C20 2 Haultain Street SSCNMP

C20 2 Haultain Street SSCNMP

Page 65 C20.1 Introduction

This Site Specific Construction Noise Management Plan (SSCNMP) is for the commercial building located at 2 Haultain Street. A SSCNMP is required because construction is predicted to exceed the noise standards in CRL designation condition 31. This SSCNMP has been prepared in accordance with CRL designation condition 37 and is Appendix C20 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 SSCNMP is to detail the best practicable option(s) (BPO) to avoid, remedy or mitigate the identified adverse effects from noise exceedances at 2 Haultain Street.

This SSCNMP has been prepared for the Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Mt Eden Main Works. It builds on the SSCNMP previously prepared and implemented for the Mt Eden Enabling Works.

C20.2 Engagement

Mt Eden Enabling Works (for information)

Link Alliance representatives Duncan Whyte, Hilary Konigkramer and Richard Deane knocked on the door on 10 September 2019. Unfortunately, the appropriate representative of Bootleg Design (unit 1) was not available. A general information pack with contact details was left. No response has been received to date to undertake further consultation.

Craig and Susanne Meldrum of WiPath (unit 2) offices occupy the ground and first level of the building, facing north over the works. 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 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 building is a lightweight façade, glazing and a flat steel roof. The estimated sound level difference across the façade with the doors closed is 20 –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. Mr and Ms Meldrum 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:

Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

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)

Fenton and Porters Ave (refer rock breaking and piling in Sections 9.7 and 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).

C20.3 Review Process

If Mr or Ms Meldrum or other 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 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 SSCNMP will be updated to summarise engagement and any agreed site-specific measures.

Page 66 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs