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Toxic substances are chemicals or mixtures that may present an unreasonable risk of injury to health or the environment. They include chemical substances, mixtures, and categories like arsenic, asbestos, benzene, and more.
Hazardous substances are any materials that pose a threat to human health and/or the environment. Typical hazardous substances are toxic, corrosive, ignitable, explosive, or chemically reactive.
Subpart Z -Toxic and Hazardous Substances is the largest subpart under 1910. It contains 1910.1000Air Contaminants. Here you will find the Z tables, Z-1, Z-2, and Z-3. These tables provide the exposure limits for many substances found in the workplace, expressed in permissible exposure limits (PELs).
This subpart also contains the substance-specific requirements for 28 chemicals, such as asbestos and formaldehyde.
Employers with hazardous chemicals in their workplace must: