When do clients need a RAP rather than general remediation advice?

Clients usually need a RAP when a regulator, planning condition, auditor, counterparty or project governance process requires a documented remediation scope that can be reviewed, approved, tendered or validated. It is often the bridge between investigation findings and implementation.

What makes a RAP defensible?

A defensible RAP is proportionate to the conceptual site model, clear about remediation objectives, realistic about construction and waste pathways, explicit about validation criteria, and aligned with the regulator, auditor or project approval context rather than treating the site as a generic remediation exercise.

Remediation Action Plans (RAP) | iEnvironmental Australia

Common Instructions

These are the terms and instructions clients, councils and legal teams commonly use for this work in Australian practice.

Remediation Action Plan
RAP
Remediation action plans
RAP contaminated land

Reviewer

Reviewed by Michael Nicholls, Principal Environmental Scientist (CEnvP #0831, Site Contamination Specialist SC40037).

Last reviewed 22 April 2026.

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Primary Sources

These official references commonly inform the way this work is scoped, interpreted or defended.

What is a Remediation Action Plan (RAP) and when do you need one in Australia?

A Remediation Action Plan (RAP) is a site-specific technical document that sets out how contamination will be removed, treated or managed so a site meets its intended land use. RAPs are required under Schedule B1 and B2 of the ASC NEPM 2013 and state-based contaminated land legislation, most commonly when a Detailed Site Investigation (DSI) confirms contamination above the relevant assessment criteria for the proposed use.

By Michael Nicholls, Managing Director — iEnvironmental Australia. CEnvP Site Contamination Specialist.

When a Remediation Action Plan is Triggered

A RAP is not required for every site. Under Australian frameworks, a RAP is triggered once contamination has been confirmed by a DSI against:

Health Investigation Levels (HILs) or Health Screening Levels (HSLs) from ASC NEPM 2013 Schedule B1
Groundwater Investigation Levels (GILs) from Schedule B5
Ecological Investigation Levels (EILs) from Schedule B6 where terrestrial ecology is a receptor
State-specific criteria such as those referenced in the NSW Contaminated Land Management Act 1997, the Vic Environment Protection Act 2017 or the Qld Environmental Protection Act 1994

The most common commercial triggers in practice are: a regulator clean-up notice, a development application condition requiring remediation before occupation, a transaction where a purchaser or financier requires cleared contamination, or a lease exit where the tenant must restore the site to baseline.

What a Defensible RAP Contains

A RAP that will pass a Site Auditor, regulator or a sophisticated purchaser needs to do more than name a treatment option. It must:

Restate the Conceptual Site Model (CSM) from the DSI — sources, pathways, receptors, and the contaminants of concern (COCs)
Define the remediation objectives, derived from the proposed land use and the relevant HILs/GILs/EILs
Document remediation option evaluation — typically a multi-criteria analysis covering feasibility, cost, time, residual risk, and stakeholder impact
Describe the selected remediation approach in full: excavation, on-site treatment, off-site disposal, in-situ treatment, capping, monitored natural attenuation, or a combination
Set out validation sampling design — locations, frequency, laboratory methods, and quality assurance against the objectives
Include a waste classification strategy consistent with state frameworks (NSW EPA Waste Classification Guidelines, Vic EPA Waste Classification, Qld ERA 60)
Identify contingencies for unexpected finds, off-site migration, and regulatory escalation
Provide an Environmental Management Plan for the remediation works, tying in construction controls, dust, noise, odour and environmental monitoring

How a RAP Fits Into the Broader Contamination Workflow

A RAP rarely exists in isolation. In a typical Australian contaminated-land workflow it sits between investigation and validation:

PSI — desktop review, site history, preliminary risk screen
DSI — intrusive sampling, delineation, human health and ecological risk assessment
RAP — strategy and methodology document, this page
Remediation works — delivered under the RAP and an Environmental Management Plan
Validation and closure — sampling against the RAP’s objectives, reporting, and (where required) a Site Audit Statement

For properties on the NSW NSW EPA Contaminated Land Register (CLR) or Environmental Management Register (EMR in Qld), the RAP is also the document that anchors regulator negotiation and the path off the register.

State-by-State Regulatory Context

New South Wales

Under the NSW CLM Act, a RAP is required whenever a site is subject to an EPA Management Order or Voluntary Management Proposal, and is also the standard deliverable where a NSW EPA-accredited Site Auditor is engaged. The NSW EPA Consultants Reporting on Contaminated Land guide sets expectations for RAP structure and quality.

Victoria

Under the Vic EP Act 2017 and the General Environmental Duty (GED), any person causing or managing site contamination must take reasonably practicable steps to minimise risks of harm. RAPs are commonly prepared ahead of Environmental Audit (Statement of Environmental Audit) where the site involves a sensitive use, development trigger or EPA intervention.

Queensland

Under the Qld EP Act 1994, sites on the Environmental Management Register (EMR) or Contaminated Land Register (CLR) typically require a RAP before the Department of Environment and Science will consider removal or reclassification. Beneficial reuse pathways and waste tracking under the Qld Waste Reduction and Recycling Act are critical inputs to the plan.

South Australia

Under the SA EPA’s Site Contamination Policy, RAPs are prepared by a Site Contamination Consultant and reviewed against the NEPM framework. Adelaide Plains transaction sites frequently also require a Site Audit Report if the purchaser is a government entity or a sensitive-use developer.

Common Questions About Remediation Action Plans

How much does a RAP cost in Australia?

RAP preparation typically costs between $8,000 and $45,000 depending on site complexity, contaminant type, remediation option evaluation depth and whether a Site Auditor is engaged. Most small-to-medium commercial sites fall in the $12,000–$25,000 range. Larger industrial or petroleum-impacted sites with groundwater plumes can exceed $60,000 when multiple remediation trials are needed.

Can a RAP be prepared without a Detailed Site Investigation?

In almost all cases, no. Schedule B2 of the ASC NEPM 2013 requires the CSM, sampling design and risk assessment of a DSI to underpin remediation objectives. Occasionally a Preliminary RAP is prepared in parallel with a DSI to meet a tight development programme, but the final RAP must be rebuilt against the completed DSI.

Who approves or signs off a RAP?

Sign-off depends on the driver. For EPA-driven projects, an accredited Site Auditor reviews the RAP and issues a Site Audit Statement once validation is complete. For development applications, the local council or its consent authority typically accepts a RAP prepared and signed by a suitably qualified consultant (usually a CEnvP Site Contamination Specialist). For commercial transactions, the RAP is reviewed by the buyer’s environmental advisor.

How long does RAP preparation take?

For a typical commercial site, four to eight weeks from instruction to issue, assuming the DSI is final and validated. Complex sites with multiple treatment trials, community consultation or regulator negotiation can extend to three to six months.

References and further reading

How iEnvi Can Help

iEnvi has prepared Remediation Action Plans for commercial property transactions, petroleum service station closures, industrial remediation, residential redevelopment of contaminated sites, and EPA-driven clean-up matters across QLD, NSW, VIC and SA. Every RAP is signed off by a Principal Environmental Scientist with CEnvP Site Contamination Specialist accreditation and written to pass Site Auditor and regulator review first time.

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