- Tobacco Smoke: There is no safe level of exposure to tobacco smoke. Even low levels can increase the risk of cancer. - Asbestos: OSHA has set the permissible exposure limit (PEL) for asbestos at 0.1 fibers per cubic centimeter of air over an 8-hour workday. - Radon: The EPA recommends that indoor radon levels should be below 4 picocuries per liter (pCi/L) of air. - UV Radiation: The World Health Organization (WHO) suggests limiting direct sun exposure, especially during peak hours, and using protective measures like sunscreen and clothing. - Formaldehyde: OSHA's PEL for formaldehyde is 0.75 parts per million (ppm) as an 8-hour time-weighted average.
