ne ete ae ee ee fee ee ee —a. 4. The recommendations are to be used only as radiation protection guidance for presently existing cases of environmental contamination by transuranium elements and for possible future cases of environmental contamination from unplanned releases of transuranium elements. Federal agencies are not to use them as limits for planned releases of — transuranium elements into the general environment. §. Remedial actions for contaminated sites should be planned to provide maxisum protection of the public health at reasonable cost, and should be implemented with the objective of minimizing adverse impacts on the environment. 6. ; - The relationship between the projected dose rates to persons in a “critical segment of the population" and the ambient concentration of transuraniua elements in air, soil and food is to be determined on a site-specific basis, taking into account all possible environmental pathways. For purposes only of eliminating certain lands from further more detailed evaluation, a soil “screening level" of 0.2 uCi/me@ of alpha-emitting transuranium elements, for samples collected at the™ surface to a depth of 1 cm and for particle sizes less than 2 am, may be used under post circumstances. Areas which do not exceed the "screening level" generally may be considered in compliance with the recommendations; those that exceed it would require further evaluation to determine the actual dose rates to exposed persons. The “screening level® is not to be used by Federal agencies as a soil concentration limit for purposes of implementing these recommendations.