"In 2009 and 2010, the Delaware River near Wilmington got a little-noticed early taste of the waste left behind by the controversial natural gas drilling method called fracking. Some 1.4 million gallons of partially treated wastewater collected from hydraulic fracturing, or fracking, wells outside the Delaware River basin were further processed and flushed into Delaware waters through the commercial side of DuPont Co.’s big wastewater plant in Deepwater, N.J., near the foot of the Delaware Memorial Bridge."