C21 32 Akiraho Street (Bear Park) SSCNMP

C21 32 Akiraho Street (Bear Park) SSCNMP

C21.1 Introduction

This Site Specific Construction Noise Management Plan (SSCNMP) is for the Bear Park childcare centre located at 32 Akiraho Street. A SSCNMP is not required for the Mt Eden enabling works because construction is predicted to comply with the noise standards in CRL designation condition 31. Nonetheless, this precautionary SSCNMP sets up the process to address specific conditions and ensure good effective communication with Bear Park in advance of any potential exceedances from future stages of works. This SSCNMP has been prepared in accordance with CRL designation condition 37 and is Appendix C21 of the Mt Eden Enabling Works Construction Noise and Vibration Delivery Work Plan (CNV DWP). It is a supplementary document that builds on the CNV DWP, and therefore directly references relevant sections of the CNV 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 32 Akiraho Street. This SSCNMP has been prepared for the Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Mt Eden Enabling Works. It builds on the SSCNMP previously prepared and implemented for the Mt Eden Enabling Works.

C21.2 Building Details

Mt Eden Enabling Works (for information)

Link Alliance representatives Sonya Leahy, Thibaut L'Hopital, Aidan Kirkby-McLeod, Simon Titter and Craig Fitzgerald met with Paloma Poliko (Centre Manager) on 14 October 2019. The matters discussed included:

An overview of the project General project programme, demolition and rock breaking/blasting activities

Overview of the CNV DWP and this SSCNMP, communications triggers and protocol Bear Park caters for nearly 100 families. The site buildings and outdoor play areas are screened from the NAL and site works by the new Station R apartments. Sleep times for junior children are between 12 noon and 2pm. Blasting times avoid sleep disturbance. Figure B.8 in Appendix B of the Mt Eden Enabling Works CNV DWP shows that the north façade is predicted to be exposed to noise levels between 60 –65 dB L Aeq during the closest

rock breaking activities, complying with the 65 dB L Aeq

noise limit in CRL designation condition 31.1. Activity specific mitigation and management measures are included in Section 9 of the CNV DWP and not repeated here (e.g. Section 9.7 concrete and rock breaking). The modern brick building has sealed glazing and a pitched fibre cement roof. The estimated sound level difference across the façade with the doors closed is 30 decibels. The predicted construction noise effects from Table 12.1 in Section 12.1 are predicted to be typically acceptable and the noise level inside comply with 35 dB L Aeq in CRL designation condition 31.1 with the windows and doors closed and air conditioning on. 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 C3 enabling works.

Page 67 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

Ms Poliko 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).

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.

TBC

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).

C21.3 Review Process

If Ms Poliko or other Bear Park representatives request consultation in the future, this SSCNVMP 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 designation 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 Communications records are contained in the communication and consultation plan (CCP). This SSCNVMP will be updated to summarise engagement and any agreed site-specific measures.

Page 68 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs