Document yX3B6eMYoBa7NYBnkpyxadb6

KKIiZ Inland lUani act.irin^ Division Dayton, Ohio October 21.ana ho/c_ber 1, l.'li . xtf** L. i. Cas<i Li'\ `Sewn toots pertaining to tsbustos Just, live t*;U, pertaining to both asbestos sduet and lead, ana euzwiy observations w*rt aade in cooperation, vlth . " ( rcrr. 0. I, ioler, A. H. Fl-..er, E. Gorzaa, . J. Joyce, H. D, Cray, ,2u ftraber.' K, millpi, il. ii. Gordon, A. L. Connalr, II. V. ielly, J. Zldncrll, X. I. Joo- Ccbuuate, and Dr. R. D. Johnston. ri; " .* exposure* uodox* consideration are incidental to tine proauctlno ef braka ... ,-( Inlnga and dutch racing*, The brake livings ana extruded clutch facings eefrJ..' I la asbestos, rubber, ana otluxr ingredients but oo lead or lead coapouodi.. r<Th* ' >ven dutch facing* contain ilbento:, br:z >Lrv, rubber a.iu other ingredients, litharge or its reaction proouett. Tin finished material contain! lead eapounde corresponding to apjiroxiaately If' of load. ; < . aecliylone and Suggestions ... . '. . f i' ` " `fZ (a) The faeollne vapors in .the ceiseat aeparfuent appear to aarit furtbar.; -- 'attention (p. t). *.`>v ** r* * s. '* ** \ (b) Xt appaare desirable for the operator in the cexeat department to use; ` :'i." an epproved rospirator eaile empty!:* lluarge into the nlxtr, ond that ) .. . accumulations of dust should be rjvwj pcriuiiicoliy iroa Ute horisontal surface* In the vicinity by a vacum cioent-r (p. 3;,, (c) The aituation in Ute laooratory probably ic not serious hut eight merit . the precaution of using a revpiratur anc a vaerna cleaner (p. A). ' (d) Tho dust near tne unslndin* opera; Iw.i in t.iv cement house approacncs, - or aacecnle. the poivtlreible iL.ii >ctu t.a use oi* u respirator la - ^ suggested (Test #1). . ' (e) The lean concentration Touna :.vur ' to thickness i: unexpectedly !.!,>, . further observation (Tort #a). lacaUic crinuln* clutch i'aclh3 t..*e location ic recusaonoed for (f) The lead concentration near tne groovo clounla* operation uxteeued the ' permissible Unit, and the in. tailatlcn of un exhausted table grating ' is sugi-.s^teu. i .*> . . (g) Both tho -ait and the lea; \.i. 'Uup sa.'k;lnc,|tpritiw.. gre.tti;' exceed tlie pi.* ilsrible liaitJ, u.. 1.. .irtiw. or ventilation are neixir<i (Test #7). . (h) Babftitutlon of vaeuxu a frill preo.' table U . .:>i . tr jo; :or rr-.so.i:^ ueurls fron ,(i^ slitti.v. iltn m* **/ i i~. fact that tJ<c voi'jv- 'tr Jr-v l . ' Changes are j^znruu (T-ft j.j/. /. u .. *. ii. ;,11*. of the u.g ;/. 'dextv l.. a.u.',u*tc na^ EulL** rtf* tt Iniann dli.' UTVclca ryjrr- Tb co.iii.TJwd uz* f raifOra-or/ k^r ue -m :.*i|iia*, u incrauianLi it Uj* bract 11 "t'.j t'~["" 1 ui o* autlraiia, Tn* wt of TH^lrtiorr -jriiT* um erti.' porVoo r.w u* nicer If ii*ar*ad also U IflOUtbO (Tail oi". 't; i` b Lit*ratlin raiatloa lx oecupar. LonaJ UttMl cdUWJju -lisj tiltr*uw Is U oSoel* of JjshuliAi aijLjBflclw ikiiSU of utfitM. Putiii milUt &j] latifl /Sal, H of AsmaIo&I* it tta iib*iu* louuitryInuruatlDtul Labour riffj"t, to Gccupatijc *--J baaicti, uuj Jcr.nry Uii ud jtitlad Public baalli flxpcrli, ilnnJM.- El, -iii, "A iiUkfc' of Dull tooUtil U#U**i it dir fat* a tot Flaaf; and &*far i in Mti Eosricaa ` Journal of Public boaltb, Jircb Ul*> '`iatuttodi**, m/ 1* wUid pnuiuiUjr jjj t>,i. OTiteiiod. H^hurtt.U ImIj trial Jodie in*, Octouar ii?J, quote? berp jjd L*ooart Jj. flacjaalAl 90 till**, aicrilou w a*b**toci(, e^alul t flr lerm+tu iamifeelcris* wrote li-U^l ii. Jim.