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https://www.federalregister.gov/documents/2026/04/13/2026-07061/hazardous-and-solid-waste-…

… surface impoundments, and those active facilities ( i.e., facilities producing electricity for the grid as of October 19, 2015) that ceased placing CCR in onsite CCR units prior to the effective date of the 2015 CCR Rule. Owners or operators of some legacy CCR surface impoundmen…