EPA determined that the Dallas/Fort Worth moderate nonattainment area failed to attain the 1997 eight-hour ozone NAAQS and reclassified the area as a serious ozone nonattainment area; attainment must be reached no later than June 15, 2013.

EPA amended specific provisions in the GHG reporting rule to complement the final rule published on October 28, 2010.

EPA approved Virginia's negative declaration and request for EPA withdrawal of its CAA §§111(d) and 129 plan approval for hospital/medical/infectious waste incinerator (HMIWI) units.

In re Motors Liquidation Corp., No. 09-50026 (REG) (Bankr. S.D.N.Y. Mar. 4, 2011). Settling CAA, CERCLA, and RCRA parties responsible for violations at multiple facilities and sites nationwide must pay $4,613,322 from bonds, with an additional $10.5 million in bond requirements for six non-owned sites, must provide the United States with an allowed general unsecured claim of $36,290,270 for environmental remediation at 29 non-owned sites, and must pay civil penalties for violations at multiregional sites. 

EPA issued a stay until March 14, 2011, of the requirement for chemical manufacturing area sources to comply with the NESHAPs permit program.

EPA issued an SIP call to 13 states whose plans do not apply PSD requirements to GHG-emitting sources and established deadlines for their compliance.

DOE proposed to amend its existing regulations governing compliance with NEPA, particularly its categorical exclusions.

SIP Approval: Maryland (VOC emissions)

EPA determined that the Louisville metro air pollution control district failed to submit an SIP that applies PSD requirements to GHG-emitting sources by January 1, 2011.

EPA issued a final rule requiring GHG monitoring and reporting from facilities that conduct geologic sequestration of carbon dioxide.