Document xza1njyoRN7N3n4VBooeK5aDm

ea ' v" *' : Mostsaoto Chemical Company St. Loots 4, Missockx July 25, 1956 e Mr E. W. Spileher Administrator Industrial Hygiene ` Westinghouse Electric Corporation East Pittsburgh, Pennsylvania Dear Mr Speicher: . # Ciank you for your letter of July 19 requesting toxicity infor mation on several of our Aroclors and atmospheric sampling methods I am sending under separate cover two detailed reports published ` by personnel at the Kettering Laboratories entitled, "The Toxicity of the Vapors of Aroclors 1242 and 1254." The data contained herein were condensed and presented by Dr. Treon at the A2EA meeting in Philadelphia this year. It was published in the form presented in the June, 1956 issue of the "AXHA Quarterly," a copy of which I am sure you must have. I am asking Dr. Treon, .by a copy of this letter, to send you a reprint of his publication if such is available at the present time. You will note that Dr. Treon has proposed that the hygienic stan dard for Aroclor 1242 be tentatively established at 2 milligrams per cubic meter and that the standard for 1254 be estSSliSEHTmt rmilTigrajirper cubic meter-. I am sorry that we do not have similar data on Aroclor I2t>u. However, we have no particular reason to expect that a c> per cent chlorinated biphenyl offers any greater hazard than a 54 per cent chlorinated biphenyl. ` * You will note further that Dr. Treon's work discusses a modified Willson hydrocarbon apparatus used in the' sampling of his test atmospheres. In a limited amount of sampling in our own plants we have used the Willson equipment as shipped to us. I have en closed a description of the operating procedure prepared by one of our research groups which is somewhat more detailed than that provided with the Instrument. You have previously seen our complete reports on the decomposition of Pvdraul when allowed to drip or flow onto a heated metal Inconel surface 7 The data in those reports have convinced us that there is no greater acute hazard should Pydraul accidentally contact metals at the temperatures investigated than there would be with other industrial hydraulic fluids. I do not have any* data to support any conclusions as to what might occur If the Pydraul were to be used PLAINTIFF'S EXHIBIT /30\ 906235 GBRN003396 WATER PCB-00049783  Mr. H. V. Speicher, Administrator -- Page 2 -- July 25# 1956 as a hydraulic fluid in making namealiiBLdl.e_nafltin.ga> Me .do have a report that one plaar^HSI^TArge^^antltles of molten magnesium purposely sprayed Pydraul into .the molten material primarily to see if there would be a great deal of . . ' apatter.ing of the magnesium. She eompany reported to us that ' their teats convinced "them that Pydraul could be used. Whether < or not they are using* Pydraul# 1 cannot aay. ;i 1 not* n rereading your letter that I have not answered your '' *. ^. question relative to ildn effects following Arodor contact. ' A.We reeoamend that repeated and prolonged akin contact with anr TToi tne Arociors oe avoided, we have patch tested several of them With1 be&atlVi Results. Xn addition# reported cases of . I skin irritation have been surprisingly few In view of the heavy /tonnage quantities of Arcelor manufactured and handled in the % . I last twenty years. ' -We believe# however# that care In handling' I and good personal hygiene is necessary to avoid irritation. As with many chlorinated hydrocarbons# exposure to' sufficient quantities over a long enough period of time could conceivably result in^chloracne.* In this respect# however# the Arociors are notLthg~*poEen^chloracenegena. such as chlorinated naphtha lenes^. To our knowledge# there have never beefi Ahy cases 61' chloracne in the electrical industry's use of these products. If I can be of any further assistance# please let me know. t. Very truly yours. EFW:SM3 Enclosure . cc Dr. Joseph F. Treon * The Kettering Laboratory Mr. Paul G. Benignus Monsanto . P. Wheeler Assistant Director Medical Department r . .` . . 906236 GBRN003397 WATER PCB-00049784