THE CHALLENGE:
The site was previously used as a refuse tip, with extensive historical infilling and ground raising with demolition wastes. Buried structures were present including a network of tunnels (formerly used by the fire service for confined space training), and a fuel tank farm. A number of buildings were present on site, some of which included HSE-licensable asbestos containing materials (ACMs). The site had become overgrown with significant vegetation cover, including a number of invasive species (mainly Japanese Knotweed and Himalayan Balsam). The proposed residential scheme required the reprofiling of site levels as well as a series of development platforms, to enable the site with a ’suitable for use’ development platform.
OUR SOLUTION:
Soilfix implemented a multi-disciplinary scope, fully in accordance with a Materials Management Plan developed using CL:AIRE DoWCoP, including:
- Ecological surveys, invasive weed management, and controlled vegetation/tree clearance;
- Segregation and removal offsite (for recycling) of 200 tonnes of fly-tipped wastes;
- Removal of ACMs from buildings including the use of enclosures and enhanced suppression, followed by controlled demolition of all structures;
- Decommissioning and breakout of 12 former fuel tanks, including contaminated soils;
- Breakout of the tunnel network followed by engineered filling and compaction;
- Recording of archaeological finds to help document Bristol’s local history;
- Breakout and processing of hardstanding & sub-structures to produce approx. 4,000m3 of recycled aggregates, for sustainable reuse on site and avoid the need to import;
- Excavation, modular processing and re-engineering of approx. 20,000m3 made ground;
- Installation of 8,000m2 of working platforms including temporary works design and testing to FPS requirements.
Soilfix handed over a fully enabled site to Vistry ready for piling and construction, including a comprehensive verification report for the future discharge of regulatory planning conditions.
