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Ground Gas 2022 - 600px - new date

Our annual Ground Gas conference is returning online on 4 October at 09:15-12:40 BST.

Brought to you by Environment Analyst’s Brownfield & Regeneration Network, this annual conference will provide new guidance and practical solutions for improved risk assessment, mitigation and protection verification of ground gas.

Don’t miss this go-to event for regulators, consultants, remediation contractors and other industry experts concerned with all aspects of ground gas risk assessment, verification, and protection.

Previous event attendees said...

"A great update on the current market'"

Delta Membrane Systems

"Highlighted significant issues in the industry"

ST Consult

"It was very thought provoking and informative"

Wardell Armstrong

“Updated and expanded my knowledge of the subject"

Geotechnical Consulting Group

Event agenda

09.15 Welcome from Environment Analyst

09.20 Opening Remarks from the Chair: 

Hugh Mallett, Technical Director, Buro Happold

09.25 Exploring the Current Application of Existing Ground Gas Guidance and Improved Approaches to Monitoring and Risk Assessment

A recent research project required an in-depth read of the NHBC ground gas guidance published in 2007.  Whilst looking to prepare guidance to help reduce bad practice it became clear that some aspects of ground gas risk assessment have not changed since the NHBC guidance was published. 

This presentation will look at lessons learnt in gas protection risk assessment and design over the past few years and give recommendations for improved approaches particularly with regards to gas concentrations in monitoring wells as a reliable indicator of the risk of surface emissions occurring.

Steve Wilson, Technical Director, Environmental Protection Group

09.50 Continuous Gas Monitoring – A Case History

Hugh Mallett, Technical Director, Buro Happold

10.10 Q&A

10.20 Case Study: The Interpretation of Landfill Gas Monitoring Results 

This is a short presentation concerning the interpretation of some quite variable gas monitoring results on a former landfill site with a clay capping, demonstrating the influence of groundwater movement.

Seamus Lefroy-Brooks, Principal, LBHGEO Ground Engineering

10.40 Q&A followed by a short comfort break

11.00 Panel Discussion: Improving the Quality of Gas Protection Installation & Verification 

  • Discussing the requirements of CIRIA C735 guidance document and the extent to which adequate competency can and should be demonstrated
    • the process of robustly demonstrating risk mitigation 
    • take-up of the new Gas Protection Verification Accreditation Scheme and other initiatives to improve verifiers’ qualification and competence 
  • Better understanding the implications of protection measures stated as “required” or “recommended”: the importance of early consideration of gas protection 
  • Effectively reviewing a protection design report to enable appropriate sign-off Strategies for improving industry acceptance of good practice


Dean Wigley, Group Engineering Manager, Persimmon Homes

Sarah Hamill, Contaminated Land Officer, West Dunbartonshire Council

Neil Salvidge, Independent Assessor, NS Training, Development & Assessment Ltd

Nicola Harries, Technical Director, CL:AIRE

11.45 Best Practice in Detailing & Designing Appropriate Gas Protection  

  • Understanding the regulatory and policy guidance and applying it to design specifications
    • including key criteria outlined in BS8485:2015+A1:2019 regarding the design and specification of suitable gas membranes
    • understanding the BS4845 points system and where / how it can be used
  • Effectively using the CSM and risk assessment to design the gas protection report
  • Assessing whether the points scoring system is appropriate - understanding the inter-relationship between risk assessment and protection design

Dominic Young, Specialist Contaminated Land Officer, Renfrewshire Council

12.10 Large-Scale Redevelopment of a Former Landfill: A Case Study in the Importance of Verification 

RSK has long been involved in the remediation of a former landfill site now comprising a residential housing development at Lodden Park, Reading. The project set new standards for landfill redevelopment winning the 2018 Brownfield Briefing Award for best re-use of materials for RSK, Vertase, and Taylor Wimpey UK and best verification / project close out of remediation for Vertase FLI. However, the work to secure safe development does not stop there.

As construction progressed, RSK oversaw the installation and verification of gas mitigation measures within the development including the undertaking of integrity testing. RSK also oversaw improvements to the installation process and undertook separate validation visits to provide further assurance as construction progressed to meet regulators and NHBC approval. 

The project provides a valuable case study to demonstrate the importance of working with installers to improve installation methods, preventing damage during development, and achieving effective validation of the entire gas protection system. 

Andrew Fellows, Principal Geo-Environmental Consultant, RSK Environment

12.30 Q&A

12.35 Closing Remarks from the Chair


Brownfield & Regeneration Network members receive 3 free event tickets per year to use towards our online conferences, including Ground Gas, plus they get discounts on online conference tickets.

Get involved and become a sponsor

Get exposure in front of a targeted audience of ground gas professionals and become a sponsor of Ground Gas 2022. To find out more contact Simon King on or call +44 (0) 1225 667 508.