[ RadSafe ] Activity question

[LNMolino at aol.com]

recently eBay the online auction site has "banned radioactive" items from  
their site. In a recent letter to a person offering unprocessed ores on the site 
 (a seemingly common practice) the following statement was made  by eBay.
 
"Please also remember that anything that has a specific activity greater  
than 70 Bq per gram (.002 microcurie per gram) is not permitted on eBay under  
any conditions."
 
So to that end I pose this question. Why the above "limit" what makes 70 Bq  
the "magic number" or rather might there be a "scientific basis for such a  
"limit"?
 
Thanks.
 
Louis N.  Molino, Sr., CET
FF/NREMT-B/FSI/EMSI
LNMolino at aol.com
979-690-7559  (Office)
979-412-0890 (Cell Phone)
979-690-7562 (Office Fax)

"A  Texan with a Jersey Attitude"

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