Robert A. Howe, Tetra Tech EM Inc.
Mr. Howe has 25 years of experience in environmental sciences and 20 years of experience in implementation of environmental restoration projects. Mr. Howe is one of Tetra Tech's technical leads in support of EPA OSTRI's technical support centers. Under three contracts with EPA Headquarters OSTRI, he has developed extensive training materials and supported projects nationwide. At various levels in management, Mr. Howe has played a major role in cleanup and closure at several hundred hazardous waste sites ranging in size from small brownfields sites to some of the largest Superfund and brownfields property developments in the U.S.

Carlos Pachon, Technology Innovation and Field Services Division, Office of Superfund Remediation and Technology Innovation, EPA
In addition to responsibilities such as tracking and reporting on the use of remediation technologies in Superfund, Mr. Pachon manages the Brownfields and Land Revitalization Technology Support Center. He is currently engaged in helping define EPA Office of Solid Waste and Emergency Response's green remediation strategy. In recent years he also worked as a special assistant to the EPA Administrator and with the United States Trade Representative conducting environmental reviews of free trade agreements. Previously his duties also included the development and delivery of key training Superfund courses, such as Remedial Design and Remedial Action for Remedial Project Managers. He has a BS from Colorado State University in Watershed Management and graduate degrees in environmental and business management from Duke University and a Georgetown respectively.

Dr. Tom Purucker, Ecosystems Research Division, National Exposure Research Laboratory, Office of Research and Development, EPA
Dr. received his PhD in Ecology and Evolutionary Biology in 2006 from the University of Tennessee. He is a post-doctoral ecologist for the EPA in the Ecosystems Research Division of the National Exposure Research Laboratory in Athens, Georgia and also is an adjunct faculty member at Gainesville State College. Particular areas of interest include spatial statistical applications to environmental contamination problems, exposure assessment development, fate and transport of contaminants, ecological population models, and applications of uncertainty analysis to these areas in a decision-making context.