Which ERPG level corresponds to irreversible or other serious health effects after a 60-minute exposure?

Which ERPG level corresponds to irreversible or other serious health effects after a 60-minute exposure?

• A. ERPG-1
• B. ERPG-2
• C. ERPG-3
• D. IDLH

Answer: (B)

In airborne hazard assessment, ERPG levels describe what health effects to expect at different concentration levels for a standard exposure duration of about one hour. ERPG-1 is the level where most people could be exposed for an hour without symptoms or only mild irritation. ERPG-2 is the level where most exposed people could be expected to experience irreversible or serious health effects, or require medical treatment, which would make escape more difficult. ERPG-3 indicates concentrations at which death could occur, and IDLH denotes an immediate danger to life or health. For a 60-minute exposure, the level that corresponds to irreversible or other serious health effects is ERPG-2. The other options describe milder effects (ERPG-1), the potential for fatal outcomes (ERPG-3), or conditions where life support is immediately jeopardized (IDLH).

In airborne hazard assessment, ERPG levels describe what health effects to expect at different concentration levels for a standard exposure duration of about one hour. ERPG-1 is the level where most people could be exposed for an hour without symptoms or only mild irritation. ERPG-2 is the level where most exposed people could be expected to experience irreversible or serious health effects, or require medical treatment, which would make escape more difficult. ERPG-3 indicates concentrations at which death could occur, and IDLH denotes an immediate danger to life or health.

For a 60-minute exposure, the level that corresponds to irreversible or other serious health effects is ERPG-2. The other options describe milder effects (ERPG-1), the potential for fatal outcomes (ERPG-3), or conditions where life support is immediately jeopardized (IDLH).