EPA proposed to update a portion of California's outer continental shelf air regulations.

EPA proposed reconsideration of NESHAPs for industrial/commercial/institutional boilers and process heaters at major sources, for industrial boilers and commercial and institutional boilers at area sources, and for new source performance standards and emission guidelines for commercial and industrial solid waste incineration units; see above for direct final rules.

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

EPA proposed to amend certain NESHAP regulations for the Maricopa County air quality department in Arizona and the Santa Barbara County air pollution control district in California; see above for direct final rule.

EPA proposed amendments to the NESHAPs for mercury emissions from mercury cell chlor-alkali plants.

EPA proposed final amendments to the NESHAPs for existing stationary spark ignition reciprocating internal combustion engines; see above for direct final rule.

EPA granted a petition submitted by Babcock & Wilcox Nuclear Operations Group, Inc., to delist a certain solid waste generated at its Mt. Athos facility near Lynchburg, Virginia, from the lists of hazardous waste.

EPA identified which nonhazardous secondary materials are to be considered "solid wastes" under RCRA.

EPA approved revisions to Texas' hazardous waste management program.

EPA issued a final rule requiring monitoring and reporting of greenhouse gas (GHG) emissions from additional sources of fluorinated GHGs.