noun General Slang

IDLH

· noun · firefighter / hazmat

An atmosphere that will kill or maim you if you breathe it without SCBA.

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Definitions

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Immediately Dangerous to Life or Health. Any atmosphere that would either kill you, do irreversible damage, or stop you escaping under your own power within 30 minutes. Triggers the two-in/two-out rule and mandatory SCBA.

“Meter pegged on CO at the doorway — IDLH, nobody goes in without a pack and a partner.”
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IDLH In A Sentence

Meter pegged on CO at the doorway — IDLH, nobody goes in without a pack and a partner.

Origin & Usage

Defined by NIOSH and codified in OSHA respiratory-protection standard 1910.134. Each chemical has a published IDLH concentration.

Variants I.D.L.H.idlh atmosphere
Tags #firefighter#hazmat#osha#technical#abbreviation

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