REPORT OF THE PROGRESS OF AN INVESTIGATION TO DEVELOP A STANDARD FOR THE TOLERABLE CONCENTRATION OF IEAD IN THE AMBIENT AIR '' ' 'A' ' '' The American Petroleum Institute - Project L-6 Lead Industries Association - Project LH-75 THE FATE OF INHALED PARTICULATE LEAD COMPOUNDS ; IN THE HUMAN RESPIRATORY TRACT 1 Prepared by , Robert A.

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June 3, 1975 Room 21 Box #22 - Original analytical records Box #25 - Original analytical records Box #26 - Original analytical records m m -Box #23 - Original analytical records of and Daily record books on following subjects: 1 - 6 - 59 to 9--18--61 9- 19--61 to 6 --24--62 4--2 1 --50 to 2 -- 3--54 2 -- 4--54 to 2 --25--56 2 --26--56 to 3--1 1 --58 3--1 2 --58 to 7 -26--58 2 --23--47 to 4--13--49 2 --1 2 --53 to 1 2 - 6 --54 1 --1 0 --55 to 1 1 -30--56 1 2 -- 1 --56 to 6 -15--58 2 --2 0 --53 to 4 -26--53 4--27--53 to 7 -31--53 9--30--63 to 1 0 -17--63 6 -- 6 --51 to 4--16--53 4--17--53 to 6 -2 0 --56 6 --2 1 --56 to 7-17--58 7--18--58 to 4- 5--59 3-- 7--60 to 1 - 3--63 1 -- 4 .-63 to 1 0 -17--63 6 -- 4 .-51 to 8 -19--51 1 1 -- 6 --67 to 1 2 -13--68 3--19--63 to 9-1 2 --65 9--13--65 to 6 - 8 --66 3--19--53 to 7-31--53 3-- 5--66 to 8 -18--67 3--19--63 to 9-J5rr63 1 0 --2 2 --63 to 1 1 -29--65 1 1 --30--65 to 3-23--67 3--24--67 to 6 -16--6 8 1 0 --17--60 to 1 0 -2 0 --62 1 - 63 to 1 0 63 5--2 0 --57 to 1 2 -16--58 1 2 --17--58 to 5-2 1 --61 0005644 N7388 , - Box of graphs - taken from De.

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M.artjs ville TOk io April 1, I S k y Dr Robert A ICehoe University of Cincinnati Kettering Laboratory of Applied Physiology Cincinnati Ohio Dear Doctor Ilehoe: Thank you for your very informative letter of Larch 2c. vie would life to have our research man stop down to see you and discuss our problem in more detail.

ETHYL CORPORATION Ho u s t o n P l a n t March 2 9 , 1973 PLEASE ADDRESS REPLY TO: BOX 472 PASADENA, TEXAS 7750!

January 17, 1938 Mr* Alan C. 1?

Jamary li}.* 1937 MMAE36true8h,lsybtCAlorauloGalrlninlaaiesnG,os,lCinTs,etur1leClyeotrporation Dear Mr* Tully?

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DIVISION OF POMOLOGY R IC H A R D W E L L IN G T O N , CHIEF IN RESEARCH H .

Mc DEEMOTT, ENRIGHT & CA PENTER JAMES D.

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