ALERT Learn More | NASP Certification Program: The Path to Success Has Many Routes. Choose Yours

Air Sampling

Last updated: February 20, 2019

What Does Air Sampling Mean?

Air sampling is the process of capturing contaminants in a known volume of air. The airborne contaminants are measured and compared against the volume of air, and the results are stated as a concentration, usually as milligrams per cubic meter (mg/m3) or parts per million (ppm).

There are two main types of air sampling that can be conducted to estimate the level of workers' exposure to a certain contaminant – stationary or area monitoring, and personal chemical exposure monitoring. Personal exposure monitoring measures an individual employee's exposure to a chemical or contaminant and area monitoring measures the concentration of a substance in a given area.

Safeopedia Explains Air Sampling

Levels of airborne contaminants can be compared with the following guidelines and standards:

  • Permissible exposure limit (PEL) which are promulgated by the OSHA and are legally enforceable. PELs are 8-hour, time-weighted averages of airborne exposure.
  • Threshold limit value (TLV), which are guidelines developed by the American Conference of Governmental Industrial Hygienists (ACGIH) and are published annually by that organization. Like PELs, TLVs are also 8-hour, time-weighted averages.
  • Recommended exposure level (REL) are developed by NIOSH. These levels are the exposures that, in the judgement of NIOSH, will not cause adverse health effects in most workers.


air quality monitoring

Share this Term

  • Facebook
  • LinkedIn
  • Twitter

Related Reading


HazardsEnvironmentalEHS ProgramsSafety HazardProtective Clothing

Trending Articles

Go back to top