-nirtuc. Tfalr* puiliva '" 'fl1lt~ ~* *W* aaa*,l lib iaa+rmne* carrier amo^td erkIf<i laatioc or aattla/mT in heck of liC,OX far tU italfi. Thirty of iih j'cjaLe.lt* ctac.ty-aLfht eta la trial- 7s*r* appear* ix e* ooae aiffamca of opinlub r*im\*ic* til* rt 1 >fTfift, aj padally in hm of um rt-tiwiaiUuu, ei ua wain* a^ariac ppp-Hm, iui eua L*'ii or .us* f**rt -/tar tba cofiatiot. of Um icpcnaire. in If co*e it i.tuS* ttupLlcat*! elfcira, Ua'. --ay tx ijj* ii,fence* of .V ! iqpdcito raiuuUif "v fwmLailbl* Hull for c*b*iej tint- II appear* proper, to accept um fLuiun* of Sayaro a Draatao (iMricac Journal qj Public ' :ip*TTn_ Marcb 1913, p* 20^-i4], --tiicL ioJLdai* * pcruiaalbl* lUll of i,OX,OOC par cubic fool o*' air. Ttj' iUUi *jiixlU cji.nl tai ud roafilfaeo- jlifUr ovidatca of irb*toiU 1* otiarros it acpBuad parruu alltr f u id jraan 5ff MOtlt L cpc*uxa* txccwLc* 4 .liliict parVlcioe par cubic fool of air,* *od XJi aifaar* lAul, if anbcclo: duel ooneoaLraiiou is Um air UroaUMd art kapX OmIoo a.p.p.a.f.j aov cun a: jjdnjitoal* fli rwv appaox." furtlMr, It utf ; bo prudaot to siaraiaru aufaa*td diciioeuau buiuaac ion, fibraJ, abort fibrvCj uxl partid<ts too iert to b* ciuclfiaa a* ilurei. r-A-: , Mi " ' tEbottt Ua f-**?- v[d, Um Pibuic rttalUi c-jrvtc* uunuudod a*, invaiLifftiwi it a 'larp* atony* witMr/ piaut und uajiiouiiy bc^oitw l.E -uilWriLU. per il cubic rMUn af air ac Uir puracarLbfa it-iv :o. i*n. 1 rc-cuni. cnrJiqr, ltvoi'.i.nd ir t*sW Lc tt pftni'M ui I'm u4it-l njtacf.uifur. a! ipp-jif.aivly 700 aan, ft istarpraiai u ;?*.iru to* pro'.'iou cmciutiiK ca to .suit*;* that Um liut of 'l.i kf. it n^iini u> avoid Motri/ plujbinnr. liu>u.ilun tf V-o uatUr u . MUCfsaUd tool '`aarl/ pUafriu" uay tot ba vrp carfuii*. HcfvrUiaiaai, it 0?p*a frodMct for lab! Conta.ltrttiilii U L* aaiTtbliUo vaib* Uiat l !. 11 ig [tr u hEJIffparad to chiorijut*, aoi.ojiU aic coal-tar t^dfoca.bvta, Itt sppaari Uat CtMlita Taporc or# rolaflr*^/ non-toxic. Vlad Lt 'lf 301, Jb'-.wtr, vltbout pi^fir f-'u ' A Uu-IUm, is l.u/ji:/ oi -a I* ucJcjaatl-1 CiTjii'jo eii pG*4>*<-nxwl &CIVX, *i tut If/ ft r rv u. V'por prr uLillon parti air ia a proper "11 -It for pcocLisji; v-.t -1". f-.i- u-^uivijant to 3.1A k} p?bj*t Ttd , / / : i'.ijr.oio il lit ,f| t ,,,r,p .a ip^rt-U ulv l>i> tf,' 1r\ttrklm* Studies P,t Inland dff* Wriaioc, euluae' (bureau of mint'* bulletin #k7e) .. . Uu.'Uwt Uuti '4iu with a . . jtxploalMter hain ahoan concentrslsa; uxc* o* the Halt la ert*ia . locatluoa at cert-in tiuca la tie ts'.izi uspurw>ut. Ho further stated that con centrations approximating 231 of uv explosive -init art uulu cnoann. Tbe iu bline used ic acre volatile to the graue; ,,eacr.*Hy unployod for outoaobllt fuel. The non la tho non cooplalnod uben the ooora and windows were closed, to sluulats viator conditions, for about lb uinutes in Teat Si. Jr. Flo. er at*tod that the Bettor coulu be given further attention to locate the prlncipul sources of tho . vapors (there appear to be several) eaa to investigate the possibility of using a lose volatile solvent. ftiscellanew Itocg Eeverul additional situations were ot-tr/eu anc discussed. V. r^.. The air exhausted .'rou the finioning eperrtisne on broke liaiuigo aad clutch facings la paaaoa through cyclo;* separators uo the roof* la is ccunon with cyclones, such of the finer aatorial oacapea. At times the fine dust la blow