Document gbdQ2QjE7OJ7ve7b6GXYGdGgQ

fMthU,: r.k.K+Y.tT.M~- r i sSSOm. ' li.U ftrC- , , AM **A lh Iw'farf, ijavan iMicin Drlop Chofcnt lD-gUnt 6tlna iroclor. lesions of ehloracne developed la seven workers employed in an organic aeid naaufsecuring pUat Aroelor was ustd ti a but excaania notarial around a Iir|i jacketed reaction ehaaber. Tor tamo souths, tbe eoapaay bad used nolton salt bet changed to tba chlorinated diphenyl baeaaaa of danger of solidification, aa well aa the eorroaloa problem. A alight leakage of vapors. particularly around tho eover of a aunp puap and froa all gasketed connections lo tbe systen act a aooa obaerved. a field study tyr the Conneetieut 6tate Health Departnent ahoeed tbe air concentration of chlorinated dipbenyle to be 0.1 ag. per euble aeter la breathing aonea. Recoanended "Ti*1-- allowable concentration la 1.0* lo one oorked regularly at leakage points; aerertbeleaa, repeated attempts were aade to control the leakage, but eitbout ooaplete succors, this operation continued for 19 aontba with no manifestations of espoaure to eUoriaatod dlphsyls. Oaaof tbe workera tbandereloped aoute contact deraatltia; on exaaination, qriti and coaedonea on both ehooka and the forehead were noted. Chloraene waa dlagnoaed. Examination of others in the awe area uncovered alx additional eaaoo. _ following recognition of tbeae eaaea, ell but on of the geaketod Joints in the heat exebenge aratan, including the eorer of tbe suap. were welded together, a band bole *as left with a gasketed cover ao tba aystaa co.ld be drained or filled* Since then no vapors have bean visible, end tbe odour or ehlorlnatpd di^oqpla la barely detectable in thelanadiate vieinlty of ibe anp. Continued observation of eoruTin tbe vicinity haslfcvealod-ho new eesee of chloraene. k t I in unuiaal feature of this out break of deraatltia was the loog period ef exposure before any eases were recognised, guddea reeog ltloh of {seven eaaea after 19 nontha waa a result of tbe espec ellyTeereful examination of tbe exposed employee* after diaeov irjr fit the first case. Of II exposed or potntlally Hfond, eev o leyeloped chloraene. v The fee air testa, even in tba praaencs of vapors, showed only legllglble amounts ef chlorinated hydrocarbons - indicates th t this type of internment tut flarly lent eontinued nl d cuesure is net innocuous. Tba low ooneantration of ths eblor natal diphenyl aigbt account for developaent ef lesion in only $0? of those involved. !. i HONS OS771* r TOWOLDMONOQ46043