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RBCA Risk Assessment

Risk-Based Corrective Action (RBCA) calculator based on ASTM E2081. Compare soil concentrations to US EPA Regional Screening Levels (RSLs) and calculate site-specific target levels.

Tier 1 Screening

Compare to RSL lookup tables

US EPA RSL Reference

ContaminantResidentialIndustrialBasis
Lead400800noncancer
Cadmium70800cancer
Arsenic0.683cancer
Mercury (elemental)1146noncancer
Chromium VI0.315.6cancer
Chromium III1200001500000noncancer

Source: US EPA RSL May 2024 | Units: mg/kg | Target Risk: 1E-6

Enter concentrations and click Calculate

Risk assessment results will appear here

About RBCA

Risk-Based Corrective Action (RBCA) is a tiered approach for evaluating contaminated sites based on ASTM E2081. It balances environmental protection with practical remediation while considering actual site conditions and exposure pathways.

Risk Targets

  • Cancer Risk:≤ 1 × 10⁻⁶
  • Hazard Index:≤ 1.0
  • Exposure Duration:26 years (residential)

References

  • • ASTM E2081-00 (2015)
  • • US EPA RSLs (May 2024)
  • • Thai PCD Soil Standards
  • • RAIS Toxicity Database