This report was prepared to support ongoing National Environmental Policy Act (NEPA) review process for the Resolution Project near Superior, Arizona. This report is an addendum to several previous reports prepared by Montgomery & Associates (M&A) that include detailed analysis and discussion of hydrochemical sampling results for surface water and groundwater in the Upper Queen Creek/Devils Canyon (QCDC) study area including:

• Interim Results of Groundwater Monitoring, Upper Queen Creek and Devil's Canyon Watersheds
• Results of Hydrochemical Characterization, Upper Queen Creek/Devil's Canyon Study Area
• Surface Water Baseline Report, Devil's Canyon, Mineral Creek and Queen Creek Watersheds