Table 9. Comparison of doses from cistern and groundwater sources Annual federal guide® times 30-yr dose for whole body and bone marrow Whole body 15 rem 0.12 0.73 Lil 15 rem 2.7 7.3 0.22 15 rem 0.19 1.5 Integral 30-yr dose (rem) i201 0 uel Water source Whole body Bikini cistern 1.9 Bikini ground 0.41 Eneu ground 2.9 a b (-3)° (-2) to federal guides. Bone marrow 1.1 (-2) Percent of 30-yr guide Bone marrow : . Annual federal guide for a member of the population is 0.5 rem for whole body and bone marrow. ; Numbers in parentheses refer to exponents, e.g., -3 1.9 * 10°.