StacksVerified U.S. regulatory reference

40 CFR §98.80

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The cement production source category consists of each kiln and each in-line kiln/raw mill at any portland cement manufacturing facility including alkali bypasses, and includes kilns and in-line kiln/raw mills that burn hazardous waste.