|Soot damage from a small fire in a building - Another reason to stay low in a fire.|
Sampling the soot can be done with a swab or an air sampler with later chemical analysis done by a laboratory. As a preliminary test, an Air-o-cell cassette air sample can be taken from the area. The soot particles have a fairly easily recognizable shape. The individual soot particles are often less than 2.5 microns but will be attracted together in larger masses as seen in the photo below.
|Air-o-Cell air sample of a soot particle - microscope photo: The distance between 0 and 1 is 25 microns.|