standards, limits on releases of radioactivity in liquid and gaseous: effluents, precautionary procedures, waste disposal requirements and recordkeeping and reporting requirements set forth in 10 CER Part 20, "Standards for Protection Against Radiation”. Atomic energy activities carried out by the Commission and its contractors are also subject to comparable health and safety requirements and rules. In reference, then, to the first part of the statement in Question 1, the Atomic Energy Commission is responsible for imposing whatever controls are necessary on atomic energy activities to protect public health and safety, including such limits on quantities of radioactivity that may be released to the environment as may a - be necessary. Periodic evaluation of data on the overall radiological situation in the U. S. by the Federal Radiation Council and a similar evaluation on a worldwide basis by the United Nations Scientific Committee on the Effects _ of Atomic Radiation indicate that radioactive contamination from man's use of nuclear energy is much less than the radiation from naturally occurring radionuclides. All AEC sites and licensees carry out environmental radio- activity monitoring and related exposure evaluation as necessary to verify that population exposures resulting from their activities are within the standards. The scope and complexity of each program naturally varies with the nature of the site. In some cases, relatively simple monitor ing is sufficient to verify that radioactivity content of effluents is well within appropriate limits at point of release. At other sites, highly sophisticated evaluation techniques have been developed to assure that exposure to peor -e