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89 FR 50231

SIP Approval: West Virginia (second 10-year limited maintenance plans for the 2006 24-hour fine particulate matter NAAQS for the Charleston area and the West Virginia portion of the Steubenville-Weirton, Ohio-West Virginia area).

89 FR 50227

SIP Approval: North Carolina (updates to 2026 on-road and nonroad emissions inventories, safety margins, and motor vehicle emissions budgets). 

89 FR 49120

SIP Proposal: Michigan (removal of redundant definition for "used oil"). 

89 FR 49874

EPA designated one new equivalent method for measuring concentrations of ozone in ambient air.

89 FR 49815

SIP Approval: California (revisions to meet extreme area requirements for the 1997 eight-hour ozone NAAQS in the Riverside Co. nonattainment area).

89 FR 49100

SIP Approval: Michigan (removal of redundant definition for "used oil"). 

Mid Valley Pipeline Co., L.L.C. v. Rodgers

The Fifth Circuit affirmed dismissal of a constitutional challenge brought by a pipeline company concerning a 1949 permit a local levee board granted to the company to construct and maintain two pipelines across a levee in Mayersville, Mississippi. The company argued the board violated the Contracts...