StacksVerified U.S. regulatory reference

40 CFR §63.9280

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
This subpart PPPPP establishes national emission standards for hazardous air pollutants (NESHAP) for engine test cells/stands located at major sources of hazardous air pollutants (HAP) emissions. This subpart also establishes requirements to demonstrate initial and continuous compliance with the emission limitations contained in this NESHAP.