Ground Gas Monitoring Services

When undertaking a construction or development project, understanding the ground conditions is critical, especially for new or existing developments located near former/active landfill sites, areas of made ground, organic clays, peat deposits, or specific geological terrains. Whether you’re redeveloping brownfield land, working near landfill sites, or planning infrastructure projects, our monitoring solutions provide all the data you need to meet UK regulatory standards, and avoid costly delays.  

Comprehensive Ground Gas Monitoring Solutions 

At Earth Environmental, we provide specialist ground gas monitoring services to identify, measure and assess the presence of hazardous gases such as methane, carbon dioxide, and hydrogen sulphide in the subsurface with the use of advanced gas monitoring equipment and techniques. We recommend spot monitoring for sites with potential ground gas risks. This allows us to gather essential data on gas concentrations and site conditions to inform your development plans. 

Our ground gas monitoring services include: 

Our experienced environmental consultants provide a full suite of ground gas investigation and monitoring services, including: 

• Installation of gas monitoring equipment using our in-house drilling services. 
• Infrared analysers for accurate ground gas concentration readings. 
• Purge recovery testing and total organic compound testing for comprehensive data collection. 
• In-situ Gas Clams for more detailed datasets and to obtain a more complete dataset or to validate removal of pathways or sources. 
• Total organic compound (TOC) testing, of the soil matrix to put together lines of evidence for classification of the site in accordance with CIRIA C659. 

We develop tailored strategies based on the assessment of ground conditions, ground gas regime, and hydrogeology, and the data available, ensuring the most effective approach for your site. By combining multiple gas monitoring techniques, we provide evidence-based site assessments that support safe development and compliance with UK regulations.  

Need expert ground gas monitoring? Contact us today for a tailored assessment. 

Our Expertise in Ground Gas Risk Assessment 

With years of experience in environmental gas monitoring, Earth Environmental has developed ground gas migration models, and pioneered the precursor to the Gassim model (and its algorithms) to assess risk posed to properties near to active ten landfill sites.  

At Earth Environmental, our experienced team has played a key role in shaping industry best practices for ground gas investigation and assessment. Our specialists have contributed to the development of UK guidance on ground gas risk evaluation and have pioneered the use of quantitative risk assessment (QRA) modelling. 

Unlike many practitioners who rely on generic standards (such as Building Regulations threshold values), we take a more advanced approach, using data-driven risk modelling to provide precise, site-specific insights. This ensures your development meets regulatory requirements while minimising unnecessary mitigation costs. 

We also collaborate with regulatory bodies, such as the Environment Agency and local Contaminated Land Officers, to ensure your project meets all necessary standards for site investigations, remediation strategies, and planning condition discharge.