C3
10 Flower Street SSCNVMP C3.1 Introduction This Site Specific Construction Noise and Vibration Management Plan (SSCNVMP) is for the residential building located at 10 Flower 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 32. 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 C3 of the CRL 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 and/or vibration exceedances at 10 Flower Street. This SSCNVMP has been prepared for the Link Alliance and forms part of the Construction Environmental Management Plan (CEMP) for the Mt Eden Station Main Works.
C3.2 Engagement Mt Eden Enabling Works (for information) Link Alliance representatives Sonya Leahy, Thibaut L'Hopital, Aidan Kirkby-McLeod, Duncan Whyte and Craig Fitzgerald met with building representative Wayne Brown (building manger) on 5 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 SSCNVMP, communications triggers and protocol
The modern multi-level terraced apartment building features basement car parking beneath three levels of apartments with balconies on all sides. The car parking basement is block and concrete tilt slab construction. The apartments above are a built with a timber structure. There are 42 apartments in total. Figures B.1 – B.7 in Appendix B of the Mt Eden Enabling Works CNV DWP shows that the south and west façades are predicted to be exposed to noise levels between 75 – 80 dB LAeq during the closest demolition, bored piling, rock breaking and vibro 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 9.7 concrete and rock breaking and 9.8 piling). The top floor apartments (most exposed to site noise) are primarily occupied by university students. Mr Brown commented that the scheduling of blasting activities, indicatively timetabled for February – March 2020, would avoid normal exam study periods. There are 5 families, but only one is located on the most exposed western façade at first level. The perimeter site hoardings will effectively mitigate noise for this family. The building façade features fibre cement cladding, well-sealed operable glazing and a flat steel roof. 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 Page 19
| Mt Eden Main Works CNV DWP – Appendix C SSCNVMPs
