COMMENT PERIOD BEGINS | Significant Revision to Air Quality Control Permit for Freeport-McMoRan — Morenci in Greenlee County

On Jan. 25, 2023, the public comment period begins for the proposal to issue Significant Permit Revision Number 96391 to Air Quality Control Permit Number 72683 to Freeport-McMoRan Morenci, Inc. for the modification of the Concentrate Leach Plant at Freeport-McMoRan — Morenci, a copper and molybdenum ore mining and processing facility located in Greenlee County. The comment period ends Feb. 24, 2023.

Public Notice Information

Class I Significant Permit Revision No. 96391

The facility is subject to the requirements of the Federal Clean Air Act, Code of Federal Regulations, Arizona Revised Statute 49-426, and the Arizona Administrative Code, Title 18, Chapter 2. The facility emits the following air contaminants: coarse particulate matter with diameters 10 micrometers or less (PM10), fine particulate matter with diameters 2.5 micrometers or less (PM2.5), volatile organic compounds (VOCs), nitrogen oxides (NOx), sulfur dioxide (SO2), carbon monoxide (CO) and hazardous air pollutants (HAPs).

Permittee

Freeport-McMoRan, Inc.

Facility Information

Freeport-McMoRan – Morenci
4521 U.S. Highway 191
Morenci, AZ 85540

Review Documents

Original Published Public Notice | View/Download > 
Draft Permit | View/Download > 
Draft Technical Support Document | View/Download > 
Permit Application | View/Download >

You may also review the above documentation in person at the ADEQ Record Center | Learn How >

Public Comment Period 

Dates: Jan. 25, 2023 – Feb. 24, 2023

Comments may be submitted as follows:
     By Email | Send Email > 
     By Mail (Must be postmarked or received by Feb. 24, 2023):

       ADEQ
       Karla Murrieta
       Air Quality Division
       1110 W. Washington St.
       Phoenix, AZ  85007

People who file comments on the permit will have the right to appeal the final decision as an appealable agency action to the Office of Administrative Hearing (OAH) pursuant to §41.1092.03, and the appeal must be filed within 30 days after the issuance of the final decision. The OAH may sustain, modify or reverse the final decision.

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 >