Environmental Investigations, Remediation and Material Classifications
Environmental Solutions You Can Stand Behind
At Benchmark Geotechnical, we deliver practical, compliance-driven environmental engineering that supports confident decisions and reliable project outcomes. From PSI and DSI investigations to material classification, RAPs and validation — we focus on solutions that work on site, not just on paper.
Fast. Practical. Reliable. Always on your team.
We are the Benchmark.
Engineering Confidence. Elevating Environmental Standards.
At Benchmark Geotechnical, we don’t just assess environmental risk — we strengthen your organisation and project’s reputation for compliance, accountability, and delivery without compromising programme or productivity.
We provide end-to-end Environmental Engineering services — from preliminary and detailed site investigations to waste classification, remediation support and validation — ensuring every stage aligns with regulatory requirements, EPA guidelines, and project-specific approvals.
Our team partners with you through each phase of your project and the environmental services we provide, offering clear advice that supports informed decisions on site and with clients and regulators.
With practical solutions, rapid response, and an always-on-your-team mindset, we help you manage environmental risk with confidence — delivering outcomes that not only meet approval conditions, but set new benchmarks for professionalism and reliability.
End-to-End Environmental Engineering Solutions
At Benchmark Geotechnical, we deliver a full-spectrum, start-to-finish approach to Environmental Engineering — designed to manage environmental risk, meet regulatory requirements, and strengthen the credibility of every project we support.
Our services are built around practical outcomes, clear compliance pathways, and solutions that work on site as well as on paper.
Investigations & Environmental Assessments
- PSI / DSI Contamination Assessments – Desktop reviews, site history analysis, data gap identification, Site investigations aligned with regulatory guidance.
- Soil & Groundwater Sampling – Test Suites to ensure reliable and accurate results.
- Risk Assessment & Management Advice – Clear recommendations to support informed decisions on contamination management and remediation pathways.
Material Classification
- Soil and Waste Sampling for Classification – Assessment and classification in accordance with EPA and facility acceptance criteria – VENM, ENM GSW Waste classification reports
Remediation Action Plans (RAP) & Validation
- Remedial options, volumes, controls & ITPs
- Validation sampling, lab analysis & close-out reports
Acid Sulfate Soils (ASS / PASS) & ESC
- ASS / PASS Screening & Management Measures – Identification, risk assessment, and management strategies for compliant site works.
Due Diligence & Transaction Support
- Pre-Purchase Environmental Risk Screens – High-level assessments to inform acquisition decisions and project feasibility.
Delivering Confidence Through Environmental Compliance
Our focus is to ensure every project meets — and exceeds — environmental, regulatory, and stakeholder expectations.
With fast response times, practical advice, and an always-on-your-team mindset, Benchmark helps you manage environmental risk with confidence — protecting approvals, reputations, and project outcomes.
Process
Define outcomes
– regulatory/stakeholder expectations
Investigate
– targeted, defensible sampling & QA/QC
Assess
– risk screening to drive decisions
Manage
– practical controls with ITP’s
Monitor
– evidence of compliance
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Frequently Asked Questions
We provide NSW EPA–aligned environmental engineering services including PSI and DSI contamination assessments, soil and groundwater sampling, waste classification, RAPs, validation reporting, ASS/PASS assessments, erosion and sediment control, and environmental due diligence across New South Wales.
A PSI is an assessment of a site history and available data used to identify potential contamination risks and determine whether a DSI is required.
A DSI is required when potential contamination or data gaps are identified under NSW EPA guidelines. It involves intrusive soil and groundwater sampling to assess contamination risks.
Yes. We carry out NSW EPA–aligned or project scope specific soil and groundwater sampling
Material classification in NSW determines how soil or material can be reused or disposed of in accordance with NSW EPA and licensed facility requirements, helping avoid delays and compliance issues.
Yes. We prepare waste classification documentation and liaise with NSW EPA-licensed facilities and regulators to support compliant transport and disposal pathways.
A RAP outlines how contamination will be managed or remediated in accordance with NSW EPA guidance, including treatment options, volumes, controls, and inspection and testing requirements.
Validation confirms remediation objectives have been met under NSW EPA criteria through targeted sampling, laboratory testing, and reporting to support regulatory sign-off.
Yes. We provide NSW-specific ASS and PASS screening, risk assessment, and management recommendations to support compliant excavation and construction works.
Environmental due diligence identifies contamination risks and liabilities under NSW EPA requirements through pre-purchase risk screens, vendor reports, and compliance gap reviews.
We support NSW developers, builders, contractors, engineers, planners and property owners, across approvals, construction, and property transactions.
We deliver practical, NSW EPA–compliant environmental advice that protects approvals, project timelines, and reputations.
Early engagement helps identify compliance risks upfront, reducing approval delays and construction disruptions.