b. Issue-AornonCrypt Cuidance: There is not enough radiological data available at this time on which to formulate a definitive stand; however, the group indicated that the 40-80-160 pci/gm guidance was not intended to be applied to special situations such as this crypt. What they would like is further information reference the radioisotopes, materials and levels of activity present. The group was fully aware of the necessity of positive guidance being issued as quickly as possible. Issue-Soil Clean-up Criteria: The group indicated there c. was no doubt that the 43-80-160 pci/gm for residential, agricultural and picnic islands was precise, i.e., that every effort has to be expended to reach thsse leIJe?s. Only if it is clearly shown that these ?QVe?5 can’t 52 r~a~fi~dshould a reconsideration be made. d. above. Issue-.,-*. ~-~~+saness of 40-80-160 pci/gm: covered under & f. Iss.u+Fm-=h Cr~&~ ...rion Category if can’t meet 150: see above. .. 9“ 15S’J2-53T;3C2h>t s~ots and minimum ar~a levels: The preIiminary ‘Ji?wwas that the minimum area which should be considered fcr sur:ace clem-up cf a hot-spot was that area covered by one i.e., 9!3% Gf a 25 meter square. This was based upon treatlh\PViW, ment of data and analysis by the lXIEcontractor (Desert Research Institute) and was believed that it would result in the necessity for removal of less s~il and would be more beneficial than averaging over the fractional hectare area as presently done. C h: Issue-Subsurface cont~ination: Subsurface Contamination is that radioactivity below the depth recorded by the IMP system, . ., below about 2 cm. The group was not ready to offer guidance &ause of the importance of this issue and the absence of several members. However, they recognize the need for early guidance and discussed several possible approaches. The general concept was to determine some procedure that would take into account the intended use for the island (residential, agricultural, picnic), the depth at which the hot spot was located, and the concentration (pci/gm), i.e., have an averaging factor as a weighting factor. The preliminary view was that when a subsurface hot spot was found (greater than 160 pci/gm) several core samples should be taken in a circle around it to the depth of highest activity in the profile sample and the average concentration determined in the core samples. 3