Categorical Exclusion Determination
Office of NEPA Policy and Compliance
March 21, 2016
Estimated Read Time min
The Sodium Components Maintenance Shop (SCMS) Storage building at the Materials and Fuels Complex (MFC) building MFC-793C is used for storage of Toxic Substances Control Act (TSCA)-regulated contact-handled low level waste (CH LLW) and mixed LLW. The building size is 40 × 30 ft with a 16-ft eave height. The floor of the storage building is concrete, sloping toward the center with two small concrete sumps designed to remove liquid resulting from precipitation. The floor is painted with an epoxy coating; however, the epoxy floor is not maintained as the secondary containment. Waste containing liquids are stored atop spill pallets and non-liquid hazardous waste/mixed waste containers are stored on pallets or secondary containment devices. The prefabricated metal building has ridge ventilation and a wall louver to provide gravity ventilation. This facility has a Hazardous Waste Management Act/Resource Conservation and Recovery Act (HWMA/RCRA) permit to store and treat mixed waste. Waste is stored, packaged, and repackaged in the facility. The proposed action would procure a soft-walled containment tent inside MFC-793C that would be set-up within the facility as needed, and used to provide contamination control and containment for opening various radiologically contaminated or mixed waste containers for examination, maintenance, repackaging, or container treatment.