CFR›Title 40›Chapter I›Part 146›40 CFR Part 146 Subpart C Citation40 CFR Part 146 Subpart CContainsSections § 146.21–§ 146.24CorpusDaily eCFRDisplayed edition2026-10-08Last updated2026-10-08 Subpart C—Criteria and Standards Applicable to Class II Wells Sections § 146.21 § 146.21 Applicability. § 146.22 § 146.22 Construction requirements. § 146.23 § 146.23 Operating, monitoring, and reporting requirements. § 146.24 § 146.24 Information to be considered by the Director. AuthoritySafe Drinking Water Act, 42 U.S.C. 300f et seq.; Resource Conservation and Recovery Act, 42 U.S.C. 6901 et seq.Source45 FR 42500, June 24, 1980, unless otherwise noted.