Analysis of the AP-42, Supplement 5 Emission Model

Report No: 77-R19

Published in 1976

About the report:

This report examines the performance of the source strength model presented in the U.S. Environmental Protection Agency publication AP-42, Supplement 5 relative to field data gathered during the AIRPOL project and relative to the previous source strength model, AP-42, Supplement 2. The report demonstrates that the Supplement 5 model can be expected to produce "worst case" emission estimates on the order of 1.6 to 2.1 times those of Supplement 2 for typical Virginia applications. Since it appears that Virginia will be required to implement the Supplement 5 model, it is recommended that (1) operation phase input data be accurately determined on a project-by-project basis, (2) "worst case" type analyses be realistically conceived, and (3) the Department request that the FHWA and EPA justify the twofold increase in emission estimates of Supplement 5 over Supplement 2.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Other Authors

William A. Carpenter

Last updated: January 28, 2024

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