Document mpo3j3Ze8LK4YgbDaQE6mBRGB

Barry Castleman's DuPont File CD-ROM Document # DP (j ^ DATE Type of Document - published report from journal - published report from conference - published abstract from conference - unpublished report - unpublished presentation - meeting agenda minutes report - memo - government report - industry warning information - book excerpt - legal deposition of________ - notes of BC on W. gH^^CNSON. I05fi WARD ?TCPmNSOM maaun Thompson c-7 'c-._ c-L STEPIIEXSOX and THOMPSOX ^ STEPHENSON BUIUOtNC / 712 DIVISION STREET ORANGE,TEXAS 77630/683*8396 \ December 16, 1970 AIRMAIL Dr. John A. Zapp, Jr. E.Z. DuPont deNemours & Company Haskell Laboratories Wilmington, Delaware 19898 Dear Dr. Zapp: Your name was given to us over the telephone this morning by Dr. Shield with the American Conference of Industrial Hygienists in Cincinnati. Dr. Shield stated that you were a member of a committee referred to as Z-34 Industrial Hygiene Committee and that you may be able to assist us. We desire to obtain as soon as possible a ,y information or literature concerning the standard or threshold limit values on the inhalation of asbestos , dust set by your committee at any time from the years 1940 (or prior thereto) up to about the year 1950. We understand that in about the year 1950, the responsibility for the setting of these threshold limits was shifted to the ACIH. . We will be pleased to pay you for any research or to pay anyone you mightxrequest to do this for us, as well as for copies of any publications or threshold limit values recommended by this Committee during the. years mentioned. . A If you will be so kind, we will appreciate it if you will let us hear from you as soon as possible. Yours truly. WS: jb Ward Stephenson n\\ _rr'~1-- !I Lr-.' 0C 1 B *970 H/iSaELL u a