The pipeline in Upper Makefield. Credit: Tom Sofield/NewtownPANow.com Officials have confirmed the discovery of jet fuel in another private well in the Mount Eyre section of Upper Makefield Township. The Pennsylvania Department of Environmental Protection (DEP) confirmed that a private well tested positive for separate-phase liquid last month. A monitoring well operated by Energy Transfer and its subsidiary, Sunoco, tested positive for jet fuel on April 1.