{"data":{"id":"us/40-cfr-147.3012","jurisdiction":"us","citation":"40 CFR 147.3012","heading":"Construction requirements for Class I wells.","body":"In addition to the cementing requirement of § 146.12(b) of this chapter, owners and operators of Class I wells shall, through circulation, cement all casing to the surface.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 147—STATE, TRIBAL, AND EPA-ADMINISTERED UNDERGROUND INJECTION CONTROL PROGRAMS","Subpart HHH—Lands of the Navajo, Ute Mountain Ute, and All Other New Mexico Tribes"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"2860bd9e233a86264203b122c82f11ad6e521f6f36edb690810987db788d7ae9","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-147.3011","next":"us/40-cfr-147.3013"},"notice":"GroundRules: Original legal text. Not legal advice."}