Exposure Scenario

{
  "id": "MLC-T-ENV-010504",
  "term": "Exposure Scenario",
  "field": "Environment",
  "definition": "1. A set of assumptions concerning how an exposure takes place, including assumptions about the exposure setting, stressor characteristics, and activities of an organism that can lead to exposure.\n\n2. A set of conditions or assumptions about sources, exposure pathways, concentrations of toxic chemicals and populations (numbers, characteristics and habits) which aid the investigator in evaluating and quantifying exposure in a given situation.\n\n3. A set of facts, assumptions, and interferences about how exposure takes place that aids the exposure assessor in evaluating estimating, or quantifying exposures.\n\n4. A set of assumptions concerning how an exposure may take place, including exposure setting, stressor characteristics, and activities that may lead to exposure.\n\n5. A combination of facts, assumptions, and inferences that define a discrete situation or activity where potential exposures may occur (USEPA, 1997a). OPP uses this term as a synonym for “source.”\n\n6. A series of assumptions based on factors such as land use and human activities at a site. The major assumptions inherent to a scenario aside from land use, are the frequency and duration of exposure to a contaminant. These exposure assumptions are assigned numerical values along with assumptions regarding exposure pathways and estimate of exposure point concentrations to calculate potential intakes of a contaminant by a receptor. Typical exposure scenarios are residential, commercial/industrial, and recreational.\n\n7. A set of conditions or assumptions about sources, exposure pathways, concentrations of toxic chemicals, and populations (numbers, characteristics and habits) which aid the investigator in evaluating and quantifying exposure in a given situation. [EPA 2004]\n\n8. A set of conditions or assumptions about sources, exposure pathways, amount or concentrations of agent(s)involved, and exposed organism, system or (sub) population (i.e., numbers, characteristics, habits) used to aid in the evaluation and quantification of exposure(s) in a given situation. [IPCS/OECD 2004]\n\n9. A set of assumptions concerning how an exposure may take place, including exposure setting, stressor characteristics, and activities that may lead to exposure. [EPA 1998a]\n\n10. A combination of facts, assumptions, and inferences that define a discrete situation where potential exposures may occur. These may include the source, the exposed population, the time frame of exposure, microenvironment(s), and activities. Scenarios are often created to aid exposure assessors in estimating exposure. [IPCS 2004]\n\n11. A set of facts, assumptions, and inferences about how exposure takes place that aids the exposure assessor in evaluating o r quantifying exposure.\n\n12. A set of facts, assumptions, and inferences about how exposure takes place that aids the exposure assessor in evaluating or quantifying exposure.",
  "subject": "Science and research",
  "references": [
    "Waste and Cleanup Risk Assessment Glossary",
    "Drinking Water Technical & Legal Terms; EPA 2004",
    "Exposure Factors Handbook: Glossary",
    "EPA 1998a",
    "EPA General Principles For Performing Aggregate Exposure And Risk Assessments: Glossary at http://www.epa.gov/oppfead1/trac/science/aggregate.pdf",
    "DOE Office of Legacy Management Glossary",
    "Thesaurus of Terms Used in Microbial Risk Assessment",
    "ExpoBox Terminology",
    "EPA ExpoBox Terminology"
  ],
  "url": "https://mlchart.com/terminology/environment/exposure-scenario/"
}