C17
5a Fenton Street SSCNVMP C17.1 Introduction This Site Specific Construction Noise and Vibration Management Plan (SSCNVMP) is for the commercial building located at 5a Fenton Street. A SSCNVMP is required because construction is predicted to exceed the Project Standards in CRL designation conditions 31 and 33. This SSCNVMP has been prepared in accordance with CRL designation condition 37 and 38 and is Appendix C17 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 SSCNVMP is to detail the best practicable option(s) (BPO) to avoid, remedy or mitigate the identified adverse effects from noise and vibration exceedances at 5a Fenton Street. This SSCNVMP 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 SSCNVMP previously prepared and implemented for the Mt Eden Enabling Works.
C17.2 Engagement Mt Eden Enabling Works (for information) Link Alliance representatives Duncan Whyte, Hilary Konigkramer and Richard Deane met with Danny Bracks (Office Relocations) on 10 September 2019. The matters discussed included: •
An overview of the project
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General programme of works, rock breaking activities
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Overview of the CNV DWP and this SSCNVMP, communications triggers and protocol
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Building layout and identification of any noise sensitive spaces/activities
Office Relocations offices occupy the ground level of the building, facing north to the works. Rock breaking activities are required in close proximity to this building for short periods. Figures B.7 and B.8 in Appendix B of the Mt Eden Enabling Works CNV DWP predict rock breaking noise levels of up to 80 – 90 dB LAeq on the west façade. While this significantly exceeds the 75 dB LAeq noise limit, levels will reduce rapidly as works migrate away. Other utilities works will generally be compliant. 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 masonry façade, openable windows and a shallow pitched steel roof. The estimated sound level difference across the façade with the doors closed is 25 – 30 decibels. The predicted construction noise effects from Table 12.1 in Section 12.1 are predicted to result in short-term noise disturbance. 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. Danny Bracks raised concerns over levels of vibration resulting in damage in the companies glassware and crockery. Preliminary large excavator mounted rock breaker vibration level predictions (Section 6.2 of the Enabling Works CNV DWP) identify that there is potential to Page 56
| Mt Eden Main Works CNV DWP – Appendix C SSCNVMPs
