A 40-year-old pumping system sends 1.5 million gallons a day through a DuPont wastewater treatment plant at Deepwater; the treated water goes in the river. Volatile organic chemicals and PFOAs flow underground; EPA, Chemours, the Army Corps of Engineers and the New Jersey Department of Environmental Protection are investigating what else to do and how much it will cost. There are similar issues with benzene and PCBs at DuPont's 1,900-acre Repauno site in nearby Gibbstown, which remains part of DuPont.Federal agencies are investigating what needs to be done at the 1,445-acre site.