A laboratory or facility for investigation and handling of radioactive chemicals which provides a safe environment for the worker and the public. It's features can vary depending on the type of radioactive emissions to be handled, the quantity, the half-life, and the physical form (solid, liquid, gas, or powder). Special measures to minimize spread of contaminated material and to dispose of radioactive waste are required. Working surfaces should be smooth and easily washable to permit effective decontamination if necessary. Good ventilation and detectors for monitoring radiation and contamination on surfaces or people are also typical features. Space for clothing change, lockers, and showers are commonly provided.