NESHAPS Help

[Paul Lavely <lavelyp@uclink4.berkeley.edu>]

HELP!

I have been trying (it appears unsuccessfully) to put some logic to 
the many regulatory limits. Not the ones we normally think of as 
limits. Ones like the EPA's limit of 4 millirem per year from 
drinking water and 10 millirem under EPA's NESHAPS.

OK, here is the question.

I was under the impression that our exposure limits 5000 mrem WB per 
year for workers and 100 mrem per year for members of the public were 
risk based limits. That is these were based on cancer risk as found 
in BEIR 5. However, I was under the understanding that the EPA's 
"limit" of 10 mrem per year in the NESHAPS rule was a health based 
limit.

I am not trying to address the LNT model etc. My question is, what 
was the basis for the NESHAP limit? Is it risk based or health based? 
Can I get a reference?

Thank you all for being there. I am grateful that there is a place to 
go when I need to get information or advice from other HP 
professionals.



Paul Lavely
UC Berkeley
<lavelyp@uclink4.berkeley.edu>
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