Document 6byj1M4pb8DE9jyzvjapX8pV4

June 18, 193U Dr* Bradford C Scuddor Modleal Director Tha Grassell! Chemical Company Cleveland, Ohio Dear'll* Seudderj X am sanding you here!fch three copies of the analyses which have been completed up fee the present time, mid you nil! note that only a few remit* to be done so that lb is possible at present bo give a brief analysts of the siboatton* Let is call your attention to the fact that v q have not yet received the pads frets the respirators, and feliat the results on these will he of considerable importance since they will show the exposure frost a some what different angle* We should have the results on these before our data are complete and entirely satisfactory* By way of preliminary orientation, let a point out that the normal figures for lead Ij &v a man figure of about (*2) mgs* per sample of faeces, bub that the normal figure sometime goes as high as (*} mgs* I think we are safe in arbitrarily setting the level of normality her at such a figure that any amount above <*5) sign* may b regarded as a significant and definite lead exposure* The urines of normal individuals rarely run In excess of {#0o) Any figure of (*10) or over is, therefore, definitely above the normal range* tm to arsenic, the con centrations In normal individuals, in our experience, rarely exceed (*0&)siga so that If we set (*1) as the proper level of normal, we shall have a fairly satisfactory criterion* It Is Quite apparent from the results that there Is a significant exposure to lead in fch Insecticide plant and in the 2ino Oxide plant* Judging from the observations which I made in both'of these plants, the use of respiretore has materially reduced the hasards* I am somewhat surprised to find that respirators are as effective as the figures indicate* Despite the respirators, however* It Is apparent from fch fa .cal figures that a fair proportion of the men ar expound to eonsiderabX amounts of lead* It la also apparent from the distribution of high findings in the urine that a number of the men have been aboorbing lead in significant amounts .'as. a conaetiuenc of their exposure* I would confidently 5 your part is this direction* Lot me again any that 1 believe analyses on the dust pads sill yield wry valuable information* It la possible that there may be a correlation between the high findings on the masks and the high findings in the excretion of the men* . X have turned over to Dr* Machia the com pletion of the report of this work* and when it has been completed he will send in a Mil for the work. When 1 return X should bo glad to go over the whole set of results with you if you wish It In order to add anyfeining to the usefulness of the report which can be added* However* X have every confidence that hr* M&ofele will be able fco Interpret the findings as adequately as X can* Mfeh kindest personal regards * Cordially yours* HIaK % I a TtofTerV 'A* naliGe*Hin3* Hofeet Ho cop?as of this letter or of the report have "***'*' been given out elsewhere* H GO I 33d(> s'"*'