C26 8 12 Boston Road SSCNMP

C26 8 –12 Boston Road SSCNMP

Page 78 C26.1 Introduction

This Site-Specific Construction Noise Management Plan (SSCNMP) is for commercial buildings located at 8 –12 Boston Road. A SSCNMP is required because construction is predicted to exceed the Project Standards in CRL designation conditions 31. This SSCNMP has been prepared in accordance with CRL designation conditions 37 and is Appendix C26 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 8 –12 Boston 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.

C26.2 Engagement

Normanby Rd Early Works (for information)

Link Alliance representatives Sonya Leahy, Hilary Konigkramer and Craig Fitzgerald met with Dale De Penning and Steve Morris (representatives for Aspec Construction and the building’s owners –8-10 Boston Road), Mark Hall (MSH Architects), Guy Whately and Biddy Dunlop (Saturday –8 Boston Road) and Camilo (Float Culture –12 Boston Road) on 10 October 2019, and Michael (RGIS –12 Boston Road) on 14 October 2019. The matters discussed included:

An overview of the Normanby Road early works.

General programme, sewer trenching in their car park fronting Water Street, and the wider Normanby Road early work activities.

Overview of the CNV DWP and this SSCNMP, communications triggers and protocol. It is noted that Mr Kuznetsov (Float Culture) was not available, but previously raised concerns about noise and vibration as part of the CRL Contract 6 construction works (stormwater main realignment –in particular, piling activity associated with these works). His business provides sensory deprivation experiences for clients using water tanks located in water tanks within the building basement, and away from the exposed external façade of the building. For this reason, it is predicted that vibration is the primary concern. They take bookings from 8am - 10pm most days and are usually busiest on Saturdays. While the Figures in Appendix B of the Normanby Rd Early Works CNV DWP don’t show any predicted exceedances, the south and east façades are predicted to be exposed to noise levels between 75 –80 dB L Aeq during sewer trenching in their rear carpark over a series of days in May 2020. Due the proximity of these trenching works, the resulting noise levels are predicted to briefly exceed the 75 dB L Aeq measures are included in Section noise limit. Activity specific mitigation and management 9 of the CNV DWP and not repeated here (e.g. Section 9.4

general mitigation measures). The buildings at 8 –12 Boston Road are commercial buildings constructed from a mix of masonry and timber framed walls with sealed glazing. The estimated sound level difference across the façade with the windows and doors closed is 30 decibels. The predicted construction noise effects from Table 12-1 in Section 12.1 are predicted to be typically

Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

Page 79 acceptable, but with the potential for short term disturbance for the trenching works in their car park. 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. All 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).

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) 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).

C26.3 Review Process

If any site representatives or affected site representative’s requests consultation in the future, this SSCNMP will be updated in accordance with CRL designation conditions 37.5, with consideration given to the following:

The extent to which noise 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

Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs

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 80 Mt Eden Main Works CNV DWP –Appendix C SSCNVMPs