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Control measure

Isolate or limit liquids

Control measure knowledge

See Hazard - Flammable or explosive atmosphere; Control measure - Isolate gases, liquids and other flowing materials.

In addition, the key control measure will be to isolate the flow of the particular liquid. This may be possible in industrial-type confined spaces such as vats and silos. However, in confined spaces affected by weather, water distribution or sewerage, it may not always be possible, so personnel should be extra vigilant and take extra precautions. Using appropriate submersible or other pumping equipment to remove liquid or reduce levels should also be considered. The level of liquid in the confined space should be continually monitored while crews are committed.

Strategic actions

Fire and rescue services should:
  • Ensure that attending personnel are aware of the dangers presented by the inflow of liquids in confined space environments
  • Ensure that those supervising confined space operations are able to recognise and inform attending crews of this hazard

Tactical actions

Incident commanders should:
  • Identify the potential for liquids to enter confined spaces, including surface water

  • Isolate all sources of liquid ingress to confined spaces where possible
  • Implement suitable contingency arrangements where there is a risk of liquid ingress into a confined space