Geotechnical, Environmental & CMT Services in Sydney
Sydney-wide geotechnical investigations, environmental assessments, and CMT. Fast mobilisations, standards-aligned reporting and practical advice.
Need reliable site data and clear, compliant reporting in Greater Sydney? Benchmark Geotechnical delivers geotechnical investigations, environmental assessments, and construction materials testing (CMT) aligned with Australian Standards. We support consultants, builders, and contractors from feasibility through handover with fast mobilisations, traceable QA/QC, and decision-ready recommendations for DA/CC approvals and construction control.
Services in Sydney
Geotechnical Engineering
- Site investigations (AS 1726): boreholes, test pits, DCP/CPT
- Soil/rock logging, groundwater monitoring, instrumentation
- AS 2870 residential site classification
- Bearing capacity, settlement, slope stability, pavement/subgrade
- Factual & interpretive geotechnical reports with risk register
Environmental Engineering
- PSI/DSI investigations, soil/GW/vapour sampling & QA/QC
- Waste classification & disposal pathways
- RAP & validation reporting, CEMP/OCEMP for construction
- ASS/PASS screening; erosion & sediment control guidance
Construction Materials & Testing (CMT)
- In-situ density/compaction (nuclear/SSD), Level 1 coordination
- Concrete sampling, slump, compressive strength (AS 1012)
- Asphalt coring/mix testing; aggregates compliance (AS 1289)
- Lot conformance packs and traceable chain-of-custody
Recent Scopes & Deliverables
Commercial DA/CC – Western Sydney
- 8 boreholes + 4 test pits, standpipes, AS 1289 testing → Deliverable: interpretive report with footing design parameters, settlement estimates, and earthworks spec.
Subdivision earthworks – Hills District
- test pits + DCP grid, reactivity screening, Level 1 supervision plan → Deliverable: AS 2870 site classes, conformance triggers, compaction plan.
Road rehab – South West
- CBR/plate load + deflection & subgrade assessment → Deliverable: pavement design inputs and remediation options.
Sydney Coverage Areas
CBD, Barangaroo, Parramatta, Blacktown, Liverpool, Campbelltown, Penrith, Western Sydney, Northern Beaches, Hills District, Ryde, Macquarie Park, South West, Inner West, Sutherland Shire, Eastern Suburbs.
Process & Quality
Scope
objectives, drawings, approvals, safety/access
Mobilise
crews and calibrated equipment scheduled to program
Investigate
representative sampling and standards-aligned methods
Report
concise findings, compliance status, next steps
Support
clarifications, construction verification, close-out packs
Sectors we support
- Civil & Infrastructure: roads, bridges, utilities, subdivisions
- Buildings: residential, commercial, industrial
- Resources & Quarries: materials compliance & pavement design inputs
- Local Government & Education: compliance, remediation, and asset upgrades
- Developers & Consultants: due diligence, feasibility, and approvals support
Why Benchmark
- Practical recommendations—not just data dumps
- Standards alignment (AS 1726/2870/1289/1012)
- Transparent QA/QC
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Frequently Asked Questions
Yes—by arrangement. Share your window and traffic control constraints.
Combined scopes reduce mobilisations and speed decisions.
Commonly AS 1726, AS 2870, AS 1289, AS 1012, plus local authority requirements.
See Our Expertise in Action
Our project portfolio demonstrates the trust clients place in us to deliver results.
We Follow Best Practices
At Benchmark Geotechnical, our work is guided by industry standards and proven methodologies. We combine technical expertise with innovation to ensure safe, reliable, and sustainable outcomes for every project.
- Sustainability – Lasting positive impact
- On Time – Reliable project delivery
- Modern Tech – Accurate test results
- Smart Design – Practical, safe builds