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5* I. Du Bent De Iferaours & Company Post Office Box 1671 Wilmington 99, Delaware April 30, 1962 Vice Admiral Burton B. Biggs Office, Ass*t. Secretary of Defense (I & L) Petroleum Logistics Policy Boom l-727, Pentagon Washington 25, D C. Attention: Mr* Herbert Blair Dear Admiral Biggs: We are enclosing copies of an expanded version of our report on "Engine Durability Studies in Laboratory Engines and Field. Tests with ^ ml TEL." The principal changes in this report, from the one circulated at our meeting on April 17, occur in our discussion of the effect of TEL con centration on gasoline storage stability* We have added the results obtaine with a third fuel to the tobies showing the effect of time on the formation of gum and sediment; and have extended these tables to show date obtained at 0 and 2 ml TEL per gallon as well as at 3 and 4 ml* We also have made same minor numerical corrections in the section discussing the males-up of-the fleet used in our field test of b ml TEL per gallon* Following our meeting on the seventeenth, Mr. Blair said that he would be willing tocirculate to the participants any additional in formation which we might wish to submit* We would appreciate it if he would now send out copies of our expanded report, suggesting that those holding copies of the original report discard them and replace with the later version* The cooperation of your office in handling this matter is much appreciated. It was a pleasure to meet you and to have the opportunity of partici pating in the discussion of lead alkyl usage in Federal specification gasolines. Very truly yours, /s/ K. F. Green Engineering Division Meeting Date: April 17, 1962 at 9 A. M. Place: Adm. B, B. Biggs' office Subject: Tetramethyllead and lead antiknocks use Agenda: Introduction of meeting Report on year's field study of the medical aspects of TML Summary report of application work done in connection with concentrations of lead antiknocks up to 4.23 gms Pb/ gallon Discussion and Conclusions Adm. 3. B. Biggs Dr. R. A. Kehoo* E. I. duPont Ethyl Corporation uz. Kehoe has suggested that his presentation and. possible discussions following should be completed in one hour. It is believed that the summary of application and durability work, including possible discussion, should require not more than one hour. In the event it is necessary, individual discussions may be arranged following the general meeting. * Director Kettering Laboratory Department of Preventive Medicine and Industrial Health College of Medicine University of Cincinnati N9589.01