Objective: To estimate the type and magnitude of exposures from the chemicals of potential concern that are present at or migrating from a site/facility.

• Characterization of the Exposure Setting

  • Characterize the physical environment
  • Identify potential landuse scenarios

• Identification of Exposure Pathways

  Components of a Complete Exposure Pathway are:

  1. Source (spill or leak)
  2. Release Mechanism (leaching or runoff)
  3. Environmental Medium/Transport Mechanism (air, water, or soil transporting the contamination)
  4. Exposure Point (location where receptor contacts media)
  5. Exposure Route(s) (how contaminant enters the body)
  • Ingestion
  • Dermal
  • Inhalation
  6. Receptor (individual or population exposed)
  • Residential
  • Industrial
  • Agricultural
  • Recreational
  

• Quantification of Exposure

  • Calculate chronic daily intake based on exposure pathways and dose per medium for contaminants of potential concern.

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