# Clean Air Act Operating Permit Program; Order on Petition for Objection to State Operating Permit for the Copperstone Gold Mine > Briefs, arguments, decisions, and more. URL: https://www.frixlaw.com/law-library/documents/fr%3A2026-14867 ## Record - **Collection:** Federal Register - **Document type:** Notice - **Published:** July 23, 2026 - **Citation:** 91 FR 46436 ## Text ENVIRONMENTAL PROTECTION AGENCY [FRL-13498-01-R9] Clean Air Act Operating Permit Program; Order on Petition for Objection to State Operating Permit for the Copperstone Gold Mine AGENCY: Environmental Protection Agency (EPA). ACTION: Notice of final order on petition. SUMMARY: The Environmental Protection Agency (EPA) Administrator signed an order dated June 23, 2026, denying a petition dated June 6, 2025, from the Center for Biological Diversity. 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 Bonanza Explorations, Inc., for Copperstone Gold Mine, an underground mining operation in La Paz County, Arizona. FOR FURTHER INFORMATION CONTACT: Catherine Valladolid, EPA Region 9, (415) 947-4103, valladolid.catherine@epa.gov. The final order and petition are available electronically at: https://www.epa.gov/title-v-operating-permits/title-v-petition-database. SUPPLEMENTARY INFORMATION: The EPA received a petition from the Center for Biological Diversity dated June 6, 2025, requesting that the EPA object to the issuance of operating permit no. 99365, issued by the ADEQ to Bonanza Explorations, Inc., in La Paz County, Arizona. On June 23, 2026, the EPA Administrator issued an order denying the petition. The order explains the basis for the EPA's decision. Sections 307(b) and 505(b)(2) of the CAA provide that a petitioner may request judicial review of those portions of an order that deny issues in a petition. Any petition for review shall be filed in the United States Court of Appeals for the appropriate circuit no later than September 21, 2026. Authority: 42 U.S.C. 7401 et seq. Dated: July 9, 2026. Anita Lee, Director, Air and Radiation Division, Region IX. [FR Doc. 2026-14867 Filed 7-22-26; 8:45 am] BILLING CODE 6560-50-P --- Source: Frix Law Library, https://www.frixlaw.com/law-library/documents/fr%3A2026-14867. Public record. Not legal advice.