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Technical Review Workgroup for Metals and Asbestos (TRW)

The TRW is an interoffice workgroup convened by the U.S. EPA Office of Solid Waste and Emergency Response/Office of Superfund Remediation and Technology Innovation (OSWER/OSRTI). Its goal is to support and promote consistent application of the best science in the field of risk assessment for metals and asbestos at contaminated sites nationwide. The TRW is composed of several committees: Lead Committee, Arsenic Committee, Asbestos Committee, and Bioavailability Committee.

Lead Committee Mission

The Lead Committee Mission reviews applications of metals and asbestos risk assessment methodologies at hazardous waste sites. Primarily, these reviews are intended to promote the application of scientifically sound and consistent approaches to risk assessment. The Lead Committee is responsible for developing national guidance and documentation on the structure, application, and validation of the IEUBK model. The Lead Committee reviews applications of other exposure, uptake, and biokinetic models used to assess lead risks at sites in which children are not expected to be the most sensitive population, such as industrial land use scenarios. The Lead Committee also advises Office of Superfund Remediation and Technology Innovation (OSRTI) management on risk assessment concerns for metals and asbestos.


Expertise of the Lead Committee

The principal members of the Lead Committee are technical staff from EPA Regions, Office of Solid Waste and Emergency Response (OSWER) Headquarters, and Office of Research and Development National Center for Environmental Assessment (ORD/NCEA). Lead Committee members generally have an active interest and recognized scientific expertise in metals or asbestos risk assessment.


Annual Reports

The TRW Lead Committee Annual Reports describing the actions taken by the Committee during the past year. The Annual Report presents the accomplishments and activities of the TRW Lead Committee, as well as a list of current and former TRW Lead Committee members.

If you have questions regarding the reports, please contact Michele Burgess at burgess.michele@epa.gov or 703-603-9003.

Accessing the Lead Committee

Regional and state risk assessors and project managers may submit written or electronic requests for Lead Committee review to the Lead Committee co-chairs:

If a legal concern for confidentiality exists, documents should be submitted to the Lead Committee through regional legal counsel.


Response from the Lead Committee

  • For a response to a site-specific request:

  • The time required for the Lead Committee to complete a site-specific review will depend on the nature of the request and the extent of the review requested (i.e., a brief consultation or a thorough, in-depth review). Because the Lead Committee meets bi-monthly via teleconference, a substantial request for assistance should be submitted at least two months prior to a desired response.

    The purpose of a Lead Committee review is to provide scientifically sound and consistent guidance to assist Regions and States in the appropriate use of the IEUBK model (or other risk assessment methodologies). The Lead Committee's written response and recommendations offer scientific support for the appropriate applications of the IEUBK model; however, Regions and States are neither required nor obligated to implement Lead Committee recommendations in site-specific risk assessments.

  • For a response to a technical question:

    Questions concerning the use of the IEUBK software may be submitted to the Technical Review Workgroup Technical Support.
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