The Definition of Asbestos Exposure

Definition of Asbestos Exposure

Asbestos exposure occurs when microscopic asbestos fibers become airborne, typically during the disturbance of asbestos-containing materials found in older building insulation, flooring, roofing, and fireproofing, and are then inhaled or ingested by workers. Long-term exposure to asbestos fibers is strongly linked to serious diseases including asbestosis, mesothelioma, and lung cancer, often with a latency period of decades between exposure and diagnosis. Because of these severe health risks, asbestos work is heavily regulated in the U.S. under OSHA standards (29 CFR 1910.1001 and 1926.1101), which classify work by risk level and mandate specific controls, training, and medical surveillance requirements.

Example of Asbestos Exposure

Before renovating a building constructed in the 1960s, a contractor conducts an asbestos survey and identifies asbestos-containing floor tile in several areas; specially trained and certified abatement workers, wearing appropriate respiratory protection and using wet removal methods, safely remove the material before general renovation work begins.

Frequently Asked Questions: Asbestos Exposure

Why is asbestos still a workplace hazard if it's largely banned or restricted?

While asbestos use has declined significantly, many older buildings and structures still contain legacy asbestos-containing materials that were installed decades ago, meaning renovation, demolition, and maintenance workers can still encounter and disturb these materials today if proper identification and precautions aren't taken.

What controls are required when working with asbestos-containing materials?

Requirements vary based on the classified risk level of the work, but commonly include specialized training and certification for workers, use of wet methods to minimize fiber release, negative-pressure containment enclosures for higher-risk work, and appropriate respiratory protection along with disposable protective clothing.

What health conditions are associated with asbestos exposure?

Long-term asbestos exposure is linked to several serious conditions, including asbestosis (progressive lung scarring), mesothelioma (a rare and aggressive cancer of the lung and abdominal lining), and an increased risk of lung cancer, with symptoms often not appearing until many years or even decades after the initial exposure occurred.