion into thermal energy. An instrument consisting of a microphone, amplifier and indicating device, having a declared performance and designed to measure sound pressure levels. The level of noise, usually expressed in decibels, as measured by a standard sound level meter with a microphone. Ten times the logarithm to the base 10 of the ratio of the sound power of the source to the reference sound power. Containing a prominent frequency and characterised by a definite pitch. 33

39 APPENDIX B Nearest sensitive receivers and noise management levels 34

40

41

42 RENZO TONIN & ASSOCIATES 11/10/2017 Table B1: Noise sensitive receivers and construction noise management levels Reference NCA Receiver Type Airborne Noise Management Levels (NMLs) L Aeq(15 min) Day (S) Day (O) Evening Night MARTIN PLACE - BLIGH STREET LAU WORKS Comments OSR Commercial (restaurants and bars) BLIGH STREET SYDNEY The Wolf Wine Bar PITT STREET SYDNEY / 27 O'CONNELL STREET SYDNEY Bentley Restaurant and Bar 66 HUNTER STREET SYDNEY Rockpool Bar and Grill OSR Hotel/Motel/Hostel PITT STREET SYDNEY / 27 O'CONNELL STREET SYDNEY Radisson Blu Hotel OSR Childcare centre Level 1, O'CONNELL STREET SYDNEY Mary's Kindy 9 CASTLEREAGH STREET SYDNEY Castlereagh Street Early Learning Centre Other sensitive receivers (NMLs only apply when the premises is in use) OSR Childcare centre ICNG Daytime NML of 55dB(A) is external equivalent of 45dB(A) internal goal for classrooms with windows open. OSR Hotel/ motel AS NML of 60dB(A) is external equivalent of 40dB(A) internal goal for hotels on busy roads based on AS2107 assuming windows closed OSR Commercial receivers/ offices ICNG TH S03 BL LAUW AppB&C (r0).xlsx 1 SYDNEY METRO CITY SOUTHWEST - TSE WORKS B1 Receivers & Noise Goals

43 APPENDIX C Construction timetable/ activities/ management 38

44 RENZO TONIN & ASSOCIATES 8/03/2018 Table C1: Construction timetable/ activities/ equipment Activity/ Work Area Site Establishment Plant/ Equipment Net Power kw Bligh Street local area and utility works Day (OOHW) Evening Shoulder Night Notes Sound Power Level (Lw re: 1pW) in Operating Timing of Activity (Approx 1pm -10 pmsat Weight kg 6pm - 10pm 10pm-12am 12apm - 7am No. weeks) L Aeq L A1 8am - 10 pm Sun Concrete saw 117kW - 1* 1* - 3 Only to occur on 2 nights, finish sawing by 12am 121 Generator 5 KVA Concrete vibrators * Power tools (drill, etc.) Power tools (circular saw etc.) Circular saw must not be used after midnight 115 Percussion drill (Hilti TE70) Will not be used every night. Finish by 12am Compactor 300kg DPU Concrete agi * 3 Will not be pouring concrete every night 108 Excavator with hammer 20T Minimal hammering required. Finish hammering by 12am Trailer mounted lighting tower - 4* 4* Light vehicles Turned off when not in use 88 Service Identification Potholing Daymakers (4 Aspects) - 1* 1* night(s) on O'Connell St Concrete Saw 22 hp - 1* 1* night(s) on Bligh St Vac Truck - 1* 1* Tipper Truck 2t Plate compactor Utilities relocation - Services relocations & new supplies; Vacuum Truck - 2* 2* * Roadheader HV Supply Road saw - 1* 1* m per shift night shifts. Excavator with hammer 13 t November 2017 to January 2018 Excavator with bucket 13 t * Tipper Truck 2t * Tipper Truck 8t * Jumping Jack Whacker Packer * Plate compactor Mobile crane 25t Franna Light vehicles Vegetation clearing Vegetation clearing Light Towers night 90 Oversized Plant Delivery & Unloading Aspect Installation of laybacks and driveways Bligh Street and Hunter Street Girder Delivery Truck mounted cherry picker 12t * 2 nights 105 Chainsaw - 2* 2* - 1 night 116 Electric chainsaws * 1 night 106 tipper Truck night 97 Utes night 98 Road sweeper night Road sweeper only operates at the end of the night shift 104 Semi-trailer low loader - 4 p.h.* 4 p.h.* 4 p.h.* 1-2 To be turned off when at designated unloading position 108 Excavator unloading 14-30T - 1* 1* 1* Crane lifting Crane lifting Crane T 1* 1* 1* 1* 3 nights/week, up to Lighting Towers 3* 3* 3* 3* nights/month; and 6 92 weekend days EWP 1* 1* 1* 1* 102 * Indicates equipment that have been modelled, which are assumed to operate simultaneously during a reasonable worst case period. Delivery truck 4 p.h.* 4 p.h.* 4 p.h.* 4 p.h.* To be turned off when not in use. 107 TH S03 BL LAUW AppB&C (r2) 1 SYDNEY METRO CITY SOUTHWEST - TSE WORKS CNVIS: LOCAL AREA UTILITY WORKS - BLIGH STREET

