Measurement of Hazardous Substances W501

This course provides you with a sound understanding of the techniques for assessing exposure to hazardous substances in the workplace and with an understanding of how exposure information can be used to assess risk. 

Who is it for?

This course is suitable for technicians and technologists who carry out measurements and testing in workplaces. 

How is it delivered?

This course typically runs as a five-day taught course (minimum 45 hours including lectures, tutorials, practical/demonstration sessions, guided reading, overnight questions and examination). 

Learning objectives

On completing this course, you will able to: 

  • describe the general approach to health risk assessment, including the role of atmospheric monitoring; 
  • select appropriate equipment to measure specific airborne contaminants and devise a suitable sampling strategy; 
  • present the results in a form useful for health risk assessment purposes to enable management to comply with relevant legislation. 


There will be a 40 short answer question “open book” examination with an allowed time of 120 minutes. 

BOHS is the only awarding body for the W500 series occupational hygiene modules as part of the OHTA International Training Scheme and Qualifications Framework.


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