Document pew0OJL0Q7LRqg0MGJ41g2Ydd

bcc: H. B. Papageorge 0cabi 4, 1973 Mr. Michael Uret* 1421 Monro* Straat Evanston, Illinois 60202 Dear Mr. Uratsi Your lettar concerning a possible exposure to PCB has bean referred to me. First of all, it would be interesting to know how much PCB was in the diet and how much axposura to dust you had. About as high a level as an animal can take is O.lt of the diat. A parson would have to inhalo a great deal of this feed to get a significant exposure to PCB. The dry material itself would very probably not be absorbed through the skin. To answer your question specifically, none of our people who wore exposed to PCB developed any loss or dryness of hairt however, they had no symptoms of any poisoning. As far as the medical literature is concerned, of those individuals who had an overexposure to PCB, falling hair was not mentioned. The same situation obtains in the laboratory animals treated--falling hair did not occur. excess exposure to PCB has usually occurred only where the material is volatilised into the air at elevated temperatures or where the individuals had liquid PCB's on their skin for prolonged periods of time, llere, tests of liver function were the most valuable in determining evidence of toxicity. Sincerely, REK/ln A. Emmet Kelly, M. D. Medical Director MONS 095157