Prolonged or excessive benzene exposure can lead to significant health problems such as aplastic anemia, leukemia and non-Hodgkin lymphoma. For this reason, it’s important that you know the limits for benzene exposure set by the relevant state and federal regulatory agencies if you work in a high risk occupation.

OSHA –The Occupational Safety and Health Administration has a long-term exposure (8-hour shift) limit of 1 part per million (ppm) and a short-term (15 minutes) exposure limit of 5 ppm.

NIOSH –The CDC’s National Institute for Occupational Safety and Health has a long-term (10-hour) exposure limit of 0.1 ppm and a short-term exposure limit of 1 ppm.

ACGIH –The American Conference of Industrial Hygienists has a long-term (8-hour shift) exposure limit of 0.5 ppm and a short-term exposure limit of 2.5 ppm.

These limits are set for airborne exposure; however, benzene exposure may also occur through ingestion and skin contact. Symptoms of benzene exposure include dizziness, drowsiness, tremors, loss of consciousness, vomiting and rapid heartbeat, to name a few.

Any time these or other unusual symptoms are seen after exposure to benzene, it’s vital that medical attention be sought immediately.

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