ASSIFICD sy YNCL _—— ot z EF TO: ; T. L. Shipman, M.D. 3 DATE: 16 June 1953 mi : i ¥ A The measurements showed that when an unshielded G, M. tube ae is placed about 1" above the soil spread to about 1/4" thick- 4 2 - ness, the Victoreen model 263 shows about 1 MR. per hour i i s 3 ; 4’ activity. . Though this cannot be evaluated in a precise way it would seem that moistening the soil would be desirable, This excerpt includes all of the information relative to conditions on the island of Engebi that is contained in his report. HéShortly therei after, another survey was made by Gen. Cooney and Mr, Aeby. The following excerpt from their (Confidential) report to Mr. Curtis, dated 22 March 1950, contains all of the information contained in their report relative to working conditions on the island of Mmgebi, i The islands were surveyed with MX-6 monitoring instruments sensitive only to ganmas. The permissible weekly dose at the present time in the laboratory at Los Alamos is 300 milli- : roentgens (MR.) per week, With the present work week at Eniwetok of 54 hours, the maximum dose rate for continuous | exposure is about 5.5 MR. per hour, ENGEBI 3/17/50 em. The entire graded area within the 1,000 foot radius from zero was found to have an activity below 1 MR. per hour for the : most part. r eeee ae)eoers ad No indication of the position of the old tower base could be ‘ ORM 255 SOM 6-82 - detected with ‘the instruments. The metal scrap mentioned in Shlaer's report of 1 March 1950 has been removed to the lagoon side, well out of the working area. UNCLASSIFIED ~~ -z,_ The grading operations on Uh island have been completed,