Noise and Vibration Management Plan

272 302 Great North RdGrey Lynn

Information and procedures for the environmental management of demolition activities on this site.

1.0 INTRODUCTION2.0 NOISE PERFORMANCE STANDARDS3.0 DEMOLITION METHODOLOGY4.0 NOISE MITIGATION AND CONSULTATION5.0 VIBRATION MITIGATION MEASURES

1.0 INTRODUCTIONThis noise management plan is for the demolition of the buildings at 272 302 Great North Rd. The buildings are located in Grey Lynn, Auckland. In a commercial zoning but there are residential buildings in close proximity to the rear of the site on Dean Street as well as a child care center.Primary sources of noise will be excavator mounted breakers demolishing masonry structures. The loading of concrete and rubble into trucks. The use of chainsaws and concrete saws.

2.0 NOISE PERFORMANCE STANDARDSThe criteria for construction noise in commercial areas levels as set in the resource consent from NZS 6803P:1984From Table 2 recommended upper limits (dBA) levels of construction work noise for industrial or commercial areas.Time period L10 Noise level (dBA)7:30 18:00 70Proposed Hours of operation are going to be 7:00 18:30 Monday to Friday and 8:00 14:00 on Saturday with no work on Sundays or Public Holidays.

3.0 DEMOLITION METHODOLOGYThe demolition methodology is outlined in the method statement.Most of the buildings on site are constructed of masonry and steel / timber. In general the primary source of noise and vibration is the breaking of concrete slabs and foundations in the ground, and to a lesser extent the breaking of concrete structures above ground because hydraulic powered jaw and crushing attachments will be used wherever possible to reduce the amount of noise generated from the work. There will be solid plywood hoarding barriers on the perimeter of the site but they will have little to no effect when the work being carried out is at height.Historical noise level measurements taken from the machinery to be used on this site in similar activities are towards the upper end of the scale but are generally compliant with levels set when conducting similar activities. 4.0 NOISE MITIGATION AND CONSULTATIONConsultation with residents and other affected parties will be carried out prior to commencement of construction activities.Written notification and project description shall be provided to building occupiers adjacent the work area to make residents and businesses aware of the project and its expected activities and durations.Individual notifications shall be provided with point of contact details for project management staff, and discussions shall be held on a case by case basis if required by the residents/business owners. To ensure that the affected parties are well informed of the proposed activities and have an opportunity to express their concerns to a named delegate of the construction contractor. Where practicable, the management or scheduling of specific activities to a time that suits an affected party. In consideration to the adjacent residential building occupiers, activities that are likely to generate high levels of noise will not commence until after 8:30 in the morning and loading of trucks will not commence until after 9:00 due to the vehicle movement restrictions in the traffic management plan. Hours of work as set in the resource consent will be adhered to.MonitoringNoise measurement surveys shall be conducted at the start of each phase of the demolition to ensure compliance for the full range of activities. Any noise complaints or monitoring requests from residents shall also be addressed on a case by case basis.Compliance with New Zealand Standard NZS6803:P1984 Acoustics Construction Noise will be monitored throughout the demolition process. Monitoring will be conducted by a suitably qualified and experienced person using equipment which complies with NZS 6801:1991 Measurement of Sound and NZS 6802:1991 Assessment of Environmental SoundContingency MeasuresIn the event that there is a complaint or an incidence of non-compliance the procedures to be employed to rectify the situation within a 24-hr response time frame will involve:Utilisation of alternative demolition methods if available.Implementation of additional temporary noise mitigation measures. Additional localised temporary noise barriers / screens.Additional noise surveys in order to identify the non-compliant activity and to subsequently to show the effectiveness of noise mitigation measures.Procedures for the Handling of Noise Complaints Contact details for the person assigned to receive complaints shall be provided to all potentially affected persons during the initial written notification.On-site signage will have the contact details for the contractor and client. Advising residents to direct initial complaints to the project manager who will keep records of the complaint and preliminary investigation findings. A complaints file will be maintained in the project office available for both affected parties and Auckland Council regulatory inspection.

For any on-going complaints or issues, response will include additional measurements may need to be conducted targeting specific noise sources and times of day to determine noise sources and measuring levels at the source of the complaintReporting of findings and recommendations communicated with the complainant and actions and time taken to close out the complaint.

5.0 VIBRATION MITIGATION MEASURESMajor sources of vibration are likely to be dropping of masonry walls, the movement across the ground of heavy plant, and the breaking of concrete in particular ground slabs or foundations using excavator mounted hydraulic breakers. It is generally accepted that vibration levels which may be subjectively classed as strongly perceptible and even disturbing may be quite safe in terms of building damage criteria.The limits set to avoid structural damage to buildings generally used is the German Standard DIN 4150 Part 3:1986 Guidelines in appendix 1 Vibration measurement as with noise measurement to be carried out by a suitably qualified and trained person using recording equipment designed for the task.Again consultation and communication with adjacent properties is of the foremost importance.A dilapidation survey of the adjacent properties, including footpaths and roads is to be carried out before commencement of demolition and construction. To enable the monitoring of any degradation due to demolition and construction vibration.A similar approach to the mitigation of noise is required for activities which generate vibration.Any Vibration complaints or monitoring requests from residents shall also be addressed on a case by case basis.Monitoring of vibration will be put in place when requested to determine if the levels of vibration exceed the levels set.Alternative methodologies will have to be adopted if acceptable vibration levels are exceeded.