Definitions for "Immediately Dangerous to Life or Health"
Any atmosphere that poses an immediate hazard to life or produces immediate irreversible effects on health that will be debilitating.
Conditions that pose an immediate threat to life or health. Also, conditions that pose an immediate threat of severe exposure to contaminants such as radioactive materials which are likely to have adverse cumulative or delayed effects on health.
any condition that poses an immediate or delayed threat to life or that would cause irreversible adverse heath effects or that would interfere with an individual's ability to escape unaided from a permit space.