We realize full well that you, as the authority on:lead toxicity, must be certain In your findings before you can take a position for or against a change In lead alkyl.

Lead, MO-20 Lead, MO-20 Copper Mill dust Selenium Dust samples -elding fumes, MX-20 tSSl 00 East Pltts$fegh East Plttsfabrgh East Pittsburgh East Pittsfcih S.

It Is our understanding that at the time approval was received for in creasing the tetraethyl lead limit from 3 to 4 milliliters, the Los Angeles .Air Pollution Control D i s t r i c t `officials first heard about it via questions from the Surgeon General* Obviously, the lead suppliers were faced with the same question of the "hen and egg" and took the course that appeared best to them -- and now appears best to us -- of approaching the Surgeon General first* If this point can be made clear to him and his coopera tion elicited, we would plan to advise; the Los Angeles people immediately after receiving afavorable reply from the Surgeon General.

I'm quite certain that the cleaning of a rail tank car, so as to be certain that there will be no contamination with lead, can be effected only by drastic means which will remove all rust and scale down to bright clean metal.

LlM-90 Ti LEAD INDUSTRIES ASSOCIATION t (ill 4I> TCtT new re-** i, k.r.

Manfred Bowditch Director of Health and Safety Lead Industries Association 420 Lexington.

Bob: Attached is a copy of a Competitive Activity Report discussing the suspected case of lead poisoning previously reported to you by phone.

Kehoe: Attached is correspondence received from our Southern Region regarding the maximum allowable limit of the use of tetraethyl lead in gasoline.

Kehoe pointed out, these are for gasoline vapors only and not for tetraethyl lead, le are, at the present time, working with a manufacturer to make our Lead-in-air Analyser available for off-shore use.

Gilbert Say San Bernardino Toxic"'.Materials in Exhaust Gases from Leaded Fuels March 2, 1950 Files lUO 1010 20 Dear Eon: Thank you very such for your letter of February 2h* 1950, and the- suggestions contained therein.

Kehoe Kettering LaboratoryUniversity of Cincinnati College of Medicine Cincinnati, Ohio Dear Bob: I was intrigued by your discussion with me last Friday on the subject of lead intake on various sources.

Preparation of a paper covering the studies of particulate lead compounds in exhaust gas will begin immediately.

Clair, Cincinnati, Ohio Lead Analyses Analysis Humber Volume Specific Gravity iA&* Pb/Llter - 52A-81 - 150 ml - 1.008 - 0.03 i3L00i> Analysis Humber Grains Mg* Fb/lOQ Drams 52A-82 3oeo trpirra able 20.1 O.O95 Dithizono 20.9 0.09 Tho concentration c lead in tbs?

Holland, formerly Terminal Superintendent of their Chattanooga Terminal, has lead poisoning.

July 14, 1956, So Members of tbe Lead InAuatrla* Associations 8ub.1ecti Bob!