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Control measure

Cordon control: Boil-over

Control measure knowledge

Where a boil-over is suspected or predicted, the incident commander should be vigilant for signs of a boil-over and ensure crews are at a suitable distance away if a boil-over is imminent. A boil-over is usually preceded by a period of quieter burning followed by a marked heightening and brightening of the flames.

See Control measure: Cordon control – Unignited flammable vapours

See Control measure Cordon control – Ignited flammable vapours

Strategic actions

Fire and rescue services should:
  • Provide procedures and support arrangements regarding the hazards that may be encountered and actions to take when implementing hazard area for boil-overs

Tactical actions

Incident commanders should:
  • Establish exclusion zones, inner and outer cordons based on level of risk from a boil-over or slop-over

  • Assess the surrounding risks and potential impact of a boil-over

  • Implement suitable cordon controls from any potential boil-over