While there are several interesting environmental cases currently before the U.S. Supreme Court, two cases are particularly relevant for any legal practitioner handling Superfund cases, whether they involve site remediation issues or litigation over the cleanup costs. The two cases to watch are Atlantic Richfield v. Christian, Case No. 17-1498, and County of Maui v. Hawaii Wildlife Fund, Case No. 18-0260. Respectively, these two cases deal with the important legal questions of preemption and how groundwater discharges can be regulated and enforced. Both issues could have a significant impact on the scope of remediation and potential litigation at Superfund sites. CERCLA practitioners should watch for the opinions in these two cases.

The Atlantic Richfield appeal came out of the Montana Supreme Court, and it asks the court whether the Comprehensive Environmental Response, Compensation and Recovery Act (CERCLA), 42 U.S.C. Section 9601 preempts state common law remedies. The case involves the Anaconda Smelter Site, a Superfund site covering 300 square miles of property impacted by historical smelter and ore processing operations. The U.S. Environmental Protection Agency (EPA) placed the site on the National Priorities List in 1983 and identified Atlantic Richfield Co. as a potentially responsible party (PRP). After years of remedial investigation under EPA oversight, the EPA approved a remedial action plan for the cleanup of the site. The respondents in the appeal are a group of landowners who sued Atlantic Richfield alleging common law tort claims seeking more traditional damages, such as monetary damages and diminution of property value.  However, the respondents also sought relief in the form of restoration, asking that Atlantic Richfield remediate or pay for remediation above and beyond the EPA-approved remedy. The respondents argued that Montana law supports their requested relief and requires Atlantic Richfield to restore the property to its pre-contamination state before the on-set of historical smelting operations. The critical question presented to the court is whether CERCLA preempts state common law claims for restoration that seek clean-up remedies that conflict with EPA-ordered remedies. The Montana Supreme Court held that landowners can pursue common law claims for restoration despite the conflict with EPA’s remedy.