Vacuum Truck (General — Non-NDD) SWMS

Vacuum truck operations for general (non-NDD) applications including drain cleaning, pit dewatering, spill recovery and bulk liquid/sludge transfer are classified as High Risk Construction Work under WHS Regulation 2011 r291 where the work is carried out adjacent to confined spaces, involves potentially hazardous substances, or generates atmospheric risks from suction-induced pressure differentials. The combination of high-vacuum suction (typically 25–27 inHg), heavy mobile plant, exposed hose runs and unknown pit contents creates a compounding risk profile that mandates a documented Safe Work Method Statement before any task commences. A SWMS is legally required under WHS Regulation Part 6.3 and must be prepared in consultation with workers, kept accessible at the workplace, and reviewed whenever controls change or an incident occurs. This template addresses the specific hazard pathways unique to non-NDD vacuum work — distinct from hydro-excavation — including unidentified pit atmospheres, traffic interface, hose whip and waste classification under the Environment Protection legislation of the relevant state.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

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

1. 1Elimination — Where pit contents can be characterised as non-hazardous water only, eliminate vacuum truck use and deploy a standard sump pump with discharge hose to remove suction-pressure hazards entirely.
2. 2Elimination — Prohibit any worker entry into the pit, drain or vessel being vacuumed; treat the void as a no-go confined space throughout the suction operation.
3. 3Substitution — Substitute high-vacuum operation with low-vacuum or gravity-assisted decant where pit depth and content viscosity permit, reducing hose-whip energy and atmospheric disturbance.
4. 4Substitution — Replace generic suction hose with anti-static, kink-resistant composite hose rated to AS 2554 when recovering hydrocarbons or unknown liquids near ignition sources.
5. 5Engineering — Install certified pit edge protection, hose-guide rollers and tiger-tail wear sleeves; fit whip-checks to all camlock and storz couplings per AS/NZS 4801 plant safety principles.
6. 6Engineering — Deploy continuous 4-gas atmospheric monitoring (O2, LEL, H2S, CO) at the pit opening with audible alarms set to LEL 10%, O2 19.5–23.5%, before and during suction.
7. 7Administrative — Conduct documented pre-start with all crew using this SWMS, review SDS for any known contaminants, complete a Take-5, and confirm spotter and exclusion zones before engaging PTO.
8. 8Administrative — Implement traffic management plan compliant with AS 1742.3, including signage, cones, rotating beacons and a dedicated spotter for all reversing and hose deployment movements.
9. 9PPE — Mandatory chemical-resistant gloves (nitrile/neoprene per AS/NZS 2161.10), splash goggles, P2/ABEK respirator on standby, hi-vis to AS/NZS 4602.1, steel-cap boots and FR coveralls for hydrocarbon work.
10. 10PPE — Provide hearing protection rated SLC80 ≥26dB per AS/NZS 1270 for all personnel within 10m of the operating blower, and bonded earthing strap on operator wrist during flammable liquid transfer.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a Tuesday morning at a suburban shopping-centre car park, a two-person vacuum truck crew is tasked with pumping out a grease arrestor pit that has surcharged overnight. Before engaging the PTO, the operator opens this SWMS on the tablet mounted in the cab and walks the offsider through it at the pre-start brief. They identify the top three hazards from the document — toxic atmosphere release, fall into the open pit, and traffic interface with the adjacent service lane — and confirm the control measures: 4-gas monitor calibrated that morning, two witches hats and a spotter board positioned per the traffic plan, and edge-protection mats laid around the pit lid. Both workers sign the SWMS sign-on register on the tablet. Twenty minutes into suction, the LEL alarm sounds at 12% — likely fermenting organics. Per the during-task control in this SWMS, the operator immediately throttles the blower down, retreats the offsider 10m upwind, and waits for ventilation to bring readings back below 5% LEL before resuming. The deviation and corrective action are logged against the SWMS record, and the shopping-centre facilities manager is notified before the team continues. The document functioned as the live decision tool, not a filing-cabinet formality.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• AS 2865 — Confined spaces

Frequently asked questions