Overview
Risk3T is a human health risk assessment tool that supports a tiered approach for carcinogenic and non-carcinogenic risks and uses screening level calculations established by the United States Environmental Protection Agency for a variety of exposure routes and media types. Risk assessors can perform site-specific calculations, but also have access to an action level calculator and can generate action levels.
Risk3T is internal to EQuIS Professional but licensed separately. Risk3T functions seamlessly as a series of forms within EQuIS Professional, and provides users with an interactive workspace with direct access to existing action level tables and facility analytical data sets residing within EQuIS Schemas. The Risk3T ribbon has the following buttons:
Risk3T Settings – Provides interactive access to the various tables of setup values used for each function of Risk3T.
Site Specific Calculator – Opens the Risk3T forms for the function which:
•Selects the EQuIS sample/test/result data to be used in the risk calculations and automatically creates a list of analytes from those results.
•Calculates summary statistics (i.e., maximum detected concentration) for each analyte, for automated comparison to risk-based screening levels and action levels.
•Calculates Tier 2 (site-specific) screening levels and action levels after the appropriate selection of exposure pathways and the entry of site-specific values for the modeling input parameters.
•Provides formatted Risk Assessment reports for the presentation of all the above information.
•Saves the selected action levels to the EQuIS DT_ACTION_LEVEL and DT_ACTION_LEVEL_PARAMETER tables for use in other EQuIS reports.
Users have the option to calculate site-specific action levels without a full risk assessment report.
Tier 1 Action Level Calculator – Opens the Risk3T forms for the function which calculates Tier 1 EQuIS Action Levels with all the chemicals in the selected Chemical Toxicity/Properties table from a regulatory agency.
Lookup Action Level Generator – Opens the Risk3T forms for the function which generates EQuIS Action Levels from Pathway-Specific Lookup Tables from regulatory agencies.
Installation
The Risk3T.Forms.dll file must be present in the EQuIS Professional installation folder, and the Risk3T Schema must have been applied to the EQuIS database for Risk3T to be enabled. The necessary files are copied to the correct folders when the Risk3T option is selected during the EQuIS Professional installation process. The EQuIS Professional Installer can be run again to add Risk3T to an existing installation.
Reference values
After Risk3T has been installed and the Risk3T Schema has been applied to the database, Risk3T reference values for input parameter sources as well as chemical property and toxicity data must be added to the database. Example Risk3T EDDs (Microsoft Excel files) are provided to serve as a starting point (Risk3T-refvals_EPA_11_2018_HQpt1.xlsx and Risk3T-refvals_TCEQ_2018.xlsx). These input parameter sources can be modified later within Risk3T. The next step is to load the Risk3T EDD(s) to the EQuIS database using EDP.
1.On the EQuIS Professional Home ribbon, select the EDP button.
2.Click the Format button and select Risk3T-refvals.zip from the installed Risk3T files, typically located by default in \Programs Files\EarthSoft\EQuIS\Formats\Risk3T.
3.Click the EDD button and select each of the desired Risk3T EDDs supplied in that same folder.
4.Create and Commit the EDD.
Opening Risk3T
1.Open EQuIS Professional.
2.Select the Risk3T license (on the Decision Support license tab).
3.Select the Decision Support ribbon.
4.Click the desired Risk3T option.
The full Risk3T Manual is available in PDF format here.