if ae a | oe oO hee Atolls were monitored with GM counters and ionization chambers, The values reported are those of the GM counters without shield unless otherwise noted. In the control area, Likiep, counts of sand averaged 21 per minute and of vegetation, 27 per minute... At Bikini Atoll, the counts of sand and of vegetation in general were from one to three times the Likiep values except for isolated spots where oil scum and drift items from the target fleet counted as high as 100,000 c/m. At Eniwetok Atoll the activity of areas 7 to 14 miles removed from the Shot Islands was comparable to that of Likiep. For those areas near the bombsites, activity was greater than 100, 000 c/m in limited areas. At the bomb site, activity was high but in the three hundred-yard area the activity was equally great or greater but with a rapid decrease from that area outward. Activity contours are presented for the shot islands - Engebi, Aomon, and Runit. pha i ey b ade Wt PRES tesa he Seip a RUN eae ROTOR ot he Jee . wa ‘ sala ‘tet OeRE ae ee a 1B Re Re Se Areas in the vicinity of collecting stations at Bikini, Eniwetok, and Likiep ¥ Vee7 ze ~ yooady A Rr Activity contours of Runit Island are shown as a portion of Figure1. SUMMARY . re On Runit Island the activity at 700 yards and beyond was less ia i & e saat ot 4 "os than 200 c/m. Wes Engebi, and Aomon. : The pattern on the southeast side was similar to that found at the other shot islands, wr mo” to a high of 64,000 c/m at 375 yards before beginning to decrease rapidly again, 2 and 34,000 at 150 yards; 47,000 and 34, 000 at 225 yards; 5, 300 and 40, 000 at 300 yards; and 2,100 and 64, 000 at 375 yards. On the northwest side activity dropped off rapidly, while on the southeast side activity decreased and then increased again -" eck lowed by c/m on the southeast side were 74, 000 and 100, 000 at 75 yards; 40,000 uu The readings translated to c/m on the northwest side fol- 4 a SPHf the point of detonation. Veen so it was possible to monitor for about 400 yards in a northwest direction from a island was not as close to the northwest end as on the other two shot islands, and ea if wo The bombsite on this Sea The shot island of Runit was monitored August 15. 8, wh 2Qo. ' The highest count was 700 per minute upon debris in a junk area. mM Ts ae to 200 c/m. , -36- en oe AECD-3446