# Federal Register
1 - 79:61383-61438 - Chemical Management and Permissible Exposure Limits (PELs) - PDF
# Regulations
1 - 1917.23 - Hazardous atmospheres and substances (see also §1917.2 Hazardous cargo, material, substance or atmosphere).
# Settlement Agreement
1 - Industry Settlement Agreement - Steelworkers - 06/21/1994