The answer to that would be Cancer

lung cancer

Permissible exposure limits are levels of exposures permitted by OSHA, the US Occupational Safety and Health Administration.

Maintaining the health of the workforce, preventing or controlling illness and occupational health exposures, and preventing or reducing disability resulting in lost time

Bertram D. Dinman has written:

'The nature of occupational cancer' -- subject(s): Cancer, Carcinogens, Neoplasms, Occupational diseases