1,3-Butadiene
For 1,3-Butadiene, cfr section is 1910.1051; action level is 0.5 ppm calculated as an eight (8)-hour time-weighted average; pel is one (1) part BD per million parts of air (ppm) measured as an eight (8)-hour time-weighted average; five parts of BD per million parts of air (5 ppm) as determined over a sampling period of fifteen (15) minutes; surveillance trigger is each employee with exposure to BD at concentrations at or above the action level on 30 or more days or for employees who have or may have exposure to BD at or above the PELs on 10 or more days a year; exam frequency is At time of initial assignment; at least every 5 years; within 30 days after exposure during emergency; at reassignment to non-BD area if 12 months or more have elapsed since last exam; at termination if 12 months or more have elapsed since last exam, recorded from its source on 2026-08-12.
- Substance
- 1,3-Butadiene verified
- CFR section
- 1910.1051 verified
- Action level
- 0.5 ppm calculated as an eight (8)-hour time-weighted average
- PEL
- one (1) part BD per million parts of air (ppm) measured as an eight (8)-hour time-weighted average; five parts of BD per million parts of air (5 ppm) as determined over a sampling period of fifteen (15) minutes
- Surveillance trigger
- each employee with exposure to BD at concentrations at or above the action level on 30 or more days or for employees who have or may have exposure to BD at or above the PELs on 10 or more days a year
- Exam frequency
- At time of initial assignment; at least every 5 years; within 30 days after exposure during emergency; at reassignment to non-BD area if 12 months or more have elapsed since last exam; at termination if 12 months or more have elapsed since last exam
- Record retention
- duration of employment plus 30 years
What the source says
1910.1051 1,3-Butadiene." /> 29 CFR §
— law.cornell.edu, retrieved 2026-08-12
Source
- law.cornell.eduhttps://www.law.cornell.edu/cfr/text/29/1910.1051