Leak Testing Sealed Sources

[Kun-Woo CHO <k201ckw@pinpoint.kins.re.kr>]

Dear Radsafers,
I would like to be enlightened about the technical background of numerical 
values in the following statement.
In the book, "Introduction to Health Physics"(second edition, by Herman 
Cember), on page 394, it says "The source is considered free of surface 
contamination if less than 200 Bq(0.005uCi) alpha or less than 2000 
Bq(0.05uCi) beta activity was wiped off."
It would be also appreciated if the corresponding values in US regulations 
be provided.
Thanks in advance.

Kun-Woo CHO
Korea Institute of Nuclear Safety, Korea
Tel:82-42-862-9975, Fax: 82-42-868-0531
E-mail: k201ckw@pinpoint.kins.re.kr