NSSI Sources and Services, Inc. is based on 5-acre facility in southeast Houston. NSSI offers chemical and radioactive decontamination,leak testing,radiation instrument calibration, radiation safety training, and waste disposal. Waste disposal activities encompass the treatment, storage, and disposal of radioactive, hazardous and non-hazardous, and mixed radioactive/hazardous wastes. NSSI also manufactures radioactive tracer materials and radioactive sealed sources.