Industrial Hygiene Sampling

Industrial hygiene sampling is the practice of measuring how much of a hazard, like asbestos fibers, is in the air of a workplace. Technicians collect air onto filters over a work shift and count the fibers under a microscope to estimate a worker's exposure. The results are reported as fibers per cubic centimeter of air.

Origin

Systematic airborne fiber sampling grew out of occupational hygiene programs in the mid-20th century and was standardized as agencies like OSHA and NIOSH set permissible exposure limits from the 1970s onward.

Significance in Asbestos Context

For a patient's case, industrial hygiene sampling data can help show how heavy the exposure was at a particular job or with a particular product. Historical measurements, or reconstructions based on similar tasks, let experts estimate cumulative dose in fiber-years, which links the exposure to the disease. Defendants often argue that measured levels were below the limits allowed at the time, so experts explain that those "permissible" limits were set far too high and that no safe threshold for mesothelioma has been established. A complete absence of sampling records can itself be evidence that a company failed to monitor a known hazard.

Example Sentence

The plaintiff's expert used industrial hygiene sampling from comparable insulation work to estimate the fiber concentrations the pipefitter breathed in the 1960s.

Related Terms

Fibers per Cubic Centimeter, Cumulative Exposure, Permissible Exposure Limit, Exposure Reconstruction, Dose-Response, NIOSH

Notes

• Ask whether any air-monitoring records exist for your former employers or job sites.
• A lack of sampling records may show an employer ignored its duty to measure a known hazard.
• Detailed descriptions of your tasks let an expert reconstruct exposure when direct measurements are missing.