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Freeport Sierrita Inc. | VRP Site


6200 W. Duval Mine Road, Green Valley, AZ

Acceptance Into Voluntary Remediation Program (VRP):

August 15, 2007

Contaminants of Concern (COCs):

  • Uranium
  • Metals

Affected Media:

  • Soil
  • Groundwater

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.

For Groundwater | If you are connected to a Public Water System (PWS) there is little to no risk of impact from exceedances because the water is filtered through the PWS for residential and business use. | View Drinking Water Notices > 

If you have a private well in the vicinity of the exceedance, we encourage you to test the well water.
Not sure what to test for? | 
Learn More > 

Site Summary:

  • Extensive soil characterization has been completed
  • No uranium source identified in soil during investigations
  • A Sulfate Mitigation Order and monitored Aquifer Protection Permit (APP) wells are preventing offsite groundwater impacts
  • Baseline Human Health Risk Assessment received in November 2018
  • ADEQ hosted a kick-off meeting in December 2018 for the formal review of the Baseline Human Health Risk Assessment (BHHRA). Review completed by ADEQ in March 2019
  • ADEQ and Volunteer are working cooperatively to address outstanding issues in the BHHRA. Meetings and teleconferences have been hosted by ADEQ approximately once every three weeks since March 2019. ADEQ expects a revised BHHRA from Volunteer in summer 2019