Re:RE: Ambient Air Criteria for Uranium

[Dan Hoffman <dan_hoffman@wssrap-host.wssrap.com>]

I believe the 10 mg weekly limit on intake of soluble U is based on the ACGIH
Threshold Limit Value of 0.2 milligrams per cubic meter, 8-hr Time-Weighted
Average.  Assuming a inhalation rate of 20 lpm and a 40-hour work week, it
calculates out pretty close.

Dan Hoffman
Jacobs Eng. Group
Weldon Spring Site
____________________Reply Separator____________________
Subject:    RE: Ambient Air Criteria for Uranium 
Author: <radsafe@romulus.ehs.uiuc.edu>
Date:       9/1/99 3:27 PM

Leo,

The US Nuclear Regulatory Commission regulations in Title 10 CFR Part
20.1201(e) also states, "In addition to the annual dose limits, the licensee
shall limit the soluble uranium intake by an individual to 10 milligrams in
a week in consideration of chemical toxicity (see footnote 3 of appendix B
to part 20)."  Part 20.1201 is titled, "Occupational dose limits for adults"
and is available at http://www.nrc.gov/NRC/CFR/PART020/part020-1201.html .
In addition there are limits set by Industrial Hygienist.  If you need more
on that send me an e-mail and I'll see what I can find.

Ray Carroll
carrollrg@pgdp.usec.com


-----Original Message-----
From: William V Lipton [mailto:liptonw@dteenergy.com]
Sent: Wednesday, September 01, 1999 2:13 PM
To: Multiple recipients of list
Subject: Re: Ambient Air Criteria for Uranium


The chemical toxicity of uranium is covered in 10 CFR 20, Appendix B,
footnote
3.

The opinions expressed are strictly mine.
It's not about dose, it's about trust.

Bill Lipton
liptonw@dteenergy.com


SENES Consultants Limited wrote:

> Hello:
>
> Does anyone know of the existence of any ambient air quality criteria for
> uranium in any country, jurisdiction. etc,  in particular relating to the
> chemical toxicity of uranium?  Is so,  any references/publications listing
> the criteria would be appreciated.
>
> Thanks for any help you might be able to provide.
>
> Leo M. Lowe, Ph.D.
> Associate, Senior Health and
> Environmental Physicist
>
> SENES Consultants Limited
> 121 Granton Drive, Unit 12
> RICHMOND HILL, Ontario
> Canada L4B 3N4
> Tel:  (905) 764-9380
> Fax:  (905) 764-9386
> Email Address:  llowe@senes.on.ca
> Web Site:  http://www.senes.on.ca/
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