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rock wool



Regarding the thoriated Dutch door.....
There was a paper a few years ago describing measurement of
Rn-220 levels in a home originating from rock wool insulation. Just
another miscellaneous mother nature fact.

-- 
the above are the personal musing of the author,
and do not represent any past, current, or future
position of NIST, the U.S. Government, or anyone else
who might think that they are in a position of authority.
NBSR Health Physics
NIST
Gaithersburg, MD 20899
301 975-5810
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Lester.Slaback@nist.gov
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