back iato tt* factory via the windows in the monitor. Jesar*. Connslr aad pardon atated that the accumulation L the bin under the largor cyclone is re* bowed and hedged three times per aay, At time* the dust from the hmu*nl operation My eater the monitor windows. The accoautation in the bln has a tendency to catch fire and Holder* A fire hose is kept unreeled and in reed* lhess at. all times. Tho oaterlal does not tot rwauily, and it ia difficult to ^iiytinpulah the fires. Ur. Cncmnf r stated that the cyclones nay be replaced ky 4 fehnelbls or American Filter vet system*. Fresujiably the vendors of the equip-' P** will be duly warned of tho fact that t-e dust uoes oof wet very readily* is one of the ingredients in the couent uced in tne clutch facings llipi stated that three timo* each aiy a bQ0 bog is emptied into a olzar*. ui tus brevity anu infrequency of U operation, no test of the air was. }< bade. A aanple of duot from an angle iron supporting the stairway con Mined )un of lead. Tw v* .. Peartaia eaperlaental eouposltioor *r* I'Luisuvtl in tl.e xaooratoty. Tbs operation j^S infrequemt, and the alcove in unicr. It is conducted in isolated, during the PperatloA, froa the rcaniuder of the lnotrstory cy a curtain. Uo specimens were areliable for grinding on Uoveuoer 1st u;.i no teat of U* air cos utde. However, i. es^le of dust from the lamp shad* ctr.ui..od b.ti lead. *v"*r -v . itr* SchuaeU inquired about wood flour. He ctate* t..ct it is used in sone of thr expounds, that the bntones ere sLxaa frequently, and that the ae.t appear to inhale sane of the cust. Ie aro not .:oll Iniorue-. aooul the vffocu of inhaling ffOOd dust* loodeorking has been o major iuivistxy, oik. poue' tools nave been use. for.acqy years. It appears, ho-evor, t:_; tm*. -utter Imt not been investigated thoroughly* Or* Adelaide Koss Salta vlnuut trial .yg.cr.c, je.. Ycr* Department of Uhor, July ant August 1350) has ruccivvu i.o.- litorutur* bvurung on tiw subject, oqd notes 14 reference*. The rvle>. lr. .icutot t.u.t ioou wor<cers nave been shove the average In usceptlblilty to rrt.ic*-- tltf pneumonia, tuberculosis, and . P^haps other respirator iisooses. 7m tt.tnu oi t..*- ~uoa uust as a causative tftor is in>*losted not prr/en. `' C^r duct end loud suupues were coUucMd ..Uf.i of Urcenburu-hulth ' SVPf*Uisf. - forunl bVi alcohol ic*. tlKr or.hupping lifuiu in euc.. Ustonca* Ti JTEL 00003 Air tfcrdoM Studio Page ** Inland dff. Wvleios BOUfitS- MTI jb(U g'-nr.l\r\? to K* Tr-130** UOJCrlS'<J lA Public health Bulletin #tlT. Lead was mU-led cclorioetricaliy V '* procedure a-iployfag di^beegrlthiocarbsxo.ie. leather ' Both daye or# clear with temperatures vaxylng between approximately SO tad 4pproxiuaUly 5CftFV The windows la the monitors oi the ioctory nn pvt}? ef TEST ^Sda^u^Std (carrt/ctod fur intemip- Ceaont Depnrteaat. lC/D/59. ti3AS SO minutes) ... ' \ rfa **pi. m taken in the alaloaoy betaoen thu supports from -.bleb asbestos erd is nn--Too oord tboo pose: tnrougb tank* containing cement, then through drying towers tad eventually la a*uo into clutch racial*. Dot escapes ^jibly from the conic during the unwinding process. be ure ialormod that ton non work in tl*> rooa, vnicn iv quifj largo. Ono appeared to l*poad of his ties In tin) location saaplcu, and two otuers wore corking pm&f.