SGS was contracted by Resolution Copper Mining LLC (Resolution) to complete environmental and geotechnical characterization of tailings generated during pilot plant (PP) testing of Cu/Mo ore from the Resolution Copper property located at Superior, Arizona (SGS Project reference No. 12074-001). The purpose of the environmental test program was to assess the geochemical, acid rock drainage (ARD), contaminant release and geotechnical properties associated with the tailings materials.