Contact Us

Ground gas risk: Providing independent assurance for developments

Published on February 24, 2021

When constructing new developments, local planning authorities, warranty providers and future house purchasers need independent assurance that the development is safe from any ground-gas risks. With a detailed knowledge of ground gas, gas protection measures and the construction process, RSK Geosciences has developed a range of independent services for integrity testing and gas protection system verification.

“As an independent gas-protection-system verifier, RSK Geosciences has a nationwide team of specially trained, experienced and competent geoenvironmental engineers to carry out our specialist services across the UK,” explains Chris Larkin, RSK Senior Geoenvironmental Engineer. “Clients, installers and regulators can call upon us for a wide range of independent gas protection system and gas membrane integrity testing verification services.”

Independent verification of gas protection systems is essential for regulators to sign off conditions relating to their sites and to ensure the protection of human health from potential ground gases that can cause intoxication, asphyxiation or explosions. It also avoids potential or perceived conflicts of interest with appointed membrane manufacturers, installers, designers and consultants.

“Here at RSK Geosciences we offer a full suite of services, from visual and mechanical inspection through to air-lance testing and dielectric testing,” explains Chris. “For low-gas-risk sites, where the installers are confirmed to be suitably competent, our engineers can carry out visual inspections to examine membrane integrity, service entrances, and corner and air brick detailing. This may need to be supported by a mechanical test, where we will look for unbonded seams and joins between sheets of membrane, or around service entrances, corner detailing and air brick detailing using a blunt pointed instrument.

“For higher-risk sites, air-lance testing and dielectric (electronic leak detection) tests may be recommended, which enable our engineers to rapidly test larger areas and quickly locate defects in membrane integrity,” says Chris. “Air-lance testing involves using an air compressor and bespoke wand to force 50 PSI of air pressure through a 4 mm nozzle along seams, joins and welds, while dielectric testing sends a high voltage direct current to the surface of the membrane via a phosphor-bronze brush. Even a pinhole triggers an alarm by earthing to the underside of the membrane.

Air-lance testing

Air-lance testing

Dielectric testing

Dielectric testing

“All our gas membrane verification services are carried out in accordance with CIRIA C735 guidance and are determined following a review of the site gas regime, installer competencies, materials used, the methodology of installation, and the wider construction process.”

For more information on RSK Geosciences’ gas protection and verification services please visit the webpage or contact Chris Larkin.

See more insights

ARTICLE AUTHOR

Chris Larkin

Senior Geoenvironmental Engineer, RSK Geosciences

More from this author

Chris is a senior geoenvironmental engineer for RSK Geosciences and has over 16 years of experience. He has a specialism in gas protection and gas membrane verification and is a gas protection consultant.

Contact this author

#RSKEvents

Join Dr Rossa Donovan, Technical Director at Nature Positive to discuss:

✔️ Network Rail’s sustainability journey
✔️ Challenges the British rail industry will face in the future
✔️ Moving to a circular economy
among other key topics!

Find out more and register in our story!

#sustainability #rail #railindustry #railway #construction #sustainable
...

📸 #selfiesonsite 🤳

Red sky in the morning Andrew Griffin from RSK Raw captured this beautiful sunrise over RSK Raw’s stores in Malvern, UK

Want to join our team? View our latest opportunities 👉 www.rskgroup.com/careers

#RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #sky #sunrise #nature #photography
...

#RSKEvents

📌 Join Helen McMillan, Associate Director and QRA Group Lead for RSK Geosciences, in a webinar which will provide an overview of how the effects of future #climatechange could be incorporated within the conceptual site model, along with the potential implications this may have on the assessment of risks to human health, controlled waters, and property receptors.

Find out more and register in our story!

#RSKGroup #RSKFamily #enviromental #sustainability #sustainablesolutions #construction #engineering #land #riskassessment
...

📸 #selfiesonsite 🤳

Hugh Neatherway from RSK Response on-site with the RSK Response tanker in Shoreham, UK, on a nice spring day!

Want to join our team? View our latest opportunities 👉 www.rskgroup.com/careers

#RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #construction #engineering #spring
...

𝗣𝗲𝗱𝗼𝗺𝗲𝘁𝗲𝗿 𝗖𝗵𝗮𝗹𝗹𝗲𝗻𝗴𝗲 𝟮𝟬𝟮𝟮: 𝗦𝘁𝗲𝗽𝗽𝗶𝗻𝗴 𝘁𝗼 𝘀𝘂𝗰𝗰𝗲𝘀𝘀 𝗶𝗻 𝘄𝗲𝗲𝗸 𝟮

🚶 Our week one results are in and our RSK Group step count has just passed 79,085,394 steps!

👏 Colleagues across the group share their progress and tips in our latest article in our story!

💚 Keep sharing your adventures on social media using the hashtag #RSKSteps

#RSKGroup #wellbeing #health #walking #pedometer #steps #nature #landscape
...

👷 Did you know that the UK #construction industry contributes around 40% of the country’s total #carbonfootprint?

📌 Sarah Cook, Chartered Geologist and Associate Director of RSK company Leap Environmental Ltd, presented Leap’s foundation carbon calculator in one of our latest webinars.

🏗️ This tool has been developed to consider embodied carbon associated with foundations and will enable developers to identify carbon costs and potential savings early in the #design process.

Find out all about our past and future events in our story!

#RSKEvents #RSKGroup #RSKfamily #sustainability #constructionindustry #building #carbonemissions #carboncalculator #co2
...

👏 Barcelona-based RSK company Amphos 21 is set to take part in one of the most extensive groundwater chemistry modelling projects that has ever been conducted.

🖥️ What does this exciting project entail? What is the ultimate goal? Find out all the details in our story!

#RSKGroup #RSKfamily #groundwater #supercomputer #sustainability #sustainable #enviromental #waterindustry
...

#selfiesonsite 🤳

Scott and Piotr ready to get started on steel fencing works for East West Railway Company!

📸 @lewisjimmy83

Want to join our team? View our latest opportunities 👉 www.rskgroup.com/careers

#RSKgroup #behindthescenes #meettheteam #RSKfamily #RSKonsite #construction #railway #careers
...

Copy link
Powered by Social Snap