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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. Next GPVS application window opens 1 June 2025

    Next GPVS application window opens 1 June 2025

     April 2025
    The next Gas Protection Verification Accreditation Scheme (GPVS) application window opens 1 June 2025 and closes 31 August 2025. The application window is open to Technician Grade and Specialist...
  2. Contamination and Land Remediation Expo (CLR Expo) 2025

    Contamination and Land Remediation Expo (CLR Expo) 2025

     April 2025
    The Contamination and Land Remediation Expo (CLR Expo) returns for 2025 (16-17 September, NEC, Birmingham) as the premier event for professionals across the geoenvironmental sectors. Whether you're a contractor, environmental...
  3. BSI proposes to revise guidance on investigations for ground gas (BS8576)

    BSI proposes to revise guidance on investigations for ground gas (BS8576)

     April 2025
    The British Standards Institution (BSI) proposes to revise BS8576 - Guidance on investigations for ground gas. Permanent gases and Volatile Organic Compounds (VOCs). A new work item proposal has been...
  4. EAC launches new inquiry to address the risks of PFAS within the UK's regulatory approach

    EAC launches new inquiry to address the risks of PFAS within the UK's regulatory approach

     April 2025
    The Environmental Audit Committee (EAC) has launched an inquiry looking at the risks of PFAS within the UK's regulatory approach. EAC requests written submissions by 5.00pm on 26 May 2025.
  5. EU Council reaches agreement on soil monitoring law

    EU Council reaches agreement on soil monitoring law

     April 2025
    The European Council has reached a provisional deal with the European Parliament on a directive establishing a framework for soil monitoring to improve resilience and manage the risks of contaminated...
  6. UK and Welsh Governments launch joint consultation to reform environmental permitting regulations

    UK and Welsh Governments launch joint consultation to reform environmental permitting regulations

     April 2025
    The UK and Welsh Governments have launched a joint consultation to reform Environmental Permitting Regulations 2016. The proposals relate to flood risk activities, waste operations, water discharge...
  7. Independent review of Defra's regulatory landscape published

    Independent review of Defra's regulatory landscape published

     April 2025
    The independent review carried out by Dan Corry on behalf of Department for Environment, Food & Rural Affairs (Defra), to review environmental regulations has been published. The review has identified major...
  8. Environment Agency publishes guidance on how to get environmental permitting support for major projects

    Environment Agency publishes guidance on how to get environmental permitting support for major projects

     April 2025
    The Environment Agency has published guidance on how to get extra support for projects in England that require a complex range of environmental permits and licences. Further information is
  9. Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination: Guidance on Pollution Prevention

    Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination: Guidance on Pollution Prevention

     March 2025
    In March 2025, CL:AIRE published a new guidance document Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination: Guidance on Pollution Prevention. Download the file here (23MB)
    CL:AIRE rolling out new membership process for new and renewing members

    CL:AIRE rolling out new membership process for new and renewing members

     March 2025
    Over the next few weeks, CL:AIRE will be rolling out a new membership process for new and renewing members. The process will improve how we capture the data about our...
  10. Launch of Earthbanks project

    Launch of Earthbanks project

     March 2025
    CL:AIRE is excited to formally announce the launch of its new research project, Earthbanks, spearheaded by eight of the top academics in soil in the UK. The Earthbanks project aims to...
  11. CL:AIRE publishes DoW CoP 2024 Auditing Summary Report

    CL:AIRE publishes DoW CoP 2024 Auditing Summary Report

     March 2025
    CL:AIRE continues performing the Definition of Waste Code of Practice (DoW CoP) audits following the procedures published on its website (DoW CoP Auditing Procedures). The audit activities...
  12. BSSS launches new soil podcast

    BSSS launches new soil podcast

     March 2025
    The British Society of Soil Science (BSSS) has launched a new podcast, Soil Matters, a platform dedicated to bridging the gap between cutting-edge scientific research and...
  13. CL:AIRE publishes new piling guidance

    CL:AIRE publishes new piling guidance

     March 2025
    CL:AIRE is delighted to announce the publication of a new guidance document Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination: Guidance on Pollution Prevention. This report presents guidance on...
  14. Government publishes policy paper on new approach to ensure regulation support growth

    Government publishes policy paper on new approach to ensure regulation support growth

     March 2025
    HM Treasury has recently published a policy paper titled New approach to ensure regulators and regulation support growth. This action plan sets out the next steps to enable a regulatory...
  15. AGS publishes guidance about managing pressurised gases during drilling

    AGS publishes guidance about managing pressurised gases during drilling

     March 2025
    The Association of Geotechnical and Geoenvironmental Specialists (AGS) has recently published guidance Managing pressurised gases during drilling. This guidance provided information to aid ground engineering specialists in the risk assessment process.
  16. CL:AIRE publishes TRG Annual Report 2024

    CL:AIRE publishes TRG Annual Report 2024

     February 2025
    CL:AIRE has now published the 2024 Technology and Research Group (TRG) Annual Report and it is available to download.
  17. New CL:AIRE TRG member

    New CL:AIRE TRG member

     February 2025
    CL:AIRE is delighted to announce that its Technology and Research Group (TRG) has a new member - Brian Reid, Professor of Soil Science at the University of East Anglia.
  18. EiCLaR project produces range of outputs on completion

    EiCLaR project produces range of outputs on completion

     February 2025
    EiCLaR (Enhanced and Innovative In Situ Biotechnologies for Contaminated Land Remediation) was a project funded by the EU and China. It ran from January 2021 until the end of 2024...
  19. Joint advice note published by Regulators on expectations for successful land quality management at nuclear licensed sites

    Joint advice note published by Regulators on expectations for successful land quality management at nuclear licensed sites

     February 2025
    A joint advice note has been published for the nuclear sector titled Regulatory expectations for successful land quality management at nuclear licensed sites. It was issued...
  20. UK Government delays mandatory digital waste tracking

    UK Government delays mandatory digital waste tracking

     February 2025
    The UK Government has announced the delay of digital waste tracking becoming mandatory in April 2025. It will now be introduced from April 2026. Read the updated policy paper