SIP Proposal: Arizona (revisions concerning issuance of permits for stationary sources). 

SIP Proposal: Kansas (disapproval of revisions concerning regional haze). 

SIP Proposal: California (revisions to rule governing the issuance of permits for stationary sources in the San Luis Obispo County Air Pollution Control District, and revisions to clarify that the district is not subject to the federal implementation plan related to the protection of visibility). 

SIP Approval: Arkansas (revisions to rules concerning implementation for air pollution control). 

SIP Approval: Oklahoma (control of emission of volatile organic compounds and emission of volatile organic compounds in nonattainment areas and former nonattainment areas). 

SIP Approval: California (updated transportation conformity procedures and exchange of travel data for emissions inventories developed for air quality plans and regional transportation conformity analyses in the San Francisco Bay Area). 

SIP Approval: New York (amendments to regulations governing an existing emission statement program for stationary sources). 

SIP Approval: Washington (revisions to rules concerning excess emissions from startup, shutdown, and malfunction events). 

SIP Proposal: California (requirements concerning nitrogen oxide emissions in the Yolo-Solano Air Quality Management District).  

SIP Proposal: Arizona (revisions to definitions of certain terms related to implementation of local rules for air pollution regulation in the Maricopa County Air Quality Department).