SIP Approval: Wisconsin (partial approval of attainment plan for the Rhinelander 2010 primary one-hour sulfur dioxide nonattainment area).

SIP Approval: Washington (interstate transport requirements for the 2010 sulfur dioxide NAAQS).

SIP Approval: Washington (infrastructure requirements for the 2010 sulfur dioxide and 2015 ozone NAAQS).

SIP Approval: West Virginia (redesignation to attainment and adoption of maintenance plan for the Marshall 2010 sulfur dioxide nonattaiment area). 

EPA announced the availability of and seeks comment on its responses to certain state designation recommendations for the 2010 sulfur dioxide NAAQS, including intended designations for all remaining undesignated areas.

SIP Approval: Indiana (revisions to attainment plan for the Southwest Indiana 2010 sulfur dioxide nonattainment area).

SIP Proposal: Washington (interstate transport requirements for 2010 sulfur dioxide NAAQS).

SIP Approval: Oregon (interstate transport requirements for the 2010 one-hour sulfur dioxide NAAQS). 

SIP Proposal: Indiana (redesignation to attainment and maintenance plan for the Morgan County 2010 sulfur dioxide nonattainment area).

SIP Approval: Georgia (interstate transport requirements for the 2010 one-hour sulfur dioxide NAAQS).