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Developed and maintained
by the NFCC

Control measure
Estimate quantity of release or spill

Control measure knowledge

At any hazardous materials incident, the level of risk, scale and impact will be affected by the amount of material that is released or spilled in an uncontrolled state.

The actions and tactics adopted should be based on the scale and likely impact of the incident, which will be influenced by the quantity. It is important that responders can rapidly and accurately estimate or determine the quantity of hazardous materials involved.

The size of container involved is a key piece of information in determining the quantity, but responders should also assess the quantity that is uncontrolled, such as the size of the spill, not just the size of container. Material remaining in the container will pose less of a risk in most cases.

Strategic actions

Fire and rescue services should:
  • Provide staff with equipment and the necessary skills to quickly and safely estimate the quantity involved

Tactical actions

Incident commanders should:
  • Use incident indicators and container volume to estimate the quantity of material involved