Document BRV8gz9ZYaJwnL1D15VKKOeVw

ES 3662 BEV. I'2 -.85 ESTAIIUSHSO1602 E> I. d u Po n t d e Ne mo u r s S Co mp a n y mCORPORATED Ha s k e l l La b o r a t o r y f o r To x ic o l o g y a mu In d u s t r ia l Me d ic in e P.O. Box 50. El k t o n Ro a d Ne w a r k . De l a w a r e 1 971 4 c e n t r a l r e s e a r c h a n d d e v e l o p me n t d e p a r t me n t D.L. WICKERSHAM FABRICATED PRODUCTS DEPARTMENT B-5237 G.A. Hapka, LEGL, D-7090 R.L. Waibel, AfD, 8-9528 A.M, Sarr.if F.X, Phillips May 6, 1987 POTENTIAL TOXICITY FROM BLACK DUCK CONSUMPTION (RE: Your request for comments of 4/30/87) Haskell believes there is no significant toxicological risk to individuals consuming black ducks fro the Lordship area. We disagree with Dr. Herb Wilson's letter of 4/27/87 stating "40 ug of lead per day Is the threshold value for human lead poisoning". Total lead intake ranges from 20 to 1,000 ug/day worldwide with no apparent toxicity [1,2], Dr. Wilson's letter should have noted that human blood lead levels of 40 ug/100 mL and below are not considered harmful in adults. Children appear to be more sensitive; blood lead levels of 80 ug/100 mL can produce toxicity [1,3]. While blood lead level has been used as an indicator of lead exposure, there is no conclusive evidence of a quantitative relationship between lead exposure and blood lead level in humans [1]. There is no evidence that consuming lead contaminated waterfowl presents a risk to individuals [4]. Assuming Lordship black ducks contain 10 ug/g (parts per million) of lead in edible tissue, and an individual consumed 100 g of this tissue (0.2 lbs), their intake from this source still would fall within the nontoxic range [1,2]. Please contact me (366--5574) if you have any questions. RGS/lcp/16 RALPH G. STAHL, JR. DUP040011195 / REFERENCES [1] Xsuehiya, K. (1986) Lead. In Friberg L, et al, (eds) Handbook on the Toxicology of Metals. Vol. IX, 2 ed, Elsevier, Amsterdam, 704 pp, [2] Ctoyer, R,A, (1986) Toxic effects of metals. In C.D. Klaassen et al. (eds) Casarett and Doull's Toxicology, 3 ed. Macmillan Publishing Co., N,Y. , 974 pp. [3] Wegner, S, (1976) Shoshone Lead Health Project. Idaho Dept, of Health and Welfare, Boise* Idaho. [4J Jordan, j.S, and Bellrose, F.C. (1951) Lead poisoning in wild waterfowl. State of Illinois, Dept, of Registration and Education, Natural History Survey Division, Biological Notes No. 26, Urbana, Illinois. DUP040011196