Document Rav0rMBmRBvpLakNZE8QxwgE

FILE NAME: ALCOA (ALC) DATE: 1944 Apr 10 DOC#: ALC078 DOCUMENT DESCRIPTION: Internal Report - Industrial Hygiene Survey *'*i:>` ^ V- *',:-'i;F ' V - ...fc..-... , : V j%*`; Y\-v. 'il ] i!. Wif-;*'.-: ;i ;- : 0 0 0 0 I 5 l) 0 2 a 6 IN D U ST R IA L H Y G IE N E F O U N D A T IO N O F AM ERICA. INC. <1^00 FIFTH AVENUE PITTSDURGH. PA. - EXHIBIT S o fte n - f*T2' 1 v ` . vf,;'. .;* [" .vr !1 '.Hi- -: S r 'l 1 . REPORT O P INDUSTRIAL HYGIENE SU R V EY f ' f # MADE FOR ........ ;........... I.....Unitoci.Staton AGbostoo..Division.................... of ............ ..... ..... ........................... Rayboctoo-Manhat.tan,. l a c ....... ................. :............... *.............. ................. .... M.onholra, PonnsylTcnia.................... ............ March 14,15,16 and 17, 1944 IaH ;`fe- ':-s. In? 3 Bt ili 'H ' field worm d y .... ............. .f~r?!r:....................a..A..<..A..--... V ontilation Ansinooy LAOOIIATORY WORK BY.., Induatrial Hyalonlat A p r il..10 ,..194-1. In d u s t r i a l H y c i e n e F o u n d a t i o n o f A m e r ic a . In c . by *C .. t ySA r manauino D incero* ^T-001283 ./ - , C G 4 6 3 /J -/fS i | P P ^ v ' i ' f j W*. . ; ':^;: 0 0 0 <5 I :j 0 0 2 a 7 , M iO U 3 T n tA L MVOH'MIC O U N U A T IC JN O K AM CMICA. IN C . *>;: . V ' , v r ;' fLi' ) \ :;.-j . f> : In d u otrlol V o n tiln tlo n F.urvoy o f til ra; V'iiV .; , Uni tod Utntoa Acbentos Divioio.n o f Jinybooton-Urnhntton, In c. Isppy' .. V ` . ' : . v * : Unnholm, Ponnoylvnnin Unroll 14.1&.16 nnd 17, 1944. summar y Thlc lo n report o f u ntudy undertakon to locntn the moct Impor tant- courcee o f dunt nnd to dovoloy ad d itio n al dunt control acaaurca ut tho Uanholm plnnt o f U. C . Aaboatoa D iv isio n o f Roybootoc-Uanhnttnn, In c . m Sixteen duat counta woro mad in vnriouo depnrtmunt. Thoco samples V u In d icate th a t conditional In tho P ick o r Kouoo or not a e tio fa cto ry but dustiness In tlio Carding, Spinning and Tr/iotlnc Dopnrtnontn is looci than 5 m illio n p a rtici n por cubic fo o t . Recommendations aro nodo that can load to a reduction o f duuUnoaa In tho Pickor Uoupa un woll as In tho Cardins Copnrtmont. I t in boliavod that t/hilc tho curd room i s undor sonnidcrablo nog'itivo procauro tho conooqucnt starvation o f tho oxbnuat equipment la probably not In l t a o l f a u ffic ic u t to account fo r any markod reduction In uoulrol o f duot. 3 : . Tha roaulto o f duut counto aro lvon In Tabln ! M T-001284 0 GO $ i /** o o 8 8 IS : 0 0 1 S t) 0 2 3 *.,v. IWOlWiniAi. MVflMlflfCt OUIIOATIO>4 C>rAMCMI A. ff-ic. ??... 1/ ili ' In d u strial r o n tiln tlo n aurvey o f tir* U .8 . Acbcntou D ir. c f Hnybetoc-Monluittiiii, I n c ., Uunlioiu, l'eu, Uorch 14, .10, 16, 17,1944. lg - . .' '.Vi" V; fl Ki^; [\ '*]/ p/-' j &Hr L;tTr;V-. r&.* f*. s rf; ' Y',:."; - %;.. ... fi"- v -, i-*'V IC gL/ f;...f. - TAI1LE I 9 Du.it Counts * Snaplo Ho. Duto T Imo 24 3/14/44 1:50-2:01 P 2 7 3/14/44 1:35-1:43 P 21 3/14/44 2 :Ili-?.'