St. George, Utab al me: 3.5 Lincoln Kine, Kev oe) x LOT? Le 1.5 Yecquite, Kev ae? x pt 5, 1.0 Groom Mine, lev 3.4 x 107 ” 0.35 Hioche, Nev “«.}a ce™ 3 0.015 “The method used in astimating doses to the lungs is given im Appendix K. ne aessurption mace was uniforn: distribution of padiatien whieh, of course, is not entirely accurate. The criteria previously established by an 4d Hoo dangle Peasibility Committee (washington, 9.¢., duly 13, 1991 , for air eoneentratione vas “at a point of human habitetion, the activity of redioactive particles in tne atacsphere, averaged over a peried of 24 hours, shall be limited to 150 mierocuries per cubic meter ef air (correspending approxisately to s ground level gemaa intensity of *&om/ir DOL NY "The _4-nour average radioactivity per cubic meter of air, due to sus;enied particles having :.aneters in the range 0 nicron te $.0 microns, shall not exceed 1/100 ef the above; nor is it deairable that any individual particle in this efse range have an activity greater than 12~+ siecrcouries calculated 4 hours after the biart.” In the January 2C, 195. meeting of the ad Joc Committee the basis for recommending the above air coscentration was discussed. Essentially, these eriteria were eelectec by estimating the gacma dose that right be ‘Since there are better . eae oé u delivered by the ~assing of a radioactive clou