Belte r r a Cor p or at ion S afety M an ual D oc I D C H S M BE L 2 0 1 7 Pa g e 2 32 of 53 8 C ontrol of pr oc e ss condit ions C ontrol of pr oc e ss m odif ica ti ons e g subst it uti on of a less ha z a rdous ma te r ial 72 S a mpl ing a nd Ana l y sis 73 Dire c t R e a din g I nstrum e nt 74 C olorim e tric De tec tor Tu be s 75 Admini stra ti ve C ontrols All emplo y e e s that m a y potentiall y be e x pose d to H y d ro g e n S ulfide must be provide d with prope r tr a i ning a nd e duc a ti on I f e n g ine e rin g c ontrols a nd wor k pra c ti c e s a re not e ff e c ti ve in contr oll ing e x posure to t his m a ter ial suit a ble pe rsona l prote c ti ve e quipm e nt i nc ludi ng a pprov e d re spir a tor y prote c ti on will be prov ided to re spe c ti ve e mpl o y e e s a s following Doc u m e n t Identif icat ion S E L 032 P age Nu m b e r 5 of 6 Doc u m e n t C r e ation Dat e Ma y 12 2015 Im p le m e n tat ion Dat e J une 30 2015 R e spira tor y P rote c ti on N I OSH R ECOMMEND AT I ON S F OR HY DRO GE N SU L F I D E CONCE NT R AT I ON S I N A I R U P TO 100 ppm o P owe re d a ir purif y in g r e spira tor w it h c a rtr id ge s to protec t a g a inst h y dro ge n sul fide or g a s mask with ca nist e r to pr otec t a g a inst h y dro ge n sul fide or o S AR Suppl ied A ir Respira tor or o full fa c e pie c e S C B A S e lf Cont a ined Bre a thi n g Appa ra tus EMERGEN C Y O R P L A NN ED EN TRY I N TO U NK NO W N CON C EN TRAT I ON S OR I D L H C ON D I T I O NS P osit ive pr e ssure full fa c e piec e S C B A or posi ti ve pre ssur e full f a c e pie c e S AR wit h a n a ux il iar y posi ti ve pre ssure S C B A ES C APE Ga s mask with ca nist e r to pr ote c t a g a ins t h y dr o g e n sul fide or e sc a pe t y pe S C B A E y e P rot e c ti on N I OSH a pprov e d c he mi c a l saf e t y g o gg les A fa c e shield m a y a lso b e ne c e s sa r y if the r e is po tential for c onta c t wit h li quid h y droge n sul fide S kin P rote c ti on N I OSH a pprov e d c he mi c a l protec ti ve g loves boo t s a ndor othe r c h e mi c a l prote c ti ve c lot hin g must be wor n if the re is po ten ti a l for c ontac t wit h the li quid A c he mi c a l prot e c ti ve ful l bod y e n c a psul a ti n g sui t and r e spira to r y prote c ti o n ma y a lso be r e quir e d o n some sit e s A show e r e y e wa sh st a t ion m ust be re a dil y a va il a ble in the imm e diate wo rk a re a