This report summarizes the meteorological, nitrogen dioxide (NO2), sulfur dioxide (SO2), ozone (O3), and particulate matter (PM) data collected at the Resolution Copper Project near Superior, Arizona for the fourth quarter, October 1-December 31, 2012. Monitoring was performed in accordance with the Resolution Copper Mining Monitoring Plan, November 2011 (approved by the Pinal County Air Quality Control District on November 15, 2011).