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.

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. Land Remediation Pathfinder Scheme - expressions of interest closing soon

    Land Remediation Pathfinder Scheme - expressions of interest closing soon

     April 2026
    Department for Environment, Food & Rural Affairs (Defra) has announced an Expression of Interest opportunity for the Land Remediation Pathfinder Scheme (LRPS). LRPS is a £80 million pilot scheme funded by Defra...
  2. Publication of MCERTS performance standard for rapid measurement techniques for the chemical testing of soil

    Publication of MCERTS performance standard for rapid measurement techniques for the chemical testing of soil

     April 2026
    On 27 April, the Environment Agency published new guidance called MCERTS: performance standard for rapid measurement techniques for the chemical testing of soil. The guidance describes the certification process for rapid...
  3. The Environmental Monitoring & Measurement Achievement Awards (the EMMAs) - call for nominations from land remediation industry

    The Environmental Monitoring & Measurement Achievement Awards (the EMMAs) - call for nominations from land remediation industry

     April 2026
    The Environmental Monitoring & Measurement Achievement Awards (the EMMAs) will return to Birmingham this year with an expanded scope, recognising excellence within the geoenvironmental and land remediation sector for the...
  4. New CL:AIRE Research Bulletin (RB22) published on legacy wastes in the coastal zone

    New CL:AIRE Research Bulletin (RB22) published on legacy wastes in the coastal zone

     April 2026
    CL:AIRE is pleased to publish a new research bulletin RB22: Legacy Wastes in the Coastal Zone which is available to download here. Legacy Wastes in the Coastal Zone: Environmental Risks and Management...
  5. EPA Ireland consults on developing national guidance for brownfield soil and stone by-product material

     April 2026
    The Environmental Protection Agency (EPA) Ireland has published a position paper for consultation as part of the development of national guidance for brownfield soil and stone by-product material. The guidance...
  6. UK Parliament's Environmental Audit Committee publishes its PFAS report

    UK Parliament's Environmental Audit Committee publishes its PFAS report

     April 2026
    The UK Parliament Environmental Audit Committee has now published its report Addressing the risks from Perfluoroalkyl and Polyfluoroalkyl Substances (PFAS) following its inquiry and call for evidence in April 2025.
  7. National Brownfield Forum March 2026 meeting notes now published

    National Brownfield Forum March 2026 meeting notes now published

     April 2026
    The National Brownfield Forum March 2026 meeting notes have now been published and are available to download here.
  8. Defra consults on BNG and targeted exemptions for brownfield residential developments

    Defra consults on BNG and targeted exemptions for brownfield residential developments

     April 2026
    Department for Environment, Food & Rural Affairs (Defra) is consulting on a possible exemption from biodiversity net gain (BNG) for certain residential developments on brownfield land. Further information is available here.
  9. HSE launches consultation on Reporting of Injuries, Diseases and Dangerous Occurrences Regulations (RIDDOR)

    HSE launches consultation on Reporting of Injuries, Diseases and Dangerous Occurrences Regulations (RIDDOR)

     April 2026
    The Health and Safety Executive (HSE) has launched a consultation on the Reporting of Injuries, Diseases and Dangerous Occurrences Regulations 2013 (RIDDOR) and it is now open for comments. The consultation seeks...
  10. Phase 2 of DoE Industry Profiles project is now complete

    Phase 2 of DoE Industry Profiles project is now complete

     March 2026
    A project to update 15 of the Department of Environment (DoE) series of 47 industry profiles has now finished with funding from the Environment Agency, Association of Geotechnical & Geoenvironmental...
  11. Defra publishes Land Use Framework for England

    Defra publishes Land Use Framework for England

     March 2026
    Department for Environment, Food & Rural Affairs (Defra) has published the Land Use Framework for England. It sets out how England can use its land more effectively. The Framework has...
  12. CL:AIRE connects the industry: Bristol networking evening sets the scene for summer event

     March 2026
    CL:AIRE hosted another successful members' networking event, this time in Bristol at Racks Bar and Kitchen. The evening brought together professionals from across the sector for relaxed, informal conversation. CL:AIRE Members...
  13. Environment Agency publishes national groundwater nitrogen inventory for England

    Environment Agency publishes national groundwater nitrogen inventory for England

     March 2026
    The Environment Agency Chief Scientist's Group has published outputs from a research project: National groundwater nitrogen inventory for England (SC210008). The project developed and tested new approaches to assess national-scale...
  14. Defra consults on amendments to the POPs regulation 2026

    Defra consults on amendments to the POPs regulation 2026

     March 2026
    Department for Environment, Food & Rural Affairs (Defra) is seeking views on proposed changes to the Persistent Organic Pollutants (POPs) Regulation, including drafted legislation to prohibit five new POPs to...
  15. RBKC Lead Modelling Tool published on WALL

    RBKC Lead Modelling Tool published on WALL

     March 2026
    The Royal Borough of Kensington and Chelsea (RBKC) Lead (Pb) values and modelling tool has been made available for all to use on the CL:AIRE Water and Land Library (WALL).
  16. BSI publishes document on ecological soil functions

    BSI publishes document on ecological soil functions

     March 2026
    British Standards Institution (BSI) has recently published PD ISO/TS 18721:2026 Ecological soil functions - Characteristics, indicators and methods. Further information and purchase options available here.
  17. SoBRA publishes two new NAPL guidance documents

    SoBRA publishes two new NAPL guidance documents

     March 2026
    The Society of Brownfield Risk Assessment (SoBRA) has published two new documents from the Non Aqueous Phase Liquid (NAPL) Subgroup. NAPL Document 6 - Advice Towards Understanding the Potential for LNAPL...
  18. Assessing risks to controlled waters in relation to climate change: SoBRA publishes updated guidance

    Assessing risks to controlled waters in relation to climate change: SoBRA publishes updated guidance

     March 2026
    The Society of Brownfield Risk Assessment (SoBRA) has updated its 2022 document, Guidance on assessing risk to controlled waters from land contamination under conditions of future climate change, to align...
  19. GWSDAT v.3.3 released

    GWSDAT v.3.3 released

     March 2026
    The GroundWater Spatiotemporal Data Analysis Tool (GWSDAT) has been updated and v3.3 has been released. GWSDAT is an open source, user friendly software application for the visualisation and interpretation of...
  20. JRC supports recently published European soil monitoring law

    JRC supports recently published European soil monitoring law

     March 2026
    The Joint Research Centre (JRC) is the science and knowledge service of the European Commission. The JRC has recently published a report on existing international and European standards relating...
  21. BSI publishes draft standard on ecological risk assessment of soil contamination (TRIAD approach) for comment

    BSI publishes draft standard on ecological risk assessment of soil contamination (TRIAD approach) for comment

     February 2026
    British Standards Institution (BSI) has published the draft International Standard Procedure for site-specific ecological risk assessment of soil contamination (soil quality TRIAD approach). Comments on the draft should be submitted...