Control of Hazardous Substances M505 (replaces W505 OHTA course)

The examination aims to describe how exposure to hazardous substances arises in the workplace and to introduce the methodologies and technologies available to control exposures and thereby reduce risks to health.

Who is it for?

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

How to prepare

Candidates can prepare by self-study, but are recommended to follow appropriate in-company training, University course or other course provided by a reputable training provider.

Learning objectives

On successful completion of this examination, you will be able to: 

  • Describe how airborne contaminants are generated by industrial processes, how this impacts on the control strategy, and how control solutions can thereby be optimised 
  • Recognise the range of approaches to risk reduction embodied in the hierarchy of control and select appropriate strategies for implementation 
  • Describe the meaning of "adequate control", mainly concerning personal exposures;
  • Discuss the importance of design considerations in terms of the workplace, process, and plant, as a means of reducing occupational exposures 
  • Describe the principal elements of a local exhaust ventilation system, give examples of typical installations and know-how to carry out the necessary measurements to assess whether a local exhaust ventilation system is effective and operating to the design specification 
  • Recognise the limitations of local exhaust hoods and enclosures and the means to optimise their effectiveness 
  • Describe how personal protective equipment programmes may be used in an effective manner 
  • Recognise the impact that control measures may have on other workplace hazards and understand the need to take a holistic approach to the design of control solutions 

Assessment

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

M505 is recognised for the purpose of professional training and education by the Faculty of Occupational Hygiene, the Professional Standards Body for UK Occupational Hygiene, Chartered Professional Body and statutory body for the recognition in the UK of overseas professional qualifications in Industrial/Occupational Hygiene.

BOHS is no longer an authorised examining body for the OHTA W505 module or part of the OHTA international training scheme and qualifications framework.

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