CFR > Title 40 > Chapter I > Subchapter C > Part 98 > Subpart Q CFR > Title 40 > Chapter I > Subchapter C > Part 98 > Subpart Q – Iron and Steel Production Current as of: 2024 | Check for updates | Other versions § 98.170 Definition of the source category § 98.171 Reporting threshold § 98.172 GHGs to report § 98.173 Calculating GHG emissions § 98.174 Monitoring and QA/QC requirements § 98.175 Procedures for estimating missing data § 98.176 Data reporting requirements § 98.177 Records that must be retained § 98.178 Definitions