Last reviewed: 13 November 2026

A split transfer hose or tank overfill at a tanker depot can release more fuel than any portable spill kit can contain. A credible plan starts with preventing loss of containment, detecting a failure quickly and having engineered systems capable of managing it. Absorbents are useful supporting equipment for small, safe residual leaks.

Focus on high-volume transfer points

Review tanker unloading, fixed tanks, pipework, pumps, loading arms, hose connections and vehicle routes. Check how overfill protection, emergency shut-off, leak detection and transfer supervision work together. Maintain suitable separation between hazardous areas, ignition sources and operational traffic.

Petrol and other flammable liquids present vapour and ignition hazards. Do not direct general warehouse staff to approach an active fuel release with pads. Isolate the area and follow the site’s fire and explosion emergency arrangements; trained responders must decide what can safely be done.

Containment capacity and drainage are design questions

Tank bunds, impermeable transfer areas and controlled drainage should be specified for the liquids and credible incidents involved. A drip trays beneath a coupling may help with routine drips but it does not replace tank bunding or an appropriately designed transfer bay.

Protecting drains may require valves, isolation arrangements and retained fire water as well as portable drain covers. Site operators should know where contaminated surface water would flow before an incident occurs. The legal framework can differ according to the installation, permit and UK nation, and certain depots have specialist regulatory requirements.

Use portable materials only within a safe response

For a small identified hydrocarbon residue after the source has been made safe, oil-only absorbents and spill kits can support clean-up. Recover free fuel where appropriate; keep contaminated absorbents away from ignition sources and classify the waste correctly.

  • Inspect valves, hoses and overfill controls before and after transfer.
  • Exercise emergency shutdown and communication procedures.
  • Check bund condition and remove accumulated rainwater through approved procedures.
  • Train staff to recognise when evacuation and specialist response are required.
  • Review near misses as well as actual releases.

See HSE HSG176: The storage of flammable liquids in tanks and HSE DSEAR guidance. Their scope should be checked against the particular site; not every fuel installation is governed by the same simplified storage rule.