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CL:AIRE is a UK charity committed to providing a valuable service for all those involved in sustainable land reuse.
We develop training resources, disseminate information and act as a credible resource for all stakeholders, ensuring we remain at the cutting-edge of best practice and innovation.

 

Improving efficiency & raising standards
Improving efficiency & raising standards
Definition of Waste Code of Practice (DoWCoP), National Quality Mark Scheme for Land Affected by Contamination (NQMS), Asbestos in Soil, SuRF...
Supporting our Members
Supporting our Members
Find out about the benefits of becoming a CL:AIRE Principal or Supporter Member:- Member discounts, Networking, Working Groups, ...
Sharing Knowledge & Developing People
Sharing Knowledge & Developing People
Water and Land Library ( WALL), Continuing Professional development through Training and workshops...
CL:AIRE Membership
CL:AIRE works with its Members to raise awareness and pursue shared objectives in land, water and environmental management by collecting strategic industry information and developing industry initiatives that improve efficiency and save money.
Gas Protection Verification Scheme (GPVS)
The GPVS seeks to raise standards in membrane inspection, verification and reporting and provide confidence that risks associated with ground gases have been adequately managed.
Definition of Waste Code of Practice
The Definition of Waste Code of Practice (DoWCoP) provides a clear, consistent and efficient process which enables the reuse of excavated materials on-site or their movement between sites.

Find out more...Register of materials...
Make a declaration...
NQMS for Land Contamination Management
The National Quality Mark Scheme for Land Contamination Management (NQMS) is developed by the National Brownfield Forum to provide visible identification of documents that have been checked for quality.

Article Index

Cluster Guide

Download Cluster Guide 2012>>>

The Cluster approach is designed to facilitate the remediation and / or development of a number of sites that are located in relative close proximity and share a decontamination / treatment facility located on a single site – the Hub site.

Cluster projects have three guiding principles in that they are:

  • Temporary – operate only as long as the sites defined within the Cluster are being remediated / developed.
  • Local – demonstrably appropriate in terms of geographical distance, relative savings, practical issues etc. for each of the participating sites.
  • A more sustainable way of developing land.


The Cluster concept has been proven at the commercial and full-scale and subsequently at a number of sites since the Definition of Waste: Development Industry Code of Practice (DoWCoP) was launched in September 2008. The lessons learnt from those projects have been used to develop this guide which will aid others in identifying the various benefits, challenges and solutions in establishing a Cluster and how to make it work effectively.

The guide introduces the terms “Hub site”, “Donor site” and “Receiver site” as a way of identifying and distinguishing whether sites in a Cluster are acting, respectively, as the treatment Hub, donating wastes or materials to be treated / reused or receiving treated materials for use within a development. Sites can act as both Donor and Receiver sites.

This guide sets out the various indicative roles and responsibilities of people and organisations within a functioning Cluster. The inter-relationships of different parties and the documentation that has to be produced are illustrated by comparing the documentation associated with a Cluster project and a standalone remediation project, which is not dissimilar.

Stakeholders may benefit from Cluster in different ways as discussed within this document. The main benefiting parties could include:

  • Landowners
  • Developers
  • Contractors
  • Consultants
  • Local authorities
  • Local communities


This guide also identifies the issues associated with the conceptualisation of a project and the considerations that will influence the choice of remediation technology located at the Hub site.

Town and Country Planning issues have been reviewed and different scenarios are illustrated. The need for flexibility in relation to relative timing of import, export and phasing of operations has been highlighted. This is seen as being a particularly important factor if the true sustainable benefits of operating Clusters are to be realised.

Cluster represents a significant step forward in terms of options for managing land contamination and developments. The concept is explicitly covered in “The Definition of Waste: Development Industry Code of Practice (CL:AIRE Version 2 March 2011)” which is freely available at www.claire.co.uk/cop and is referred to as the “CoP” within this document. The DoWCoP provides a mechanism to identify that excavated and treated materials have ceased to be waste and hence can be used at Receiver sites within a Cluster without the need for an Environmental Permit or waste exemption.

The different contractual arrangements that may have to be entered into, dependent on the Cluster make-up are identified and explained, as well as insurance products that are currently available in the market place.

The lessons learnt from previous projects illustrate that whilst all of the pre-operational matters can be largely addressed by good preparation and planning, the true potential of Cluster will rely on all stakeholders recognising the importance of flexibility, particularly in relation to timeframes. Appropriate risk-based decision making will also be critical to unlocking the true potential of the Cluster concept.

  1. CLR Expo announces speaker line-up

    CLR Expo announces speaker line-up

     August 2025
    The Contamination & Land Remediation Expo (CLR Expo - 17 & 18 September) has announced its speakers for this year's event. The CLR Expo speaker line-up brings together leading names...
  2. RemTech Europe 2025 programme available and registration open

    RemTech Europe 2025 programme available and registration open

     August 2025
    The updated programme for RemTech Europe 2025 (15-19 September 2025) is now available and registration is open. This year’s edition offers a unique opportunity for regulators and experts to stay updated on...
  3. EPA publishes practical PFAS groundwater science guide

    EPA publishes practical PFAS groundwater science guide

     August 2025
    The US Environmental Protection Agency (EPA) Office of Research and Development has published an easily digestible information guide for site assessment and remediation practitioners who work on PFAS-contaminated sites. Topics...
  4. Denmark establishes a PFAS hub for knowledge and research

