Workers in an area with propane powered lift-trucks are exposed to carbon monoxide in the range of 8 - 15 ppm as determined by direct reading instruments throughout the day.

• The Current OEL (Ontario/ACGIH) for Carbon monoxide is 25ppm
  Clinical symptoms range from subtle cardiovascular, respiratory, and neurobehavioral effects at low concentrations (10 ppm).
• Discuss how this could affect a decision about control strategies
• Include examples of decision criteria
• If workers were experiencing headaches and tiredness would that impact the decision?

2:  A new process is brought into a workplace that uses adhesives and thus exposes workers to formaldehyde. 

• The International Agency for Research on Cancer (IARC) concluded that formaldehyde is "carcinogenic to humans".
• Discuss how and why you could apply ALARA and the precautionary principle in a decision about controls

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