If: | Then you must use feasible controls to: |
You have operations where employees clean and repair barges or tankers which have contained benzene | Keep all employee exposure concentrations below 10 parts per million (ppm). |
You can document that benzene is used for less than thirty days a year in the workplace | Reduce eight-hour employee exposure monitoring results to a time-weighted average of 10 ppm or less. |
Note: | |
If employee exposure monitoring results are between 1 and 10 ppm, you are permitted to use respirators or a combination of respirators and feasible controls to protect employees. | |
Employees are exposed to benzene above a PEL for at least thirty days a year | Reduce eight-hour employee exposure concentrations to the TWA8 of 1 ppm or less; |
AND | |
Reduce fifteen-minute employee exposure concentrations to the STEL of 5 ppm or less. |