The Toxicity Values used in the Risk calculations are current as of May 2007

Introduction

This risk assessment tool calculates doses and risks from exposure concentrations. Users of this tool can calculate the doses and risks by either supplying a data set of concentrations (Limited Access) or selecting chemicals and hand-entering exposure concentrations. In addition, to use this tool the land use and exposure combinations for a site must be selected and a sort order for the final output must be chosen. After selecting the land use and exposure combinations, the user may modify exposure parameters within the dose equations to develop site-specific doses and risks or may utilize the default exposure parameters provided. The results of these choices can be output to the screen or to a comma delimited file.

The dose equations utilized by this tool are based on guidance in Risk Assessment Guidance for Superfund: Volume 1, Human Health Evaluation Manual (Part A - Baseline Risk Assessment) (RAGS, Part A), Risk Assessment Guidance for Superfund: Volume 1, Human Health Evaluation Manual (Part B - Development of Risk-based Preliminary Remediation Goals) (RAGS, Part B)^[1], and Radiation Site Cleanup Regulations: Technical Support Document for the Development of Radiation Cleanup Levels for Soil (EPA 402-R-96-011 A).

In addition, this tool contains some equations developed for assessment of sites on the Oak Ridge Reservation in Oak Ridge, Tennessee and approved by EPA, Region 4. (See special cases for a complete description of what may be specific to the Oak Ridge Reservation. Additional discussion of these special cases and the strategy used for risk assessment at the Oak Ridge Reservation is presented in Guidance for Conducting Risk Assessments and Related Risk Activities for the DOE-ORO Environmental Management Program  [BJC/OR-271].)

It is suggested that all users read the special cases before viewing the equations.

Tutorial

Risk Equations (by land use and media)

• CONSTRUCTION WORKER/EXCAVATION LAND USE; Exposure to Contaminants in Soil
• INDUSTRIAL LAND USE (INDOOR AND OUTDOOR WORKER); Exposure to Contaminants in Soil
• INDUSTRIAL LAND USE (INDOOR AND OUTDOOR WORKER); Exposure to Contaminants in Groundwater
• RECREATIONAL LAND USE; Exposure to Contaminants in Soil
• RECREATIONAL LAND USE; Exposure to Contaminants in Water
• RESIDENTIAL LAND USE; Exposure to Contaminants in Soil
• RESIDENTIAL LAND USE; Exposure to Contaminants in Water
• AGRICULTURAL LAND USE; Exposure to Contaminants in Soil, Groundwater and Homegrown Produce

References

How Can I Calculate Risks?

• Enter analytes and concentrations by hand to have risk calculated.