September 10, 1982 RISK COEFFICIENTS Both BEIR I and BEIR follows: III risk coefficients are used. These are as BEIR I Cancer--Minimum: Absolute risk of leukemia (26 x 10-6 rem-l) + 30 year elevated risk for other cancers (61 x 10-6 rem-l) = 87 x 10-6 rem-l. Maximum: Relative risk of leukemia (37 x 10-6 rem-l) + lifetime elevated risk (421 x 10-6 rem-l) = 458 x 10-6 rem-l. Genetic Effects: BEIR 0.2% per rem in first generation. III Cancer--Minimum: Absolute lifetime risk of cancer for continuous exposure, 67 x 10-6 rad-l (low LET) based on linear quadratic model. Maximum: Relative lifetime risk of cancer for continuous exposure, 430 x 10-6 rad-l, based on linear model . 7 Genetic Effects--Minimum: =x 10-6 increase per rem in first generation. Maximum: Lx 10-6 increase per rem in first generation.