( at debris to be present at these sites having exposure rates exceeding 2 mR/hr. Additional radiation areas will be established during Cleanup as appropriate based on radiation measurements to be made. Controls on an island will not be removed until the island is certified as clean. -D. RADIATION PROTECTION STANDARDS. 1. Sm Te bows A "radiation worker" is an individual who might be exposed to more than 10 percent of the basic radiation protection standards (See Enclosure 4) as a result of his employment or duties in a controlled area. - An "occasionally exposed individual" is one whose work is not normally performed in a controlled area and whose duties do not ‘normally involve exposure to ionizing radiation; however, the individual may have reason to enter a controlled area in the performance of duties. Occasionally exposed individuals will not receive an exposure to ionizing radiation in excess of that allowed for any individual in the population at large. 2. ‘Essentially all of cleanup can be accomplished by personnel categorized as occasionally exposed individuals; accordingly, the majority - of the workforce will be treated as such insofar as radiation limits are concerned. Personnel working in radiation areas, however, conceivably might exceed the exposure limits set for occasionally exposed individuals. Thus, work on these sites will be assigned to the personnel having the most exper- ience with radiation and qualifying as radiation workers. . E. MEDICAL EXAMINATIONS. eee — : sy 3 1. Preplacement and termination medical examinatione wi1l be given to all cleanup personnel. The examinations will include a review of prior occupational exposure and a description of any unusual exposure resulting from previous occupations, accidents, incidents, or therapeutic procedures, for the purpose of evaluating an individual's acceptability into the cleanup operation. 2. Plutonium represents the greatest radiation hazard facing Cleanup workers. Although plutonium at Enewetak is harmless while it remains outside the body, it could cause deleterious effects if it enters the body. Precautions will be taken to prevent the inhalation or ingestion ofplutonium, but a bioassay program will be prescribed to | monitor the effectiveness of the precautions. . ees 3. te . =: : ae . elas te wire ot The principal bioassay method will be urine analysis. Urine samples will be taken on a periodic basis to includéthestart and end of assignment from all workers who at any time are in the vicinity of plutonium contamination. ‘Urine samples will be analyzed for plutoniun at the USAF/Radiological Health Laboratory, or a comparable laboratory, to a sensitivity of at least 0.3 pCi. If positivereadingsshould be obtained, additional bioassays; e.g.,_ fecal analyses_o or lungcounts, willbe prescribed._ a 13 ol ctmweretct \ omc ocSTR Tt Lo cee 4bet “+ Re so ae 16 hd RR