Japanese Knotweed & Treatment Disposal
Rapid Decontamination of Japanese Knotweed – Persimmon Homes
Click here to download the Persimmon Homes Case Study
The Challenge:
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.
Our Solution:
- 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.
The Results:
- 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
Click here to download the Japanese Knotweed Case Study
The Challenge:
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.
Our Solution:
- 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 Results:
- 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.
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