sentences:  Currently, WE ACT is one of several groups engaged in negotiations for a Community Benefits Agreement with Columbia University as part of the school's Manhattanville expansion plan.It is also renovating an abandoned brownstone for conversion into the WE ACT Environmental Justice Center, which will house office and program space as well as serve as a demonstration of various green building technologies.In April 1986, the North River Sewage Treatment Plant began its operations on eight blocks of riverside property in West Harlem, Manhattan.