Document 4JBN0oMJa8gGaZ3rmBBYGeanp

July 16, 1970 Mr. Fred Murdock Project Engineer Itlwanda Steel Ccopany P. 0* Drawer Ho. 8 Stlwenda# California 91739 Dear Hr. Murdockt Z have been asked to express an opinion aa to the oowparlaon of hasards to workmen should a hydrawllo line eontalnlns our Pydraul 318 or a phosphate ester based fluid rupture and spray the fluid at a temperature of 180ep on personnel, Secondly, to oonpare the hasard if eoifth2eorooflur. id than sprays on a hot Ingot at a teraerature About 15 years ago we sponsored toxicity studies at a world renowned toxloology laboratory (the Kettering Laboratories, University of Cincinnati Hedleal Sehool) in which a Pydraul fluid# a phosphate base fluid and a petrolewa baae fluid were sprayed on ratal surfaoes heated to 800*7 and 1050P. The decomposition prodaota of the fluids were then oonduo ted into suitable chambers where a variety of expertrantal anlrala were housed* The ooraentratlon of deoeepoeltion prodaota in the ease of Pydraul and phosphate base fluids were sues thst the anirals were obscured In a "cloud" of particulate ratter (cartel) and vapors. The oone lesions of the toxloologlats conducting the expert rants were thst tbs breakdown or deeoapealtlon produots of the fluids were eonparable. In other words the OSW 018848 STLCOPCB4005392 Mr. Prod Murdock July 16, 1970 Pag Two decomposition produota of ttM Pydraul were no nor irasodiately toxic than thoa of tha phosphate baa fluid or petroletaa baa fluid. In tha oaaa of tha patroleun baa fluid, tha experimental equlpmnt had to b aodlflod ao that th anlnals wre not xpoad to tha flan and Lntana boat aaaooiatad with tha ccaplata burning of tha fluid. In tha few instances whloh have bsn reported to a whero rippraullo fluid Unas haw ruptured and sprayed Pydraul fluid on personnel or aolden natal, workmen haw bean abl to reteain in tha area (without injury) for periods long enough to shut down the equipment and than leave tha area. If I oan be of any further help, plaaaa lat aw knew. Sincerely, 8. Basel Sally, H. S. Medio 1 MreeW RBKtJu o.e. Jaroaa Davidson^ Angelas b.o. R. A. Garcia, Akron 2>. A. Ball OSW 018849 ; STLCOPCB4005393