People can be exposed to bitumen in the workplace by breathing in fumes or skin absorption. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit of 5mg/m3 over a 15-minute period.
people can be exposed to bitumen in the workplace by breathing in fumes or skin absorption the national institute for occupational safety and health (niosh) has set a recommended exposure limit of 5mg/m3 over a 15-minute period