Occupational Hygiene Surveys

A preliminary survey, sometimes called an observational survey, involves a walking tour of the workplace (hence the more descriptive name, “walk-through”).

Some of the benefits of a preliminary survey include:

  • obtaining an overview of the whole operation;
  • identifying the key hazards in each area; and
  • assessing the effectiveness of any control methods in place.

During a walk-through, the occupational hygienist will be asking:

  • Are measurements needed in this area?
  • If so, what hazards should be measured?
  • Where should they be taken?
  • Which workers should have their exposure assessed?
  • When should the measurements be made?
  • What conclusions might be drawn from the results?

The Occupational Hygienist might then recommend an Occupational hygiene or monitoring survey to obtain quantitative exposure levels or even a formal occupational health and safety risk assessment.

Occupational hygiene survey or monitoring survey is the quantitative measurement of workplace stressors including the following:

  • Noise (occupational and environmental)
  • Hazardous chemical substances (including lead and asbestos)
  • Thermal stress
  • Indoor air quality
  • Illumination
  • Vibration