Document evyaQegkObaXypY6j7XGV1z8E

i., t(-_ >v *'1 ,. ! ,1. J k ,t -- I j jfW ,,* -> /? ? - 4' u "if A E ri i v i Ga s o l i n e Co r p o r a t i o n Ma n u f a c t u r i n g a n o T ia k f ic De p a r t m e n t U H. S CH A E F E R , GENERAL MANAGER. PLEA SE A D D RESS REPLY T O :* C H R Y S L E R B U IL D fN G 4 0 5 LEX IN G TO N AVE.,NEW V O R K CITY April 16, 1940 Dr. R. A. Kehoe College of Medicine University of Ci.noignati Eden & Bethesda Avenues Cincinnati, Ohio Dear Dr. Kehoe: I quote below for your information an extract from our Baton Rouge technical staff* "AIR ANALYSIS OR THE STILL FLOORS It was mentioned in last week* s Comments Memorandum that the lead concentration in air leading to the intake fans of the buildings was three times (.0032 ppm Pb) the average of the preceeding two months. This week the average was .0020 ppm ?b or slightly less than twice the previous average (.0012). This is due to the gradual dissipation of the fumes from the TEL spillage in the blender." Additional information on this subject has been given us from the duPont weekly operating report, as follows: "air ;::a:,Y3I3 pi t :e still floors The lead contamination of the air inside and outside the still enclosures of each building is given below and compared with the lead contamination of the air entering the building through the intake fan. Inside the Outside the Enclosure Enclosure Intake Fan A 0.0023 0.0028 0.0022 3 0.0010 0.0010 Out of order C 0.0020 0.0023 0.0020 D 0.0010 0.0015 0.0017 A special study of the ventilating system is being made by Mr. Thompson of the Design Division preparatory to the installation of a new exhaust fan drive in "D" Building." 2-2 KZ 0003637