Dr. Roger D. Lewis is a Professor Emeritus at Saint Louis University School for Public Health and Social Justice where he has served for twenty-seven years. Dr. Lewis served as division head and later as Chair of the Environmental and Occupational Health Department.

Dr. Lewis also directed the Environmental Health Research Laboratory, located at the SLU medical school, for twenty years. His laboratory research has included projects such as: removal of lead and allergens from residential surfaces, growth and eradication of fungi and dust mites from carpets, resuspension of aerosols from surfaces, use of GIS and mathematical models for targeting lead remediation in communities, development of chemi-fluorescent lead sensors, and development of portable water filters for prevention of diarrheal disease. While at SLU, he managed St. Louis’s airborne radiation detection station for the US Environmental Protection Agency.

As a board-certified industrial hygienist (CIH), Dr. Lewis has over forty-years’ experience in industry and consulting in areas of recognition, evaluation, and control of occupational and environmental health hazards. Dr. Lewis became a Fellow of the American Industrial Hygiene Association in 2015. Two of his publications have received national awards from the Indoor Air Quality Committee of the American Industrial Hygiene Association. Dr. Lewis was co-senior editor of the second edition (2021) of the “Role of the Industrial Hygienist in a Pandemic”, published by the AIHA.

Dr. Lewis received his Ph.D. in Environmental Health from the Bloomberg-Johns Hopkins School Public Health,1995, Master of Science in Industrial Hygiene from University of Central Missouri, 1980, and Bachelor of Science in Biology from the University of Kansas, 1976.

Lee G. Sobotka is a Professor of both Chemistry and Physics at Washington University in St. Louis. His expertise spans nuclear and radiochemistry and nuclear physics. He has published about 225 papers in these fields and has studied all forms of radioactivity in his near 40-year career. Sobotka has received the Glenn T. Seaborg award for Nuclear Chemistry from the American Chemical Society and is a fellow of the American Physical Society. He received his PhD from the University of California at Berkeley in 1982, came to Washington University in 1984, and has served on the university’s radiation safety committee since that time.

Marco Kaltofen, Ph.D., PE (Civil, MA), C. NSE

Dr. Kaltofen is a licensed Massachusetts civil engineer who specializes in environmental investigations involving chemical, petroleum and nuclear accidents and releases. He graduated from Boston University (general engineering and chemistry) and also graduated from Worcester Polytechnic Institute in 2015, with an MS in Environmental Engineering and PhD in Civil Engineering. His research publications are primarily in the field of forensic nuclear science, with a focus on Environmental Justice issues and Nuclear Nonproliferation.

Marco Kaltofen is a bilingual Indonesian-American immigrant who has studied industrial accidents and natural disasters including Hurricane Katrina in New Orleans, the BP oil spill in the Gulf of Mexico, the Fukushima meltdowns in Japan, war-driven petroleum spills in Iraq, an oil-contaminated scientific base in Antarctica, radioactively-contaminated wildlife from Chernobyl, and nuclear reactor complexes ravaged by wildfire in Santa Susana near Los Angeles, CA; Hanford in Washington, and Los Alamos in New Mexico.

The Army Corps of Engineers will provide background and updates on Jana School testing methods and results/risk assessment computer models on radiation exposure.