Ground Gas Speakers


The Environmental Protection Group (EPG)

John is an Associate at EPG Ltd specialising in vapour intrusion and ground gas risk assessment, with over 20 years contaminated land consultancy experience combined with 9 years organic chemistry research experience. He is accredited with SOBRA for vapour intrusion and registered for permanent gases, human health and controlled waters and is currently a member of the SOBRA sub-group for the development of soil vapour GAC. John was active in both the steering group for the development of CIRIA C682:2007 The VOCs Handbook and the committee for BS 10176:2020 Taking soil samples for determination of volatile organic compounds (VOCs).  John presented at Ground Gas 2019 on Soil Vapour Intrusion: Latest Trends & Practices.



Vice President, Vapor Pin Enterprises

Director of Sales & Marketing, Cox-Colvin & Associates

Laurie Chilcote is an owner, Managing Director and Vice President of Vapor Pin Enterprises, Inc. and Vapor Pin Brazil, where she provides managerial and technical oversight on all marketing and sales for the Vapor Pin® both within the USA and Internationally.

Ms. Chilcote is also responsible for website development, webinar training, product development, distributor management, and most importantly, customer relations. At Cox-Colvin, Ms. Chilcote is responsible for management and presentation of analytical data including the transfer of electronic analytical results from various resources. In addition, she manages the firm’s accounting and operational functions.

Ms. Chilcote began her environmental consulting career in 1987 with Geraghty & Miller, Inc, where she became the firm’s Regional Business Development Manager. Cox-Colvin & Associates, Inc., founded in 1995, provides environmental consulting services to public and private sector clients throughout the United States. Vapor Pin Enterprises, founded in 2017, develops ands and provides sub-slab soil gas assessment tools used by environmental consultants, field services companies, drillers and radon professionals worldwide.



Senior Environmental Consultant, Atkins

Simon Dunstan is a Chartered (CSci) Senior Environmental Consultant with ten years’ experience in contaminated land risk assessment, remediation and waste assessments for public and private sector clients in the UK and Australia. He sits on the Atkins Human Health Technical Network and is a risk assessor and project manager for the National Grid Land Regeneration Framework. His Radiocarbon dating project was recognised with a ‘highly commended’ award at the Brownfield Awards 2020 under the ‘Best Scientific/Technical/Digital Advance’ category.



Project Director, CL:AIRE

Nicola Harries is a chartered geologist and chartered scientist and has over 25 years’ experience within the environmental industry. She is a project director at CL:AIRE and has responsibility for managing a number of projects and initiatives, the most recent of these is the Gas Protection Verification Accreditation Scheme, launched in January 2021. Nicola co-ordinates the National Brownfield Forum (industry / government / regulator forum), the National Quality Mark Scheme for Land Contamination Management Steering Group, the Sustainable Remediation Forum UK (SuRF-UK) and SuRF - International.



 Director - Geosciences, RSK and SiLC PTP Deputy Chair

Dr. Tom Henman has over 20 years’ experience of contaminated land assessment and remediation, gained in both consultancy and for a problem-holder. He is a Director based in RSK’s Glasgow office and is also responsible for leading technical quality within RSK’s 200- strong Geosciences business. Tom is a Chartered Chemist and a Chartered Scientist. He is also a registered Specialist in Land Condition (SiLC), a Suitably Qualified and experienced Person (SQP) under the National Quality Mark Scheme (NQMS) and a SiLC assessor. He is currently Deputy Chair of the SiLC Professional & Technical Panel (PTP) championing technical standards in land contamination assessment. He has a keen interest in developing and promoting technical excellence and has been actively involved in industry initiatives led by AGS, CIRIA and CL:AIRE furthering the development of industry standards. He was recently part of a team delivering a research project for the Scottish Government on assessing and managing risks to development from mine gas as well as a co-author of good practice guidance in this area. He has represented the environmental consultancy sector on the Scottish Government Contaminated Land Advisory Group. Tom has collaborated with a number of universities, including the University of Strathclyde and the University of West of Scotland amongst others, on innovative research projects, co-authoring research papers. His work has been recognised in the Brownfield Awards including the Buchanan St. Ambrose schools independent enquiry (Best Public Engagement and Participation, Brownfield Awards 2020).



Technical Director, Juta UK

Patrick has over 15 years research, design and practical experience in geotechnical engineering related to many fields of civil engineering construction including the investigation, design and construction of a wide variety of projects incorporating geosynthetic solutions. During his early career Patrick worked on the design and construction of Landfill and waste processing sites, Brownfield remediation and development and sub-structure design across Europe. Having a specialist knowledge area in geosynthetics, Patrick moved into Technical Sales and support for the European Geosynthetic manufacturers, and has since been involved in many unique projects across the globe; including remediation of old unpermitted landfill sites in Lithuania, Gold Mine design to optimise mineral recovery in Turkey, and large scale Civil remediation projects throughout Africa, the Middle East, Australasia and North America. Patrick presents lectures to professional groups around the UK on the geotechnical aspects of inclusion of geosynthetics into design, and the sustainable appropriate use of geosynthetics.

As a member of a number of UK trade associations and technical committees, Patrick continues to promote the use of geosynthetics across a broad spectrum including working closely with the Environment Agency for containment engineering related to Fracking, and hydrocarbon containment. Throughout his career Patrick has sat on numerous working groups for British and European standards development with particular focus on ground gas and waterproofing protection to structures incorporating geosynthetics.



Geoenvironmental Engineer, LEAP Environmental

Melanie Lipsham is a Geoenvironmental Engineer at Leap Environmental Ltd where she has been since joining as a graduate from Cardiff University with a degree in Earth Sciences (Environmental Geoscience) in 2015.


She has worked on a large variety of different brownfield developments projects with LEAP including landfills, petrol stations, gas works and printers, as well as working alongside Local Authorities on Part 2A projects and assisting with their contaminated land strategies.

Melanie has experience in contaminated land site investigation and human health, land gas and controlled waters risk assessments, with particular experience in remediation and validation monitoring and reporting.



Technical Director, BuroHappold

Hugh is a Chartered Geologist and registered SiLC with over 40 years professional experience including 25 years on contaminated land. He spent the first ten years carrying out geological and geotechnical investigations and assessments followed by four years advising on minerals planning at the DoE. He has provided expert witness evidence, written best practice guidance, delivered training and is a guest lecturer at several Universities. He is currently chair of the AGS Loss Prevention Group and am a member of the SiLC PTP.



Senior Environmental Engineer, Atkins

Bala is a senior Environmental Engineer with over 15 years’ experience in hydrogeology, contaminated land / water and geo-environmental engineering, particularly in numerical modelling of two-phase (gas and liquid) contaminant transport through complicated geological formations and landfills. He has also worked on ground gas and controlled waters detailed risk assessments. His other experiences include designing ground gas/ VOC protection measures and ground gas/VOC monitoring.



Technical Director, The Environmental Protection Group Ltd (EPG)

Steve is a Chartered Engineer and Environmentalist with 30 years professional experience of geotechnical and environmental engineering. Steve has helped to shape much of the UK guidance on ground gas assessment and remediation.  He is widely recognised as a leading expert in ground gas and provides advice and designs for remediation schemes on sites around the world.  He has successfully applied quantitative risk assessment to ground gas for both development and Part IIA sites over 20 years.  He is co-author of the Local Authority Guide to Ground Gas and was a member of the drafting committee for British Standard BS8576 on ground gas investigation.  He was also a member of the research team for a recently completed CIRIA project on the verification and integrity testing of gas protection systems.

Steve also presents training courses on ground gas for the Chartered Institution of Environmental Health and CIRIA.