Distribution or soil sampie special interest. Locations on 2ikini and Islands. Dlaced in clastic bags with idenrifi- Eneu No. of sampie locations Surtace Proriles (0-253 em) (0-90 cm) Bikini North of second baseline N 25 2 Central section 200 4 South of second baseline S 25 2 North of airstrip 50 - South of airstrip 40 Total fo Eneu 350 12 46 samples each. to live in this section. cation tags and prepared for shipment <3 LLL wnere they were crocessed and analyzed <c. gamma spectroscony. Sam. 5 1 os 239,259 ples were znalyzed for , Pu and 90 Sx by wer chemistry methods at MeClallan Laboratory. A complete report on the analytical drocedures has been published.» BIKINI GROUND WATER PROGRAM Purpose The ground water program was designed to establish a network of well locations on Bikini and Eneu Islands to assess the ground water A limited number of profile samples were the hydrology and geochemistry of elements i: the ground water system. several samples were collected The north and south sections of 3ikini Island and all of Eneu have lower contamination levels; hence, the sampling density was lower. quality and to study systematically radionuclides and major and trace planned in this area because during previous surveys. The sampies vere Special emphasis, however, was given to the lagoon side of both islands since Water movement and residence times were to te assessed to deduce the transport rates and mechanisms of radionuclides deposited in the soil zone or taken up by vegetation. Methods and Measurements Pits were dug with a backhoe to. the homes may also be erected in these hard coral layer: the ground water areas. reservoir surface was approximately The exact soil-sampling locations 2m below the ground surface. Seven were determined by a random selection holes were drilled with a ground power process to obtain statistically mean- auger at selected locations along the ingful and unbiased resuits. centerlines of Bikini and Eneu Islands. Special samples were also collected within The auger senetrated the ground water "hot spot" areas and other areas of lens to a cepth of approximatreiy 1 to