Guide to Selected Algorithms, Distributions, and Databases Used in Exposure Models Developed By the Office of Air Quality Planning and Standards

This report and the appendices provide a detailed description of the components of the models pNEM, APEX, and HAPEM, at the time of the report, along with an explanation of the component's role within the source exposure model. 

• Guide to Selected Algorithms, Distributions, and Databases Used in Exposure Models Developed By the Office of Air Quality Planning and Standards, May 2002 (pdf) (1.75 MB)
• Appendices - Guide to Selected Algorithms, Distributions, and Databases Used in Exposure Models Developed By the Office of Air Quality Planning and Standards, June 2003 (pdf) (468.11 KB)