Maximum pollutant concentration levels, usually set by the Occupational Safety and Health Administration (OSHA).

The production of gases from the chemical deterioration of a substance over time.

Chemicals that contain carbon. Volatile organic compounds vaporize at room temperature and pressure and are found in many indoor sources including many common household products and building materials.

Acronym for the Occupational Safety and Health Administration, a part of the U.S. Department of Labor responsible for determining whether employers are providing working conditions that are safe for employees.