Document 2qxzDORg4xnoRJOr0azr9aYJR

March 9,193U Mr. John Schaefer Ethyl Gasoline Corporation P.0. Box 688 Pennsgrove, N.J* Dear Johns I am enclosing herewith copy of our analytical findings on tank car sludges and scale together with two copies of reports made by George Calingaerfc to Dr. Kehoe. You will note the presence of significant amounts of inorganic lead In most samples. These may give rise to a dust hazard in cleaning. More important is the finding of large amounts of organic lead in two tank car residues, in one case over 30$ These are exceptional findings, and were attributed to previous blending by buckets or other similar means directly into the car as these ears have been traced to a refinery where this practice was at one time persued* Hormally there should be no organic lead hazard, but It is conceivable that there may be sporadic cases of the type which we found. We have on hand some thirty or more samples that have not yet been subjected to analysis. When these have been completed, we will advise you of the results. We would appreciate your getting us in, formation on the cleaning procedures practiced by The General American Tank Gar Company* Very truly yours, WPMslS Willarcl 5*. Machle, M.D. H e 0000749 T o 5 2. B. McConnell Prom: H P. West aop y Marcii 6 , 1934 Safety Precautions Unloading Tank Cars Heferring to th letter from Mr, Schaefer of the Bthyl Corporation re garding safety procedures to be used when flushing and pumping out gasoline tank ears* would advise as follows: It is the general practice to ground together the entire set-up, that is, the car and the suction pipe are grounded together at the fill cap, aid both rails and the suction pipe are grounded together at the base of the loading rack. Connection Is then made at this point to the ground which can be a water pip system or, if this is not available, a 1-1/2" galvanized iron pipe approximately 8 feet long, or long enough to reach moist ground, can he used. All connections are made with #2 A.W.G. stranded copper wire* Wherever clamp a are used care should be taken to"see that the surface of the pipe or object is thoroughly cleaned to shiny metal before installing the clamp. Mention should also be made that wherever there are swivel joints or numerous connections, a by-pass should be made with wire around these joints to guarantee a positive connection. In the particular case Mr. Schaefer refers to, that is, the Ethyl Company5s set-up for vacuum removal of the gasoline, I would suggest that the above procedure be followed and, in addition, the receiver tank also be connected in the grounded system. HWFset H 0000750