\ : jjMrilnUlj prior to too tost too doors ana sum of the windows wre open* At ;* par suggestion, Jr. Gorman arranged to have then clotted in order to simulate * j yrtat^r coalitions* The fan in the cupola was running, and the louvers In the vers open, liter spout 1 minutes the mea *. the extruabag machine, end the pan oo the platfora obj.icted to tho gasoline vapor, nnu the time of the test was Shortened. . .t . i Bo cement tos compounded, on the platform over location sampled, during the j line covered ly tha tost. The tost Indicates 13,000,000 particles of dust per ruble foot of air. Even if allowance if node for the fact that the operator does not spend all of his tluw caoog the cords, ana perhaps tor the .act tout the wioaovs were closed (altuougb ttsx no doubt will be closea daring the cold weather), the concentration found approaches, or probably exceeds, the perdsclble Halt, Because of sis# and shape of the installation, the position of tho operator, and the uecosslty of accessibility, it aocs not appear expeoxea;. vj install vtuivxiating equipment. Perhaps the operator could be persuaded to uoe a respirator, a*, least part of the .tine* '' tb>: n. a^tos Ceaent Department. 1 j/i'jVi. i!:c6 to ,,:10 - The sstple was takm at the shoulder of one of tie- men blending brake lining fChaaploo xixers ore locator near tne westerly "all of the rooo (the sane that was involved in Test #1) and ur u;tu t: bleru the asbestos mixture ^1*3% #12) with psolise, rubbor. etc. 7~. xst.-stoi (ana other Izy ingre* U) is rocaivod Li Loxoc containing I'./M. 7/x-l: *_rc -lumped into the Cheapio* Sixer*. Gasoline (e relatively volatile gru-j-.) .j*l rui.bj/ an. addoa. The sixer is thee covered with a voodoo covor ono por.il'.tc.i to run until the blending has haao accoaplishsd. About 4 ulnutes it re .air'vl to thorge tvr, .tixers. The escape * SLXr Studies Page ti Inland Jig. Divide^' fc^duit,- when the boxes art duuped, is v#xy noticeable bus also unite brief \ Recuse the gasoline is added La-mdiatel/ cfterwara. There is s noticeable ' ' ' 4Hfjt of gasoline vapor both suriag end i oilwin* its audition. The covers do pci fit tight!/. Asee batches were mixed,anJ the floor was swept daring urn txue covered tgr the Sett. '-. Ooe of .tte too operators eore c. rwspirctor while uuepln* asbestos but not bile swooping. . . .. deort and some oi the windows were open auring the test. . j&a test jnilrrsMP 2,500,000 particles of dust per cubic foot of sir. . J.%..*' . TEST S. ASBESTOS . Chamfering end* of brake linings. Bldg. 11. Dept. 16. 10/50/59. 5i55 to 4*08 ,tr Jjjj* tt]` was taken st the shoulder of the operntor of the vertioel grinding heel need for the purpose. She wheel ie hooaed end coonected ve e fen. The Smte of. air-flow through the opening in the hood varied froe 400 to 500 feet per SHnatel The narnel rate of production is approximate!/ 640 pleeea per hour, and ilh* operator ypr^ about 4 out of 6 hours at this machine. .. test indicates 1,500,000 particle* of oust per cubic foot o: air. -. Tzsifv. isasm fini*4ong brake lining strips to thickness. Bids. U. Dent. 15. 10/51/58. vxOd to 4x22 eeeplf was taken at the shoulder of a girl operating the Mchlno which grinds bth sides of the brtwca lining stripe simultaneously* Thu machine is enclosed, and the housing is connected to n ventilating fen. Txiert. cu no noticeable frir-pr of dust. Ve understand that the rxachtnc i* in use about three hours in * - * A. M Wa ' Jb* slitter (Test #7) is located neart?. It vas la operation oai/ two minutes of the time covered ty the test, but me/ have contributed wouovhat tu the aunt count. Ibe.strips dollverel free the clltter to the grinuer nro eomeofcnt dust/* P" test indicates 5,000,000 particle* o: duet pc.