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Control Measures (Principles of good practice as regards control of…

- - - - Filters the contaminant from the surrounding air
      - Does not provide additional source of oxygen
      - Should not be used for toxic substances or work in confined spaces
      - Advantages
        
        Unrestricted movement when worn
        
        Lightweight and generally comfortable
        
        Can be worm for long periods
      - Limitations
        
        Can only be used in oxygen sufficient atmospheres
        
        Requires careful selection for right type and level of protection
        
        Requires regular cleaning (not often done)
        
        Filters not changed regular enough to ensure protection
        
        Can give a claustrophobic feeling around face
        
        Relies on worker to wear it
        
        Incompatible with other forms of PPE
        
        Interferes with the senses (i.e. Smell)
        
        Effectiveness can be reduced by personal factors (e.g. beards, glasses, weight gain etc)
    - - Provides a separate supply of oxygen to the user
      - Provides higher degree of protection than a respirator
      - Can be used where the contaminant may not be known or there is more than one
      - Avantages
        
        Supplies clean air from uncontaminated source
        
        Has a high assigned protection factor (APF) which offers the best level of protection
        
        Can be worn for long periods if connected to a permanent air supply
      - Limitations
        
        Requires careful selection by a competent person
        
        Portable apparatus can be heavy and cumbersome
        
        Requires special training
        
        Can give claustrophobic feeling around face
        
        Relies on worker to wear
        
        Incompatible with other forms of PPE
        
        Interferes with the senses (i.e. Smell)
        
        Requires emergency plans in the event of malfunction
  - - - Operations and worksites where there is varied sources of contamination
      - Jobs where a lack of oxygen is a problem (breathing apparatus only)
      - Time required for protection is short so not practicable to use other controls
- - - - for e.g Tinnitus, associated with inner ear damage caused by repeated exposure to loud noises
    - - Use of industrial mowers to cut grass, close by loud noise for long periods
    - - i.e simple questioning, Does the ringing or buzzing sound come and go? Does the problem affect one or both ears. Then if there is cause for concern, undertake Pure tone audiometry tests (PTA)