Document o9vVpeMDYbwxzpGOLD2Q99d5X

'Salt Lake City*. -Utah, 3ulyl% 109.. Dr. E. H, Sehresk, Chief Chemist ..-,;. Health Division, f* S. Department of the Interfax* JtSQQForbes Street .Pittsburgh, Pennsylvania . .. . .: .... Dear Dr. Sohreck: .' ` - : 7.' . . . . ' ` ' r.~ ' ' ' - ! ' ' - Toar letter of.July 11th concerning a statamat ea;tb tlrssbol'l Halt of lead mentioned in Sr* Esteems patter before the. Sortfeestem Esivsrsity, - Medics! School is September, 193? tiaa forwarded to me bes is. the field. '.Tills is the second time that my attention has been called to the fact that ^ Dr. Kehoe M s quoted as as statins that approx!sateiy three ial-lli.3raas of * lead per ton cubic meters of air has been substantially established as the threshold of toxicity of inhaled lead. As you bhcsr, our tentative liait of toxicity for lead os established as a .result of the is&d; storage Mttery study conducted by our division is. 1933? and the figure is 1.5 milligrams in ten seM o asters of air ae determined under the conditions of ear study. At no. tins have ae ever deviated in any of our statements from this figure. It nay 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, end although our findings have as jet not been published, preliminary analysis cf the data corroborate the findings of our earlier study with reference to tbs threshold limit. . .. . . .. Perhaps Dr* Eeihoe obtained the impression that throe siliigramsh^s, our suggested limit froa listening to a talk X-ascoqiave-in Indiana heft8?@ the. General Motors Physicians, on the occasion of",oar being together oa the At that tisso'X stated that cur tentative t-.for lead was 1.5 . milligrams, but my experience in many of the lead using industries indicated that the concentrations were so high, that extensive reduction,in lead poisoning could be effected if concentrations were reduced to three, or even five milligrams* However,' I also recall adding that complete;elimination, of lead poisda^l^,,?pcitldl not be attained uni03a load concentrations were reduced to approsiaatPly one or two miHigrams, since confidential information which X . tsd at that time on the experience of a British Accumulator Plant indicated ' that lead poisoning still occurred with concentrations slightly above two milligrams* . I aa sending eopy of this letter to Dr* lichee, who X .am sure will be interestedj.in.,knowing ay views os the subject ,es.d bo will be Just as desirous of knowing the facta as you are. . ' ; ; n>- peraoSS^Pl^X1 aade ^ seif clear in this matter* and with kindest Sincerely yours mm JJ3:XJS X^^^lodsfield ^unitary Ssgineer