Olympic Park Stratford, East London

Green Earth Management (GEMCO) provided waste management licensing services and development for the appropriate treatment methodology to eradicate Japanese Knotweed infestation from a significant volume of topsoil required for re-use on site.
Removal of Invasive weeds from topsoil.

Removal of Invasive weeds from topsoil.

GEMCO were responsible for the preparation and submission of the site specific working plan and deployment form to the Environment Agency. The application was determined within the 30 day consultation period, providing the client with very rapid mobilisation to site.
Over 6000 cubic meters of infested soils were treated to remove the plant matter and knotweed rhizome. The process allowed the recovery of a number of soil fractions that otherwise would have been waste. The suitable granular materials were separated from the topsoil fractions. The aggregate materials were suitable as engineering fill for use in the backfilling operations.
Residual waste removed during the separation process were sorted in accordance with water type and were re-cycled in accordance with site waste management requirements. The
use of this method presented significant cost and time savings against more traditional methods of dig and dump or herbicide treatment.
The treatment operations were undertaken during autumn and took approximately 8 weeks to complete.
Treated Soils for Re-Use

Treated Soils for Re-Use

The treated soils are regularly inspected for re-infestation and GEMCO are pleased to report there is no evidence of re-infestation in this growing season.

Provision of COTC Services to MTL Holder

GEMCO is in a position to provide a full remediation design and project management service, in addition to that our WAMITAB qualified COTC holders work with the client to ensure compliance with the waste management licence conditions. GEMCO also undertook environmental monitoring and advice on appropriate environmental controls to minimise the environmental impact and nuisance to site neighbours. Our representative visited the site on a regular basis to inspect the site in accordance with the regulations. The service included environmental monitoring services.
Directional Dust Monitoring During Soil Treatment

Directional Dust Monitoring During Soil Treatment


  1. Hi guys,

    Glad to say most of the Olympic Park is free of Japanese Knotweed, giant hogweed and Himalayan balsam.

    However, to the north of the site all three species are evident probably to about 200m south of A12! This area looks as if it has only been partly treated but as the Lea flows southwards and Hackney Marshes to the north that is infested with these species, I can see this being an ongoing problem.

    What can be done about this in the long-term, will the wild areas of the park which currently have kingfisher and reed warbler present be allowed to re-colonise with these invasive species, particularly as the money supply will undoubtedly fall with the progress of time?

    We shall see!


    Denis Vickers

  2. I’m interested in identifying 10 – 20 predominant weed species in the Olympic Park. Please can you suggest any online sources of information? Thank you.

Leave a Reply

Comment moderation is enabled. Your comment may take some time to appear.