Document Lp5Z1aggegMOyEBK4LB2OxY45

ESSO RESEARCH AND ENGINEERING COMPANY_______ MEDICAL RESEARCH DIVISION P. O. BO X 45, LINDEN, N, ). January 3 , 1963 Dr. R. A. Kehoe Kettering Laboratory University of Cincinnati, College of Medicine Eden Avenue Cincinnati 19, Ohio Dear Dr. Kehoe: We are trying to obtain some information on normal levels of lead in rabbit blood, urine, liver, kidney, brain and bone. If you have had a chance to develop any data along these lines, and could make them available to us, we would certainly appreciate it. Also, we would be very much interested in your thoughts on what constitutes a reasonable eight-hour maximum allowable concentration of TEL in air. Very truly yours, R. E. ECKARDT, M. D., Director EGB:WK