National Lead Co.

PROPOSAL TO INTERNATIONAL LEAD ZINC ORGANIZATION FOR THE CONTINUATION, THROUGH THE YEAR 1971, OF THE FINANCIAL SUPPORT OF A PROGRAM OF RESEARCH, IN THE KETTERING LABORATORY, IN THE DEPARTMENT OF ENVIRONMENTAL HEALTH OF THE COLLEGE OF MEDICINE OF THE UNIVERSITY OF CINCINNATI, ON THE GENERAL SUBJECT OF "HUMAN EXPOSURE TO PARTICULATE LEAD COMPOUNDS IN THE AIR, UNDER EXPERIMENTAL CONDITIONS" Subtitle Project LH 160 (Present Phase of Experimentation) Effect of Particle Size In Air on the Absorption of Lead by Man The background of this investigation of the metabolism of lead in man, under a variety of conditions, over a period of years, will have been presented in prior proposals, and, thus, a repetition of their substance would be redundant.

Re said the principle source of lead in bunco environment is from naturally occurring lead in food aoureas.

They also use a 7ppm limit for lead.

PROPOSAL TO INTERNATIONAL LEAD ZINC ORGANIZATION FOR THE CONTINUATION, THROUGH THE YEAR 1971, OF THE FINANCIAL SUPPORT OF A PROGRAM OF RESEARCH, IN THE KETTERING LABORATORY, IN THE DEPARTMENT OF ENVIRONMENTAL HEALTH OF THE COLLEGE OF MEDICINE OF THE UNIVERSITY OF CINCINNATI, ON THE GENERAL SUBJECT OF "HUMAN EXPOSURE TO PARTICULATE LEAD COMPOUNDS IN THE AIR, UNDER EXPERIMENTAL CONDITIONS" Subtitle Project LH 160 (Present Phase of Experimentation) Effect of Particle Size In Air on the Absorption of Lead by Man The background of this investigation of the metabolism of lead in man, under a variety of conditions, over a period of years, will have been presented in prior proposals, and, thus, a repetition of their substance would be redundant.

. * CYWI 1-0000 N14502 Name LEAD IN BLOOD (Results underlined in black are higher than acceptable limits) Date T/2/T1 mg lead/ 100 g blood Date 7/8/71 mg lead/ 100 g blood Date 7/16/71 Date 7/20/71 Date 7/29/71 Date rag lead/ rag lead/ mg lead/ mg lead/ 100 g blood 100 g blood 100 g blood 100 g bloo Cross, E.

RE: Kehoe Lead Balance Studies in Humans . .

Raoueuofa Executive Vice fmdnt lead lodofarlee Aseorfaftoa New Tor*.

Raoueuofa Executive Vice fmdnt lead lodofarlee Aseorfaftoa New Tor*.

. * CYWI 1-0000 N14502 Name LEAD IN BLOOD (Results underlined in black are higher than acceptable limits) Date T/2/T1 mg lead/ 100 g blood Date 7/8/71 mg lead/ 100 g blood Date 7/16/71 Date 7/20/71 Date 7/29/71 Date rag lead/ rag lead/ mg lead/ mg lead/ 100 g blood 100 g blood 100 g blood 100 g bloo Cross, E.

When they find traces of lead in children - a matter which is virtually universal they speak of hazardous conditions, and fail to realize that lead poisoning in children is hardly ever caused by very small quantities of lead but is almost always induced by swallowing fairly large quantities - i.e., milligrams of lead, not micrograms.

ASARCO Incorporated Amax Lead a Zinc, Inc.

When they find traces of lead in children - a matter which is virtually universal they speak of hazardous conditions, and fail to realize that lead poisoning in children is hardly ever caused by very small quantities of lead but is almost always induced by swallowing fairly large quantities - i.e., milligrams of lead, not micrograms.

Booth President Aaax Lead & Zinc, Inc.

Lead Industries Association, Inc.