What is a fiber release study? The objective of a fiber release study is to investigate the workplace practices of a person who used an asbestos-containing product and tests whether there would be any asbestos fibers released under those conditions. During the study, air samples are collected in the breathing zone and within the vicinity of the study participant, who is properly protected with a respirator. The air samples are then analyzed by standard microscopy methods to determine the concentration of asbestos present. In some cases, the study can be recorded for retrospective evaluation or training purposes.