1. The Mobile Radiological Laboratory (MRL) is a compact environmental survey laboratory built on a bus chassis to enable rapid deployment in the event of a radiation emergency or accident. 2. The MRL is equipped with instrumentation for environmental monitoring including systems for measuring radiation levels, identifying radionuclides, and assessing internal contamination. 3. Special equipment on the MRL includes a shielded chair for whole body counting and in-situ gamma spectrometry systems for soil analysis. Computers network the data collection and portable generators power the instruments during field operations.