Dr. Henry I. Kohn 3. . 2 December 29, 1981 We had to use risk coefficients from BEIR-I (1972) because BEIR-III had not been accepted by the U.S. government. Details of how we applied these risk coefficients will follow as soon as I complete . a summary for you, hopefully within the next two weeks. I am sorry I cannot provide the details you require more promptly, but because of the press of other commitments I have not completed transferring the information from my notebook to the summary mentioned above. Sincerelyyours, W. J. Bair, Ph.D. Manager Environment, Health and Safety Research Program WJB:ms cc: J. W. Healy B. W. Wachholz W. L. Robison