- cubic foot oi sir* *' . ttST #5. ASBEST05 and LEAD Finlwhlng clutch facing rings to thiuoxoss. Bldg. 11. Dept. 16. ll/i/59. dt20 to 6x5 - 9x12 to 9x25 sample was taken st the shoulder of txto inspector working st the outlet (wester!/) end of the te chine fbert es e urift o1 approximate!/ 50 ;w*t per -Iron* :rou test to lost. ,^W-. fbd aachlne is sialltr to thu ono invoivi-d *j. Tew. #4, it ic tnclo*od,and the Rousing is connected to e venlllntlng fan. 7ir>r .* no vUlbio escape oi dust* $be machine 1 is use on!/ port of Uv. th*. TCI AAnA- v t Ifrficns Studies Pt| #6 lniaoa ilfg. ulrltloc ijour uyi ng 34.^ uoro turking in to- nisieuay exianaln.i aUat 20 foot asst 'hf.th% aachlno. ltf. -' ' * Jfce broke lining slitter and the grtnuer used lor the eogos of the dutch lacing* bare not In use during the tiue covereu ry tan test. 5%r* Thio ust inuicates 1,000,000 particles of uus; per cubic foot an- 0.9 -dUigroa* Of lead pr 10 cubic it;tars of air. Toil a-uxn:, o: *eaa, coutiaerej in conjunc tion with tl* direction of the draft, aug.^-ts met tue ventilation of U .tac^> lpo najr not be ooequnU. There is a possibility* n--ever, Chut it nay represent St dislodged Tron the surface of tne fac-ag* a* they ;tu* handled ty the laiMOTor. TEST 16. AShSbTfl? and ILAb Cleaning groove.- in dutch lacings. Blog. 11. Dept. 16. 11/1/ii d:5d to 9:01 (S&e was taken at tne anouluer of tne girJ .i*.u.iing ihc grooves In clutch Xaciags bar aeaus of a file, sno eas iocaieu ir. uie atslenay west of the grinder Involved in Test IS. The grinaer, however, coo not uoeu ourlng this test. The brake ijMaf slitter ana grinaer uer not r. .use. Tne arlil presses across the ' Alel* **re la operation. The operator of o;. of the ari.ll usee aa air jet jveriodicaliy ana aay have contributed to tuc ust ona ieia 1 o--..* in this test. Ye understand that tils Is a full tiae Job, throe s;u:t*. ' dfaft of approximately SO feet per uinat.; ua.- moving :ro- east to west. '' * ;The test Indicates e,d00,000 particles V* .-at pc-.* cutit foot of air and S.2 oilU< igrmos of lead per 10 cub.'.' -ettrs of air. Ids amount of uust approacho^ the `permissible Unit, and the lead exceeds uie por-ue*lble lluit. Perhaps the /Iling operation* cculd be perfurxwi over a cuall grating set in the top of the table. The grating oouid be connected to the exnnast fen via suitable duct work. h- * (. .- . IfiST l? aftu LLAJ "Flap sanding" Inside ana uutrine oi^u- oj cl*tcn facings. Blog. 11. dept. 1C. 1+/1/*0 jiZii to j.eO . . The saople eas taken at the shoulder of t;.c operator o. tne .achine located near ' the end of the alflouoy nentioneu in connection v.itn te: ts ft, #C, ana *8. jTdouble endeo polishing lathe lo eH-ippcu -it), vneols oauc by attaching strips Cf.mtry cloth to a aultable hub. The ton ':lap oandiAg" is an opt aescriptloo dfvthe operation and equipment. Tor lutnc ti cyuipptw with the custuxary Sheet serial hoods. Tito hood over the -iujui uaou : or the Inside to ,v* and been opened td perait access. The flaps act as centrifuge, tuic and overaiteln the intended *e#oG of the exhaust cucts. Tite opur-tor't ciut;^:^ i bloan tightly against 3&*-bo^ and legs. Toere is a vory noflw'.