The Hazardous Air Pollutant Exposure Model, Version 5 (HAPEM5)
Overview of HAPEM5
The HAPEM5 model has been designed to predict the "apparent" inhalation exposure for specified population groups and air toxics. Through a series of calculation routines, the model makes use of census data, human activity patterns, ambient air quality levels, climate data, and indoor/outdoor concentration relationships to estimate an expected range of "apparent" inhalation exposure concentrations for groups of individuals. Further technical details about the HAPEM model please refer to the 1996 NATA section on HAPEM4. Other exposure and risk models can be found at the FERA (Fate, Exposure, and Risk Analysis) Web site.New Features in HAPEM5
The Hazardous Air Pollutant Exposure Model, Version 5 (HAPEM5) includes a number of new features. Some of these new features are designed to provide exposure estimates that better characterize the variability across the population. Others provide more recent data for improved accuracy in exposure estimates. Several aspects of HAPEM5 have also been modified to make it easier to apply. These new features are summarized here, and detailed in other portions of this User's Guide.
|Revised Users Guide for the HAPEM5 Model (300kb)|
|HAPEM5 Modeling System (68mb)|
|HAPEM5 Modeling System Readme file (4kb)|
|HAPEM5 ME Factor Memo (65kb)|
For information on the pdf format see http://www.epa.gov/epahome/pdf.html.