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Microbiological and Chemical Exposure Assessment Staff

Thomas D. Behymer

Title: Deputy Division Director

EPA Division: Microbiological and Chemical Exposure Assessment Research Division

EPA Branch: Immediate Office

My primary research interest is the application of advanced mass spectrometric techniques (including GC/MS/MS and LC/MS/MS) to the measurement of contaminants of environmental interest.


  • Ph.D. analytical Chemistry, Indianan University, 1987
  • B.S. Chemistry, University of Cincinnati, 1981

Professional Experience:

  • Deputy Division Director, USEPA, ORD, NERL-MCEARD, Cincinnati, Ohio 2009-present
  • Acting Associate Division Director, USEPA, ORD, NERL-MCEARD, Cincinnati, Ohio 2008-2009
  • Chief, Chemical Exposure Research Branch, USEPA, ORD, NERL-MCEARD, Cincinnati, Ohio 1995-2008
  • Research Chemist, USEPA, EMSL, Cincinnati, Ohio 1987-1995
  • Research Associate, Indiana University, Bloomington, Indiana 1982-1987
  • Associate Instructor, Indiana University, Bloomington, Indiana 1981-1982
  • Research Assistant, University of Cincinnati, Cincinnati, Ohio 1980-1981
  • Research Assistant, Chemetrics, Inc., Calverton VA. at the University of Cincinnati, Cincinnati, Ohio 1980

Select Awards and Honors:

  • USEPA Bronze Medal for Commendable Service, for work in development, promulgation and implementation of UCMR 2, 2007
  • Exceptional/Outstanding ORD Technical Assistance to the Program Offices Award, for work in developing new procedures for detection and quantitation, 2008
  • USEPA, Superior Accomplishment Recognition Awards: 1995, 1998 - 2011
  • USEPA, STAA Award - Honorable Mention, 1993
  • University of Cincinnati, Honors in Chemistry, 1981
  • University of Cincinnati, Phi Lambda Upsilon Award, 1981

Select Presentations:

  • Dufour, AP, O Evans, L Wymer and T Behymer, Incidental Water Ingestion during Recreational Swimming. 17th Annual ISEA Conference, Co-sponsored by the International Society of Exposure Analysis and the Federal-State Toxicology and Risk Analysis Committee, Durham, North Carolina, 2007
  • Dufour, AP, L Wymer, T Behymer and O Evans, An Observational Study: Determination of the Volume of Water Ingested During Recreational Swimming Activities. Presented at U. S. EPA’s 2006 National Beach Conference, Niagara Falls, New York, 2006
  • Evans, O, L Wymer, T Behymer and A Dufour, How Much Water do Swimmer’s Drink? Presented at the World Aquatic Health Conference, Austin, Texas, 2006
  • Cantu, R, O Evans, FK Kawahara, ML Magnuson, JA Shoemaker, LJ Wymer, TD Behymer and AP Dufour, Simple Sample Cleanup Procedure and High-Performance Liquid Chromatographic Method for the Analysis of Cyanuric Acid in Human Urine. Presented at the 221st National Meeting of the American Chemical Society, San Diego, California, 2001
  • Behymer, TD, Quantitative Aspects of APCI and Particle Beam LC/MS Techniques for the Measurement of Compounds of Environmental Interest. Presented at the Michigan-Chicago-Milwaukee Mass Spectrometry Discussion Group, Detroit, Michigan and the Michigan Mass Spectrometry Discussion Group, East Lansing, Michigan (Invited speaker), 1994
  • Behymer, TD, TA Bellar, JS Ho and WL Budde, Quantitative Aspects of Particle Beam LC/MS in Environmental Analysis. Presented at the Pittsburgh Conference, New Orleans, LA (Invited speaker), 1992

Published & Presented Research (1999-Present)

Contact Info:

Microbiological and Chemical Exposure Assessment Research Division
National Exposure Research Laboratory
Office of Research and Development
U.S. Environmental Protection Agency
26 W. Martin Luther King Drive
Cincinnati, Ohio 45268
Telephone: 513-569-7392

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