-27 P 19 3/14/44 4:22-4:33 P EST 10 3/17/44 9:0C-10:42A Location and Operation Flckor Morso At Pon Crushers, to nearly oimuloto operator's exposure Floor Patching - llxposuroo of 2 T.orkors outside booth - Finished about 1:42 0oration of Pan Crushers for AmoaitcTJLno roprscntod completo cyclo of onoratim \. (l/2 hour dally) Dateli f.icdlng v o rtica l oponnr. Exrosurti of oriorator vittliin booth 52 tilm its corpi0 at contrai point o f roon fo r ".gonoral a i r ." near v o r tic i! oroncr P a rtic le r.cr cu. f 0.7 M illi 1.7 mil! 30.0 m illi 9. r a il!', 5.6 m ill Zo i 20 1 2 ESP 11 ': t\ . ` * 3 4 5 0 7 G Hot o : 2/14/44 2:39-3:10 V 3/14/44 3 :1 7 -3 :2 ? P 3/15/44 IO*. 54-11: OSA 3/15/44 11:15-11:25A 3/17/44 10:49-11:49A 3/15/41 1 1 :40-11: W?A 3/13/44 1 :1O - i : 20 P 3/1D/44 1:35-1:4 6 P 3/15/-U l.::;-;':00 3/15/44 2:1.9-2:29 P 3/15/44 . 2:45-2:53 P A ll pnrip.lrs viltli Uldgot P roci!tutor.) C o r d i nn Honors! a ir violhire about various cording r.acliinos in Droclcor Card Poem Dosldo point o f discluirgo from con denser to box in Breaker Cord Hoorn A t rovlu," end o f 4 fiu is h cards, g l , * 2 ,7 ,8 . Conorai a ir - Exposuro o f 2 nttcndnntu Aloni' contrai aialo-wny, at camel-back onda o f carde 4.0 te lili 3.8 rallli 4.3 o d ili 4.8 m illl Dotween fin ish er-C ard s, # 1 5 ,1 6 ,?!,2 2 . .A l l windows o f cording and spinning room opon 'vide to simulato suiairor con dition 2.8 a l i l i Spinning or.d ViIndir... At mulo spianar, v.-hilo follow ing oper ator, to slrmintn Ids or"osuro At Universal winders, fed flo o r , ad joining cards - following operator (no exhaust) At Foster Winders. Avorogu o f a l l olsle-vioys At T ,.In te rs. Aoravo of r ! l nlslo-vmyn At l--fr:n n a on 2nd flo o r . Avorogo nlon.-t nlido-vinyc At L - f resins on lo t flo o r . Avorogo aloni; nlslo-wcys 4.8 a l i l i 3.0 n l l l 3.6 m llli J -0 mil 1 1 3.6 m llli 2.0 m llli Impirgor oxcopt thoco marked LSP (E lo ctro sta tlc VV- . .------ ------------ -- ivi 1-UUlZoD iHDUfirniAk m v o i m m : i o i j m o a t i o m or a m l ih iv a . inc. 3. In d u strie ! v e n tila tio n nurvoy o f tb V. 5 . Acboston P lv . o f Raybcntos-Manhattou, I n c ., Unnholm, P a ., March 14,10,16,17, 194-1. lust cosrmoL in the picker iduse Operation o f tho pan cmahoro rooulte in oxconoively high concen tra tio n s o f dust aa shown by Sample 2>1 (8 .7 m illio n ) . I t i s recanmondcd that tha cyotaia o r ig in a lly denignod, wliich contemplated keeping tho doora of tho cnclosuro cloned, moot o f tho tlino, bo supplanted by tho follow ing arrongenent: Exhaunt from cuch pon crunbor hood a e u ffic io n t volume o f a ir to croato a v o lo c ity o f 200 fo o t per minute tlirough ono of tho two working openings whoso dinonnlonn should bo roducod to 2?f foot wido by zh foot high, it, io nurgostnd that inasmuch nn tho two opouingn t;ould novor bo nocoocary a t any ono tin o , doorway covers bo provided that nro Intorconnoctod so that whon ono i s opened tho other w ill clo so . Tho corors might bo hinged and th o ir cloauro motions connoctod by coblo ond pulloy or thoy could bo slid ab lo v e r t ic a lly ond n lm iln rly intorconnoctod. In any caoo a onug f i t i s unnocoasary and should bo avoided fo r naso in m anipulation. Thio plan w ill c a ll fo r a to ta l exhnuat