Document bBJV2L1pvo1Ovo23o3dyBaRo0

February 21, 1939 Hr. j. H. Schaefer Ethyl Gasoline Corporation C hryeler Building Hew York City New York Dear Hr. Schaefers** , 1 am sending you herewith a few notations whioh I have made in response to the questions raised by Mr. Osborne of I.C.X* In as much as I do not know where to address Osborne* I should appreciate it If you would forward these comments to him. You mig^it, at the same time, convey to hi y regret that he could not visit us, % and my pleasure over his very kind note. X hope to have the pleasure of meeting him again and I wish to assure him, and his associates, that I shall be only too glad to give him every possible assistance. Sincerely yours, RAKjia Robert A. Kehoe, K.D. t 0010108 "' OtmaTlQMg . . *H RsaATIOH TO MEDICAL CQggftQL X. Containers for collecting urine, blood and feces, and needles for the collection of blood, should be supplied to the plant medical department'fro the laboratory in which the analyses are to be carried out# It would not be possible, otherwise, for them to be available In a proper state of chemical cleanliness. the.first requirement, therefore, is provision for such an analytical laboratory. This laboratory cannot be operated within the plant unless the most rigid pro-* cautions are taken against contamination of the laboratory space and environment with lead compounds, through isolation of the analytical rooms and by adequate, filtration of all air entering them. This, in my experience, is quits difficult of accomplish ment, and 1 would recommend that a laboratory for this purpose be situated at some distance from the plant. , hr. S# 0. Dodds, of the Oourtauld Institute of Biochemistry St the Middlesex hospital Medical School Is in position to advise with respect to the personnel and facilities which will be required for setting up a suitable analytical con trol*. 1, also, should be-glad to give say further assists,nee which may be required. The point which should be made at this time is that the analyses of biologieal materials for lead cannot be done in accordance with customary chemical routine In plant operations but, if it is to be of any value whatever, it must be done in a special laboratory, designed for that purpose, by specially trained personnel. In all probability, from three to sin months of training in methods of analysis and In obtaining and handling camples for analysis will fee required to develop adequate personnel, The location and equipment of the analytical /laboratory should fee determined* in part* at least , after- the . . selection of the person or person who are.to do the work, ' . 2* t m at some loos to understand the origin -and moaning of the question relating to a tarpaulin shed for. cleaning a workman who may 'fee contaminated with tetraethyl load or Ethyl i ' fluid, Any an who might fee splashed or otherwise 4mt with such a liquid should be washed thoroughly with kerosene and then with coap and water immediately, Oontalnar with kerosene and emergency shower bathe are scattered about in various parts of the plant. These would fee used promptly in case of accident so as to wash away the liquid load compound before any appreciable absorption could occur. In view of the danger associated with delay, one would strip off his clothing at once and clean up with or without assistance* as circumstances indicated, ' .' ' m- mLsxiowm mtommM t.m rausne The lead concentration in a stream used for general purpose# and flowing through agricultural or urban districts should not fee pe.smitted to exceed 0 ,1 mgm, per liter-of water* . . . Even at this concentration it is'assumed:that the lead exists mainly m suspended material and. not in. solution, so that filtra tion or settling would result la considerably lower values. The permlcc&bld lead content of the *flashes* referred to in the report will depend upon the degree of isolation of these flashes and the use to which the water Kfionoioo fee put, Moreover the extent to which the lead will precipitate out as sulphide will depend* .obviously* on the acidity of the reaofcica mixture. It weald appear that ease mease might be developed for producing approximately optima! conditions for this precipitation, thereby the clear supernatant water might be made substantially lead . free, . . VSigned} RoSort A. Kehoe, M.B* director, Kettering laboratory of applied Physiology College of Medicine -Cincinnati* Ohio ooiom