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; O P V BHIfBD STA2ES EEPARTMU H2? OF AGRICULTURE BUREAU 0F BIOLOGICAL SURVEY Washington, p. C« y o r i July 21, 1922. Mr. W> H. Coras to oik, Genl. Mgr., union pacific system, 523 pacific Electric Bldg., Los Angeles, Calif. Bear sir- / / I wish to again refer to your letter of Mroh. 2 to the Bureau in which you advised that the executives of the Union Pacif io system had * granted an appropriation of about $1800 to cover fcfetallation of an o il-recovery plant at Las ?egas, Rev., and our replyjra March 10 thereto. Ihe Bureau was greatly gratified t l learn o f tin action that had been taken by the executives and is particularly interested at this time to learn the nature of the measures tam n to prevent a il and o il waste from accumulating at the roundhouse sump, am we have received numerous inquiries as to proper methods to be pursued to handle similar situations. I f you have a diagram or blue print of\an# construction work on this pro­ject, we should be greatly obliged i f you could furnish us with a copy of it together with a statement showing the actual cost. We shall be very glad to have detailed information from you concerning this matter, including the results o f the plan that you have put into operation. „ , Again assuring you of the Bureau’ s appreciation of your interest in this matter, I am Very truly yours, (Signed) w C Henderson Acting Chief of Bureau.