Document M8xO1rVZK9M4moONVQdD35Ya

April 11, 1939. Mr. D. J. Hoose, The Texas Company, 135 East 42nd St., New York City. Dear Sir: Our Safety Engineer, Mr. Cole, tells me he had a discussion with you yesterday regarding the gathering of sludge samples from refinery and terminal gasoline storage tanks. Our Medical Department informs us that in their opinion they have enough samples at the present time to cover the problem they are studying. Therefore, if your men in the field are continuing to gather these sludge samples, you may desire to notify them that they are no longer necessary as far as being useful to our research people is concerned. At one time a study was made of the deposits in gasoline tank cars and it was found there was very little significant lead accumulation. Cars under observation were frequently cleaned giving no opportunity for any amount of material to gather in the bottom of the cars. If, in your experience, you find certain cars are not cleaned frequently and consequently accumulate an appreciable amount of sludge, scale, or other material, I believe several such samples would be interesting, lie would be glad to have one of our safety engineers present at such tank car cleaning, if agreeable with you, and he could doubtless go over with your representative the general safety precautions being taken. Very truly yours. 0. B. Lewis. KF 0022302