Indoor air quality is important for employee health and comfort. Poor air quality can lead to several negative health effects, including irritation, coughing, and fatigue. More serious health hazards such as occupational asthma, specific organ toxicity, or cancer can also occur, depending on the chemicals being handled on site. Because of this, the Occupational Safety and Health Administration (OSHA) has developed permissible exposure limits (PELs) for several dusts, fumes, and vapors from various chemicals. These PELs, found in 29 CFR 1910.1000 Table Z-1, identify the maximum concentrations of different chemicals and materials an employee can be exposed over the course of an 8-hour work shift. Employees exposed to airborne concentrations of a material above a PEL may be at risk for serious health hazards. Continue reading “When Should You Retest Your Indoor Air Quality?”