co TO; J UNCLASSIFIED ) T. L. Shipman, M.D, DATE: 16 June 1953 decontamination by earth-moving was started, on Engebi, about 1 November 1949, with Mr. Wm, Rhodes, H-Division, LASL, on duty. During February 1950, with the decontamination work on Engebi completed, and the work on other islands nearing completion, Mr. Rhodes was relieved as RadSafety Officer by Mr. Jack Aeby, H-Division, LASL,} and another survey nw. —— was made by Dr. Simon Shlaer, starting 25 February; The following is excerpted from his report (Confidential) to W. A. Curtis, AEC Resident Engineer, dated 1 March 1950, The islands were surveyed with MX-6 monitoring instruments sensitive only to gammas. 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 — 25 February 1950 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. At the outermost edges of this area occasional spots with 1.5 MR. per hour can be found, No indication of the position of the old tower base could be detected with the instruments. Metal scrap with activities as high as 3.5 MR. per hour can be found just outside the graded area, both seaward and along the sero line, Top soil samples from the vicinity of the location for the new tower were collected and beta activity of this has been measured to evaluate the necessity of moistening the soil ; f PORN 258 50M 6-52 during operations there, UNCLASSIFIE | 7