( county in some cases) civil defense authorities to be called in when the wardens discover a dangerous situation. This might be arbitrarily set at a gamma reading in excess of some such figure as 2r/hnr at 1 hour after the explosion (correcting all readings to this epoch). An eight to twelve man team should be capable of handling any situation which might arise due to fall-out from an air burst, but in case of an underwater burst where the 2r/hr contour at 1] hour would enclose roughly 10 square miles (with Bikini conditions of a 5 mph wind) * it would be 1. Effects of Atomic Weapons, Fig. 8.101) highly desirable to have at least two such teams present on a mitual assistance basis. On the assumption that the surveyors must reach the scene of an explosion within a few hours, a minimum of two teams per state should be organized (except perhaps in the smallest states), and in states having more than one primary target area additional teams might be provided to equal the number of target areas. The teams should not be based within the critical target area and consideration should be given to dispsrsal of their equipment. I do not know the number or distribution of critical target areas by states but guess that the total number of survey teams desirable would be between 150 and 200. The cost of equipping one of these survey teams would be rather high, but if the number can be held below 200 it should not be nearly so formidable a problem as trying to supply the wardens with instruments coming anywhere near meeting the specifications issued by the FCDA lest December. The surveyors should have instre- ments (presumably ionization chamber types) capable of differentiating between beta and gamma raya. They must be supplied with individual pocket dosimeters and com- plete protective clothing. Serious consideration should be given to supplying them with oxygen-generating breathing equipment (such as the "Chem-Ox" mask). a few of these should be available to each team. Certainly Facilities for counting of smears and dust samples (including alpha counting) and for emergency assay of water -4- DOe ARCHIVES

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