Health & Safety
Occupational Health and Safety
Questions
1. (15 marks) The TLV for carbon monoxide is 35ppm. Define the terms TLV and ppm and calculate them for the following example:
Answer:
TVL = Term for airborne concentration of a substance, below which all workers are believed to be protected while exposed to it day after day for 8-hour periods.
PPM = Concentration by volume of one part of a gas, or by weight of a liquid or solid, per million parts of air or liquid.
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
1. 2 hours @ 34 ppm
2. 5 hours @ 40 ppm
3. 1 hour @ 20 ppm
Is the worker over-exposed during the duration of the work-shift?
Answer:
Yes the worker is over-exposed during the duration of their 8 hour shift.
What is the primary concept of hazard recognition and the hierarchy of hazard control?
Answer:
The primary goal of hazard recognition is “to reduce incidents, accidents, injuries and property damage.”
The primary concept of the hierarchy of hazard control is “source-path-human intervention. Of which elimination is an option if a task it too dangerous.”
The specific hierarchy outlined on slide 13 of the Instructor notes for week 7 is as follows:
1. Engineering Controls
2. Administrative Controls
3. Personal Protective Equipment
Going through this list – explain how they might be applied to this example to provide potential solutions.
Answer:
1. Engineering Controls:
- Develop process to monitor the carbon monoxide levels in order to ensure that they do not rise above the TVL, there were a number of hours in the shift that the levels were below the limits so it is manageable.
- Improved exhaust ventilation systems.
- Processes to reduce the need for carbon monoxide production.
2. Administrative Controls:
- Reduce the shift lengths to
Questions
1. (15 marks) The TLV for carbon monoxide is 35ppm. Define the terms TLV and ppm and calculate them for the following example:
Answer:
TVL = Term for airborne concentration of a substance, below which all workers are believed to be protected while exposed to it day after day for 8-hour periods.
PPM = Concentration by volume of one part of a gas, or by weight of a liquid or solid, per million parts of air or liquid.
A mechanic in an automotive repair shop is exposed to the following carbon monoxide levels over an 8 hour shift.
1. 2 hours @ 34 ppm
2. 5 hours @ 40 ppm
3. 1 hour @ 20 ppm
Is the worker over-exposed during the duration of the work-shift?
Answer:
Yes the worker is over-exposed during the duration of their 8 hour shift.
What is the primary concept of hazard recognition and the hierarchy of hazard control?
Answer:
The primary goal of hazard recognition is “to reduce incidents, accidents, injuries and property damage.”
The primary concept of the hierarchy of hazard control is “source-path-human intervention. Of which elimination is an option if a task it too dangerous.”
The specific hierarchy outlined on slide 13 of the Instructor notes for week 7 is as follows:
1. Engineering Controls
2. Administrative Controls
3. Personal Protective Equipment
Going through this list – explain how they might be applied to this example to provide potential solutions.
Answer:
1. Engineering Controls:
- Develop process to monitor the carbon monoxide levels in order to ensure that they do not rise above the TVL, there were a number of hours in the shift that the levels were below the limits so it is manageable.
- Improved exhaust ventilation systems.
- Processes to reduce the need for carbon monoxide production.
2. Administrative Controls:
- Reduce the shift lengths to