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Health Assessment and Contaminants: Workshop on pathways of human exposure

Health Assessment and Contaminants: Workshop on pathways of human exposure. Juliana Grant, MD MPH Agency for Toxic Substances and Disease Registry Regional Representative - Alaska. Outline. Introduction to health assessment and pathways of human exposure Case study

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Health Assessment and Contaminants: Workshop on pathways of human exposure

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  1. Health Assessment and Contaminants: Workshop on pathways of human exposure Juliana Grant, MD MPH Agency for Toxic Substances and Disease Registry Regional Representative - Alaska

  2. Outline • Introduction to health assessment and pathways of human exposure • Case study • Applying exposure pathways • Additional resources

  3. Public Health Assessment • ATSDR term for process of evaluating environmental contaminants and determining whether they are impacting human health • Multi-step process • Includes evaluating pathways of human exposure

  4. Are humans exposed? • Gold ore smelter • Mercury released in smoke • Acidic wastewater released into river

  5. Pathway of Human Exposure • Describes how people come into contact with contaminants from a specific source • Useful for • Understanding exposures • Doing environmental sampling • Developing interventions

  6. Example pathways Breathing Smoke Air Nearby residents No one exposed No one drinks from it or swims in it Waste water River

  7. Parts of pathways

  8. Parts of pathways

  9. Example parts of pathways

  10. Case study: Open dump site • What exposures from the Toksook Bay dump site are you most concerned about?

  11. Applying exposure pathways • Clear description of potential exposures • Which contaminants are most concerning • Examine how contaminants change as they move through environment • Environmental sampling • Where, When and What to sample

  12. Applying exposure pathways • Interventions • Remove any part of pathway and exposure stops • Information gaps • What do we not know? • Analyzing environmental data • If exposure pathway is complete, is the exposure dangerous?

  13. More information • ATSDR website (www.atsdr.cdc.gov) • Public Health Assessment Guidance Manual • ToxProfile • ToxFAQs

  14. Thank you! Juliana Grant 907-271-4073 jgrant@cdc.gov www.atsdr.cdc.gov

  15. Dump site example Smoke from burning School children Nearby school Breathing Complete pathway

  16. Dump site example Smoke from burning Only burn when wind blowing away from school Incomplete pathway

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