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Waste and Cleanup Risk Assessment

RCRA Risk Assessment: Human Health: Risk Characterization

View resources related to this topic from other Waste and Cleanup Risk Assessment Programs:
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Chemical Accident Prevention

Federal Facilities Restoration and Reuse

Underground Storage Tanks

Resource and Conservation Recovery Act


Additional RCRA Information:

Corrective Action

Vapor Intrusion


Hazardous Waste Identification

Industrial Waste

In Risk Characterization, the information from Hazard Identification, Exposure Assessment, Dose-Response Assessment are summarized and integrated into quantitative and qualitative expressions of risk. To estimate potential noncarcinogenic effects, comparisons are made between projected intakes of substances and toxicity values; to estimate potential carcinogenic effects, probabilities that an individual will develop cancer over a lifetime of exposure are determined from projected intakes and chemical-specific dose-response information. Major assumptions, scientific judgments, and to the extent possible, estimates of the uncertainties embodied in the assessment are also presented.



  1. Integrated Exposure Uptake Biokinetic Model for Lead in Children (IEUBK)
    The Integrated Exposure Uptake Biokinetic Model for Lead in Children (IEUBK) attempts to predict blood-lead concentrations (PbBs) for children exposed to lead in their environment. The model allows the user to input relevant absorption parameters (e.g., the fraction of lead absorbed from water) as well as intake and exposure rates.

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