The D.C. Circuit vacated an interim final rule issued by EPA that would allow manufacturers of heavy-duty diesel engines to pay nonconformance penalties in exchange for the right to sell engines that fail to satisfy nitrogen oxide requirements. In 2001, EPA issued a rule requiring a 95% reduction in...

A district court dismissed environmental groups' complaint against two railroad companies alleging that diesel particulate matter (DPM) emitted by diesel-engine locomotives, trucks, and other equipment has caused and is causing an imminent and substantial risk to human health and the environment...

The D.C. Circuit held unripe an oil and natural gas association's petition for review challenging a 2008 EPA regulation deregulating many hazardous secondary materials under RCRA. The association argued that EPA erred in not including in the deregulation a category of hazardous secondary materia...

The Sixth Circuit held that the CAA's citizen suit provision does not allow an environmental group to file suit to compel the state of Ohio to administer a particular federal CAA regulation it has chosen no longer to administer. In 2006, the Ohio General Assembly passed legislation that allows the s...

A district court held that a company may go forward with its RCRA claim against the former owner, but not the current owner, of adjacent property for groundwater contamination. The complaint contains sufficient factual allegations supporting the company's claim that the former owner of the neigh...

A California court overturned a small claims court's grant of damages in favor of a woman who filed suit against an automobile manufacturer for making fraudulent claims about her hybrid car's fuel economy and performance. The manufacturer's fuel economy ratings were obtained using the test metho...

A district court held that EPA does not have a mandatory duty to review and, if necessary, promulgate new PSD rules for ozone simply because the NAAQS for ozone has been revised. The history of the CAA and its numerous amendments unambiguously demonstrates that Congress differentiated duties ste...

A district court held that an environmental group may go forward with its CAA citizen suit against EPA for failing to promulgate by November 15, 2000, regulations to reduce hazardous air pollutant emissions created during the manufacturing of brick and structural clay products. EPA filed a motio...