Document 3Jobm8BKqBaZKVwJx8VDeKkY0

bcc: N. I. Johnson - MJOHN Novsnbsr 8, 1967 Mr. C. 0. 01--n R.D. 02, 90X329 ,, Llgonlor, Pennsylvania I5658 " ...... ' Door Mr. Olssn1 Tha question you props-- 1 ns--ly, that of welding --tsrlsl that has on aooiswulatlon of Aroolor on it, cannot bo aaa--rod "yes" or no* without --ro quantitative details. . first of all. X think It la a aattsr of pood housoksopli* t--t any --torlal ha sloanod off aurfaoos to bo --ldod. As you know, osrbon aonoxldo and othor bydrooarbona oaa 00-- off of --torlal that la 0--tod with plain --tor oil. Xn tho saso or A--ole--, ohlorl-- gas would not bo 11boratod but hydrochloric --Id vapor oould oeour. this, howovor, would bo notle--ble tar tho for--tlon of a whits aloud whloh would bo irritating to t-- oyos aad no-- and X think In this on-- --ro sufflolont WC1 gas OTOlrsd you would, for ths aaks of s--fort, roqulro control of tho --ldlng turna. Again. If Aroolor vapor was ovolvod in auTflolont quantity to csu-- aystoulo da--go. It la ay opinion that tho-- would bo auoh a notls--bla aad dlaag--Mo odor that you would not oontlnuo --ldlng. Again. -- a-- doallng with --ttsrs of quantity. X don't know if you work B hours a day doing this aa-- typo of work or wtoothor you --Id 000 or two tanka on-- a --nth. without knowing what your a--ot situation la. X oan only advise you that If altar --ldlng a biting odor or irritating 1--os a-- p--valiant. It w--Id bo advisable to ha-- an exhaust ar--nga--nt to ovao--to t-- f--. Sin--ly. Kfl^ln A. I--Ot Kslly, N. D, Nsdloal U--etor MONS 008368