In Re: Methyl Tertiary Butyl Ether Products Liability Litigation

Background

This case is part of a consolidated multidistrict litigation concerning groundwater contamination caused by releases of gasoline containing methyl tertiary butyl ether, or MTBE. The Commonwealth of Pennsylvania alleges that dozens of gasoline manufacturers, distributors, and sellers are liable for actual or threatened MTBE contamination in Pennsylvania’s drinking water.

The Commonwealth’s remaining claim is negligence. Among the damages it seeks are future costs to test and treat drinking-water wells near MTBE release sites. Under a court-supervised process, the parties identified 75 Focus Sites for discovery and the first trial; 71 remained at issue when this motion was filed. The defendants’ motion concerned future well-testing and treatment costs at 55 Focus Sites.

The Commonwealth did not oppose the motion as to 36 of those sites. Nineteen sites remained disputed. The Commonwealth’s expert, Anthony Brown, said additional data was needed to evaluate the risk to nearby wells. He characterized the risk as “possible” or “unknown,” explaining that he could not say contamination was more than 50% likely because of the lack of available data. He offered no opinion about the costs of treating any contamination that future testing might find.

Procedural Issue

The Commonwealth argued that the motion was improper because it addressed only particular remedies for a subset of sites rather than an entire claim or defense. It contended that the defendants should instead raise the issue in a motion made shortly before trial.

The court rejected that argument. Federal Rule of Civil Procedure 56 allows a party to seek summary judgment on a claim, defense, or part of a claim or defense. The court explained that partial summary judgment need not produce a final judgment and can establish issues before trial.

Merits of the Motion

Summary judgment is appropriate when there is no genuine dispute about a material fact and the moving party is entitled to judgment under the law. A material fact could affect the outcome, and a genuine dispute exists when the evidence could allow a reasonable jury to decide for the nonmoving party. After discovery has ended, a party cannot avoid summary judgment through conclusory statements or by suggesting that additional evidence might become available later.

Under Pennsylvania negligence law, the plaintiff must prove, among other things, a causal connection between the defendant’s conduct and an injury, as well as actual loss or damage. The plaintiff also bears the burden of proving damages. Pennsylvania law does not allow a damages award based on speculation when the uncertainty concerns whether damages occurred at all.

The court held that the defendants were entitled to summary judgment on the Commonwealth’s demand for future well-testing costs at the 19 remaining sites. The Commonwealth’s expert did not know whether the nearby wells would require treatment, and the Commonwealth identified no other evidence it would present at trial to show that it was entitled to these costs. The court concluded that no material factual dispute remained for a jury regarding future testing or treatment of the wells.

The court also rejected the Commonwealth’s argument that a jury should decide the extent of future damages. The court distinguished cases allowing expert testimony about possible future harm because, here, the Commonwealth had not shown that it was more likely than not that it would incur treatment costs or any other damages to address contamination in the nearby wells.

Disposition

On June 13, 2025, Judge Denise Cote granted the moving defendants’ March 21, 2025 motion for partial summary judgment as to the Commonwealth’s claim for future well-testing and treatment costs. The opinion addresses those damages and does not state that the entire negligence case was resolved.