CFR > Title 40 > Chapter I > Subchapter C > Part 98 > Subpart FF CFR > Title 40 > Chapter I > Subchapter C > Part 98 > Subpart FF – Underground Coal Mines Current as of: 2024 | Check for updates | Other versions § 98.320 Definition of the source category § 98.321 Reporting threshold § 98.322 GHGs to report § 98.323 Calculating GHG emissions § 98.324 Monitoring and QA/QC requirements § 98.325 Procedures for estimating missing data § 98.326 Data reporting requirements § 98.327 Records that must be retained § 98.328 Definitions