              Chemical Form Information for Inhalation Data

The inhalation data sets include multiple chemical forms for a number of 
radionuclides.  The headers for the DRT and RSK files do not contain sufficient
information to sufficiently identify the particular chemical form.  This file
identifies the order of the considerations.

     Element    Order of Chemical Forms
     H          F
                M
                S
                Tritiated water vapor (HTO)
                Elemental H
                Organic H
     C          F
                M
                S
                Carbon monoxide
                Carbon dioxide
     S          F
                M
                S
                dioxide
                carbon disulfide
     Ni         F
                M
                S
                vapor
     Ru         F
                M
                S
                vapor
     Te         F
                M
                S
                vapor
     I          F
                M
                S
                vapor
                methyl
     Hg         Inorganic Type F
                Inorganic Type M
                Inorganic Type S
                Organic Type F
                Organic Type M
                Organic Type S
                vapor

Each radionuclide of an above element considers sequentially each of the
chemical forms in the indicated order.
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