From: dlzc1@cox.net   
      
   Dear Dean:   
      
   On Friday, October 9, 2020 at 4:46:43 AM UTC-7, Dean wrote:   
   ...   
   > I am well acquainted with ozone in my workplace.   
   > We use UV lamps to cure coatings and inks.  The   
   > lamps are very good at generating ozone as a   
   > byproduct.  Every now and then, the exhaust   
   > ducting would fail and operators would begin to   
   > complain about headaches, eye irritation and   
   > itchiness.   
      
   The last two symptoms are probably NOx, more than ozone...   
      
   > One trip to the affected area tells me immediately   
   > what the problem is.  We've measured levels from   
   > 0.08 (max recommended over 8 hours) to 1.5 ppm (nasty).   
      
   ... yes, it is amazing that your nose can "get used to" fairly high levels,   
   and not send out a warning.   
      
   >  Shutting down the lamps and getting maintenance   
   > to fix the exhaust is an easy solution.   
      
   Yes, I make ozone into water equipment, I just did not want to act like it was   
   safe to breathe.   
      
   Not trying to claim you did not know what you were talking about.  Just nice   
   to discuss actual "chemistry" here for a change.   
      
   David A. Smith   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)