G a Hy pCi lung burden of insoluble alpha emitting particles will give rise to significant adverse healtn effects for lifetime exposures. The typical burden of insoluble particles of respirable size diameter) (<« 5.0 Um is about one gram in human adults. For this reason I would recommend that surface soils should not exceed about 1 pCi of +" pu, and other insoluble alpha emitting particles per gram of insoluble particulates of respirable size in the @irborne dust resuiting from the disturbance and resuspension of surface soils. On this basis even the Colorado standard may give rise to excessive organ burdens. Drs. Cochran, Tamolin and Geesaman all raise the same or similar objections to the DEIS plutonium standards. . ‘Further explanation of the plutonium cleanup criteria developed by the AEC Task Group is necessary. to III-1l1.) (DEIS, Vol. II, Tab B, pp. III-8 We have already mentioned the questionable wisdomof the 40 pCi/g standard. For any concentrations exceeding 400 pCi/g the Task Group recommendations require removal-of the soil. But in the range between 40 and 400 pCi/g, the DEIS standards call for “corrective action ..... on a case-by-case basis." p. III-9.) (Vol. II, Tab B, Certain criteria are offered for guidance in the exercise of this judgment, but they appear to be entirely too unspecific and subjective. Once a decision is made to take correc- tive action, \>