40 CFR §52.990
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The State of Louisiana has committed to submit to EPA a SIP revision whenever a new or revised emission limitation for a specific source exceeds the height allowed by Section 921(A) “Good Engineering Practice (GEP) Stack Height 1 or 2” of the State regulations. A letter from the Secretary of Louisiana Department of Environmental Quality, dated September 23, 1986, stated that: