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Exposure Pathway Calculator

Calculate Average Daily Dose (ADD) and Lifetime Average Daily Dose (LADD) for soil contamination through multiple exposure pathways. Based on US EPA RAGS methodology.

Exposure Input

Enter contamination and receptor details

Receptor Type

Exposure Pathways

Exposure Parameters

Body Weight:70 kg
Exposure Freq:350 d/yr
Exposure Duration:26 years
Soil Ingestion:100 mg/day
Skin Area:5700 cm²
Inhalation Rate:20 m³/day

Enter parameters and click Calculate

Exposure assessment results will appear here

About Exposure Assessment

Exposure assessment quantifies the magnitude, frequency, and duration of human contact with contaminants. The Average Daily Dose (ADD) is used for non-cancer risk assessment, while the Lifetime Average Daily Dose (LADD) is used for cancer risk assessment (averaging over 70-year lifetime).

References

  • • US EPA Risk Assessment Guidance for Superfund (RAGS) Part A
  • • US EPA Exposure Factors Handbook (2011)
  • • ASTM E1739 Standard Guide for Risk-Based Corrective Action
  • • Thai PCD Risk Assessment Guidelines