Document L94mpgVea1OJn80wx0x1nrwz

January 1?# 1940 Or* vr F. d<5 Prieatsr fan&Jong 'Prick Batavia Dear $ctor da Priesterj~ 2 have received com correspondence the Associated Sthyl Company Limited which Indicates that there hm boon noss discussion about certain lead analyses which you requested in, the ease of workmen engaged in the mlslng of 3thyl Fluid with gasoline* It occurs to in that it my be wise to refer to our own practice in this regard in commenting upon the necessity for these analyses, w have been supervising the activities of several thousand men who arc engaged in this work in the United States, and we believe- from a practical point of view th clinical examination of these men is an adequate means of maintalcing hygienic control* On the other hand from tine to tine over a period of years, we have selected a group of these pica and have studied their urinary and fecid lead excretion with the idea of determining whether they were absorbing abnormal amounts of lead* 2'believe 2 have sent you reports of the- results of these and other oxsainat ions which demonstrate quite clearly that the occupational exposure of thee mm la negligible. As a result of thee studies we are quite sure that if the equipment is kept in. order, and if the. mn carry out their work in accordance with the regulations, there will b no lead exposure or load poisoning, and there' will be no abnormal results in the analyses of excreta. 2 do not wish to discourage you on this account fra making any tests which you feel are necessary to inform yourself properly aa to the occu pational load exposure of mn under your supervision* Consequently 1 feel it will b entirely proper for you to' have these analyses and once a year if you wish and pass the coat of thee# on as you did before. Uy only query in the matter has to do with the accuracy of the analyse which are carried out* 2 should be very much He 00133/4 7i m $ . **. Inttresteft III knowing %ifmt to toon the *tp4t*inae f . Vmm who -4# the mrnlfm far ima* a& vtist equipment is ' swaiiebi* %& the* im- the p*rp##e# end wtot wttea of eM&yttl* the* eeptaar* I raise thl quests Isa beeeoee there is a sere difficult clinical tost tton that of making analyee* ?af lead on the e&ortsto* It 1 totter, of eaurse, not to ssafse Ito analyse# at all* t?ais they eon to aa&e tf oettode which are m preoloe that they will not yield aialeading eanite Our experience in this country shown us that tm laboratories and few choralta are pvwpesljr to carry aat these analyses, and that, isoreo*#** wry tm of oar colleagues realist the ears which la necessary in order to collect samples that will not to dsatan tasted with lead In too process of collection, I should wish, tatteredm*' to to quit certain that ym hav tbs means of obtaining precis results tofore Hiring say blanket approval to these analyses* tfith these ideas in mind, X should appreciate it vary much if you would tell iso what precautions we4-a taken in the collection of the haiiplsa# and how the -analyses were made. Cordially yours* -a K 11 cc Mr, Fossett cc Mr, Tully ' fotoef tl'U, K 0013375