Dr. Troast Resume

Scientific Consulting Services, March 2005 – Present

2008-2017. Dr. Troast created Troast Environmental Consulting (TEC), LLC.in 2008. He works independently and has available a cadre of associates formerly the USEPA, to provide a complete environmental assessment focusing on hazardous wastes, site remediation, lead, asbestos, mold, and waste water issues. Dr. Troast and associates provide litigation services that include assessment of chemical and environmental hazards, expert opinion reports and testimony. Dr. Troast has provided expert opinions for establishing the hazards and risks of exposure to lead and other environmentally toxic metals such as arsenic in adults and children, the contaminants in coal ash, asbestos toxicity, radon exposure, PCB contamination, diesel, benzene, and indoor air contaminants from chemical and microbial sources.

2009-10. Dr. Troast served as Program Director and environmental scientist for Jobe Consulting Group. Dr. Troast served as senior toxicologist for the reviews. 

2005-2008. Dr. Troast was senior scientist and regulatory affairs specialist on USAID contract No. GS-10F-0112K ( Jordan Industrial Manifest Program) assisting leaders of the Ministry of the Environment and other Ministries within the Kingdom of Jordan in assessing the movement of hazardous waste within the Kingdom, researching methods for the destruction of hazardous waste, designing a reportable quantities system for tracking hazardous waste, and designing analytical laboratory practices and a GLP manual for the Royal Scientific Society (RSS) of Jordan to use in providing oversight for the Ministry of the Environment (MOEnv). Dr. Troast was the representative for the project and reported directly to the Ministerial working group and to the leadership of the RSS when critical junctures were reached. His reports incorporated three major influences of international hazardous materials control, the European Union standards, the WHO guidance principals and the US EPA rules affecting hazardous materials transfer, disposition and safety while maintaining harmony with appropriate ISO 14000 guidance documents. Dr. Troast provided outreach assistance as needed and helped develop working models of critical agreements to facilitate the transfer of information between Ministries charged with the control of hazardous waste within the Kingdom.

2005-2007. Dr. Troast served as a consulting scientist/toxicologist with the Syracuse Research Corp. located in Syracuse, New York. This was a part-time position to assist in developing new avenues for review of toxicology studies in light of changes in testing protocols.

US Environmental Protection Agency, Office of Emergency and Remedial Response (OERR), Washington, DC, 1990 - 2005

Dr. Troast was a senior scientist for the Remedial cleanup (Superfund) program. He chaired the Technical Review Workgroup for Lead and the Technical Review Workgroup for Asbestos. During his tenure as Chairman, he organized and chaired several national meetings which brought together Federal and State agencies to discuss lead and asbestos toxicity and exposure characteristics. Dr. Troast was responsible for and participated in the preparation of guidance documents on risk and exposure characteristics of lead and asbestos released during years 1999-2005.

Dr. Troast was responsible for the release of the first Integrated Exposure Uptake and Biokinetic Model (IEUBK) used by the USEPA to assess the risks from environmental lead exposure to children. The IEUBK allows for the estimation of a populations risk based on exposures of lead in air, soil, water, food, dust, and other external factors (e.g. lead based paint).

Dr. Troast also participated in the development of the Adult Lead Model which is used for estimating body burden of lead in adults.

Dr. Troast was also part of a team developing in vitro methods for establishing exposure parameters for metals including lead.

Dr. Troast assisted in laboratory accreditations to insure that laboratories followed required protocols under laboratory accreditation guidelines.

Dr. Troast was a member of the Genomic Taskforce and the Regulatory Workgroup and assisted in developing regulatory guidance for interpreting genomic-based toxicological data and had these data published and adopted by EPA. He was also a member of the ILSI Health and Environmental Sciences Institute (HESI) work group. This group, comprised of comprised of leading industry and Federal scientists, worked on harmonizing scientific study requirements.

US Environmental Protection Agency, Office of Pesticides and Toxic Substances, Chemical Testing Branch (TSCA), Washington, DC, 1980 - 1989

Dr. Troast had oversight for the analysis of chemical and toxicological data supplied by industry using the authorities of TSCA sections 4, 5 and 8 to determine whether further data was required to fully understand and characterize the potential toxicity of chemicals. These assessments lead to the chemical industry improving test methods for oral, dermal and inhalation routes of chemical exposure. Among the changes were establishment of standards for GLP and QA/QC. The improvements allowed the harmonization of testing under the Toxic Substances Control Act as well as testing required by OECD.

Legislative Fellow, 1987 - 1988

Dr. Troast was selected by the US Office of Personnel Management to serve as a LEGIS Fellow for the second session of the 97th Congress. In this capacity Dr Troast served with Senator Gordon Humphrey (R-NH) as a legislative aide focusing on environmental legislation pending before the US Senate.

US Environmental Protection Agency, Office of Pesticide Programs (FIFRA), Washington, DC, 1973 - 1980

Dr. Troast was a toxicologist/microbiologist and risk assessor for two departments within the Office off Pesticides.


