Gypsum

["Richard F. Orthen" <rorthen@EARTHSCIENCES.NET>]

Where are published credible values found for the typical isotopic assay

(U-Ra-Th et. al.) of the following gypsum materials: (1) phosphogypsum

"stacks", (2) mine, (3) synthetic (FGD), and (4) underlayment (flooring)?

Trying to objectively demonstrate whether the demolition waste profile

signature I have is classifiable as NORM or TENORM.  The major gypsum

suppliers (like USG) don't have a clue about this aspect of their products,

although some are smart enough not to source phosphogypsum.  Any leads would

be greatly appreciated.  Thank you.



Rick Orthen







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