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Slide 22

    TEXT VERSION OF SLIDE:

    Title: Particle Diameters
    Type: Picture Slide with Line Graph
    Content:
            VISIBLE
          |――――――――――>
             
      |
    |
    |
     
    |
      .01μ   .1μ     10μ   100μ
         
                  | <― RESPIRABLE DUST ―> |    

    Speaker Notes: Dust that is in the non-visible size range is also in the respirable range, which means that it is the most hazardous. Most dusts consist of particles of various sizes. Generally, dust particles smaller than 10 micrometers in size are considered respirable and can penetrate into the lung cavity.