45 RENZO TONIN & ASSOCIATES 16/11/2017 Table C2: Construction Noise Management Schedule SYDNEY METRO TSC - Local Area & Utility Works - BL Mitigation/ Management Measure Comments 1 Temporary screens Temporary noise screens (e.g. FlexShield, Echo-barrier or similar) will be installed around the work areas where possible. The screen should be located on all sides of the work areas and as close as possible to the plant. This will reduce the noise from the construction activities by up to 10 db(a) when there is no direct line of sight between construction plant and receivers. 2 High noise impact works High noise activities such as saw cutting, chainsaws, excavator with hammer, and percussion drills are to be limited to before midnight, where feasible with consideration of the ROL. 3 Sleep Disturbance - Maximum noise level management 1) Maximum noise levels with potential to cause sleep disturbance may be caused by activities such as use of air brakes, banging of rails or hammers and general clangs and bangs on site. These activities will be managed by personnel of the need to respect the residential receivers surrounding the local area work sites as part of the toolbox talk for these works, stressing the lower night-time background noise levels in the works areas. 2) Minimise the use of air brakes when travelling to and from the site. 3) Identify and eliminate or manage the potential of loose items or plant/equipment that could generate metal-on-metal bangs during the night period. 4 Verification monitoring - Noise Verification monitoring must be conducted to validate predictions in the nominated positions against the project requirements, as outlined in Section Receiver notification/briefing - Noise 6 Verification monitoring - Vibration 7 Receiver notification/briefing - Vibration A large range of receivers may be impacted by the works. Some properties close to the work areas will be exposed to highly noise impacts during the OOHW period. All additional mitigation measures outlined in APPENDIX E should be applied. Plant and equipment have been identified to operate within the minimum buffer distances for both cosmetic damage and human annoyance. Verification monitoring must be conducted to validate predictions in the nominated positions against the project requirements, as outlined in Section Plant and equipment have been identified to operate within the minimum buffer distances for human annoyance. Vibration may be perceivable at times. Notifications should be sent to receivers included in Table 6.7, and additional mitigation measures where applicable following monitoring. TH S03 BL LAUW AppB&C (r1).xlsx 1 SYDNEY METRO CITY SOUTHWEST - TSE WORKS C2 Noise Management Schedule

46 APPENDIX D Detailed predicted noise levels The impacts presented in the following table are identified by colour coding of the text. For Standard Hours: XX Complies with NML XX < 10dB(A) above NML - construction noise clearly audible XX > 10dB(A) above NML - construction noise clearly moderately intrusive XX > 75dB(A) - highly noise affected For OOHW Evening, Shoulder and Night: XX Complies with NML XX < 5 db(a) above NML - construction noise noticeable XX 5 to 15 db(a) above NML - construction noise clearly audible XX > 15 to 25 db(a) above NML - construction noise moderately intrusive XX > 25 db(a) above NML - construction noise highly intrusive 40

