i STat || gableX the,values:for: the. water. samplesexpredséd in. @/a/mt t 7 ea . "Whole water’ samples were.used for counting, 1.¢@,, none a _agtivity. aminute per. kilogram for potassium-40 are 560 and fer all other For ceeanwaters, theatomie disintegrations per natural-cecurring isetopes about 10." ‘This means that the con= tribution of natural-occurring isctepes to the values in Appen- dix Table X for lagoon water samples ranged from 0.6 to 1,2 aff. Beeause of the relatively ereat counting error of the legoon water samples neither the rate of decline nor the decay rate was estimated, .4 va Be ee | * vee bie : 7 RaeaeEE on oR ,80.the values in the above table are these for total radice«~ ee (of the natural-ocourring radiolagtopes were chemically removed, a a * ae 7 | : ragRETE open me rng cia "0.95counting error aregiven... °° ~- A conservative approximation of the radioactivity “ah x Ra & of the lagoon water, based wpon the average difference between the observed value and the positive 0.95 counting error for sd the January 26-30, 1955 samples, is 2400 d/m/t (.0011 uc/i). ing water was taken from an open can on Enisetok Ieland and the ground water from a two-feot hole that was dug on Kabelle Island. The ground water was most radioactive, 48,000 d/a/l (.022 ue per liter) and may have contained radioisotopes that had leached from the soil, However, the decay rate r= t°2-35 for the period from March 23 - July 30, 1955, waa similar to that for mixed * Schubert, J., “Radioactive Poisons," Selentifie American, Vol. 193, No. 2, pp.34-39, Auguat 1955, sare 0 eseswcemgs a Tae ek ARESIR EONS, e — The stand- wwe ests) ttt filtered well water, standing water and ground water. s Be & meteriy The samples ineliude cistern water, SS Yoht ih Ps C1 Si SOR RIGASORRR FS er reliable (Appendix Table X). PESNTRSNsCeaagSrtMcog oS For the fresh-water samples the counting data are more