Water with added chemicals, called wetting agents, that increase water's spreading and penetrating properties due to a reduction in surface tension.

Describes how strongly a fire investigator holds an opinion or conclusion, includes two levels, Possible and Probable.

Soil pushed over the edge of a fireline by a tractor plow or dozer.

A ridge of soil and debris along the outside edge of a fireline, resulting from line construction.

Objects that are easily susceptible to damage from head and flame and can be easily damaged or destroyed by suppression action and/or during the evidence collection process. E.g., cigarette ash.

Any liquid or solid particles. "Total suspended particulates", as used in air quality, are those particles suspended in or falling through the atmosphere. They generally range in size (diameter) from 0.1 to 100 micrometers.

The fire strategy initially used on a wildland fire; the general plan or direction utilized until it succeeds or changes. 

A group of ICS-qualified personnel consisting of an Incident Commander, Command and General Staff, and personnel assigned to other key ICS positions.

A term used in weather primarily to describe a weak disturbance that does not necessarily have an associated storm center or surface low. The disturbance usually does not create severe weather and is frequently associated with a marine air push.

Elapsed time from origin of fire to arrival of the first suppression force.