C29 22 24 Normanby Road SSCNMP

C29 22 –24 Normanby Road SSCNMP

C29.1 Introduction

This Site-SpecificConstruction Noise Management Plan (SSCNMP) is for the residential building located at 22/24 Normanby Road. A SSCNMP is required because construction is predicted to exceed the Project Noise Standards in CRL designation condition 31. This SSCNMP has been prepared in accordance with CRL designation condition 37 and is Appendix C29 of the Mt Eden Main Works Construction Noise and Vibration Delivery Work Plan (CNV DWP). It is a supplementary document that builds on the Project CNV DWP, and therefore directly references relevant sections of the DWP to avoid repetition. The objective of this SSCNMP is to detail the best practicable option(s) (BPO) to avoid, remedy or mitigate the identified adverse effects from noise exceedances at 22/24 Normanby Road. This SSCNMP has been prepared for the Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Project. It builds on the SSCNMP previously prepared and implemented for the Normanby Rd Early Works.

C29.2 Engagement

Normanby Rd Early Works (for information)

In the absence of contact details, Link Alliance representative Sonya Leahy spoke to Sharron O’Sullivan (Normanby Mews Body Corporate Manger) on 17 October 2019. Unfortunately, Ms O’Sullivan was not interested in discussing the project, it’s effects or how to effectively engage with the Normanby Mews owners and occupiers. The apartments at 24 Normanby Road have linear weatherboard façades with operable glazing and a steel pitched roof. The estimated sound level difference across the façade with the windows and doors closed is 30 decibels.

Figure B.5 in Appendix B of the Normanby Rd Early Works CNV DWP shows that the south façade is predicted to be exposed to noise levels between 75 –80 dB L Aeq during the closest rock breaking activities, exceeding the 75 dB L Aeq noise limit. Activity specific mitigation and management measures are included in Section 7 of the CNV DWP and not repeated here (e.g. Section 9.7 concrete and rock breaking). The predicted daytime construction noise effects from Table 12-1 in Section 12.1 are predicted to be typically acceptable, but with the potential for short term disturbance for the utilities works locally in Normanby Road. In addition, night-time exceedances are predicted while back filling a stormwater trench in the driveway of 32 Normanby Road, programmed over a single night (section 6.1 of the Enabling Works CNV DWP). The northern façade may be exposed to up to 69 dB L Aeq , 10 decibels above the night-time noise limit of 60 dB L Aeq . The exceedance only relates to the eastern extent of this trench, during the tie in on Normanby Road. Effective screening (Section 9.5) will further mitigate received noise levels. The predicted night-time construction noise effects from Table 12-2 in Section 12.1 are annoyance and potentially sleep disturbance for some noise sensitive receivers. Any exceedance would be brief and is considered to be acceptable with prior communication and where mitigated with the use of effective noise barriers (Section 9.5). Physical receiver mitigation, such as temporary relocation of affected receivers, alternative ventilation and façade sound insulation improvements, have been considered, but are not required as part of the BPO for the C5 enabling works due to the short duration of night works.

Page 87 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

Consultation engagement has not been successful to date. Prior communication of timeframes for works with the potential to exceed the relevant noise limits will be provided where practicable (Section 10).

Mt Eden Main Works

Link Alliance representatives XXX met with building representative XXX on XXX date. The matters discussed included:

An overview of the next project phases

General programme, rock removal, excavation, piling, and utilities relocation activities

General review of CNV DWP and this SSCNMP, communications triggers and monitoring CNV DWP Section 7 identifies summarise the potential scale of noise and/or vibration exceedances using the modelling outputs in insert hyperlink to the GIS maps here. The relevant stages are summarised below. Activity specific mitigation and management measures are included in Section 9 of the CNV DWP, and referenced in brackets, rather than repeated.

Retaining walls (refer piling in Section 9.8)

Excavation (refer concrete and rock breaking in Section 9.7)

Utilities and drainage (refer concrete cutting and breaking in Sections 9.6 and 9.7)

Normanby Rd (refer piling in Section 9.8)

Night Works (refer cranage night works in Section 9.2) The predicted construction noise effects from Table 12.1 in Section 12.1 are predicted to result in XXX noise effects. Physical receiver mitigation, such as temporary relocation of affected receivers, alternative ventilation and façade sound insulation improvements, have been considered, but are not required as part of the BPO for the Mt Eden Station Main Works.

XXX agreed that prior communication of timeframes for works with the potential to exceed the relevant noise limits was an acceptable means of managing effects. No further activity specific consultation is necessary over and above regular communication (Section 10).

C29.3 Review Process

If the property representatives request consultation in the future, this SSCNMP will be updated in accordance with CRL designation condition 37.5, with consideration given to the following:

The extent to which noise may exceed the Project Noise Standards

The timing and duration of any exceedance

The type of activity causing any exceedance

A summary of the communication and consultation with the receiver

The methods and measures to mitigate noise effects

A statement of why they reflect best practicable option

Page 88 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

Communications records are contained in the communication and consultation plan (CCP). This SSCNMP will be updated to summarise engagement and any agreed site-specific measures.

Page 89 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs