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A 26-year-old male asked:

How much concrete dust would you have to inhale to get acute silicosis and how long of an exposure must it be? i mean acute not chronic silicosis

1 doctor answer • 2 doctors weighed in
Dr. Roy Arnold
Dr. Roy Arnoldanswered
Internal Medicine 49 years experience
OHSA PEL: or Permissible Exposure Limits are 0.1mg/cubic meter over 8 hours. Stationary masonry saws without dust controls like wet sawing can generate 20 times this amount. With no respirator or dust controls, sufficient exposure for acute silicosis might result in as little as 4-6 weeks of 40 hours/week. Visible dust is no indicator since those particles are too large to reach lungs.
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Dr. Alan Ali
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Last updated May 23, 2016

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