f . 2 i ca contamination from fallout on aither UNION, YANKEE or HECTAR. Occoasional operations in slightly contaminated water were conducted bet without £11 effect on either ships or personel, Som VP-29 aircraft received elight contenination in their post-chet flights, as did some ef the HER~362 hilicopters, Goofy 37. The Boat Pool Lous, end the two barges, YCV 9 and Yc lel, that were customerdly moored or anchored in Bikini Lagoon during shots were agein contesinated on UNION ond YANKES, The intensities / after UNION averaged between 100 and 200 ar/hr, tut the contamination wes particularly tenacious snd wae not materially reduced by selt water flishing. Sapeated scrub-downs with strong solutions of deter gents and lye ani wire brushing of “hot" apote brought the levels doen sufficiently to perait operation of the craft on UNION plus three days, The intensities efter YANKS were much higher, with average readings of about 3 R/hr ani sane as high as 7 K/h. Initial decon~ tesination measures reduced the levals to « 350 ar/hr average, tut thereafter intensive efforts reduced thea only very alomly. Camplete deconteaninstion at this tine would have required extensive rencval of the eurface paint or rust with rotary powered wire braches, This was nob attenpteds the future employment of the craft made such an sxtenelve operation unnecessary. contenplated. Farther use of the two barges was not Ry the tims they reached Pearl Harbor under tow it was expected that the combined action of radiosstive decay ani constant Ss, \ SECRET