It is the goal of NIOSH to re-evaluate all IDLH values included in the list below using the guidelines and criteria included in CIB 66. Until this occurs, this list contains IDLH values based on both the 1994 revised criteria and CIB 66 [NIOSH 2014-100]. It is important to note which criteria was applied to develop a specific IDLH value.

2019年2月5日 · In the 1970s, the National Institute for Occupational Safety and Health developed IDLH values to protect first responders and other workers from toxic workplace chemicals. IDLHs are supposed to...

2019年5月10日 · The Immediately dangerous to life or health air concentration values (IDLH values) developed by the National Institute for Occupational Safety and Health (NIOSH) characterize these high-risk exposure concentrations and conditions and are used as a component of respirator selection criteria first developed in the mid-1970s.

The term immediately dangerous to life or health (IDLH) is defined by the US National Institute for Occupational Safety and Health (NIOSH) as exposure to airborne contaminants that is "likely to cause death or immediate or delayed permanent adverse health effects or prevent escape from such an environment." Examples include smoke or other ...

1995年5月1日 · Fire fighters working in teams of two or more (buddy system) in hazardous areas (IDLH atmospheres) are required to maintain communications (voice, visual contact, or tethering with a signal line). Radios or other means of electronic contact shall not be substituted for direct visual contact between employees within the individual team in the ...

2025年1月10日 · Addressing and improving a structure’s IDLH environment is essential for ensuring firefighter safety and enabling effective emergency response. Firefighters working in IDLH environments face numerous challenges that put their lives and long-term health at risk.

2022年8月15日 · The alarm levels of the oxygen sensor on a four-gas meter are considered IDLH (immediately dangerous to life and health) atmospheres. The low level is 19.5 percent oxygen. At this percentage,...

2011年4月1日 · The Respiratory Protection standard specifically provides that firefighters entering an immediately dangerous to life or health (IDLH) atmosphere must wear a self-contained breathing apparatus (SCBA).

1998年4月29日 · The safety of firefighters engaged in interior structural firefighting is the major focus of paragraph (g)(4) of the OSHA Respiratory Protection standard. This provision requires that at least two employees enter the Immediately Dangerous to Life or Health (IDLH) atmosphere and remain in visual or voice contact with each other at all times.

Within the IDLH/Hot Zone, all Firefighters should always use a self-contained breathing apparatus along with the other elements of personal protection equipment (PPE) required for maximum safety possible in this dangerous area.