Clean Air Act Operating Permit Program; Order on Petition for Objection to State Operating Permit for the South32 Hermosa Project
Primary source
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Issuing agencies
Abstract
The Environmental Protection Agency (EPA) Administrator signed an order dated May 30, 2025, granting in part and denying in part a petition dated September 13, 2024, from the Center for Biological Diversity, Patagonia Area Resource Alliance, Sierra Club, Arizona Mining Reform Coalition, Calabasas Alliance/La Alianza Calabasas, and Friends of the Santa Cruz River. The Petition requested that the EPA object to a Clean Air Act (CAA) title V operating permit issued by the Arizona Department of Environmental Quality (ADEQ) to South32 Hermosa Project ("Hermosa") for its zinc, lead, manganese, and silver mine in Santa Cruz County, Arizona.
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