Contaminated Land, Remediation & Auditing

Contaminated land, remediation and auditing

Resolving complex contamination with rigour and care

Contaminated land presents technical, regulatory, and commercial challenges that require careful assessment and informed decision‑making. Senversa brings significant depth of expertise and strong local knowledge to support clients across the full contaminated land lifecycle, from initial investigation through to remediation and long‑term management.

Our team is experienced in assessing complex sites with multiple contaminants, historical land uses, and sensitive receptors. We apply multidisciplinary skills across contaminated land, hydrogeology, risk assessment, and engineering to identify risks and define practical pathways forward. Our approach is evidence‑based and proportionate to site conditions and intended land use.

Senversa delivers a wide range of contaminated land services, including environmental site assessment, soil and groundwater investigation, remediation planning and implementation, underground tank management, soil hazard categorisation, and PFAS assessment and management. We select techniques that are technically robust and appropriate to site constraints, regulatory requirements, and cost considerations.

Key services

• Corporate environmental risk and liability management
• Property transaction due diligence
• Statutory environmental audits
• Groundwater investigation and management
• Landfill gas assessments
• Quantitative human health risk assessment
• Complex hydrogeological assessment and modelling
• Expert witness and legal support

• Baseline lease / purchase assessments
• Financial liability risk assessment
• Site risk ranking
• Multi-disciplinary land suitability assessments

• Soil, sediment, water, biota investigations
• Human health and ecological risk assessment
• Detailed PFAS assessments
• PFAS remedial strategies
• PFAS waste management
• Engineered containment facility design
• Community Consultation

• Planning, delivery & implementation of clean-up plans
• Environmental and construction management planning
• Remedial feasibility assessment
• Remedial systems design and procurement
• Monitoring and regulatory sign-off
• Design and verification of containment facilities
• In-situ treatment systems

• Tank removal and validation
• Multi-site tank management programs
• Site risk ranking and staged assessment

• Waste classification sampling
• Soil management strategies
• Fast turn-around assessments
• PFAS and asbestos waste management solutions

• Regulatory compliance advice
• Expert witness
• Environmental data management and GIS solutions
• Community engagement

Statutory auditing services

• Contaminated land audits
• Audits on risk of harm to the environment
• Landfill design verification and construction auditing
• Landfill operations and closed landfill audits
• Independent Environmental Auditing under NSW and VIC development approvals
• Verification of reports prepared under statutory notices 
• Verification of financial assurance assessments 
• Mandatory notifications
• Cleanup plan verification
• Enforceable undertaking verification
• Audit support and expert support services
• Port Safety & Environmental Management Plan Audits 

Assessments related to auditing

• Environmental assessments to support third party auditors
• Contaminated site investigations
• Remedial feasibility assessment and action plan
• Site remediation and environment management plans
• Independent / third party technical reviews
• Assessing implementation of audit conditions