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From Wikipedia, the free encyclopedia. The permissible exposure limit (PEL or OSHA PEL) is a legal limit in the United States for exposure of an employee to a chemical substance or physical agent such as loud noise. Permissible exposure limits are established by the Occupational Safety and Health Administration (OSHA).
OSHA (the Occupational Safety and Health Administration) is a part  of the US Department of Labor that establishes, issues, and  enforces national workplace safety regulatioâ¦ns. These are designed  to make job areas and practices safer for US workers.