Wildland Fire Investigation, FIâ210 Origin and Cause Determination
Wildland Fire Investigation, FIâ210 Origin and Cause Determination
Wildland Fire Investigation, FIâ210 Origin and Cause Determination
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<strong>Fire</strong>arm fires are an infrequent occurrence, but bullet strikes from steel-core ammunition or<br />
tracer <strong>and</strong> incendiary rounds can ignite dry fuels. There is usually evidence of firearm use near<br />
the origin. <strong>Fire</strong> <strong>Cause</strong> Categories <strong>Fire</strong>arms <strong>and</strong> ammunition:<br />
An infrequent occurrence<br />
Bullet strikes from steel core ammunition, tracer <strong>and</strong> incendiary rounds are common ignition<br />
sources<br />
• Evidence near the origin could include empty shell casings, target<br />
materials, bullet holes or strike marks, empty shell boxes 5-20 First<br />
Responder – Spontaneous Heating Most fires started from<br />
spontaneous heating originate from inside chip or green slash piles.<br />
Look for evidence of the pile at the origin <strong>and</strong> protect the area from<br />
suppression efforts.<br />
<strong>Fire</strong> <strong>Cause</strong> Categories<br />
Spontaneous heating:<br />
<br />
<br />
Most originate from inside chip or green slash piles<br />
Evidence of the pile will be at the origin<br />
• Do not suppress the origin area 5-21 First<br />
Responder – Electric Fences<br />
Electric fences occasionally start wildfires. Protect the origin, usually along the fence line, <strong>and</strong><br />
do not let the owner attempt to make repairs. <strong>Fire</strong> <strong>Cause</strong> Categories Electric fences:<br />
<br />
<br />
<br />
<strong>Origin</strong> will be along the fence line<br />
Protect the origin <strong>and</strong> the fence line itself<br />
Do not let the owner make repairs<br />
5-22 First Responder – <strong>Origin</strong> Identification<br />
The most important tool you have in identifying the origin area of a wildfire is underst<strong>and</strong>ing<br />
fire behavior. What you learned earlier in this program becomes very important in accomplishing one<br />
of your primary responsibilities as a first responder – locating <strong>and</strong> securing the origin area.<br />
<strong>Fire</strong> behavior:<br />
Accurately identifying <strong>and</strong> protecting the general origin area of a wildl<strong>and</strong> fire is one of your