-abit -.ucape of duat. understand tfctt too naubU* U in ujc j**v. five ;*;. pr, shift. The test indicates JI0,ai>v,>j0 portlelec .t *.uat p*.r e.tie *uot anu 0.6 nililgraus w issd per 10 cubic .-voters oi air. Ihcou ciMicuttrati-ovs a^'O e.outly in excess of ho #7 Inland ^T|. Dirioioc ' .. V . . ' the permissible lisdts. Nrit*ps the edge: of u* lactams could be finished la om other uuvi Perhaps a vita akwuwI fo could be ucleMa Mn coapletaly and ventilated adequately. ' .. TEST *8. iSfeSTOS tr.d LEAi ' Drillin* clutch facinmc. Bldg. U. bept. 16. 11/1/5*. 10:24 to lo:64 Tl* sanple uj taken ut the shoulder o; the girl operating a drill pres* near the easterly and of the atslcway. A duct uminal is located about 6" from the drill end bu an inward flow of approximately 300 feet per nlnute. The genaral draft la the vicinity was about 60 t'uet per nlnuta east tc we-t. 'Se./. ' Ce uodaretaod that this la o full-tiae Job. la air jet la used periodically for removln* chips and att iru the table of the machine. It Bay be responsible for aueh of the coaTaelnation found. The test indicate* 7,000,000 particle* of dust per cubic foot sod 3.7 ailligreme of load per 10 cubic ueters oi air. Perhaps a vacuum cleaner could be eubetituted for the air jot. TEST 9. AfBEfTOS Slitting brake lining slat: .r.to strips. i i Bldg. U. Dept, r U/Vob. ll:uo to ;i:63. - Jba aaaple was taken at the left shoulder o: toe operator ol the aschine wulch lite the Slab# of brake lining aaterlal (20" a id") into strips (1"V4 x 13') This i* accomplished by a gang of tnin grinding encode aounted on a shaft. The machine ie enclosed and connected to an exhaust fan via too terminals. One terminal la located at the outlet of the machine and the other at the inlet, the inlet is a slot 1-1/2"* W. the terminal is located underneath ana produces mo iaevd flow of approxiwtely 1000 feet per ainute turougi: the slot ehen no ' glah is in place. The slab, however, interferes with the floe through the upper part of the slot, ana a very noticaable escape of u^st occurs each tine a slab engage* the wheels. Tvo suggestions may U offered: (e) In*t the uuct work be diviiu vnas purt ox toe ventilation is . taken from the upper part a: ir.t machine. (b) i soft rubber atrip be installed in U* upper part o: the riot so it fills Um. space abov the siat. During the test then tea a draft of approximately 60 Jut per minute from east to seat. fh* ti.ickr.ess gr.o.vr ~ac u. optn. d',i. , tribute luporu-v.ly vo *...' vustir.o:: v s*. Lut proauLiy <lio n.i con pLtr Bygiao studio* Pae 46 l.tlund Ufk'. Divlfcioo >1# art informed that onenine ^euf.v--ily ii unu atout 2 noux'u per sniit. S# ;further understand th:.t opuretorc -u iy xluo ran t)v- cLuuferin* muenin# (Imi #5) Ml tho JU <U0). 7 - p'-wuc** a.; averse oxpouure ojcvtut *n axcesa oi toe purJr3lt.e *init. lb* test inalcate* Sf.OOO, X>0 paruui-i ox uuut pr cuoit loot o: air. 5 vsy . I**'] ilSt__ SaTlne erase lir.in* rtrlp* to lant!u I'Bldj. 11. Sopt. 16. 11/VS8* 1.,4S to 1:S0, alnu* la .iautc- interruption. lh oaaple sail takon ul the aboulder o. tuu vparutor of ue machine, -hid'. 1* u a aav. Ho; ever* Uj* cutting tool actually 1* a thin obraalvo nhoel. Then rax no aeaoureblc druft in the vicinity at tee tiue ox' the test. -Tfv ib quipped with exnauat ducts rnltL terminals in the table uoar the < **: * * Jbt thldaxoaa grlnacr (Teat #4) wuu in umc uu nay h?7i cuutriUitod (wmcvbat to ^the oust found. Therv sac* horevtx, a vlolDlu cocupc ox duct ox K*okc froo the '.