SIP Approval: Wyoming (update to one-hour and secondary sulfur dioxide NAAQS).

SIP Approval: Wyoming (update to one-hour and secondary sulfur dioxide NAAQS).

SIP Approval: Wyoming (update to one-hour and secondary sulfur dioxide NAAQS).

SIP Approval: West Virginia (2011 base-year emissions inventory for the 2010 one-hour sulfur dioxide NAAQS in the Marshall nonattainment area).

SIP Approval: West Virginia (2011 base-year emissions inventory for the 2010 one-hour sulfur dioxide NAAQS in the Marshall nonattainment area).

SIP Approval: West Virginia (2011 base-year emissions inventory for the 2010 one-hour sulfur dioxide NAAQS in the Marshall nonattainment area).

SIP Approval: Georgia (revisions to air quality rules, including definitions and standards for fine particulate matter).

SIP Approval: Georgia (revisions to air quality rules, including definitions and standards for fine particulate matter).

SIP Approval: Georgia (revisions to air quality rules, including definitions and standards for fine particulate matter).

EPA entered into a proposed administrative settlement under CERCLA concerning the Capitol City Plume Superfund site in Montgomery, Alabama, that addresses costs from a fund-lead remedial investigation performed by the Agency at the site.