Categorical Exclusion Determination
Office of NEPA Policy and Compliance
January 14, 2019The Materials and Fuels Complex storm water system incorporates a series of tributary ditches, inlets, manholes, culverts, and storm drain piping. The system conveys most storm water runoff to the Materials and Fuels Complex Industrial Waste Pond. Materials and Fuels Complex modified portions of the storm water system when upgrading the intrusion detection system in 2016 and 2017. Following the storm water system modifications, the electrical and communication manholes located east of storm water shallow injection well 31-ANL began filling with water during storm events. The purpose of the proposed action is prevention of water infiltration to the electrical and communication manholes to support proper functioning of Materials and Fuels Complex systems relying on the electrical and communication systems.