Prior to the departure of personnel from the site area, they will discard bootees and gloves whennotified by the group monitor. On arrival of personnel at either check point, they will be cirected by the supervisor and by appropriate signs to the personne!-decontamination station. On entering the personnel-decontamination station, each person will obtain one paper bag for valuables storage and will then proceed to disrobe as indicated by the signs in the station. Clothing will be discarded, as removed, into the appropriately marked containers. Personnet will then enter the shower room, place their valuables (in paper bags) on the appropriately « marxed shelf, and proceed to wash themselves thoroughly using soap and water. Personnel will be instructed to pay particular attention to the folds and creases of the body as well as the hairy portions of the body. When the shower is completed, personnel will enter the drying room, dry themselves thoroughly with a towel, discard the towel in an appropriately marked container, and be monitored. If passed, personne! will then retrieve their valuables and pro- ceed to the dressing room, where their passage through the station will be recorded by the supervisor on the appropriate personnel-decontamination log sheet. If necessary, first aid for minor cuts and bvuises will be furnished after leaving the drying room. Personnel not passing the monitor at the drying room will reenter the shower room for another shower, obtain another towel, and be remonitored. Personnel not passing the monitor for the second time will be referred to the supervisor, who will take necessary action. F.5.1 RADIOLOGICAL DECONTAMINATION OF HELICOPTERS (MODELS HRS, H-19, OR S-55) Purpose . This project was undertaken to determine an expeditious helicopter-decontamination method which would allow high availability in contaminated areas and would be especially applicable for shipboard operations. F.5.2 ° vi F.5 Preparation The aircraft were monitored with an MX-5 beta-gammaradiac meter for contamination at 30 reference points, with readings being noted before and after each type of decontamination process was employed. In some cases the aircraft was stripped of cowling, and in others, only partially. The main rotor blades were removed in al] cases, and the starter and magnetos were covered, After the first method used, it was found necessary to seal the radio compartment to prevent water or steam from damaging this equipment. F.5.3 Methods Employed Steam: This method is especially good for cleaning grease and ot! from metal surfaces. However, the extreme care which must be exercised around seals, electrical and radio wiring, applied by means of a suction spray gun; this was foliowed by scrubbing with a brush and washing with fresh water. This process removed grease and oil, did not harm internal or moving parts, and was relatively fast as well as effective. Kerosene and Water: This method was applied by spraying kerosene over the contaminated object and letting it remain for 1§ min before washing with fresh water. This process removed grease and oi! and did not harm moving parts. However, after the rinse a film of ofl remained, which could be the meansof collecting further contamination. Fresh Water: This is effective against loose dirt but will not remove grease cr oil, which holds the majority of contamination. 86 Ma ignition harness, and moving parts makes it impractical to use. Although this method is the most practical for shipboard use, its damaging effects preclude its use. Tide Slurry and Fresh Water: A mixture of Tide detergent and water in a1 to 1 ratio was