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• Occupational Hygiene - The art and science devoted to the anticipation, recognition, evaluation, control and confirmation of those environmental hazards or stressors arising in or from the workplace which may cause an adverse health effect, significant discomfort or loss of life among workers or among members in a community.
• TWA: Time Weighted Average
• STEL: Short term exposure limit
• C: Ceiling limit
• Types of exposure measurements

  • Full period single sample
  • full period consecutive samples
  • partial period consecutive samples
  • random (grab) samples
• Sampling Strategy

  • why sample
  • what to sample
  • whom to sample
  • where to sample
  • when to sample
  • how many & long to sample (duration)
• Active sampling requires the use of a pumping device to actively pass air through an air sample container whereas passive sampling does not.
• American Industrial Hygiene Association (AIHA)
• American Conference of Governmental Industrial Hygienists (ACGIH)
• Occupational Hygiene Association of Ontario (OHAO)