47 RENZO TONIN & ASSOCIATES 7/03/2018 Table D1: Predicted construction noise levels Bligh Street local area and utility works Receiver Predicted noise levels, db(a) Predicted noise levels, db(a) Predicted noise levels, db(a) Predicted noise levels, db(a) Day (OOHW) Evening (OOHW) Shoulder (OOHW) Night (OOHW) NCA Address Receiver type NML CW-A1 CW-A2 NML LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 NML LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 NML LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 OSR 1 BLIGH STREET SYDNEY Commercial OSR 4-6 BLIGH STREET SYDNEY Commercial OSR 29 BLIGH STREET SYDNEY Commercial OSR 37 BLIGH STREET SYDNEY Commercial OSR 1-7 CASTLEREAGH STREET SYDNEY Commercial OSR 9 CASTLEREAGH STREET SYDNEY Childcare OSR 2 CHIFLEY SQUARE SYDNEY Commercial OSR 23 HUNTER STREET SYDNEY Commercial OSR HUNTER STREET SYDNEY Commercial OSR HUNTER STREET SYDNEY Commercial OSR HUNTER STREET SYDNEY Commercial OSR 66 HUNTER STREET SYDNEY Commercial OSR HUNTER STREET SYDNEY Commercial OSR 1-15 O'CONNELL STREET SYDNEY Commercial OSR 6-10 O'CONNELL STREET SYDNEY Commercial OSR O'CONNELL STREET SYDNEY Commercial OSR 16 O'CONNELL STREET SYDNEY Commercial OSR O'CONNELL STREET SYDNEY Commercial OSR O'CONNELL STREET SYDNEY Commercial OSR PITT STREET SYDNEY Hotel/Motel/Hostel OSR O'CONNELL STREET SYDNEY Childcare OSR PHILLIP STREET SYDNEY Hotel/Motel/Hostel OSR 68 PITT STREET SYDNEY Commercial OSR PITT STREET SYDNEY Commercial OSR 17 O'CONNELL STREET SYDNEY Commercial OSR 25 BLIGH STREET SYDNEY Commercial OSR 8-12 CHIFLEY SQUARE SYDNEY Commercial OSR 50 MARTIN PLACE SYDNEY Commercial OSR 41 BRIDGE STREET SYDNEY Commercial OSR 1 FARRER PLACE SYDNEY Commercial OSR 46C YOUNG STREET SYDNEY Commercial OSR BRIDGE STREET SYDNEY Commercial OSR PITT STREET SYDNEY Commercial TH S05 construction noise results - by building (r2).xlsm SYDNEY METRO CBD AND SOUTH WEST Bligh Street local area and utility works

48 RENZO TONIN & ASSOCIATES 7/03/2018 Table D1: Predicted construction noise levels Bligh Street local area and utility works Receiver Predicted noise levels, db(a) Predicted noise levels, db(a) Predicted noise levels, db(a) Predicted noise levels, db(a) Day (OOHW) Evening (OOHW) Shoulder (OOHW) Night (OOHW) NCA Address Floor Receiver type NML CW-A1 CW-A2 NML LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 NML LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 NML LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 OSR PITT STREET SYDNEY G Hotel/Motel/Hostel, Restaurant OSR PITT STREET SYDNEY 1 Meetting room OSR PITT STREET SYDNEY 1 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 2 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 3 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 4 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 5 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 6 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 7 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 8 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 9 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 10 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 11 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 12 Hotel/Motel/Hostel TH S05 construction noise results - by floor (r3).xlsm SYDNEY METRO CBD AND SOUTH WEST Bligh Street local area and utility works

49 APPENDIX E Additional noise mitigation The figure following identifies the additional mitigation measures to be applied at (airborne) construction noise affected receivers when, after applying all feasible and reasonable mitigation measures, noise levels still exceed the NMLs. The legend below identifies the notations in Tables E1 to E3. Where internal noise level thresholds apply, equivalent external noise level thresholds have been established in accordance with Section Identified receiver types are based upon the most noise sensitive receiver within a building (Table E1) or floor (Table E2). Only this receiver type has been assessed, assuming that meeting the requirements of the most noise sensitive receiver will also meet the requirements of all other receivers in the building. 43

