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Re: EPA MCLGs


>A related question:  Many toxic elements are essential minerals at low 
>concentrations.  Based on its chemical properties is there any data that 
>uranium is essential at some low value?

Potassium surely is....is this included in the MCLG mandate ....?  I 
haven't had the opportunity to read these yet.


Regards,

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dave Brown, CHP
National Institute of Standards and Technology
100 Bureau Drive, Stop 3543
Bldg 235 Rm A136
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301-975-5810 - office
301-921-9847 - fax
david.brown@nist.gov
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