The D.C. Circuit vacated EPA's placement of the West Vermont Drinking Water Contamination site, a site of groundwater contamination beneath Indianapolis, Indiana, on the NPL. EPA used the hazard ranking system (HRS) to determine whether listing was appropriate. As part of that process, EPA assessed ...

The Ninth Circuit upheld a preliminary injunction enjoining California Department of Public Health officials from enforcing the California Medical Waste Management Act (MWMA) against a medical waste facility with regard to how it disposes of medical waste at facilities outside the state. The facilit...

The Ninth Circuit held that a property owner who purchased the site at a tax sale is not entitled to CERCLA's third-party defense to liability for cleanup costs. The purchaser had a "contractual relationship" with the prior owner by virtue of the tax sale. Given the breadth of CERCLA's definition of...

A Texas court, ruling on a petition for pre-suit discovery, held that it would have jurisdiction over a major oil corporation's potential lawsuit against several California cities that have filed suit against it relating to climate change. The company's potential claims would allege, among other thi...

A Colorado court, on motions for summary judgment, held that state and federal law preempt portions of a city ordinance concerning the regulation of oil and gas development within its boundaries. The provisions for minimum setbacks prohibit what state regulations would allow. As such, they are preem...

A district court held that a company is liable under RCRA for soil and water contamination at a former solid waste disposal area it used and operated in Armstrong County, Pennsylvania. Environmental groups filed motions for partial summary judgment against the company, claiming it was liable because...

Pennsylvania's highest court held that the $10,000/day civil penalty under the Clean Streams Law does not apply to each day that pollutants leaked from an impoundment remain in the groundwater and then leach into other waters of the Commonwealth. The case arose after the state environmental agency a...

A district court upheld a surface coal mining permit issued to a company even though the cotenant objected to any mining on the property. The company cotenant conveyed the right to enter and surface mine coal to an affiliate, but the other cotenant did not consent to surface mining. Nevertheless, th...

A Pennsylvania appellate court reversed and remanded a lower court's decision that the owner of an oil and gas company should be liable for failing to plug 47 abandoned oil and gas wells located in Erie and Crawford Counties. The state environmental agency issued an administrative order requiring th...

The D.C. Circuit clarified an earlier ruling vacating portions of a 2015 rule that defined when certain hazardous materials were deemed discarded—as opposed to legitimately recycled—and therefore subject to EPA's oversight under RCRA. In 2017, the court upheld some aspects of the rule and vacate...