Lord Fairfax Community College (Warrenton, VA) and Germanna Community College (Fredericksburg, VA)
George Mason University, Manassas, VA Guest Lecturer for Genomics and Bioinformatics,


  • Society of Toxicology – Member of NCAC Metals Program Development Group
  • American Association for the Advancement of Science
  • American Chemical Society
  • Environmental Information Association
  • Society of Environmental Toxicology and Chemistry – Member of Metals Advisory Group


  • US EPA Silver Medal for Superior Service, 2002
  • US EPA Bronze Medal for Meritorious Service, 1982, 1987, and 1991
  • US EPA Project Management Excellence Award, 1993
  • LEGIS Fellowship, 1987-1988
  • US EPA Special Science Achievement Award, 1983, 1987, 1990, 1992, and 1997


  • Troast R and Willett JD. 2008. Using Caenorhabditis elegans as a Tool for Identifying Environmental Lead Contamination: A new endpoint for relating exposures to lead risk. Environmental Bioindicators 3:68-73.
  • Troast R, Willett JD, and Sudama G. 2007. Identification of an Exposure Based Biomarker for Lead using Caenorhabditis elegans. Proceedings of the Third International Conference on Environmental Science and Technology V2:419-426.
  • Gallagher K, Benson WH, Brody M, Fairbrother A, Hasan J, Klaper R, Lattier D, Lundquist S, McCarroll N, Miller G, Preston J, Sayre P, Seed J, Smith B, Street A, Troast R, Vu V, Reiter L, Farland W, and Dearfield K. 2006. Genomics: Applications, Challenges, and Opportunities for the U.S. Environmental Protection Agency. Human and Ecological Risk Assessment 12(3):572-590.
  • Maddaloni M, Ballew M, Diamond G, Follansbee M, Gefell D, Goodrum P, Johnson M, Koporec K, Khoury G., Luey J, Odin M, Troast R, Van Leeuwen P, and Zaragoza L. 2005. Assessing Lead Risks at Non-Residential Hazardous Waste Sites. Human and Ecological Risk Assessment 11(5): 967-1003.
  • Lorenzana RM, Troast R, Klotzbach JM, Follansbee MH, and Diamond GL. 2005. Issues Related to Time Averaging of Exposure in Modeling Risks Associated with Intermittent Exposures to Lead. Risk Analysis 25(1):169-178.
  • Troast R. 2005. When Science Crosses Politics, I: The Case of Naturally Occurring Asbestos. J. Environ. Health 67(9): 84. [Author reply]
  • Lorenzana RM, Troast R, Mastriano M, Follansbee MH, and Diamond GL. 2003. Lead Intervention and Pediatric Blood Lead Levels at Hazardous Waste Sites. J. Toxicol Environ Health A 66:871-893.


  • Willett JD, Troast R, and Sudama G. 2004. Probing Mechanisms of Toxicity through Metabolic Profiling: Lead and Caenhorabditis elegans. Presented at International Conference on Genomics and Science, Cyprus, October 2004.
  • Troast R and Willett JD. 2004. A New Technique for Assessing Lead Bioavailability. Presented at Fourteenth Annual Conference on Soils, Sediments and Water, Association for Environmental Health and Science, San Diego, CA, March 2004.
  • Willett J, Troast R, and Sudama G. 2003 Metabolic Profiling and the Mechanisms of Toxicity: Lead and Caenhorabditis elegans. Presented at Mechanisms of Genotoxicity conference, Princeton University.
  • Troast R and Willett JD. 2002. Lead-Induced Physiologic Changes in Caenhorabditis elegans. Presented at Medical College of Virginia Genotoxicity Symposium, Richmond, VA, May 2002.
  • Troast R et al. 2006. The Use of Genomic Markers in Caenorhabditis elegans as bio-indicators for environmental lead exposure: A replacement for current in vivo and in vitro systems? Presented at Tenth International Conference on Biomarkers, Baltimore, MD, April 2006.
  • Troast, R 2007. Identification of a Exposure Based Biomarker for using C. elegans. Presented at the Third International Conference on Environmental Science and Technology, Houston, Tx July 2007.
  • Troast, R 2013. The Use of the Integrated Exposure Uptake and Biokinetic Model as a Predictive Tool for Lead Based Paint Risk Assessments. Presented at the Annual Meeting of the Environmental Information Association, Crystal City, Va. March 2013.
  • Troast, R. 2017 Lead – A Continuing Hazard. Presented as part of the Shepherd University President’s Lecture Series. Feb. 2018

EPA Guidance Documents and Reports co-authored

Overview of the IEUBK Model for Lead in Children [NTIS #PB99-9635-8, OSWER #9285.7-31]

IEUBK Model Mass Fraction of Soil in Indoor Dust (MSD) Variable

[EPA #540-F-00-008, OSWER #9285.7-34] (June 1998)

IEUBK Model Bioavailability Variable [EPA #540-F-00-006, OSWER #9285.7-32]

IEUBK Model Soil/Dust Ingestion Rates [EPA #540-F-00-007, OSWER #9285.7-33

TRW Recommendations for Sampling and Analysis of Soil at Lead (Pb) Sites [EPA #540-F-00-010, OSWER #9285.7-38] (April 2000)

TRW Recommendations for Performing Human Health Risk Analysis on Small Arms Shooting Ranges [OSWER #9285.7-37] (March 2003)

Superfund Lead-Contaminated Residential Sites Handbook [0SWER #9285.7-50] (August 2003)

Assessing Intermittent or Variable Exposures at Lead Sites [0SWER #9285.7-76] (November 2003)

XRF (X-ray fluorescence) Answers to Frequently Asked Questions (May, 2004)

Estimating the Soil Lead Concentration Term for the Integrated Exposure Uptake Biokinetic (IEUBK) Model [OSWER #9200.1-78] (September 2004)