April, some of the other ships anchored off Eneu Island reported small amounts of light, secondary fallout as follows (Reference 7): ship Date/Time Avg. (mR/nhr) Max. (mR/hr) COCOPA 26/2200 2 4 MENDER 26/2100 2 4 LST-1157 26/1930 2 3 SHEA 27/0730 3 5 Considering the location of RECLAIMERrelative to the ships reporting fallout, it is assumed RECLAIMERwasexposedto similar fallout. The topside radiation environment on RECLAIMER due to Shot UNIONfallout is depicted in figure 3.1 and is obtained by averaging the environments reported on the other ships anchored in the Nan anchorage. - Being a surface (barge) detonation, Shot UNIONsignificantly contaminated the lagoon waterin the vicinity of surface zero (Reference 8). Most of the surface contamination spread to the west and southwest; however, by 1 May, even the water in the Nan anchorage off Eneu Island showed increased radiation levels (Reference 7). Because of the contamination in the northern lagoon, Project 3.4 mine recovery operations did not begin until the afternoon of 28 April when RECLAIMERbegan hoisting the mines from their underwater moorings. Mines that displayed sufficient damage to conclude that they were neutralized were cut loose and allowedto fall back into the lagoon. Those mines visually undamaged were hosed downto reduceradioactivity prior to being brought aboard RECLAIMER. Special clothing, gloves, and equipment were used by personnel who handled the mines (Reference 10). By 1 May,the majority of the mines had been recovered and those mines to be shipped back to Pearl Harbor for further analysis were transferred from RECLAIMERto LST-1157. RECLAIMERcontinued searching for “lostmines on 2 and 3 May; however,there is no indication that more mines were recovered and transferred to LST-1157 after 1 May (Reference 3). At 1445 hours, 4 May, RECLAIMER,having completed mine recovery operations, departed Bikini Atoll enroute to Guam. Daily contributions to the integrated free-field radiation environment on USS RECLAIMER(ARS-42) resulting from Shot UNIONfallout, shine from contaminated lagoon water, and from ship contamination during the period 8 April to 31 May 1954 are summarized in table 3.1.