Location: 

• Patagonia Mountains, Harshaw, Arizona

Acceptance Into Voluntary Remediation Program (VRP):

• Nov. 21, 2014
  

Contaminants of Concern (COCs):

• Metals
  

Affected Media:

• Soil
• Surface Water
  

What are My Health Risks:

For Soil | There is little to no health risk unless there is contact with skin or ingestion of contaminated soil

Site Summary:

• A tailing storage facility, underlain retention pond and active treatment water system is being constructed to address historical mine tailings and tailings seepage
• APP and AZPDES permits have been issued in January 2018 by ADEQ
• A Stormwater Pollution Prevention Plan (SWPPP) is in place
• In April 2019, South 32 submitted a Remedial Action Work Plan to address the closure of the historic wetlands
• In June 2019,  the VRP provided South32 with comments (following a 45 day public comment period) on the Remedial Action Work Plan
• In October 2019, ADEQ approved the Remedial Action Work Plan
• In April 2020, South32 submitted a Background Study Work Plan
• In June 2020, ADEQ approved the Background Study Work Plan
• In September 2021, South32 submitted a Background Study Report
• In February 2022, ADEQ provided comments on the Background Study Report
• On Feb. 1, 2023, ADEQ approved the Background Study Report
• In August 2024, South32 submitted a Cleanup Completion Report for the historic wetlands
• On Oct. 11, 2024, ADEQ approved the Cleanup Completion Report for the historic wetlands