Document M47XjydwMZ2j4gooGZm963Oqy

October 1, 194-9 Mr. George Calingaert Ethyl Corporation Research Laboratories 1600 Eight Mile Road ^erndale 20 Ectro i .^u 9 ch --* f? t- an Subject Exh aust Gas Hazards Dear C al: 7!V* m atter of no now underh ood ven tilation of sever p. 1 0 f th e new cars has already come to my attenti O a 9 and I am ay; ar p of the probl era that pre sents itself in he avy traf f t c T -L. ih not certa in ths t this w as a smart move o^ the rare 0 0 anuf ac tarers, r or in accompli shine one purpos e. it has n O, gni fi ed a danger that is 3ignifi cant. Obviously 9 these vent i l ati nsr 0-*1 ye t C`4^ n n [ 1 Id be closed 0 ff when dangerorLS conditions exist, but I have no confidence in the avoidance of the hazard bv this means. As to the danger of lead poisoning under these conditions, you can, I believe, dismiss the Idea entirely. In the first place, the eroosuro 3s. likely to be brief, and it will always be intermittent. Our information on garage mechanics, who are often exposed to worse conditions over long periods of tine, is quite conclusive in its evidence as to the hygienically insignificant character of this type of exposure. Respite the rums: above am 1U"0 will be interested in knowing that we are at last in a position to initiate the further study of this problem under controlled laboratory conditions of human exposure. It will be quite some time before we have any information, but thi3 question wa3 bound to come up repeatedly, and, in my opinion, it is necessary to have an unequivocal answer to it. Sincerelv yours. RA-':hp cc: Mr. J.D. Macauley fob art A. felloe, ':.T>.