OFFICIAL USE ONLY On June 11-21, 1956 another survey of radioactivity in the sea was conducted near Bikini and Eniwetok Atolls by the AFL. Since June the survey WAS conducted during the Spring 1956 test series of detonations, relatively higher activities might: be expected. Table Forty-five sum- marizes some of the jate. It will be noted that the average (see separate report) activity value for planktonis about 7,000 greater than the average surface water value. ' OFFICIAL USE ONLY 5 0 0 2 [ ty 5 7 ree rt: wee oo eon a _- | 5 Sengearccp ep agen. Dore . Sonn et eeneccrine Sit a ne Tt