r 196 4 ,* DATE ENTRY No.

N11068 pNtcooOOtoa'.

EXHIBIT WO.

faEPROCTUCEO AT THE NATIONAL ARCHrvES^ j^fvj FRANCE . i-;V ' -- 'Trade Name: 'Category* ' Colors - ;Iftinber; " "Quality* , Ful-Gloas Finish Interior Gloss Paint White 1030 First ' ..

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< o C-> tri C.J ce N 7778 REGULATIONS FOR CLEANING STORAGE TANKS WHICH HAVE CONTAINED ETHYL GASOLINE These Regulation s are to be regarded as the minimum requirements for the avoidance of lead exposure in cleaning tan ks th at h ave been used for storing gasolin e containing ETH YL Fluid.

JO H N A LT O N JO H N ST O N , M.

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Jan u ar y 3 * 194 Mr.

July 9$ tm B1S1ra*0v7aJnoBnhaunhl*lEG*stefroreraegitia Dear Doctor traint umhtestscsohhhaaelorfiuomeniavnlnwddlbtepsi*eelnHgirlotedarhofaIttaeldrhehsmlro*hmtaaatmoshasbttowanilnnnfeyttpeathohdkdhoelyserqiurs*0Itsiurhnlrt*iais0eopptnr3lIaeaemtus5attiraritita*deemyqilnnntuhieiIcottlinelWotfied1hwsngaiailrttivmeshesajaihunmpddnttslhusetotvoewiaitsfssplihsieraetao*ehwbrwbprsiene1oleoenf0dsrrhb0utthewet0lodetg*tiosb0rttahha1lepmoanyoaaianonosnystsddut Very truly yours* K&Ksis RoBerfc.iWKehloe* M*D*

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// On the Effects of Exposure to the Dust of Eagle-Picher Insulating ' Material by i Robert A.

000830o

Ma y 1 ^ , 19l g .

Professor Dr* G, Herman Sieveking Rothenbaumchausaee Hr* 211 Hamburg 13 Germany Dear Doctor Sievokingj It was a pleasure to hear from you some time ago and I have been somewhat tardy in replying by reason of the press of many things de manding my attention* I seem to be in a rush even when I am traveling outside this country* and X am sorry that I have never had the opportunity to talk with you about the many aspects of our mutual problems* I am very much interested in the work which you mentioned on methods of determining the lead content of urine* and I should be very glad to hear of your results* vie shall maintain as close contact as we can with Dr* Helntzman in Leuna who 13 also woiicing on lead methods* We shall both check back and forth on cergain samples so as to determine the comparability of our methods* I believe you will find that some modification of the Fischer Leopoldl Hdithis one" method will be found to be most suitable for the analysis of urine* unless one has spectrograph 1c equipment available* With the dithizone method one may use small samples of urine and obtain quite accurate results* I do not know how much experience you have had with the various methods* but I think it is perhaps worth while to caution you against the use of methods which have not been very carefully checked against small known quantities of lead* X say this only because quite a large number of mispleading results heve been published from laboratories in this country in which not too critically tested methods hay been employed* Moreover the diagnostic interpretation which has been put on many of the results has often been unjustified* I think you will find a fairly adequate discussion of most of our problems in relation to tetraethyl lead and leaded gasolines in the book which I have sent you* I find that the moat frequent cause of misunderstanding is in relation to the handling of gasoline* After fairly large experience and rather critical observa tions# we have come to the conclusion that there are no HE 0013525 which the gasoline has been stored for considerable periods of tine.