 It has until May 7, 2016, to finish its groundwater investigation under a bill passed unanimously by the New Jersey Legislature in late 2013 that gave polluters a deadline extension on investigating cleanups.according to the NJ DEP, clean-up at Constable Hook has included excavation, stabilization, capping, and the capturing of ground water contamination and installation of steel wall containment systems.The controversial ExxonMobil-New Jersey environmental contamination settlement was made during the governorship of Chris Christie.