    Denmark establishes a PFAS hub for knowledge and research

     August 2025
    Denmark has established the "PFAS Center" to generate knowledge and conduct research into how to prevent, contain and clean up extensive contamination with PFAS. The initiative has been funded by the...
  5. OVAM expands its list of PFAS suspected activities

    OVAM expands its list of PFAS suspected activities

     August 2025
    OVAM (Public Waste Agency of Flanders/Belgium) has published a report which expands the list of PFAS-suspected activities - highlighting growing contamination risks across production, processing, product use, and waste management.
  6. ECHA publishes updated proposal to restrict PFAS substances under REACH

    ECHA publishes updated proposal to restrict PFAS substances under REACH

     August 2025
    The European Chemicals Agency (ECHA) has published the updated proposal to restrict per- and polyfluoroalkyl substances (PFAS) under the EU’s chemicals regulation, REACH. Further information is
    Defra consults on reforming environmental permitting framework for industrial emissions

    Defra consults on reforming environmental permitting framework for industrial emissions

     August 2025
    Department for Environment, Food & Rural Affairs (Defra) is seeking views on proposed reforms to environmental permitting for industry. It covers the permitting of ‘industrial’ activities under the
  7. HSE consults on restricting PFAS in firefighting foam

    HSE consults on restricting PFAS in firefighting foam

     August 2025
    The Health and Safety Executive (HSE), as the Agency for UK REACH, has assessed the risks linked with using per- and polyfluoroalkyl substances (PFAS) in fire fighting foams, and the...
  8. National Brownfield Forum July 2025 meeting notes now published

    National Brownfield Forum July 2025 meeting notes now published

     August 2025
    The National Brownfield Forum meeting July 2025 meeting notes have now been published and are available to download here: July 2025 Meeting Notes...
  9. Government consults on National Underground Asset Register regulations

    Government consults on National Underground Asset Register regulations

     August 2025
    The Government Digital Service (GDS) is currently openly consulting on the initial tranche of regulations which relate to the National Underground Asset Register (NUAR). NUAR is designed to provide instant,...
  10. POST is carrying out research regarding pollution challenges from legacy landfills

    POST is carrying out research regarding pollution challenges from legacy landfills

     August 2025
    The Parliamentary Office of Science and Technology (POST) is carrying out research to understand the scale of the pollution challenges arising from legacy landfills. If you wish to contribute to...
  11. Defra publishes interim approach to the PMT concept to support UK REACH risk management of PFAS

    Defra publishes interim approach to the PMT concept to support UK REACH risk management of PFAS

     July 2025
    The Department for Food and Rural Affairs (Defra) has published a policy paper setting out an interim approach to the persistent, mobile and toxic (PMT) or very persistent, very mobile (vPvM)...
  12. Contamination & Land Remediation Expo returns to NEC Birmingham in September 2025

    Contamination & Land Remediation Expo returns to NEC Birmingham in September 2025

     July 2025
    Register for your free Contamination & Land Remediation Expo (CLR Expo) tickets today! The CLR Expo is a part of the UK’s largest event for the environmental services industry, Environmental...
  13. CL:AIRE’s Talent Pool

    CL:AIRE’s Talent Pool

     July 2025
    We’ve recently introduced a Talent Pool to help us stay in touch with individuals who are interested in the work we do at CL:AIRE. It’s a simple way to register...
  14. New CL:AIRE TRG Member

    New CL:AIRE TRG Member

     July 2025
    CL:AIRE is delighted to announce that its Technology and Research Group (TRG) has a new member - Amy Juden, The Environmental Protection Group Ltd. A short biography is provided below.  The TRG...
  15. Environment Agency publishes its latest corporate strategy report

    Environment Agency publishes its latest corporate strategy report

     July 2025
    The Environment Agency has published its latest corporate strategy report titled: EA2030 change for a better environment. The strategy sets out its vision for the Environment Agency over the next five years...
  16. Transitional period ends for NHBC 2007 ground gas guide

    Transitional period ends for NHBC 2007 ground gas guide

     July 2025
    National House-Building Council (NHBC) has now officially withdrawn its support for the 2007 guidance document: Evaluation of development proposals on sites where methane and carbon dioxide are present, following the transitional...
  17. Defra and Welsh Government publish reforms to the waste exemptions system, including the U1 exemption

    Defra and Welsh Government publish reforms to the waste exemptions system, including the U1 exemption

     July 2025
    The Department for Environment, Food and Rural Affairs (Defra) and Welsh Government have published proposed changes to the waste exemptions system, including the U1 exemption. Full details along with the transitional arrangements...
  18. New soil sustainability resource for planners

    New soil sustainability resource for planners

     July 2025
    The Soils in Planning and Construction Task Force recently launched its Local Soils Model Policy and Guide. It is a free resource designed to help local authorities embed soil sustainability...
  19. Defra calls for evidence about expanding the role of private sector investment in nature recovery

    Defra calls for evidence about expanding the role of private sector investment in nature recovery

     July 2025
    The Department for Environment, Food and Rural Affairs (Defra) is seeking evidence and insights on how to support and incentivise private sector investment in nature recovery especially those sectors which...
  20. National Brownfield Forum publishes the results of its task and finish group research work

    National Brownfield Forum publishes the results of its task and finish group research work

     July 2025
    The National Brownfield Forum (NBF) task and finish group has published its report Interactions between Government policies affecting the planning and development of brownfield land in England. The report is...