Derived Guides 1. What is Acceptable Risk? ICRP - 1 chance in 100,000 to 1,000,000 per year EPA - 1 chance in 1000,000 per year 2. What is Dose Limit Corresponding to that Level of Risk? 500 mrem/yr to Max. Individual 170 mrem/yr to Segment of Population 3. What Levels of Contamination Corresponds to Dose Limit ? Los Alamos