The D.C. Circuit, in an unpublished opinion, dismissed a petition challenging an EPA computer model that states must use to estimate motor vehicle emissions when developing their strategies to comply with the CAA. Kansas and Nebraska, as well as two nonprofit organizations, alleged that the model is...

The Supreme Court of Montana upheld a lower court decision dismissing a smelting company's state-law claims against an oil refinery in connection with costs incurred remediating a former lead smelting site in East Helena, Montana. The refinery sold the site to the smelting company in 1972. Under the...

The Fifth Circuit upheld an individual's sentence and conviction for wire fraud, money laundering, and CAA violations for selling false renewable fuel credits. The individual represented to EPA and to fuel companies seeking to purchase renewable fuel credits that he manufactured renewable fuels when...

A district court held on motions for summary judgment that a hazardous waste management company should be held liable under CERCLA for PCE contamination, but that material issues of disputed fact preclude a finding that an employee should be liable as an "operator." The testimony of the company's ex...

A district court ordered EPA to either promulgate revised emissions standards for the the pulp mill and nutritional yeast manufacturing source categories, or issue a determination that such standards are not required under the CAA. EPA promulgated emissions standards for both of these major source c...