40 CFR §52.2180
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The State of South Dakota has committed to revise its stack height regulations should EPA complete rulemaking to respond to the decision in NRDC v. Thomas, 838 F.2d 1224 (DC Cir. 1988). In a letter to Douglas M. Skie, EPA, dated May 11, 1988, Joel C. Smith, Administrator, Office of Air Quality and Solid Waste, stated: