CFR›Title 40›Chapter I›Part 197›Subpart B›Subject Group Human-Intrusion Standard ContainsSections 197.25–197.26CorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 Sections 197.25 § 197.25 What standard must DOE meet? 197.26 § 197.26 What are the circumstances of the human intrusion? Previous Ground Water Protection Standards Ground Water Protection Standards Next Individual-Protection Standard Individual-Protection Standard