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Questions concerning the relative bioavailability in soil as well as questions for the Technical Review Workgroup for Metals and Asbestos (TRW) or Bioavailability Workgroup may be submitted in any one of the following ways:

Send a question via e-mail to BAhelp@epa.gov.
Call the toll-free TRW Hotline phone number at 1-866-282-8622. If a hotline staff member is not available to speak with you, you may leave a message on the hotline voicemail system.
Write to Aaron Yeow, co-chair of the Technical Review Workgroup for Metals and Asbestos (TRW), at:

Mr. Aaron Yeow
U.S. Environmental Protection Agency
Office of Superfund Remediation and Technology Innovation
1200 Pennsylvania Avenue NW (5202G)
Washington, DC 20460
Contact the Bioavailability Committee co-chairs via e-mail:
- Aaron Yeow, yeow.aaron@epa.gov (OSRTI, U.S. EPA Headquarters)
- Mike Beringer, beringer.michael@epa.gov (U.S. EPA Region 7: Iowa, Kansas, Missouri, Nebraska, and 9 Tribal Nations)
- Karen Bradham, bradham.karen@epa.gov (ORD, Research Triangle Park, NC)

For more information on contacting the Technical Review Workgroup for Metals and Asbestos (TRW), please refer to the TRW Technical Support Center.

Contacting EPA

For a list of general EPA contacts, please visit the EPA Contact Us page.

Contacting the webmaster

These Web pages are maintained by the Office of Superfund Remediation and Technology Innovation. E-mail Yeow.Aaron@epa.gov, BAhelp@epa.gov to submit comments on these Web pages. Or, use this form:

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