By Rob Daniel Republic Services agreed to pay $48 a share, or about $1.5 billion, for US Ecology, bringing together two major environmental-services companies. Republic Services (RSG) – Get Republic Services, Inc. Report definitively agreed to pay $48 a share, or about $1.5 billion, for US Ecology (ECOL) – Get US Ecology, Inc. Report, bringing together two major environmental services companies. The deal, valued at $2.2 billion including debt, vertically integrates and expands Phoenix-based Republic Services, meeting “customers’ demand for a single source partner with a recognized track record…