Document x17zRLnnkODJk72yj1bomoa41

D EPART M EN T OF H EALT H , ED U CAT I O N , AND W ELFARE PU BL I C H EA L T H SERV I CE . W A SH I N GT O N 25, D. C. B U R E A U O F ST A T E SERV I CES Refer to : 1 v . 1380 Dr. Robert A. Kehoe The Kettering Laboratory University of Cincinnati College of Medicine - Eden Avenue Cincinnati 19, Ohio Dear Dr. Kehoe: The questions raised in your communication of March 3 relativeV to tetramethyl lead (TML) have been referred to representatives of the Air Pollution Engineering, Air Pollution Medical and Occupational Health Programs. Although the Public Health Service has no legal a-uthority to prescribe the concentration of lead in gasoline, our staff has made technical review of the suggestions included in your letter and advises that they appear to be reasonable under the present circumstances, and consistent with our previous discussions, specifi cally as follows: 1. The maximum concentration of TML in gasoline be limited at this time to 2.06 ml per American gallon. This is equivalent in lead content to gasolines containing 3 ml of TEL per gallon. 2. Hie present warning sign on pumps and other containers be changed to read "lead alkyl" rather than "lead tetraethyl." Other wise the sign would be identical to that in present use. A sign with this terminology could then be used on gasoline pumps or con tainers containing either TEL or TML. 3. In the case of gasolines containing a mixture of TEL and TML, the maximum concentration of lead not be in excess of the equivalent of 4 ml TEL/gal and that the TML fraction be no greater than the lead equivalent of 2.06 ml of TML. Sincerely yours, . /' -C ' ' ' V if. / U . I d . ( ' ' ^ c*c O-C A ssi st a n t Surgeon Gen er al C h i e f , Bureau o f St a t e Se r v i ce s K0 0009264