An official website of the United States government.

This is not the current EPA website. To navigate to the current EPA website, please go to This website is historical material reflecting the EPA website as it existed on January 19, 2021. This website is no longer updated and links to external websites and some internal pages may not work. More information »

Risk Assessment

Region 8: Risk Assessment Contacts

Region 8 (Mountains and Plains) Contacts

Technical Assistance

  • Unit Chief, Dan Wall, (, 303-312-6560

Human Health Risk Assessment

  • Drinking Water Toxicologist, Bob Benson (, 303-312-7070
  • Superfund Toxicologist, David Berry (, 303-312-6358
  • Superfund Toxicologist, Wendy O'Brien (, 303-312-6712
  • Superfund Toxicologist, Charlie Partridge (, 303-312-6094
  • Public Health Service, Radiation Risk Assessment, Steven Merritt (, 303-312-6146

Ecological Risk Assessment

  • Superfund Toxicologist, Brian Sanchez, (, 303-312-6659
  • Superfund Toxicologist, Andrew Todd, (, 303-312-7821
  • U.S. Fish & Wildlife Service Liaison, Robyn Blackburn (, 303-312-6663
  • U.S. Fish & Wildlife Service Liaison, Sherry Skipper (, 303-312-6148

General Information

Region 8 Risk Assessment Resources

Staying Connected

Top of Page

Some content on this page requires JavaScript in order to be viewed. If you wish to view content on this page, you must have JavaScript enabled.

Top of Page