C14 1 Wynyard Road SSCNMP

C14 1 Wynyard Road SSCNMP

C14.1 Introduction

This Site Specific Construction Noise Management Plan (SSCNMP) is for the residential building located at 1 Wynyard Road. A SSCNVMP is required because construction is predicted to exceed the noise standards in CRL designation condition 31. This SSCNVMP has been prepared in accordance with CRL designation condition 37 and is Appendix C14 of the Mt Eden Main 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 SSCNVMP is to detail the best practicable option(s) (BPO) to avoid, remedy or mitigate the identified adverse effects from noise exceedances at 1 Wynyard Road. This SSCNMP has been prepared for the Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Mt Eden Station Main Works. It builds on the SSCNMP previously prepared and implemented for the Mt Eden Enabling Works.

C14.2 Engagement

Mt Eden Enabling Works (for information)

In the absence of contact details, Link Alliance representatives Duncan Whyte, Hilary Konigkramer and Richard Deane knocked on the door on 10 September 2019. Unfortunately, there was no answer. A general information pack with contact details was left. No response has been received to date to undertake further consultation.

Figure B.5 in Appendix B of the Mt Eden Enabling 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 9 of the CNV DWP and not repeated here (e.g. Section 9.7 concrete and rock breaking). The residential building has a weatherboards façade with openable windows pitched steel roof. The estimated sound level difference across the façade with the doors closed is 25 decibels. The predicted construction noise effects from Table 12.1 in Section 12.1 are predicted to be typically acceptable, but with the potential for some disturbance for nearby rock breaking. 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. 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

Page 49 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

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.

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) 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).

C14.3 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 designation 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 effects

A statement of why they reflect best practicable option 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 50 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs