C30 26 Normanby Road SSCNMP

C30 26 Normanby Road SSCNMP

C30.1 Introduction

This Site-Specific Construction Noise Management Plan (SSCNMP) is for the commercial building located at 26 Normanby Road. A SSCNMP is required because construction is predicted to exceed the Project Standards in CRL designation condition 31. This SSCNMP has been prepared in accordance with CRL designation condition 37 and is Appendix C30 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 26 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.

C30.2 Engagement

Normanby Rd Early Works (for information)

Link Alliance representatives Hilary Konigkramer and Craig Fitzgerald met with Bo (Owner of Sen Restaurant) on 10 October 2019. The matters discussed included:

An overview of the Normanby Road early works.

General programme and utilities trenching works in Normanby Road.

Overview of the CNV DWP and this SSCNVMP, communications triggers and protocol. The building is a double level industrial building that has been converted into a restaurant called Sen Vietnamese Kitchen & Bar. The restaurant is open Monday to Saturday, 10am –3pm and 5pm –10pm. Figure B.2 in Appendix B of the of the Normanby Rd Early Works CNV DWP shows that the east and south façades are predicted to be exposed to noise levels between 75 –85 dB L Aeq during the closest utilities works, 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 9.4 general mitigation measures). The masonry building has a small number of small windows and a flat steel roof over timber sarking. The estimated sound level difference across the façade with the windows and doors closed is 25 –30 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 short term disturbance for the utilities works locally in Normanby Road. Other more distant works are not predicted to impact activities on this site. 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. Preliminary compaction vibration level predictions (Section 6.2 of the Enabling Works CNV DWP) identify that there is potential to exceed the Heritage cosmetic building damage thresholds at the South eastern end of the building. Cosmetic building damage effects are deemed ‘minor damage’ in the DIN Standard (Section 5.2), such as cracking in paint or

Page 90 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

plasterwork, and can generally be easily repaired. A pre-construction building condition survey in accordance with condition 46 will ensure any damage is identified for remediation. Mr Bo agreed that prior communication of timeframes for works with the potential to exceed the relevant noise/vibration 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. 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) 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).

C30.3 Review Process

If Mr Bo requests consultation in the future, As required under CRL designation condition 37.5, with consideration given to the following:

The extent to which noise and/or vibration may exceed the Project 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 91 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs