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Re: Mercury in limestone, shale, natural gypsum, etc.?

The economic study made in conjunction with the TRI PBT rule may have
information responsive to your needs. Go to 'www.epa.gov/tri' , under 'What's
New?', click on 'PBT Chemicals', then click on 'Economic Analysis of the Final
Rule to Modify Reporting of Persistent Bioaccumulative Toxic Chemicals Under
EPCRA Section 313 (posted November 22, 1999)'

Good luck!

sisaac@rti.org on 06/23/2000 10:16:44 AM

Please respond to sisaac@rti.org

To:   p2tech@great-lakes.net

Subject:  Mercury in limestone, shale, natural gypsum, etc.?

I'm working on a project (07620.003.075) to evaluate environmental issues
related to mercury concentrations in coal combustion byproducts (fly ash,
bottom ash, FGD residues, etc.)
As part of the project, I'm hoping to get information on mercury
concentrations in some of the natural materials for which these coal
combustion byproducts might be substituted. The natural materials include
limestone (as input to cement kilns,as an agricultural soil amendment, and
other uses), shale, natural gypsum (as used in wallboard, for example), etc.

Has anyone done any work where you've looked at mercury in any of these
naturally occuring materials? If so, could you contact me?

Stacey Isaac
Research Assisatant 3, Pollution
         Prevention Program, RTI
P.O. Box 12194
RTP, NC 27709-2194
(919) 541-1253