Landfill Gas Risk Assessment Melbourne and Geelong
As waste decomposes within a landfill, it generates landfill gas and leachate through natural biological and chemical breakdown processes. While engineered containment systems are designed to manage these emissions, gas and liquid migration beyond landfill boundaries remains a real risk. Terralis Environmental Consultants provide expert landfill gas risk assessments across Melbourne, Geelong, and Victoria — helping developers, councils, and landowners understand and manage these risks before they become costly problems.
Why is a Landfill Gas Risk Assessment required?
For property owners, prospective buyers, developers, and construction professionals across Melbourne, Geelong, and regional Victoria, understanding the implications of landfill buffer zones is essential. Developments located near former landfills may be subject to additional planning requirements due to the risk of subsurface gas migration, with methane and carbon dioxide capable of accumulating in enclosed structures and posing serious fire, explosion, and health risks. Regulatory authorities, including local councils and EPA Victoria, may require environmental assessments, gas mitigation measures, or design modifications before granting planning approval. Identifying these risks early can prevent compliance issues, avoid safety incidents, and reduce delays or unforeseen costs during project delivery.
Under EPA Victoria’s Best Practice Environmental Management guidelines for landfills (Landfill BPEM), all buildings and structures within 500 metres of a closed municipal landfill are considered to fall within the recommended buffer zone. In Melbourne and Geelong — where former landfill sites are often located within or adjacent to growth corridors and established suburbs — development within this zone is subject to careful scrutiny and may require a formal Landfill Gas Risk Assessment.
Environmental & Health Risks
Landfill gas, particularly methane and carbon dioxide, can migrate through soil and accumulate in buildings, creating fire, explosion, or health hazards for nearby residents and workers.
Regulatory Non-Compliance
Landfill gas risk assessments are mandated for developments within buffer zones of former landfills. Non-compliance can lead to planning delays, permit rejections, or enforcement actions under environmental protection legislation.
Financial and Liability Risks
Failure to assess or manage landfill gas can result in costly retrofitting, remediation expenses, and legal liability—potentially affecting development approvals, resale value, and project feasibility.
Assessing and managing landfill gas risks is a critical and responsible step for landowners, developers, and businesses undertaking new developments or land use changes near former landfill sites.
Safety First – Lessons from Real Incidents
For Landfill Gas Risk Assesssment (LFGRA)
Landfill gas migration is not without risk. A real-world incident in Cranbourne, Victoria, investigated by the Victorian Ombudsman, highlights the critical importance of undertaking thorough Landfill Gas Risk Assessments (LFGRAs). In this case, residential properties were developed within close proximity to a closed landfill without adequate gas risk evaluation. Methane levels were later detected at dangerous concentrations, posing a serious risk of explosion. While no injuries occurred, the incident underscores the potential dangers when proper assessment and planning are overlooked.
At Terralis, we use this and other real-world examples to inform our safety-first approach and ensure every LFGRA is conducted with precision, regulatory compliance, and community safety in mind.
Our Comprehensive LandFill Gas Risk Assessment Services
Terralis offers a comprehensive range of services across Melbourne, Geelong and Rural Victoria to support safe, compliant, and effective Landfill Gas Risk Assessments (LFGRAs). Our services include:
Landfill Buffer Screening
We assess whether a site falls within a landfill buffer zone and determine the need for landfill gas risk assessment in accordance with EPA and planning guidelines.
Preliminary Site Investigation (PSI)
We undertake background reviews, site inspections, and soil gas screening to evaluate the potential for landfill gas migration before development proceeds.
Soil Gas Monitoring
We install and monitor soil gas bores to collect data on landfill gas concentrations (methane, carbon dioxide, oxygen), helping to assess potential risks to health and property.
Risk Assessment & Modelling
Our specialists evaluate gas migration pathways, building vulnerabilities, and gas concentrations to model risk levels and inform mitigation decisions.
Gas Mitigation Design
Where required, we design and specify gas barriers, venting systems, and sub-floor ventilation to safely manage and control landfill gas migration on development sites.
Regulatory Reporting & Planning Support
We prepare detailed reports and technical documentation to support planning applications, ensuring compliance with EPA Victoria, Council, and planning scheme requirements.
Tailored Solutions for Every Site
Commitment to Safety and Compliance
Terralis prioritises the highest levels of occupational and environmental safety in all landfill gas risk assessment works. Our approach aligns with state and federal regulatory frameworks, ensuring full compliance with EPA Victoria’s Best Practice Environmental Management (Landfill BEPM) guidelines, the NEPM (Assessment of Site Contamination), and relevant Australian Standards, including AS 4482.1 and AS/NZS 3580.10.1. We stay up to date with legislative changes to ensure that all assessments reflect current best practice. Our team is licensed, qualified, and experienced in conducting LFGRAs that are robust, defensible, and tailored to support safe development within or near landfill buffer zones.
