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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Guidance on the Assessment and Monitoring of Natural Attenuation of Contaminants in Groundwater
In April 2024, CL:AIRE published Guidance on the Assessment and Monitoring of Natural Attenuation of Contaminants in Groundwater.
Monitored natural attenuation (MNA) can be a sustainable risk management strategy for a wide range of groundwater contaminants, where environmental data are collected and assessed that demonstrate natural attenuation will protect receptors from pollution or harm. Natural attenuation refers to the combination of physical, chemical and biological processes that act, without human intervention, to reduce contaminant concentrations, flux or toxicity.
The Environment Agency originally published technical guidance for MNA in 2000 in its R&D Publication 95. Since then, significant scientific advances have been made in understanding contaminant behaviour and reactive transport in the subsurface, alongside ongoing developments in site characterisation, monitoring and predictive modelling approaches and technologies, that are captured in this updated guidance.
CL:AIRE would like to gratefully acknowledge the Environment Agency for its seed funding for this project and the individuals of the working group for their time in authoring sections along with their technical discussions and review of the guidance. The final document has kindly been reviewed and supported by the Environment Agency, Natural Resources Wales, Scottish Environment Protection Agency and the Northern Ireland Environment Agency (NIEA), an agency within the Department of Agriculture, Environment and Rural Affairs (DAERA). CL:AIRE would also like to thank its Technology and Research Group for their peer review of the document prior to publication.
Working Group
George Flower – Arcadis
Thomas Grosjean – BP
Nicola Harries – CL:AIRE
Kirsten Johnstone – Environment Agency
Ian Jones – Natural Resources Wales
Matt Llewhellin – Natural Resources Wales
Brian McVeigh – formerly Northern Ireland Environment Agency
James Rayner – Geosyntec
Matt Riding – WSP
Isla Smail – Scottish Environment Protection Agency
Jonathan Smith – Shell
Rob Sweeney – CL:AIRE
Alan Thomas – ERM
Russell Thomas – WSP
Gary Wealthall – Geosyntec (retired)
The MNA guidance document can be downloaded for free at www.claire.co.uk/mna (PDF 9MB).
Concawe publishes sustainable remediation report and ten case studies
Concawe has published a new report called Case Studies and Analysis of Sustainable Remediation Techniques and Technologies.
The report aims to fill in a recognised gap in the provision of detailed case studies documenting the practical implementation of sustainable remediation, and facilitate further refinement of guidance.
Industry views wanted on piling on land affected by contamination
CL:AIRE is pleased to be collaborating with The Environmental Protection Group Ltd and a cross-industry Technical Working Group, to update the Environment Agency guidance "Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination". To help set the scope of this update, CL:AIRE is seeking feedback from industry around what works well about the current document and what needs to be improved. If you are familiar with the current guidance and undertake, review, or procure foundation works risk assessments, then we want to hear from you!
Please click the following link for more information and to access the piling questionnaire https://forms.office.com/e/XKt0fxAkXk. We would like your comments by the end of 16 June 2023.
Student Contest in ICEM 2023 - International Conference on Environmental Remediation and Radioactive Waste Management
The International Atomic Energy Agency (IAEA) is supporting the ICEM 2023 International Conference on Environmental Remediation and Radioactive Waste Management to be held at the International Conference Centre Stuttgart, Germany, 3-6 October 2023.
The American Society for Mechanical Engineers (ASME) and the IAEA are committed to stimulate and broaden the perspectives of students in areas related to nuclear energy. Therefore, ASME, in support with IAEA are excited to bring a student competition to ICEM 2023.
New CL:AIRE Publication: Guidance on applying statistics to land contamination decision-making
CL:AIRE is pleased to announce that "Professional Guidance: Comparing Soil Contamination Data with a Critical Concentration" has been published and is now available to download for free from the CL:AIRE website.
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Environment Agency publishes an update to LCRM guidance
The Environment Agency is pleased to announce that Scottish Government and the Scottish Environment Protection Agency are now adopting Land contamination risk management (LCRM) making it UK-wide guidance.June 2025 -
CL:AIRE is looking forward to seeing you at AquaConSoil
For those of you heading to AquaConSoil from June 16-20, we'd like to draw your attention to several sessions involving CL:AIRE and hope to see some of you in Liège.May 2025 -
Have your say in the 2025 National Environmental Services Survey
You’re invited to contribute your opinions and insights to the 2025 National Environmental Services Survey.May 2025 -
Defra consults on improving the implementation of biodiversity net gain for minor, medium and brownfield development
Department for Environment, Food & Rural Affairs (Defra) is seeking views on improving the implementation of biodiversity net gain (BNG) for minor, medium and brownfield development. Further information isMay 2025 Defra consults on biodiversity net gain for nationally significant infrastructure projects
Department for Environment, Food & Rural Affairs (Defra) is seeking views on the implementation of biodiversity net gain (BNG) for nationally significant infrastructure projects (NSIPs). The government is introducing BNG...May 2025
MHCLG announces simpler rules for smaller housebuilders
Ministry of Housing, Communities and Local Government (MHCLG) has announced simpler and more streamlined planning for smaller housebuilders. Further information is available here.May 2025
Sustainathon 2025 launches a call for speakers
Sustainathon 2025 has now been launched. This is a 17 hour global marathon dedicated to the Sustainable Development Goals (SDGs). This year, Sustainathon 2025 will dedicate an hour to each SDG.May 2025
National Brownfield Forum April meeting notes published
The National Brownfield Forum April 2025 meeting notes have now been published and are available to download here: April 2025 Meeting Notes Please share the link to the...May 2025 Government launches consultation on reforming landfill tax
The government has published a consultation on reform of Landfill Tax. The consultation seeks views on proposals aimed at supporting the government's ambition to transition to a more circular economy,...May 2025
Next GPVS application window opens 1 June 2025
April 2025The 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...
Contamination and Land Remediation Expo (CLR Expo) 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...April 2025
BSI proposes to revise guidance on investigations for ground gas (BS8576)
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...April 2025
EAC launches new inquiry to address the risks of PFAS within the UK's regulatory approach
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.April 2025
EU Council reaches agreement on soil monitoring law
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...April 2025 UK and Welsh Governments launch joint consultation to reform environmental permitting regulations
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...April 2025 Independent review of Defra's regulatory landscape published
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...April 2025 Environment Agency publishes guidance on how to get environmental permitting support for major projects
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 isApril 2025 Piling and Penetrative Ground Improvement Methods on Land Affected by Contamination: Guidance on Pollution Prevention
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)March 2025
CL:AIRE rolling out new membership process for new and renewing members
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...March 2025
Launch of Earthbanks project
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...March 2025 CL:AIRE publishes DoW CoP 2024 Auditing Summary Report
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...March 2025