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PUBLIC NOTICE | New Air Quality Permit - South32 Hermosa Project

Public Notice

Extended Comment Period - New Air Quality Permit | South32 Hermosa Project

Posted on: Jan. 5, 2024 - 7:00 a.m.

On Jan. 5, 2024, the comment period begins for the proposal to issue an Air Quality Control Permit to South32 Hermosa Inc. for the construction and operation of an underground zinc, silver and manganese mine located in Santa Cruz County, Arizona.

In response to requests at the January 11 community meeting, the public comment period has been extended and ends on Feb. 26, 2024. We have also rescheduled the public hearing | View Details >

Type: Class I Air Quality Permit
Permit No.: 96653


South32 Hermosa Inc.


Hermosa Project
749 Harshaw Road, Patagonia, AZ 85624
Santa Cruz County

Review Documents:

  • Notice of Comment Period Extension | View > 
  • Original Published Public Notice | View > 
  • Draft Permit | View > 
  • Technical Support Document | View > 
  • Permit Application | View >
  • Modeling Report | View > 

You may review the above documentation in person at:

  • ADEQ Record Center | Learn How >
  • Town of Patagonia, Town Clerk's Office, 310 McKeown Ave., Patagonia, AZ 85624

Public Comment Period:

Dates: Jan. 5, 2024 – Feb. 26, 2024

Comments may be submitted as follows:

  •     By Email | Send Email >
  •     By Mail (Must be postmarked or received by Feb. 26, 2024):

Air Quality Division, Air Permits
Attn: Karla Murrieta
1110 W. Washington St.
Phoenix, AZ  85007

EPA Petition Process

This permit is subject to review by the Environmental Protection Agency (EPA) pursuant to 40 CFR 70.8 and Arizona Administrative Code R18-2-307. If EPA does not object to the issuance of this permit, you may petition to EPA within 60 days after the expiration of EPA's 45-day review period. A petition shall be based only on objections to the permit that were raised with reasonable specificity during the public comment period, unless the petitioner demonstrates that it was impracticable to raise such objections within such period, or unless the grounds for such objection arose after such period. Any person who petitions to EPA pursuant to 40 CFR 70.8(d) shall notify ADEQ by certified mail within 10 days after such petition.

Comments may be submitted to EPA according to the process for Title V Petitions | Learn More > 



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