Strategy Overview: Excavation and backfill
JKSL Surveyor, Kate Hilton, completed a Japanese knotweed and invasive plant survey of the site on behalf of the client, producing AutoCAD drawings and a bespoke remediation strategy for the site which would allow the development to proceed uninhibited by the mature Japanese knotweed infestations.
Mechanical remediation was considered as the quickest solution to remove the Japanese knotweed from within the site boundary. This was favoured by the client as it allowed for a clean site immediately after demolition of existing buildings, thus reducing the risk of cross contamination during development works.
What We Did
JKSL excavated and removed from site all Japanese knotweed including soils, and then installed a 200m-long vertical root barrier along the site boundary.
The site was adjacent to a railway line, which was dense with Japanese knotweed growth.
A 5-year warranty will allow JKSL to monitor the infestation and administer a Glyphosate based herbicide to any re-growth which occurs over the site’s 5-year chemical treatment period, as well as any growth that emerges off-site, with permission from the neighbouring land-owner.
The areas were then backfilled by JKSL, with imported materials, to bring the site up to previous levels and leave things neat and tidy for the client moving forwards.
All of the works were signed off and completed within a 2-week period, with JKSL providing an in-house warranty, and Insurance Backed Guarantee options for the plots on site.
