Section 408 (33 U.S.C. § 408) is permission to alter or occupy a Corps civil works project — levees, federal channels, and similar. It is separate from 404 and Section 10.
Stream mitigation replaces authorized 404 impacts to streams with credits or permittee-responsible work. Wetland credits do not automatically clear a stream debit.
RCRA is the federal cradle-to-grave hazardous waste law. How it differs from CERCLA, and how it shows up next to Phase I/II site work in the Southeast.
A CatEx is the NEPA path for federal actions that fit an agency’s listed category and clear extraordinary circumstances. It is not a free pass past 404, ESA, or state permits.