Which exposure limit is typically associated with a 10-hour workday?

The Recommended Exposure Limit (REL) is typically associated with a 10-hour workday and serves as a guideline designed to protect workers from the potential health effects of hazardous substances over an extended period. RELs are established by organizations such as the National Institute for Occupational Safety and Health (NIOSH) and take into account an average exposure that can be sustained without adverse health effects over a typical work period.

In this context, the REL is often more conservative compared to other limits, such as Permissible Exposure Limits (PELs), which are enforceable regulations set by organizations like OSHA for an 8-hour workday and generally refer to exposure over an entire workweek. Short Term Exposure Limits (STEL) are designed for short durations and are not applicable to longer workdays. Ceiling Limits dictate the maximum allowable concentration of a substance that should never be exceeded during any part of the workday, which also doesn’t specifically pertain to the standard 10-hour workday scenario. Therefore, the Recommended Exposure Limit is the most appropriate answer for this question.