copnslty o f 5000 c .f.r a . fo r tho four cruahoro. Patching . : Tho dust counto o f Soiaploo 27 and 19 in d icate that tho tv.o workers ntntionod outcidn tho booth ore not exposed to important dust concentrations but that tho nan who foods tho v o r tic a l oponer w ithin tho booth i s oiposod to concontrntlonn o f ofcout 10 m illio n p a rticlo o during tho actu al batching by tho two men outoido. Ulu nvorngo orpooura, o f courso, is loos than tid e boenuoa o f tho intorm lttont nature o f tho oporatiou. M T-001286 p 0000 I 500290 i N e u 3rr>iM. M v m e fjn * o u m o a t io m o i ' a m c d ii* in c . Indu etrial v e n tila tio n mu''/ ol' tin U. S . Acbontoo Div. c f Ilaybcstoo-Mnnli'jttnn, .Inc, lionhoim, F n ., March 14,15,16,17, 1044. * I t 1u roconmondcd that consideration bo glvon to tho oroctloa of a "batching bod" comprising n long narrow bin , locntod in tho p o sitio n whoro tho p ilo i s now mado on tho f lo o r . This bln uld bu oncloood end p.;-,. oshnuotod and )m o os an important olemont, a olde facin g tho oponor that may be removed or ohlftod by rain in g when tho botched mntoriol i s reedy for fooding to tho machine. Furthor ntudy d ll bo givon to thin at tho tiiuo o f tho noxt v i s i t . Tho urrongcraont la illu o tr a to d diograra^atically in Figaro 1 Tandem V e r tic a l Oroaor Thin u n it woo not in regu lar operation nt tho tlno o f tho ctudy but i t woo uppevronb from a b r ie f , opocin lly arrangod oporntion that con siderable duot louko from tho cnot iron cover located adjocont to the condeaoor. I t should bo possible to corroct th is vdthout tho op p licotion o f oxhnuot, eithor by replacing tho covor or by providing an adequate gaskot. * Tho giant cuttor, Johnson's grader, voGto machine and willow wore not in oporation a t tho tJLmo of our studios. 3 .% 0 0 0 l) r l> 0 0 2 9 1 , ?V . !; y' ,NOC/!TMI.t_ IIVr.lL'Mt*. FOUNDATION Ol' AhfrrilC.. IKC. > . # / ' Industrial votitllblion o f lhe U. G. sbcsfcoo D lv. of ' '..^"Itoybootoa-Uolil.ttttmi, la c . Uanhui, l* a ., March 1 4 ,l b , I f , 17, 1944 du.,;t c o m m in c a r p u s Studioo o f uncontrolled du9t Bourc90 around tho curding machines discloood tho follow ing: Food B o lls An npproclablo onount o f du3t originateo at tho food r o ll o f many o f tho fin lc h o r cords, which can boot be observed with on intense l i g h t boom. Some aiochiuos aro oqulppod with curved trayo or b o fflo a under th is r o ll * which oro o ffo c tiv o in rainimlr.lns duct at thin p o in t. Observationo on thin poin t, undo on sonov/luit looo thnji h a lf o f tho mnchlnns, uro on follow o: Observation F a ir (but noods fro n t to comoloto enclosure) OK Dusty 01C ` Dusty Du3ty OK Dusty OK OX OK , I t i s roconuoondod t in t ouch bnffloo bo in s ta lle d on a l l fin is h o r cards not `row oquipped. Thio ro in t was dlscussod p a r tic u la r ly with tho cord" room foreman. * ,)#;*'* .v*' Vi 0 0 0 ! S U 0 2 ) 2 i m o i j ?