IV. Subsurface Plutonium. Based upon study of the history of test operations and upon soil profile data reported in NVO-140, it was concluded that no soil removal action was necessary to meet the requirement of Paragraph 4b(4), 600-77, Tab E, App2, Annex C, OPLAN No single subsurface sample exceeded pCi/gm. or IV. Subsurface Plutonium. Based upon a study of the history of test operations and upon soil profile data reported in NVO-140, a diligent search was conducted to locate subsurface concentrations exceeding 400 pCi/gm. Those located have been excised and removed for disposal in accordance with OPLAN 600-77. Or IV. Subsurface Plutonium. (If known concentrations are left in place, or if suspected locations are not investigated, a special statement will be tailored to the conditions which are known. ) The above conditions being consistent with the objectives established by the CTG Enewetak, the cleanup of Island complete, Date 1. . ( ) is considered Project Manager OPLAN 600-77 defines surface soil concentration as follows: "The apparent concentration on the surface, as viewed by in-situ detector. In reality, this is a complex function of the distribution of Pu in the ~ top few cm of soil. Normally expressed in pCi/gm." . oa