62 © The Containment of Underground Nuclear Explosions Figure 4-2—Controtlable and Uncontroilable Areas Uncentroliable . Controliable --—---— Nellis Air Farce Base La range -— 1 Sealetagalerie oo co lavetye 8 *, rhe a ve oe haaannnaby es . The controliabie area is the region within which remedial actions are considered feasible. SOURCE: Modified from Environmental Protection Agency. 170 mR/year level. [f 0.17 mR/year (the maximum extemal exposure allowed during a 12-month period for an uncontrolled population) or moreis predicted to fall outside the controllable area, the test will be postponed. Within the predictions shown in tigur 4-3, the test could be conducted if EPA monito: were prepared to be at each of the ranches. mine and other populated areas within the dispersic