ground is not a hazard, but if the ground is disturbed, personnel may come into contact with the Pu and be harmed. Persons operating in the vicinity of the disturbed ground might either inhale resuspended Pu directly, or become externally contaminated and susceptible to subsequent internal contamination of themselves or others. A111 Cleanup operations which disturb Pu-contaminated soil will thus be performed by personnel adequately protected. 2. The protective clothing prescribed for Pu operations may range from shoe covers and a surgical mask to a full compliment of shoe covers, coveralls, or air lines. gloves, head covers and facepieces with either filters Although it is proper to don adequate protective clothing, there are numerous reasons for not overdressing. For example, full- suiting may be intolerable when worn for extended periods in the warm, humid climate indigeneous to Enewetak. The "protection" provided by the clothes could in fact cause harm by leading to heat injuries. Thus, there is an incentive to wear just what is necessary and no more. The proper and minimum clothing will only be known precisely following an evaluation of on-site monitoring (e.g., air samples and nose swipes) against permissible contamination limits (See Enclosure 3); nevertheless, some initial protective-clothing requirements are described below. 3. With perhaps the exception of Pu suspect areas on Runit, no surface locations at Enewetak Atoll have a sufficiently high Pu concentration that they pose a hazard to persons merely walking on them; i.e., ordinary "foot traffic" is assumed to not create any resuspension prob- Ad 19