Japanese Knotweed Treatment & Disposal

Rapid Decontamination of Japanese Knotweed Impacted Soils – Persimmon Homes

The Challenge

ATG Group’s Eraginate, 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.
  • 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.

The Solution

Safely relocated 6,000 tons of Japanese Knotweed contaminated soils
to a treatment area on site.

Eraginate 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 Benefits

Benefit 1

Result 1

Treatment of the soils was completed in 4 weeks meaning site plans were able to proceed without delay.

Benefit 2

Result 2

Net savings to the client of more than 60% (£120,000).

Benefit 3

Result 3

6,000 tonnes of soil was available for reuse on site by the end of the 4 week treatment period, meaning the client didn't have to import soils saving a large sum of money.

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