Background
We were commissioned by Alpine Demolition and later RED Construction Group to assist in the preparation of a s.61 application and noise, vibration, dust and air quality management plans (NDVMP) for the demolition and redevelopment of Townsend House, 5 Greycoat Place, Westminster, SW1P 1BL.
The Challenge
The primary challenges of this project included:
- Noise Management: The proximity of residential buildings and a school necessitated stringent noise control measures.
- Dust Control: Demolition and construction activities can generate significant dust, impacting air quality and health.
- Vibration Mitigation: Vibration from demolition and construction can affect nearby structures and residents.
What we did
Commissioned first by Alpine Demolition, we produced an NDVMP to cover the demolition period from start of works until demobilisation following removal of demolition arisings (incidental rubbish).
RED Construction Group were then appointed as contractor for the development and retained our services to assist with updating the NDVMP to cover the earthworks and construction stage.
The NDVMP formed part of the Site Environmental Management Plan (SEMP) and also informed the s.61 application for the demolition works.
We identified the risk for adverse noise, dust, air quality and vibration effects which could be caused by the demolition of the existing building and construction activities for the redevelopment of the new building. Our plan included mitigation measures to ensure effective management of noise, dust and vibration emissions from the site and to help ensure that the principles of best practicable means (BPM) and best practice were fully implemented.
Demolition Stage
- Noise Control
We measured baseline noise levels to inform planning and produced a 3D demolition noise model to calculate activity and noise level predictions. This enabled us to set noise action levels with a maximum threshold.
- Dust Management
High sensitivity receptors were identified. Mitigation measures we proposed included regular site inspections, use of water sprays to suppress dust, and a dust management plan. Real-time dust and air quality pollutant monitors were installed across the site and visual observation was used to monitor dust levels.
- Vibration Reduction
Vibration criteria were established to prevent building and asset damage. Vibration levels were monitored to ensure they remained within acceptable limits. We used live monitoring systems with email alerts to manage vibrations effectively.
Construction Stage
We ensured a comprehensive monitoring regime for noise, dust, and vibration throughout the works which followed the Westminster Code of Construction Practice.
Continuous monitoring was conducted at various locations around the site, with live systems issuing alerts when trigger levels were exceeded. Monitoring data was available online for stakeholder access and included in monthly reports to the Westminster City Council environmental health officers.
Conclusion
The approach to noise, dust, and vibration management ensured minimal disruption to the surrounding community while maintaining safety and environmental standards.
