SIP Approval: Kentucky (infrastructure requirements for the 2012 fine particulate matter NAAQS).

SIP Approval: Kentucky (infrastructure requirements for the 2012 fine particulate matter NAAQS).

SIP Approval: Kentucky (infrastructure requirements for the 2012 fine particulate matter NAAQS).

SIP Approval: Connecticut (infrastructure requirements for the 2010 sulfur dioxide NAAQS).

SIP Approval: Connecticut (infrastructure requirements for the 2010 sulfur dioxide NAAQS).

SIP Approval: Connecticut (infrastructure requirements for the 2010 sulfur dioxide NAAQS).

SIP Approval: Nevada (regional haze five-year progress report).

SIP Approval: Nevada (regional haze five-year progress report).

SIP Approval: Nevada (regional haze five-year progress report).

SIP Approval: Idaho (attainment demonstraton for fine particulate matter for the Idaho portion of the Logan Utah/Idaho area).