*ju+T Tl* *tripe, aa tney leave the tfrlnuur, uro uomeahat duuty. , .. . \* art infomod that the* wxchln* la ucta about 2 hours per chift. ' ' " ' * ' .* >, . ' * '*.. Tbe tdst Indicates ,000,000 particle* of aunt pir cubic /out of air. V . TEST #11. ASBESTOS ana LEAD Grinding outer odge:. o:` clutch facial diucc. Blag. 11. Dept. 1C. xl/l/dd. lx 0 to BrJO . ' .doe and of a double *:Ued stand is used :*ir u `mad the bousing i* e^umreted to un far*. f. . The machine is in uoe only part ox tic tl;e. Thj wj.eel la enclosed There tu l draft o: approximately SC t p>: minute oa.t w ..cat. The maple *ai taken :.t the op-.r.tor's alw.a.tr. The teat indicates 1,S30,000 purticl-.-u c: -uut p.;- cubic loot and 0.9 uillitfraa* -of lead per 10 cubic iKturs of air. TE. . JlxLnf dry liiifrealw.-.. , brw; .i.;ir4- coapotiTlua. . baceneflt of Ox .ice Building. Ota;. mjU^- to `;26 The oebeetoa and oti..;- .iry UjredU:it.. ex. ul..:..,*. ... t Julr.1 itiu ' Iraoeporutiur. to t;^ Cuwii uepurt . i.. (iw. . *Lj, u.:rt .iThe i/^rudiBnUi oru .cltf.v-v and tA.r. >j. t.. .. tr>MdXwU tn. : i^or tu^v>. *iu> ilxu j.Tbla location la ^uciv.tcd, anu n ..A.^,;t x'u. a.. u..(4 luataixftd u. tnt j*ool. Tue T> `T ArtAAn Ilr ifcrdoue Studief Fate i'J Inland -Iff. wWl^ion ililll will be odi.tted tarough opening:- .;. xu.-cr part of the partition. Jt `Sppoar* prudent for tlx* een to coni t:jl ::t o; respirators alter the iastal- iation o:' the tan. Ihe enclosan ani t~* icn vay be axpectuu to prevent too spread o: dust to other parts of tnv i.Usi:.* nut probably dll not constitute sufficient protect!oo lor tho ear. Irian ti*.- -.noloeuro. Cr. Schunate stated that the Fairfield _ix*r in the base..-ant handles 2 catcher, during the first shift ana una bate- ,,u.ino toe -econo. Toe contacts of the uixer are esptiec, via a dated opening to the oottoa, into boxes holding 100# each. About 20 oinutvs i- required lor uisenaxting eacu batch. On tac occasloa of the tost, u.'* --ppiy oi raguuor boxes was inauo-juate, end about half of the batch was uisu.Mrgca .r.vo a steel tote box eon transierud to fibre carbons. This cuctri handling -nci'.'nxcd tno cut.caotratiun of oust. Two atn are discharging the oixar. Ozt vu_ using a respirator. The two wort together and appear to oe exposed to cancantrutioc o; dust. In order to gat 100 pounds of tne alxture into the t'.xut, it is necessary for the sen to pack it with tholr bunas. This brings tn.lr faces into close proxlaly dtn the source of the dust. X .wwotllating duct has beon installed anovc the opening in the alxer, and rexoves :part of the dust. The taninal Is 8n x 10n, and the rate of air flow varied tg*M tSQ to 400 feet par xlnute. 3ha lowedlate vicinity of the olzor i- used'lor storage. Toe nearest own jFwgulorly employed la the vicinity cere about 36 feet any. Inauitriol trucks pass frequently through the eisletey beside the alxer. Tbs draft at the time . of the test was . variable in rule ai*a direction. The test indicates 23,000,U00 particles of oust par cubic foot of air. Because of -the intermittent nature of the exposure, tnls does not appear to c very serious. It Is prudont, of course, for the wen to use respirators. It also is desirable that the dust should not be pcrnlited to uccyjulite too extensively, especially In the aisleway where it would be disturbed and distributed ty the trucks. TCI fmnnn