The National Contaminated Land Officers Group (NCLOG) is holding a Ground Gas Forum on the 1st April. Be it anthropogenic or from natural sources, ground gas still remains one of the key factors in land contamination risk assessment. The ground gas forum will look at new screening tools for identifying potential risk, and discuss new guidance and how key stakeholders view the issue of ground gas risk.

View the agenda here.

This event is being held by the National Contaminated Land Officers Group (NCLOG) which joined the IES at the start of 2025. All Contaminated Land Officers can join NCLOG for free, if you would like to join please contact NCLOG Officer Ellie Savage (ellie@the-ies.org).

This event is open to all NCLOG members, as well as those working in an environmental regulator. 

Our speakers

Dr. Darren Beriro, Principal Geoscientist, British Geological Survey

Darren is an interdisciplinary geoscientist with a passion for risk based land management of land contamination. Darren is the current chair of the National Brownfield Forum. In his role at BGS, he has worked with a wide range of external organisations, including landowners, developers, consultants, and regulators to increase the impact of geoscience in brownfield land redevelopment projects. Darren's research and publications include: i) spatial decision support tools to evaluate land suitability for different applications (e.g. renewable energy, land redevelopment); ii) laboratory methods to measure the content and bioaccessibility of chemicals in soil that are harmful to human health; and iii) data driven modelling of soil and rock geochemistry.

Aliyssa Glen, Principal Consultant, WSP

Aliyssa is a Chartered Environmentalist with over 9 years’ experience working as a contaminated land consultant. She has particular interest in and experience of complex ground and mine gas risk assessments, and routinely mentors junior staff in related risk assessment, remediation and verification requirements. At WSP, she is sub-leader of the Ground Gas group and provides internal training on mine and ground gases, and she also sits on the SoBRA Ground Gas Subgroup.

Matt Lennard, Principal Geo-Environmental Engineer, NHBC 

Matt is a Chartered Geologist and ASoBRA accredited risk assessor (human health and vapour intrusion) with 25 years experience in the contaminated land industry where he has worked for consultants, contractors and land-owners before joining NHBC in 2016.

Amy Juden, Head of Geoenvironmental at The Environmental Protection Group Ltd

Amy is a Chartered Geologist and ground gas specialist. She has worked as a contaminated land consultant for brownfield redevelopment for over 12 years. Amy has undertaken complex assessments for coal mine gas ingress on many sites, routinely undertaking detailed quantitative modelling and employing bespoke monitoring techniques. She is author of 2023 NHBC guidance on hazardous ground gases, provides training for CL:AIRE on ground gas risk assessment, and for the Geological Society on methane and radon geohazards.

John Naylor Technical Director, Ground-Gas Solutions Ltd

John has over 20 years professional experience working within the contaminated land and landfill arenas for both the public and private sectors. He has worked to improve the contaminated land investigation, assessment, remediation and verification at both consultant and regulatory posts. A pioneer of continuous ground gas monitoring methodologies, John has helped to establish guidance in ground gas issues, working closely with professional bodies, consultants, local authorities and landowners. As well as developing verification and validation best practice and training. John is a Chartered Environmentalist and is an active member of several organisations including the British Verification Council and The Radon Council (current vice chair).  He has helped author and also been part of steering groups for several documents related to ground gas matters and regularly provides training to fellow professionals.

Neil Salvidge Training Manager, Training, Development & Assessment

Having originally trained as a carpenter and joiner, Neil moved to the geomembrane sector in the 1990s and in 2000 he joined PAGeoTechnical Ltd as an Installation Technician and trainer, promoting best practice through training. Neil gained Assessor status with CITB, as the initial assessor for NVQ Level 2 in gas membrane installation. He is involved with developing industry standards and has supported the development of NVQ Level 4 (now 3) Verification of Ground Gas protection systems. In 2018 Neil established his independent training company and remains passionate on the delivery of quality training.