Document 82BzRN4RV3y00By77dXg0Gmay

Salt Lake City, Utah 3ulylS 1939'- Hr* E. E* Scfcraak, CMef Chemist Health Division, S'. S. Department of the Interfax* 4SOO J'orhes Street Pittsburgh, Pennsylvania k. Dear Dr. Sehrefik: Tear letter of.Inly lltto concerning a -statamat .ea;tii *&rssh.eM limit of lead mentioned in Br* Keboeta paper Before the. fSertfeohtera Saifsrsiiy, Kedical School in Septsober* 193?* t*aa forwarded to me has ,1a th# field. This is the second tiae that ay attention Ms been, called t the fact that Dr. Seboe Ms quoted as as statins that approximately three lailligraaa/of lead ?er ten cable meters of air Ms been mbstanticliy established a,a. the threshold of toxicity of inhaled lead. & you know, our tentative limit of tossieity top lead was*established as a .result of $%& lead storage' battery study contacted by our division in 1930* and the flours is 1.5 milligrams in ten. cubic meters of air as det&KSiu&a under the conditions of our study* At no. tins have ae ever deviated in any of our otstenonta from this figure. It aay also interest you to know that recently v;e have completed a rather extensive study in the lead storage battery. industry throughout the United States, caad although our findings have as yet not been published, preliminary analysis of the data corroborate the findings of our earlier study with reference to the threshold limit* ..... Perhaps Dp * Kefcoe obtained the impression. that three,Miligraas* ms-ms suggested limit free listening to a talk 1 - once./gave: in isdiana. befB? the- Geaeral LSotors Physicians, a the occasion of our being together on the. s&se program* At that time X stated that our tentative Halt- .for lead was. 1*5 milligrams, but xy experience in many of the lead using industries indicated that the concentrations were so high, that extensive reduction.in lend poisoning could be effected if concentrations were reduced to three, or even five milligrams* However,' X also recall adding that complete: elimination of lead poisoning would not be attained unless lead concentrations wore reduced to approximately one or two milligrams, since confidential inforsation which X had at, that time a the experience of a British Accumulator Plant indicated that lead poisoning still occurred with concentrations slightly above two I so sending copy of this letter to Dr* liehoe, who 1 sure will be interested!.in. knowing ay views os the subject .cad who will ? just as desirous the facts as you are* ; n> - ^r30J&sl:4Fllr5lftXJs^?Te sa<ie syself clear in this- salta? and with kindest Sincerely- yours JJBsJM Sloonflaid ,/Bahitary.'.Engineer.:-