Japanese Knotweed & Treatment Disposal
Rapid Decontamination of Japanese Knotweed – Persimmon Homes
The eradZion8, rapid Japanese Knotweed treatment technology successfully eradicates Japanese Knotweed contamination from large volumes of soil stockpiles within 4 weeks. This reduced the client’s overall cost risk by 70%.
- During the redevelopment of a former industrial site for new residential housing, several stands of Japanese Knotweed were inadvertently spread across the site and later excavated and placed in a stockpile on site by the Client.
- Given the presence of Japanese Knotweed rhizomes within these soil stockpiles, the cost for the disposal off site to landfill would have exceeded £200,000.00.
- In addition the Client needed fill material to raise the site levels. The challenge therefore was to provide a solution which could rapidly remove any Japanese Knotweed contamination from the 6,000 tons of site soils to enable these soils to be reused safely on site as general fill.
- Safely relocated 6,000 tons of Japanese Knotweed contaminated soils to a treatment area on site.
- EradZion8 rapid treatment solution deployed on the site soils and within 4 weeks released treated knotweed free soils, which the Client could safely reuse on site as backfill.
- Treatment of approximately 6,000 tons of Japanese Knotweed contaminated soils within 4 weeks resulting in all soils being reused on site.
- Net savings to the client of more than 60% (£120,000.00).
Rapid Decontamination of Japanese Knotweed – Industrial Site
During the redevelopment of the former industrial site, Japanese Knotweed from the adjoining site had been inadvertently spread onto the Client’s site.
- The Client had previously engaged the services of a landscape gardener to spray the knotweed with a low grade herbicide, with little success.
- The knotweed was located within the critical path of the development programme – therefore a rapid solution was required.
- The estimate of costs to excavate and dispose off site was in excess of £120,000.00.
- Furthermore, the Japanese Knotweed located on the neighbouring site boundary would continue to re-infest the Client’s site and therefore an in-situ eradication programme was required for those stands.
- A detailed survey of the site was carried out and liaised with the Client over their programme expectations.
- EradZion8 technology utilised on the areas of the site which were critical to the development programme.
- In-situ eradicate technology utilised to spray and remove the knotweed in the adjacent neighbour’s site and installed a root barrier on the site boundary to prevent any re-infestation.
- Liaised with all the necessary regulators to gain approval for the methodology.
- The eradZion8 process was completed on approximately 1,000 tonnes of knotweed contaminated soils within a 4 week timescale. All the soils were reused on site.
- The in-situ eradicate spray programme was completed within 1 growing season.
- As our ongoing commitment to our Client, we continue to manage and treat any Japanese Knotweed growing on the neighbouring site.