Invasive species

As a utility provider, landowner, statutory undertaker, developer or contractor, invasive species cause a serious problem, which can cause costly delays to your project and development. ADAS have a wealth of experience in addressing, avoiding and eliminating issues caused by invasive species.

Plant species referred to as invasive species are generally listed on Schedule 9 of the Wildlife and Countryside Act 1981 (as amended). Under this act, it is a legal requirement to control the plant species listed under Schedule 9. The Infrastructure Act 2015 gives the relevant environmental authorities in England and Wales the power to issue species control orders. These orders make it possible to compel land owners or occupiers to carry out control or eradication operations.  

ADAS’s parent company, RSK is a consultant member of INNSA – the UK’s leading non-native species association. Working closely with INNSA, we work to a set of technical standards and best practice guidance.

Invasive species frequently found on development sites include Japanese knotweed, Himalayan balsam and Giant hogweed.  

We are able to provide a unique approach, which enables our clients to benefit from our extensive research, crop, consultancy and contracting expertise.  We provide our clients with a bespoke solution, ensuring that we fully understand their aims, requirements and associated budgetary constraints.  Where necessary, we are able to provide an insurance backed guarantee for all of the works that we carry out.

We undertake a range of invasive species works including; invasive species walkover surveys, herbicide treatment, stem injection, excavation, on-site burial, encapsulation, soil screening, bunding, muck-away and off-site disposal.

We are able to provide a range of services including:

  • Initial advice and consultation, with a suitably experienced Japanese Knotweed Surveyor.  
  • Detailed site survey to map and identify any invasive species on site, along with any associated site constraints.
  • Production of insurance-backed remediation strategies, outlining our findings, recommendations and costed proposals for further treatment works.
  • Provision of a qualified and suitably experienced invasive species clerk of works.
  • Herbicide treatment using a combination of knapsack, ATV and tractor mounted sprayers.
  • Stem injection of Japanese knotweed, Giant hogweed and Rhododendron.
  • Excavation and on-site bunding.
  • Excavation and on-site screening and sorting.
  • Excavation and on-site burial of contaminated material with inert cover
  • Excavation and on-site burial of invasive species within a heat-welded cell or other appropriate membrane.
  • Muck-away of invasive plant material to a licensed waste disposal facility.
  • Control and treatment of aquatic invasive species such as; floating pennywort, parrots feather and water primrose.
  • I was very impressed with how they were able to undertake the works ahead of programme and would not hesitate to use them again for future works.

    Robin How
    Project Manager, Kier

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ADAS is a trading name of RSK ADAS Ltd. Registered in England No. 10486936

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