CFR›Title 40›Chapter I›Part 117 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 117—DETERMINATION OF REPORTABLE QUANTITIES FOR HAZARDOUS SUBSTANCES Subparts A Subpart A—General Provisions Sections 117.1–117.3 B Subpart B—Applicability Sections 117.11–117.14 C Subpart C—Notice of Discharge of a Reportable Quantity Sections 117.21–117.23 Authority33 U.S.C. 1251 et seq., and Executive Order 11735, superseded by Executive Order 12777, 56 FR 54757.Source44 FR 50776, Aug. 29, 1979, unless otherwise noted. Previous 116 Part 116—Designation of Hazardous Substances Next 118 Part 118—Clean Water Act Hazardous Substances Facility Response Plans