Published in 1976
This report details the mechanics of implementing the computer program AIRPOL-4A. AIRPOL-4A supersedes AIRPOL-4. The upgrade from version 4 to version 4A is a result of the new emissions guidelines contained in Supplement 5 to AP-42, April 1975, by the Environmental Protection Agency. Appendix A details the mechanics of implementing the computer program EMISSION, which has been designed to meet these new guidelines.
Last updated: January 29, 2024