Jump to main content.


Documents Archive

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.

The documents on this page describe the evolution of RSEI over the past ten years. The Reports listed below were released to document various aspects of the model. The Methodology documents describe the data and methods used to calculate RSEI results, and the User's Manuals describe how to use the model interface. All of the documents refer to the RSEI model as implemented at the time, and may not reflect the current version. Please see Documents for the most recent supporting documentation.

Note: EPA no longer updates this information, but it may be useful as a reference or resource.


Note that some documents refer to the "TRI Relative Risk-Based Environmental Indicators," the original project name.

On this page:

Reports

  1. Toxics Release Inventory Relative Risk-Based Environmental Indicators: Interim Toxicity Weighting Summary Document, June 1997 (PDF) (252 pp, 3.5 MB)
    This report, prepared for the June 1997 SAB review, discusses the methods used to derive toxicity weights from published toxicity values and from dose-response data found in the literature. In response to comments received from the SAB, changes were made to the toxicity weighting methodology used in the Indicators model. Data from the Office of Pesticide Programs was approved for inclusion and the algorithms used to assign toxicity weights have been modified to proportionally reflect the toxicity values themselves. However, the basic philosophy supporting the methodology has not changed.

  2. Ground-Truthing of the Air Pathway Component of OPPT's Risk-Screening Environmental Indicators Model, October 1998 (PDF) (89 pp, 781K)
    This draft report describes OPPT's "ground-truthing" analysis which compares results of the air model component of the Indicators model to results obtained from a state air dispersion model used for regulatory purposes.  The comparison evaluated the impact of using a combination of median data and generic assumptions in the Indicators model as opposed to using more site-specific data.

  3. Estimates of Stack Heights and Exit Gas Velocities for TRI Facilities in OPPT's Risk-Screening Environmental Indicators Model, June 1999 (PDF) (55 pp, 1.1 MB)
    This report describes the Agency's improvements to the accuracy of the Indicators model through incorporation of facility-specific stack heights and exit gas velocities where available, or through estimation of stack heights and exit gas velocities by facilities' Standard Industrial Classification (SIC) codes.

Top of page

Methodology Documents

The RSEI model has undergone a series of changes due to the Agency's responses to reviews and comments by EPA's Science Advisory Board (SAB) and testers.

  1. Toxics Release Inventory Relative Risk-Based Environmental Indicators: Summary of Comments Received on the Draft 1992 Methodology and Responses to Comments, May 1997 (PDF) (90 pp, 301K)
    This document contains general comments on the original Indicators methodology, the toxicity weighting, the chronic ecological indicator and other issues. OPPT's responses and proposed changes are also discussed.

  2. Toxics Release Inventory Relative Risk-Based Environmental Indicators Methodology, June 1997 (PDF) (287 pp, 5.4 MB)
    This report, prepared for the June 1997 SAB review, explains how the proposed Indicators are constructed, and includes discussions of the conceptual methodology, data sources, and the computational approach.

  3. Methodology Document for RSEI Model Version 2.1, January 2004 (PDF) (106 pp, 836 KB)
    This methodology document accompanies version 2.1 of the Risk-Screening Environmental Indicators model.

  4. Methodology Document for RSEI Model Version 2.1.2, August 2004 (PDF) (107 pp, 820 KB)
    This methodology document accompanies version 2.1.2 of the Risk-Screening Environmental Indicators model.

  5. Methodology Document for RSEI Model Version 2.1.5, October 2007 (PDF) (87 pp, 508 KB)
    This methodology document accompanies version 2.1.5 of the Risk-Screening Environmental Indicators model.

Top of page

User's Manuals

  1. User's Manual for OPPT's Risk-Screening Environmental Indicators Model: Version 1.0, November 1999 (PDF) (169 pp, 3.9 MB)
    This manual describes the Indicator methodology, operations of the computer model and the step-by-step processes to perform them, and pre-run queries available with the model.

  2. User's Manual for RSEI Model Version 2.1, December 2002 (PDF) (182 pp, 1.8 MB)
    This manual accompanies version 2.1 of the Risk-Screening Environmental Indicators model.

  3. Technical Appendices for Version 2.1, December 2002
    These documents support the User's Manual and the Methodology Document for RSEI Version 2.1, and provide additional information on the data used in the model:
    Technical Appendix A (PDF) (37 pp, 722K) - Listing of All Toxicity Weights for TRI Chemicals and Chemical Categories
    Technical Appendix B (PDF) (97 pp, 2.2 MB) - Physicochemical Properties for TRI Chemicals and Chemical Categories
    Technical Appendix C (PDF) (14 pp, 90K) - Derivation of Model Exposure Parameters
    Technical Appendix D (PDF) (31 pp, 184K) - Locational Data for TRI Reporting Facilities and Off-site Facilities
    Technical Appendix E (PDF) (18 pp, 87K) - Derivation of Stack Parameter Data
    Technical Appendix F (PDF) (7 pp, 83K) - Summary of Differences Between RSEI Data and TRI Public Data Release

  4. RSEI Version 2.1 Distribution Package (PDF) (9 pp, 70K) - Information distributed to users in technical release of RSEI Version 2.1

  5. User's Manual for RSEI Model Version 2.1.2, August 2004 (PDF) (182 pp, 2.1 MB)

  6. Technical Appendices for Version 2.1.2, August 2004
    These documents support the User's Manual and the Methodology Document for RSEI Version 2.1.2, and provide additional information on the data used in the model:
    Technical Appendix A (PDF) (39 pp, 718K) - Listing of All Toxicity Weights for TRI Chemicals and Chemical Categories
    Technical Appendix B (PDF) (97 pp, 2.2 MB) - Physicochemical Properties for TRI Chemicals and Chemical Categories
    Technical Appendix C (PDF) (14 pp, 90K) - Derivation of Model Exposure Parameters
    Technical Appendix D (PDF) (35 pp, 188K) - Locational Data for TRI Reporting Facilities and Off-site Facilities
    Technical Appendix E (PDF) (19 pp, 91K) - Derivation of Stack Parameter Data
    Technical Appendix F (PDF) (7 pp, 30K) - Summary of Differences Between RSEI Data and TRI Public Data Release

  7. User's Manual for RSEI Model Version 2.1.2, August 2004 (PDF) (182 pp, 2.1 MB)

  8. Technical Appendices for Version 2.1.5, October 2007
    These documents support the User's Manual and the Methodology Document for RSEI Version 2.1.5, and provide additional information on the data used in the model:
    Technical Appendix A (PDF) (36 pp, 130K) - Listing of All Toxicity Weights for TRI Chemicals and Chemical Categories
    Technical Appendix B (PDF) (87 pp, 518 KB) - Physicochemical Properties for TRI Chemicals and Chemical Categories
    Technical Appendix C (PDF) (10 pp, 50K) - Derivation of Model Exposure Parameters
    Technical Appendix D (PDF) (18 pp, 62K) - Locational Data for TRI Reporting Facilities and Off-site Facilities
    Technical Appendix E (PDF) (19 pp, 62K) - Derivation of Stack Parameter Data
    Technical Appendix F (PDF) (7 pp, 31K) - Summary of Differences Between RSEI Data and TRI Public Data Release

Top of page


Local Navigation


Jump to main content.