using recovery rates, and essusing « decay exponent eof -}.2. Infiviéual stations, such as the one on Site Charlie, may show a reduced azount of exposure because it is near the lagoon. ‘The accuracy ef the residual gama data presented in this section is within +50 percent. The data fron this project are presented te indicate the approxi- mate magnitude ef the residual gamma radiation to be expected from different types of nuclear weapons. It is felt that the objectives of the project vere net, with the exception of Shot Cherokee (for which insufficient data wee ebtained to form definite conclusions). In the case of Cherokee, the burst point wes approxizately & to 5 niles in the dowmwind direction away from the planned ground sero; this resulted in no downdnd stations to docunent residual refistion fron “* fallout. The ground zero for Shot Tews was moved frou its planned location off Site Dog to a location ‘approximately between Sites Cuarlie and Dog. It was therefore necessary to improvise stations at available iocations en the man-made islands anf the reef between Charlie and Dog. Date points were obtained at Gisteaces af about 3,000, 7,000, and 10,000 feet, Where the initial could be separated from the residusl refiation. The initial gamme instrunent stati locations were selected with om expectation of 50 percent loss per shot; hovever, the losses were only about 25 percent. effective. ‘The residual instrumentation was nearly 100 percent The secondary and improvised instrusentation for separation of initial from residual gece redistion were only about 40 percent effective throughout the operatisn.