Document XwVdm8Nd9K1v61DGqxRo0Mny

Medical Dept., A2SA July 23, 1971 Mr. r.. v. John C2SE Mr. Mr. Mr. Mr. Mr. J. R. Eck - DIG John Mason - Dish W. B. Papagaorge - o2SK C. J. Smith - U1SA E. P. Whaalar - A2SA Thora la a good probability that ona of tha questions va will b askad concarning tha aaal episode is, "is thora any hasard to aatinq chickens with PCB in their tissues?" While it would ba more appropriate for this question to ba referred to the Medical Department, in uany instances it would probably create a better impression if the question were answered iamediataly. We do not know what levels say be found in those chickens but if we assume the wary high level of 100 ppa, I think va can unequivocally state there is no hasard unless humans were to eat such a diet for eonths. The dose to cause lethal effects in rats is between S and 7 qAq- In a 100 pound wosuin this would be about 4 ounces of PCB. Rata have bean fad loo ppm in their diet for 24 months with no ill effect. Dogs have, likewise, had the sane amount for the sane tine with no ill effaet. It should be brought out that tha danger in PCB relates to fowl, inasmuch as it disturbs thsir sgg laying and hatchability characteristics, rurthcr, any poaeibla affacts to huaans would ba associated with very extended periods of ingastion and not for a period of one or two weeks. ilEli/ln R. Emmet Kelly, M. D. MOMS 099663