EPA deferred for a period of three years the application of the PSD and Title V permitting requirements to biogenic carbon dioxide emissions from bioenergy and other biogenic stationary sources.

EPA updated outer continental shelf air regulations for Virginia.

FWS proposed to remove the regulations that govern the southern sea otter translocation program in the southern waters of California because it has failed to fulfill its purpose.

SIP Approval: California (volatile organic compound (VOC) emissions for the Northern Sierra, Sacramento Metropolitan, and South Coast air quality management districts). 

FWS proposed to designate approximately 25,704 acres in Riverside County, California, as critical habitat for Coachella Valley milk-vetch under the ESA.

EPA determined that Tennessee failed to submit an SIP for the 2006 24-hour NAAQS for fine particulate matter (PM). 

FWS proposed to remove inter-subspecific crossed or generic tigers from the list of species that are exempt from registration under ESA regulations for captive-bred wildlife.

FWS announced a 90-day finding on a petition to delist the valley elderberry longhorn beetle under the ESA; the agency found that delisting may be warranted and initiated a status review. 

FWS announced a 90-day finding on a petition to list the Leona's little blue butterfly as threatened or endangered and to designate critical habitat under the ESA; the agency found that listing may be warranted and initiated a status review.

FWS proposed to designate approximately 2,090 stream miles of federal, state, tribal, and private lands in Arizona, California, Colorado, Nevada, New Mexico, and Utah as critical habitat for the southwestern willow flycatcher under the ESA.