Comprehensive Consulting Solutions
Contaminated Land Assessment & Site Investigation
GSNE provides comprehensive contaminated land assessment and site investigation services across Sydney and NSW. Our work supports planning approvals, regulatory requirements and strategic site redevelopment, helping clients identify, delineate and manage contamination risks in line with Council, State, NSW EPA and NEPM guidelines.
- Preliminary Site Investigation (PSI)
- Detailed Site Investigation (DSI)
- Remediation Action Plan (RAP)
- Remediation and Validation
- Long-Term Environmental Management Plan
- Soil, groundwater and vapour sampling with laboratory testing and interpretation
- Contamination source identification, delineation and risk assessment
- Planning approvals and regulatory requirements
- Strategic advice for site redevelopment and contamination management
Waste Classification & Soil Management
GSNE provides waste classification and soil management services in accordance with the NSW EPA Waste Classification Guidelines. We assess excavated soils for reuse, recycling or off-site disposal and prepare Waste Management Plans, VENM/ENM certifications and supporting documentation for construction and development projects.
- Waste classification in accordance with NSW EPA Waste Classification Guidelines
- Assessment of excavated soils for reuse, recycling, or off-site disposal
- VENM and ENM assessment and certification
- Waste Management Plans for construction and development projects
- Waste tracking, documentation and regulatory compliance support
Groundwater & Surface Water Assessment
GSNE delivers groundwater and surface water assessment services to support construction, development and environmental compliance. Our team provides hydrogeological investigations, monitoring programs and contaminant migration analysis to evaluate environmental risks and the impact of works on water resources.
- Hydrogeological investigations and groundwater monitoring programs
- Groundwater and surface water sampling and quality assessment
- Evaluation of contaminant migration and environmental risk pathways
- Assessment of construction and development impacts on water resources
Remediation & Site Management
GSNE provides remediation and site management services for contaminated and impacted sites across NSW. We prepare Remediation Action Plans, design and oversee remediation works, undertake validation sampling and prepare validation reports to support regulatory sign-off and long-term site management.
- Preparation of Remediation Action Plans (RAP) and remediation strategies
- Design and implementation of site remediation solutions
- Validation sampling and preparation of site validation reports
- Environmental monitoring and long-term site management planning
Hazardous Materials & Environmental Risks
GSNE provides hazardous materials and environmental risk services including asbestos, lead and other contaminant surveys, clearance inspections, air monitoring and environmental due diligence for property acquisition and redevelopment.
- Hazardous materials surveys including asbestos, lead and other contaminants
- Asbestos removal guidance and regulatory compliance advice
- Asbestos clearance inspections and clearance certificates
- Asbestos air monitoring
- Hazardous materials management and mitigation plans
- Environmental due diligence for property acquisition and redevelopment
Construction Environmental Monitoring & Support
GSNE provides construction environmental monitoring services to support builders and developers in meeting environmental and regulatory requirements. Our services include dust, noise, vibration, landfill methane and hazardous gas monitoring during construction.
- Construction dust, noise and vibration monitoring
- Landfill methane gas monitoring
- Hazardous gas monitoring
FEM Analysis, Impact Assessment & Specialist Engineering Assessment (SEA)
GSNE provides advanced finite element modelling (FEM), construction impact assessments and Specialist Engineering Assessment (SEA) reports for projects across Sydney and NSW. We use numerical modelling to predict soil–structure interaction, ground movement and the effects of excavations, shoring and foundations on adjacent assets, infrastructure and Sydney Water assets.
- Numerical modelling of soil–structure interaction
- Excavation, shoring and foundation impact assessment
- Ground movement, settlement and deformation prediction
- Tunnel, pipeline and buried asset impact studies
- Specialist Engineering Assessment (SEA) reports for Sydney Water
- Construction risk assessment and mitigation measures
- Monitoring and instrumentation recommendations
Slope Stability & Landslide Engineering
We assess natural and man-made slopes for stability, landslide risk and remediation requirements. Our services include slope inspection, engineering assessment, stability analysis and development of practical stabilisation measures such as drainage, buttressing and retaining systems.
- Limit equilibrium and numerical slope stability analysis
- Landslide risk assessment and risk management according to AGS
- Stabilisation design including soil nails, anchors, retaining walls and buttressing
- Drainage and seepage control measures for slope performance
- Construction and long-term stability assessment
- Monitoring, risk mitigation and remediation recommendations
Dewatering, Seepage & Groundwater
We provide seepage assessments, dewatering advice and groundwater-related risk review for excavations and below-ground structures. Our services help clients understand likely inflows, groundwater behaviour and potential impacts on adjacent properties, structures and assets.
- Dewatering Management Plan
- Seepage analysis
- Geohydrological assessment
- Dewatering impact assessment
- Hydraulic conductivity and inflow rate assessment
Shoring, Retaining & Foundation Design
GSNE provides geotechnical input and design support for piling, retaining walls, shoring systems and excavation support works. Our experience includes soldier piles, shotcrete walls, soil nailing, ground anchors, bracing systems and other practical solutions tailored to site constraints and ground conditions.
- Shoring and excavation support design for temporary and permanent works
- Retaining wall design for residential, commercial and infrastructure projects
- Foundation design for shallow and deep foundation systems
- Raft, footing, pile and micropile foundation solutions
- Temporary and permanent geotechnical design support
- Certification and technical support for authority and construction requirements
Geotechnical Site Investigations
We undertake geotechnical site investigations for residential, commercial, industrial and infrastructure projects across NSW. Our services include boreholes, test pits, field testing, laboratory testing coordination and interpretation of subsurface conditions to support safe, practical and economical design.
- Planning and delivery of geotechnical site investigations
- Boreholes, test pits and in-situ testing programmes
- Soil, rock and groundwater assessment
- Site classification and subsurface profiling
- Laboratory testing coordination and interpretation
- Geotechnical reporting for design, approval and construction stages
- Recommendations for excavation, earthworks and foundations
- Investigation support for residential, commercial, industrial and infrastructure projects
Temporary Works Geotechnical Engineering Services
We support builders and contractors with temporary works assessments during construction, including trench stability, temporary shoring, slope stability, bearing capacity and platform design. Our advice is focused on construction safety, compliance and buildability.
- Working platform design for cranes, piling rigs and heavy plant
- Bearing capacity and settlement assessment for temporary loads
- Temporary excavation and trench stability assessment
- Batter slope review and temporary retention advice
- Ground improvement and subgrade stabilisation recommendations
- Site inspections and construction-phase geotechnical support
- Platform certification and temporary works support documentation
- Temporary works risk management and certification support
Need a service we haven't listed?
Our team handles bespoke geotechnical and environmental briefs across NSW.