The brief
- Time critical project – The landowner was in the process of selling the site and due to exchange imminently.
- Proposed £70 million HQ for major supermarket chain
- A 6,300m3 soil stockpile containing Japanese Knotweed had been identified and required excavation and off site removal/ disposal.
- Japanese Knotweed was also identified growing along the North West boundary of site.
- There was a large amount of fly-tipped waste and waste concrete.
After liaising with the client and careful consideration of site constraints, time available and budgets, it was decided that complete excavation and licensed disposal of the Japanese Knotweed waste was the most appropriate remediation strategy.
The client wanted the site remediated and guaranteed, ready for the new site owners.
With significant vehicle movements required in and out of the site over a 2 week period, careful traffic management was required on the A240 Kingston Road.
Following the main excavation works a monitoring programme was carried out and a 10 Year Insurance Backed Guarantee issued. The developer was able to commence construction immediately with no restrictions.
What we did
- Principal contractor for works
- Full site set up including compound & offices, haul road creation and ongoing traffic management
- Excavation and off site removal of a 6,300m3 soil stockpile containing Japanese Knotweed within the 2 week deadline.
- Japanese Knotweed was also identified growing along the North West boundary of site. This was excavated and disposed of at a licensed landfill.
- Crushing of waste concrete and recycling
- Fly-tipped waste removal
- Site clearance and preparation
- Road sweeper services
The outcome
- Works were completed within the 2 week timescale and on budget
- Land sale completed with no issues
- Monitoring Programme & 10 Year Insurance Backed Guarantee issued for the site