50 RENZO TONIN & ASSOCIATES 7/03/2018 Table E1: Additional noise mitigation and receiver notifications Bligh Street local area and utility works Receiver Predicted noise levels, db(a) Day (OOHW) Evening (OOHW) Shoulder (OOHW) NCA Address Receiver type CW-A1 CW-A2 LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 LD-H-A1 LD-H-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 OSR 1 BLIGH STREET SYDNEY Commercial MM1 MM1 OSR 4-6 BLIGH STREET SYDNEY Commercial MM1 MM1 MM1 MM1 OSR 29 BLIGH STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR 37 BLIGH STREET SYDNEY Commercial MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM1 MM1 OSR 1-7 CASTLEREAGH STREET SYDNEY Commercial MM1 MM1 MM2 MM2 MM1 MM1 MM1 MM2 MM2 MM1 MM1 MM1 MM1 MM1 OSR 9 CASTLEREAGH STREET SYDNEY Childcare MM1 MM1 MM2 MM2 MM4 MM4 MM2 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM2 MM2 MM4 MM4 MM2 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM2 MM2 MM2 MM2 MM2 MM1 MM1 MM2 OSR 23 HUNTER STREET SYDNEY Commercial MM1 MM1 OSR HUNTER STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR HUNTER STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR HUNTER STREET SYDNEY Commercial MM1 MM2 MM2 MM2 MM2 MM1 MM1 MM1 MM1 MM1 MM2 MM2 MM2 MM2 MM1 MM1 MM1 MM1 MM1 MM1 MM2 MM2 MM1 MM1 MM1 MM1 MM2 OSR 66 HUNTER STREET SYDNEY Commercial MM1 MM1 MM2 MM2 MM4 MM2 MM2 MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM2 MM4 MM2 MM2 MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM4 MM2 MM2 MM2 OSR HUNTER STREET SYDNEY Commercial MM1 MM1 MM2 MM1 MM1 MM2 MM1 OSR 1-15 O'CONNELL STREET SYDNEY Commercial MM1 MM1 OSR 6-10 O'CONNELL STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 OSR O'CONNELL STREET SYDNEY Commercial MM1 MM1 OSR 16 O'CONNELL STREET SYDNEY Commercial MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM1 MM1 MM2 OSR O'CONNELL STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR O'CONNELL STREET SYDNEY Commercial MM1 MM2 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM2 OSR PITT STREET SYDNEY Hotel/Motel/Hostel MM2 MM4 MM1 MM1 MM1 MM1 MM2 MM2 MM2 MM4 MM1 MM1 MM1 MM1 MM2 MM2 MM2 MM4 MM1 MM1 MM4 MM4 MM1 OSR O'CONNELL STREET SYDNEY Childcare MM4 MM1 MM4 MM4 MM4 MM2 MM2 MM2 MM4 MM1 MM2 MM1 MM1 MM4 MM4 MM1 MM4 MM4 MM4 MM2 MM2 MM2 MM4 MM1 MM2 MM1 MM1 MM4 MM4 MM1 MM5 MM2 MM4 MM2 MM1 MM2 MM5 MM5 MM2 OSR PHILLIP STREET SYDNEY Hotel/Motel/Hostel MM2 MM1 MM1 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR 68 PITT STREET SYDNEY Commercial MM1 MM1 MM1 MM1 MM1 MM1 MM1 MM1 OSR PITT STREET SYDNEY Commercial MM1 MM1 OSR 17 O'CONNELL STREET SYDNEY Commercial MM1 MM1 OSR 8-12 CHIFLEY SQUARE SYDNEY Commercial MM1 MM1 MM1 MM1 TH S05 construction noise results - by building (r2).xlsm SYDNEY METRO CBD AND SOUTH WEST Bligh Street local area and utility works

