March 26, 1953}.

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GG-20032 ESTABLISHED1802 E .

ILeaiidl toccEliiiisltipficB FE L IX EDGAR W O R M S E P ,pr e s id e M .

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MEMORANDUM ON THE CONCENTRATION OF LEAD WHICH SHOULD BE MAINTAINED IN THE AIR AT GROUND LEVEL; AT AND BEYOND THE BOUNDARIES OF AN INDUSTRIAL ESTABLISHMENT FROM THE VENTS AND STACKS OF WHICH LEAD COMPOUNDS; AS VAPORS OR PARTICULATE SOLIDS; ARE BEING EMITTED 1.

(1 9 ) September 1, 194j5 Mr.

t h e a s s o c ia t e d e t h yl c o m pa n y l im it e d jlegistcrvdOffice; TH E A D E L P H I, LOIiDOST, W C .2 ' ^ LUress a ll communications u n tilJ u rth er notice to: A R T IL L E R Y H O U SE , A R T IL L E R Y ROW , L O S D O I , S.W. 1 J elep h cm c: a b b e y 3 9 7 4 . - 7 3 eleg n zm s: e t h y l p o r t , s o w e s t .

Diamond Alkali Company ResearchandDevelopment Department GENERAL OFFICES 3 0 0 UNION COMMERCE BLDG CLEVELAND 14.

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/ CLARENCE E .

9 5i < h e l l P e t r o l e u m C o r p o r a t i o n HEAD OFFICE SHELL BUILDING Shel l Buil ding ST.

ti I Name: Material: Urine and Blood Submitted: 11-7-60 by Dr.

Fi s h b r Boiz>y No r w o o d Di v i s i o n Ge n e r h l Mo t o r s Go r po r h t i o n N o r w o o i d , Oh i o Ju n e 13 1935* D r .