-18- Data on results of personnel monitoring reported to the © Comaission pursuant to §20.407, 10 CFR Part 20, for calendar year 1973, indicate that 67,862 individuals were monitored, 29,169 received measurable exposures averaging 0.73 rem for the year, and 3,425 individuals (11.8 percent of those receiving measurable exposures) had estimated exposures in excess of 2 rems.20/ If M in the preposed regulations were set at 55 years and X at 3 rem/year, would be achieved. the necessary reduction in cancer fatalities If the work force has the same distribution some 16% would be over 55 years old indicetes that only exposed above Ii M were ’ set at 45 and X ren/year, the cancer reduction would be achieved, and som2 373% * ula be expected to be above 45. 9° of the work force c latter case, by limiting the exposure of workers over 45 0.5 rem for workers 2 in any one vear) could receive (12% of the work 3.5 rem in the third veac. force Moreover, Since there is gecad reason to believe that the present excosures are not as low as pvacticable, the industry should noc have great difficulty in conforming to these proposed reculations. 26/°fbid., 3.75).