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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.

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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. CL:AIRE launches PFAS webpage

    CL:AIRE launches PFAS webpage

     September 2025
    CL:AIRE has launched a PFAS webpage - a compilation of information relevant to the understanding and management of per- and polyfluoroalkyl substances (PFAS). On this page...
  2. European Council formally adopts the soil monitoring directive

    European Council formally adopts the soil monitoring directive

     September 2025
    The Council of the European Union has formally adopted the soil monitoring directive, establishing the first-ever EU wide framework for assessing and monitoring soils, with the overarching aspirational goal of...
  3. Environment Agency publishes rapid evidence assessment of PFAS incineration and alternative remediation methods

    Environment Agency publishes rapid evidence assessment of PFAS incineration and alternative remediation methods

     September 2025
    The Environment Agency Chief Scientist's Group has recently published a Rapid evidence assessment of PFAS incineration and alternative remediation methods report. This review assessed the effectiveness, feasibility and environmental suitability of...
  4. ECHA to consult on PFAS draft opinion in Spring 2026 plus information webinar

    ECHA to consult on PFAS draft opinion in Spring 2026 plus information webinar

     September 2025
    The European Chemicals Agency (ECHA) plans to launch an online consultation on the draft opinion of its Committee for Socio-Economic Analysis (SEAC) on the proposed EU-wide restriction of per- and...
  5. JRC publishes report on an approach to harmonise and standardise the collection of soil pollution data from across Europe

    JRC publishes report on an approach to harmonise and standardise the collection of soil pollution data from across Europe

     September 2025
    The European Commission's Joint Research Centre (JRC) has published a comprehensive approach to harmonising and standardising soil pollution data across Europe and provides information on the development of new policy...
  6. European Parliament reaches agreement to update priority substances in surface and groundwater

    European Parliament reaches agreement to update priority substances in surface and groundwater

     September 2025
    The Council presidency and the European Parliament’s representatives reached a provisional political agreement on a proposed directive to review and update the lists of pollutants affecting surface waters and groundwater...
  7. MHCLG consult on streamlining infrastructure planning

    MHCLG consult on streamlining infrastructure planning

     September 2025
    Ministry of Housing, Communities and Local Government is consulting on proposed changes to guidance, public sector services and secondary legislation to streamline infrastructure consenting for Nationally Significant Infrastructure Projects. Further...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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.
  13. 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
  14. 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...
  15. 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...
  16. 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,...
  17. 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...
  18. 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)...
  19. 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...
  20. 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...