Risk Evaluation Resources
DEQ’s procedures for evaluating human health risks are outlined in the Tier 1/Tier2 flowchart. Contact the appropriate oversight program with any questions.
Initial screening (Tier 1) using the tables and links below will help determine if site contaminant concentrations meet unrestricted use standards.
A risk calculator (Tier 2) is provided to quantify human health risks when multiple contaminants are present and when conditions justify using site-specific input parameters.