Asbestos Soil Remediation SWMS

Asbestos soil remediation is the controlled excavation, handling and disposal of soil contaminated with asbestos fibres or fragments, typically arising from historic demolition, illegal dumping or buried asbestos-containing material. A Safe Work Method Statement is mandatory because the work is high risk construction work under the Work Health and Safety Regulation and, where fibre is disturbed, attracts the full licensed asbestos-removal regime. The primary hazard is respirable asbestos fibre liberated when contaminated soil is dug, screened, loaded or transported, against which there is no safe exposure threshold. Soil work adds its own risks: trench and excavation collapse once depth exceeds 1.5 m, co-contaminants such as lead, arsenic and hydrocarbons, underground service strikes, powered-mobile-plant movement across the site, and the public-protection duty to prevent off-site fibre transport from an open, wind-exposed excavation. This SWMS runs the project from site setup and exclusion-zone establishment through continuous wetting, controlled excavation, lined and sealed disposal, and a final Clearance Certificate before the area is released. It is supplied in eight jurisdiction editions, each citing its own Act, Regulation and regulator; the harmonised asbestos provisions (register 425, management plan 429, notification 466, clearance 473/474, air monitoring 475, Class A/B licensing 485/487) are common across the harmonised states, while environmental and contaminated-land statutes are left to each state's own legislation. It supports licensed work — it does not replace the licence.

Hazards identified

8 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Remove and dispose of asbestos-impacted soil intact in lined, sealed loads rather than processing or screening it on site, eliminating dust generation at the point of disturbance
2. 2Substitution — Substitute controlled hand-picking of bonded fragments under continuous wetting for mechanical screening wherever the contamination profile allows
3. 3Engineering — Continuous atomised wetting of disturbed soil (minimum coverage) to suppress airborne fibre throughout excavation and loading
4. 4Engineering — Battered or shored excavation faces designed for the soil class to prevent collapse beyond 1.5 m depth
5. 5Engineering — Lined and sealed haulage with wheel-wash and load covering before vehicles leave the exclusion zone
6. 6Administrative — Regulator notification at least 5 working days before licensed removal, with a documented remediation and validation plan
7. 7Administrative — Underground-services location (dial-before-you-dig, potholing) and a permit before excavation
8. 8Administrative — Independent air monitoring by a Licensed Asbestos Assessor during works, with a Clearance Certificate before the area is released
9. 9PPE — Class A: air-line respirator (continuous supplied air) or full-face PAPR (P3); Class B: full-face PAPR (P3 minimum)
10. 10PPE — Category 3 Type 5/6 disposable coveralls taped at the wrists and ankles, single-use, disposed of as asbestos waste

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a Thursday morning a remediation crew from Alluvial Civil arrives at a former industrial lot where buried fibre cement fragments were found during a site investigation. Before the excavator starts, the supervisor confirms the regulator notification, checks the dial-before-you-dig plans, and has the team potholing to expose a gas main near the dig line. The exclusion zone is signed and fenced, and an atomised wetting line is run across the contaminated area. As the excavator lifts each bucket, a Class A removalist hand-picks visible fragments under spray and the Licensed Asbestos Assessor monitors airborne fibre downwind; readings stay low while wetting is maintained. Contaminated soil is loaded directly into lined, sealed trucks — never stockpiled or screened — and trucks pass through a wheel-wash before leaving. The excavation face is battered to the designed angle as depth passes 1.5 m. At the end of the dig the Assessor takes validation samples; only once the laboratory confirms clearance and a Certificate is issued is the area handed back and the exclusion zone removed.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• National Environment Protection (Assessment of Site Contamination) Measure 2013
• How to Safely Remove Asbestos Code of Practice

Frequently asked questions