September 10, 1982 RISK COEFFICIENTS Both BEIR I and BEIR III risk coefficients are used. follows: These are as BEIR I Cancer--Minimum: Absolute risk of leukemia (26 x 107 rem!) + 30 year elevated risk for other cancers (61 x 107& vem!) = 87 x 1076 rem™!. Maximum: Genetic Effects: Relative risk of leukemia (37 x 107& rem-!) + lifetime elevated risk (421 x 107© rem-!) = 458 x 10-© rem7!, 0.2% per rem in first generation. BEIR Til Cancer--Minimum: Absolute lifetime risk of cancer for continuous exposure, 67 x 107® rad7! (low LET) based on linear quadratic model. Maximum: Relative lifetime risk of cancer for continuous exposure, 430 x 107® rad-1, based on linear model. Genetic Effects--Minimum: Maximum: 75 x 107~© increase per rem in first generation. 5.0 x 107°© increase per rem in first generation.