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Model Report

Regional Air Impact Modeling Initiative Risk Management and Analysis Platform

Last Revision Date: 07/11/2011 View as PDF
General Information Back to Top
Model Abbreviated Name:

Model Extended Name:

Regional Air Impact Modeling Initiative Risk Management and Analysis Platform
Model Overview/Abstract:
U.S. Environmental Protection Agency (U.S. EPA) Region 6 developed Risk-MAP under the Regional Air Impact Modeling Initiative (RAIMI). Risk-MAP is a fully integrated ArcView extension designed to work in concert with ArcMAP's expansive GIS and mapping capabilities. Risk-MAP is a risk modeling and analysis tool designed to estimate potential human health impacts associated with exposure to chemical emissions.

RAIMI Background

The U.S. Environmental Protection Agency (EPA), Region 6, established the Regional Air Impact Modeling Initiative (RAIMI) Program as a risk-based prioritization tool and project platform designed to develop, implement, and track multi-media solutions to environmental problems. RAIMI allows for region-wide prioritization of the potential for health risks, on a community level of resolution, associated with exposure from multiple contaminants from multiple sources and through multiple exposure pathways. The RAIMI platform is a combination of flexible exposure/risk methodologies which depend on the integrated use of a number of components supported by advanced modeling/software tools. Specifically these include the following components and supporting software tools:

  • Emission Characterization - Data Miner
  • Air Dispersion Modeling - Air Modeling Preprocessor (AMP)
  • Risk Modeling - Risk Management and Analysis Platform (Risk-MAP)

Keywords: Cumulative Risk, Risk Assessment, Community Assessments, Exposure, Chemical Fate and Transport, GIS, Arc View, Air, Toxics, Combustion, Human Health, Emissions Inventory
Model Technical Contact Information:
Agency Contact
Jeffrey Yurk
U.S. EPA, Region 6 (Mail Code: 6PD-0)
(214) 665-8309

Developer Contact
Jeffrey T. Ayers
Air Management Group
San Antonio Texas
Office: 830.229.5346
Cell: 210.215.2460

Model Homepage: http://www.epa.gov/earth1r6/6pd/rcra_c/raimi/index.htm
Substantive Changes from Prior Version: Addition of Soil Ingestion, Produce Consumption, Animal Product (Beef, Chicken, Milk, Egg) Consumption, Water Ingestion, Fish Consumption, Breast Milk Consumption and Acute Inhalation Exposure Pathways

User Information Back to Top
Technical Requirements
Computer Hardware
  • PC-Intel
  • 128 MB RAM
  • 400 MB Disk Space
  • 450 MHz processor
  • 256+ MB RAM
  • 5+ GB Disk Space
  • 2+ MHz processor
Compatible Operating Systems
Windows NT 4.0 with Service Pack 6a (or)
Windows 2000 with Service Pack 3 or later (or)
Windows XP (Home Edition and Professional)
Other Software Required to Run the Model
Arc View 9.2
Microsoft Access 2003
Microsoft Data Access Files (version 2.7 or newer)
Download Information
Using the Model
Basic Model Inputs
Basic Risk-MAP inputs include the following:
  • Source-specific data inputs including:
    1. Speciated emission rates
    2. Physical source information to support air dispersion modeling
    3. Important attribute information (e.g., facility name and permit status)
  • Air dispersion modeling results
  • Background maps and associated data
Basic Model Outputs
Basic Risk-MAP outputs include:
  • Results summary tables
  • Custom Maps and reports
  • Advanced result outputs and mapping capabilities
User Support
User's Guide Available?
Available at:
Other User Documents
Yes, available at: http://www.epa.gov/earth1r6/6pd/rcra_c/raimi/index.htm
Availability of User Support
Jeffrey Yurk
U.S. EPA, Region 6 (Mail Code: 6PD-O)
(214) 665-8309
User Qualifications
GIS, Chemical Fate and Transport, Risk Assessment, Exposure Modeling, Database Management, Air Modeling Expertise recommended.

Model Science Back to Top
Problem Identification
Risk-MAP is a risk modeling and analysis tool designed to estimate potential human health impacts associated with exposure to chemical emissions. The tool is designed to estimate exposure over large geographic areas while maintaining a localized level of resolution (e.g., neighborhood). Results can be generated at 15 and 3 arc second spacing and down to a high-resolution 0.3 arc second spacing. Results are managed to support all possible combinations of exposure analysis, including cumulative exposure, source-specific, contaminant-specific, and source- and contaminant-specific results. Results are fully transparent and traceable back to individual emission sources and contaminants. This capability supports key RAIMI objectives including attribution profiling, trending analysis, data gap characterization, and solutions management.
Summary of Model Structure and Methods
Risk-MAP implements standard exposure models. Current methodology, including air dispersion modeling and exposure characterization, follows the Human Health Risk Assessment Protocol (HHRAP) and EPA Region 6 RAIMI methodology. Risk-MAP Version 1.0 currently implemented the direct inhalation exposure pathway and calculated contaminant-specific media concentrations, cancer risk, and hazard estimates. Risk-MAP Version 2.3 includes additional indirect exposure pathways identified in HHRAP.
Model Evaluation
See Validation Report at:
http://www.epa.gov/earth1r6/6pd/rcra_c/raimi/index.htm See Peer Review at:
Key Limitations to Model Scope
Risk Modeling and exposure equations based on U.S. EPA Final HHRAP (EPA520-R-05-006). Spatial scale and scope can be limited by available computer resources including processor speeds and hard drive storage capacity for large scale assessments (e.g., multi-county or state-level modeling). Consideration of available computer resources should be made prior to conducting large scale assessments.
Case Studies
See Case Study at: http://www.epa.gov/earth1r6/6pd/rcra_c/raimi/index.htm

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