SIP Approval: Colorado (partial approval for the use of obscurants during military exercises at Fort Carson).

SIP Approval: California (limited approval of revisions for nitrogen oxide emissions for the Placer County air pollution control district).

SIP Approval: California (nitrogen oxide (NOx) emissions for the Antelope Valley air quality management district and the Imperial County air pollution control district).

SIP Approval: California (volatile organic compound emissions for the San Joaquin Valley unified air pollution control district).

EPA proposed to amend its marine diesel engine program to encourage owners of Great Lakes steamships to repower those steamships with cleaner marine diesel engines.

EPA amended its marine diesel engine program to encourage owners of Great Lakes steamships to repower those steamships with cleaner marine diesel engines. 

United States v. Marathon Pipe Line Co., LLC, No. 3:11-CV-01123 (S.D. Ill. Dec. 21, 2011). A settling OPA defendant responsible for the discharge of crude oil into the Ohio River and the Wabash River must pay $90,629 in U.S. natural resource damage assessment costs, must restore approximately 7.1 acres of forested wetland, must restore 14.2 acres of adjacent agricultural fields and convert them into hardwood forest, and must install bat houses and wood duck boxes to mitigate damage to the natural habitats of affected species. 

United States v. Thomas Staben, No. CV-10-4419-JST (FMOx) (C.D. Cal. Dec. 30, 2011). Settling CWA defendants that discharged dredged or fill material into waters of the United States in Somis, California, must pay a civil penalty, must restore portions of the impacted area, and must provide compensatory mitigation. 

United States v. Trinski, No. 07-C-3600 (N.D. Ill. Dec. 28, 2011). Settling CWA defendants that discharged dredged or fill material into waters of the United States without a permit must pay a civil penalty and must donate property to the Fox Waterway Agency.

United States v. International Hospitality Assocs., No. 3:11-cv-02200 (D.P.R. Dec. 14, 2011). Settling CWA defendants that discharged pollutants into the waters of the United States without a permit must pay a $474,240 civil penalty and must perform a supplemental environmental project valued at $32,000.