You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.
Current Methodology and User's Manual
The Methodology Document for RSEI Model Version 2.3.1, May 2012 (PDF) (88 pp, 477K) describes data and methods used in RSEI modeling.
The User's Manual for RSEI Model Version 2.3.1, May 2012 (PDF) (172 pp, 2.9 MB) explains all of the functions of the model, the data used, and contains tutorials to walk the new user through common RSEI tasks. A more general overview of the model can be found in the RSEI Fact Sheet (PDF) (2 pp, 52K).
There are also six Technical Appendices that accompany these two documents and provide additional information on the data used in the model. The Appendices are as follows:
Appendix A (PDF) (36 pp, 179K) - Listing of All Toxicity
Weights for TRI Chemicals and Chemical Categories
Technical Appendix B (PDF) (88 pp, 1.2MB) - Physicochemical Properties for TRI Chemicals and Chemical Categories
Technical Appendix C (PDF) (10 pp, 56K) - Derivation of Model Exposure Parameters
Technical Appendix D (PDF) (18 pp, 83KB) - Locational Data for TRI Reporting Facilities and Off-site Facilities
Technical Appendix E (PDF) (19 pp, 83KB) - Derivation of Stack Parameter Data
Technical Appendix F (PDF) (7 pp, 29K) - Summary of Differences Between RSEI Data and the TRI Public Data Release
The Toxicity Weighting Spreadsheet v2.3.1 spreadsheet (XLS) (796K) shows the RSEI toxicity weights and their sources.
In addition, there are two documents containing background and supporting information. Analyses Performed for the Risk-Screening Environmental Indicators (PDF) (181 pp, 1.6 MB) contains three parts:
- Part A describes the result of a ground-truthing analyses performed to determine the accuracy of the air pathway modeling;
- Part B contains additional analyses performed on the air pathway to determine optimal modeling parameters; and
- Part C describes the results of an analysis of a Standard Industrial Classification (SIC) code-based stack parameter data.
Developing the Risk-Screening Environmental Indicators (PDF) (127 pp, 757K) describes the development of the RSEI model, and outlines options that were considered for several important aspects of the method.
Looking for older documentation? Browse the Documents Archive.