CFR›Title 10›Chapter I›Part 63›Subpart L›Subject Group Groundwater Protection Standards ContainsSections 63.331–63.332CorpusDaily eCFRDisplayed edition2026-04-15Last updated2026-04-15 Sections 63.331 § 63.331 Separate standards for protection of groundwater. 63.332 § 63.332 Representative volume. Previous Additional Provisions Additional Provisions Next Human Intrusion Standard Human Intrusion Standard