Radioactive packages, stock vials, syringes and other “primary” containers used to hold radioactive material must be labeled with the radiation symbol and the words “Caution, Radioactive Material.” The labels include required precautionary information such as radionuclide, activity, and date. Additional information may also be provided such as dose rate at a specified distance and the chemical form. There are some exceptions to labeling for quantities less than 10 CFR 20 Appendix C limits, if approved by Health Physics and if the material is supervised by a trained individual approved to handle radioactive material by Health Physics. Other labeling exceptions include biological samples such as urine, blood and tissue submitted to a clinical lab for analysis.