51 RENZO TONIN & ASSOCIATES 7/03/2018 Table E1: Additional noise mitigation and receiver notifications Bligh Street local area and utility works Receiver Additional noise mitigation and receiver notifications Day (OOHW) Evening (OOHW) Shoulder (OOHW) Night (OOHW) CW-A1 CW-A2 LD-H-A1 LD-H-A2 LD-H-A1 LD-H-A2 LD-L-A1 LD-L-A2 NCA Address Floor Receiver type SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 SIR-H-A3 SIR-H-A4 SIR-H-A5 VC-H-A4 LD-L-A1 LD-L-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 SIR-L-A3 SIR-L-A4 SIR-L-A5 VC-L-A4 DL-A1 CW-A1 CW-A2 OSR PITT STREET SYDNEY G Hotel/Motel/Hostel, Restaurant MM2 MM2 MM1 MM1 MM1 OSR PITT STREET SYDNEY 1 Meetting room MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM2 MM2 OSR PITT STREET SYDNEY 1 Hotel/Motel/Hostel MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM1 MM1 MM1 MM1 MM2 MM2 MM2 OSR PITT STREET SYDNEY 2 Hotel/Motel/Hostel OSR PITT STREET SYDNEY 3 Hotel/Motel/Hostel MM1 MM1 OSR PITT STREET SYDNEY 4 Hotel/Motel/Hostel MM1 MM1 OSR PITT STREET SYDNEY 5 Hotel/Motel/Hostel MM1 MM1 OSR PITT STREET SYDNEY 6 Hotel/Motel/Hostel TH S05 construction noise results - by floor (r3).xlsm SYDNEY METRO CBD AND SOUTH WEST Bligh Street local area and utility works

52 ENDORSEMENT CITY & SOUTHWEST ACOUSTIC ADVISOR Review of Prepared by: Construction Noise and Vibration Impact Statement: Local Area & Utility Works Bligh Street Dave Anderson Document reference: SYDNEY METRO CITY & SOUTHWEST-TSE WORKS Construction Noise and Vibration Impact Statement: Local Area & Utility Works Bligh Street Date of issue: 21 December 2017 TH F01 BL CNVIS LAUW (r2) Dated 16 November 2017 As approved Acoustic Advisor for the Sydney Metro City & Southwest project, I have reviewed the Construction Noise and Vibration Impact Statement (CNVIS) for the Local Area & Utility Works Bligh Street, as required under A27 (d) of the project approval conditions and I endorse revision 2 of the impact statement. Dave Anderson, City & Southwest Acoustic Advisor Acoustic Studio: TSE BS LAUW CNVIS Rev2 AA endorsement.docx - 1 -

53 HBI Healthy Buildings International Pty Ltd A.C.N A.B.N Suite 2.06, Level Solent Circuit Baulkham Hills NSW 2153 Tel: 61 (02) hbi@hbi.com.au Web: Mr Stuart Hodgson 22 December 2017 Director Program Sustainability Environment & Planning Sydney Metro Transport for NSW PO Box K659 HAYMARKET NSW 1240 Ref: TSE LAUW BS CNVIS Dear Stuart RE: Endorsement of TSE Construction Noise and Vibration Impact Statement: Local Area & Utility Works Bligh Street Sydney Metro City & Southwest Thank you for providing the following document for Environmental Representative (ER) review. Construction Noise and Vibration Impact Statement Local Area & Utility Works Bligh Street (Revision 2 dated 16 November 2017). Acoustic Advisor (AA) Endorsement (of the above document) dated 21 December 2017 As an approved ER for the Sydney Metro City & Southwest project, I have reviewed the above document. The review did not comprise a technical review, as the ER has relied upon the AA s review of technical aspects of the document. The ER review notes the CNVIS is developed to address Condition E33 of the Sydney Metro Infrastructure Approval (CSSI 15_7400) and provides for various activities that may be conducted in relation to Local Area and Utility Works at the Bligh Street site. In the event that any of the proposed works are required to be undertaken prior to approval of the CEMP and Construction, the project must demonstrate and ensure that these works are minimal environmental impact works and that the works satisfy the definition of Construction as per CSSI 15_7400. Subject to the above, on the basis of the endorsement of the document by the AA, the CNVIS is endorsed as appropriate for implementation in accordance with Condition A24(d). Yours sincerely Michael Woolley Environmental Representative Sydney Metro City and South West Leaders in Environmental Consulting 1