SIP Approval: Florida (infrastructure requirements for the 2015 eight-hour ozone NAAQS).

SIP Proposal: Vermont (infrastructure requirements for the 2015 ozone NAAQS). 

SIP Approval: Oklahoma (infrastructure requirements for the 2015 ozone NAAQS). 

SIP Approval: West Virginia (infrastructure requirements for the 2015 ozone NAAQS).

SIP Approval: Virginia (infrastructure requirements for the 2015 ozone NAAQS).

SIP Proposal: Massachusetts (infrastructure requirements for the 2015 ozone NAAQS). 

SIP Approval: Massachusetts (infrastructure requirements for the 2015 ozone NAAQS). 

SIP Proposal: Kentucky (infrastructure requirements for the 2015 eight-hour ozone NAAQS). 

SIP Approval: Georgia and North Carolina (infrastructure requirements for the 2015 eight-hour ozone NAAQS). 

SIP Approval: Massachusetts (finding of failure to submit various infrastructure requirements for the 2015 ozone NAAQS).