2. sequirements. ‘a. .fter .ach shot, dbcfore a ship asy reenter the Lagoon, surface sammles mist bo taken of that wart of the lacoun wherw the ship is expected fo go, and a determination ande that the watcr in that irea ts not excessively radicactive. b. Since primary fall-out is possible from H Hour to about H plus 4 hours, the first water samples will be taken at about H plus 4 hours. Ge If TARE is not contaminated at H clus 3$ hours, sur.ace samles will be takon at wator sampling points 1, 2, 3, &, 5, 6, 7 am 8 starting at H plus 4 hours. about two hours tine, This should require two heliconters anc The samples can bu measured in less than cne hour, and ( measurements permitting) ships proceed through Enirrikicu Pass and to arca just west of NaN by about H olus 7ours. ad. Surface samles at water sampling points 9 ami 10 aust bo taken before ehips enter the arca southwost of HOW. e. Water samling will bo dcno orimarily to orctect shiss ant f. It is cstisated that on D day two helicopters will be ge after D day water samples will normally te taken as follows: secundarily to obtain data on currents in the lagoun. needed from H plus 3$ hours to sundown. (esswsing ENING Islami ant Water Samling Pointe 1, 2, 3, 4, am 5 are not contaminated): (1) Points 1, 2, 3, 4 amd § by boat. (2) Points 13, 14, 15 ami 16 by heliconter. require one helicuxter for about two hours. This will (3) Other points by helicwpter if available, am. by boat if no heliconter is evailable, “he. High priority will be given to legoon water sampling ree quirements because the operation desonis, among other things, upcn ships being in such ccmiition that >orsemmel can atay aboard without receiving oxcessive rediaticn. 3e Goneral (ENIWETOK). a. Water samples will bo taken from ENIWETOK Lagoon similar to the plan used om Oporation IVY. olen is attached as .opendix I, arpendixs %.= ENTWETOK Lagoon Water Sam) Por surposes of this documcnt the IVY Plan (Opn IVY) GuB7%aI( 2)