Document 1QE0YBqz8Vp6xa3V9eVxo5DyZ

O K - 6T-S4 E- I. d u Po n t d e N e mo u r s 51 C o mp a n y INCORPORATED W il m in g t o n 98, De l a w a r e ORGANIC CHEMICALS DEPARTMENT pe t r o l e u m c h e mic a l s d iv isio n December 10, I962 Dr. R. A. Kehoe . University of Cincinnati The Kettering Laboratory College of Medicine-Eden Avenue Cincinnati 19, Ohio Dear Bob: Thank you for your report on the potential hazard associated with the introduction of tetramethyllead which I was very glad to receive since it terminates a job well done on the West Coast and in your laboratory. I believe this report played an important role in having the Surgeon General acquiesce to the use of TMLand its derivatives at concentrations equivalent to k cc's of TEL on a metallic lead basis. ' Regarding additional copies, I would be very happy to have you send one each to Dr. Rankin, Dr. Gerlach and Don Fowler of the Lead Industries Association. Sincerely, JRS/pvh J. Ri Sabina, Manager Antiknocks &Planning 0003334