C2
12-14 Nikau Street SSCNVMP C2.1 Introduction This Site Specific Construction Noise and Vibration Management Plan (SSCNVMP) is for the residential building located at 12-14 Nikau Street. It is reproduced from the Mt Eden Enabling Works CNV DWP, where construction was predicted to exceed the standards in CRL designation conditions 31 and 33. A SSCNVMP is not required for the Mt Eden Station Main Works. It is included for information to ensure consistency across project stages. This SSCNVMP has been prepared in accordance with CRL designation conditions 37 and 38 and is Appendix C2 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 and vibration exceedances at 12-14 Nikau Street. 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.
C2.2 Engagement Mt Eden Enabling Works (for information) Link Alliance representatives Sonya Leahy, Thibaut L'Hopital, Rick Galli, Aidan Kirkby-McLeod and Craig Fitzgerald met with Rod Pratt (building owner) on 3 September 2019. The matters discussed included: •
An overview of the project
•
General programme, demolition, piling, rock breaking/blasting and tunnelling activities
•
Overview of the CNV DWP and this SSCNMP, communications triggers and protocol
•
Building layout and identification of any noise sensitive spaces
The double level commercial building has been converted into a block of 13 residential units above a basement car park. The neighbouring building will be demolished to maintain access to Flower and Shaddock Streets. It is adjacent to the portal piling and excavation works. Figures B.1 and B.3 in Appendix B of the Mt Eden Enabling Works CNV DWP shows that the south façade is predicted to be exposed to noise levels up to 93 dB LAeq during the closest demolition and bored piling activities, exceeding the 75 dB LAeq noise limit. Activity specific mitigation and management measures are included in Section 9 of the CNV DWP and not repeated here (e.g. Section 9.8 piling). The building has a concrete block wall with no windows on the western façade facing the works, which will mitigate noise received inside adjacent apartments. The north and south façades include operable glazing and appear to have a shallow pitched steel roof. The estimated sound level difference across the façade with the windows and doors closed is in excess of 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 some disturbance in the western most apartments during demolition of the neighbouring building. Physical receiver mitigation, such as temporary relocation of affected receivers, alternative Page 17
| Mt Eden Main Works CNV DWP – Appendix C SSCNVMPs
