Mealey's ( May 28, 2025, 1:39 PM EDT) -- NEW YORK — A federal judge in New York has granted Pennsylvania partial summary judgment on affirmative defenses asserted by Exxon Mobil Corp. and its affiliates in a long-running case alleging groundwater contamination from the presence of methyl tertiary butyl ether (MTBE), ruling that the defendants cannot succeed at trial with their assumption of risk defense and that the fact that the state did not prohibit the use of MTBE in gasoline “does not mean that it assumed the risk of any outcome of that activity.”...