Re: More or Less Dioxin??? (was Re: Dioxin Sources

[DrBillC@aol.com]

  Philip:
  
  Accept it or not, the data's the data.  Numerous studies of environmental
  samples like lake core sediments, herbage, soils and even human tissues like
  fat and breast milk show a consistent picture.  The amount of the reduction
  over time varies from sample to sample but the shape of the curve is the
  same.  A good summary is Allcock and Jones ES&T 30,3133 (1996) but there are
  others including a couple from Dioxin '96.  The data doesn't depend on a
  measurement of emissions by source as the Hites work you reference, it looks
  at deposition in the environment and probably gives a better relative look.
   Hites himself did some of the first work on this kind of sampling (Accts
  Chem Res 23, 194 (1990), reproduced by Thomas & Spiro ES&T 30, 82A (1996)).
  
  Why is this bad news?  The world isn't perfect, but it's better.  I think
  that's good.
  
  Bill Carroll
  Chlorine Chemistry Council