*t i #ia i. -imiriMt: r o u r i D A i i O f * o r a m l iv m *!., i m c , In d u n trlal v u n U ln liu n jiurvo/ or th< U. 0 , Aobaoton D ir. or Itaybootoo-Munhutlau, I n c ., UuuLioim, P a ., tiarch 14,15,16,17, 1944. Wiper R o ll end Rub ftpron ' Another duot source ic at tlio Junction o f tlio wiper r o ll and tho d o ffo r. A p a r tia l chock ol* mnehinoa waa made with the conclusion that an appreciable amount o f duot occur* at tliia point in tho caoo o f tho follow ing finisher carda: . Humborci `S , 4, 9, 10, 17, 13, 23, 2 i. \ I t wno noted aloo tbnt somo duot originatou froci the rub aprons and olnco tlioeo or odjnennt to tbo wipor r o lla i t nay, fo r purpoooo of co n tro l, bo conaidorod tbo cmo courco o f duat. I t if! roconntondod fo r tbo top act o f r o lls that a romovnblo cover & . br. provided c le a r over tho uppor eot o f rub nprona tliuo, in e ffo c t , extend in g tho prosont oxhouutcd oocloauro ond rendering th ia duot oource nubject to tho ln flu cn co o f the prooont oxhnuut. I t any also bo advlnoblo to re- novo ono -otavo a t tho lowor ond o f tho e x is tin g oncloauro immediately over . the. d o ffe r r o ll to f n c l li t a t o a ir flow through the oupplcvnontory enclosure. . s': For tbo lot/or rub npron and v.lpor i t io raeommondod that aomo oxporlnontal 'work bodnno on a )od ao nuggoMted bolow. V/e lllu o tr a to in Flguro 2 on oxliauut hood or o lo t which ia d oa lg a o A to bo p l a c e d im m e d ia te ly ndjncont to tho wiper r o ll a t tho poin t whore i t joino tho rub apron. In t;-K* ( tho ducign illu n tru to d na attempt hna been rnadd to reduce the width o f tho hood to the smallont poaaiblo dljnonoion in ordor to avoid intoriorenco, with propor functioning o f tho machine. In th is prelim inary doclgn wo provido for: V ' T i #r ' M T -001289 m: m m WsSr.'-.aft* & ooun is oo2v j INOUSTniAL UVOICMr. I'CUNUATION Or AMrnir V INC. 7. In d u strie! v en tila tio n owncy or thy U. G. Acbeaten Div. or Eoybootoo-Uuhk/Htun, I n c ., lunhoiin, l*o ., Uorch 14,15,15,17, 194. 9sif Sp (o) an a ir flow o f 73 o .f.m . por fo o t of longth, (b}> n fuco T e lo city o f "000 fa c t per minuto (to old in offoctliw ; good d in trib u tio n along tbo length o f ooch olo t auction , and (o) elim ination o f cxcuacivo crooc sectio n al area in tin tra n s itio n section in order to m aintain adequate vo lo citio o fo r tbo transport o f m aterial. A p a r tia l comproral.no ban boon incorporated In tho design to avoid a too ccnpliontod Lood bat i t i c boliovou that tho lowor v o lo c itio o at tbo la r g e s t ' noetion of tho tran o itio n w ill not seriously interforo with it s proper functio Hot ohown on tbo diagram aro nocoooary ploceu at tho endo which ,*1X1 extond to tho nldo franm ijim l oorvo to support tho unit in p o sitio n . I t would bo ndvir.nblo to huVo a q u ickly dotuchublo connoction with tho branch duct thnt w ill lend to tbo axhnuot main overhead. Itemnvo Exhnuut Copueity Tho follow in g obsoi-vntlono in d ica te that thoro I s adoqunto oxhaust capacity fo r tbo mipplcracntcry oxhauat boodo iloscribcd nbovc. Tho capacity o f tho oxbnuot oystcu ind icates aa average o f TOO-fiOO c .f .m . per cy lin d e r. Sono in d iv id u a l monnuruDonte o f n ir flows in d iffo ro n t brnuchon wero made by raoauo o f s t a t ic auction mor\6uromonto-ond v ltli tbo dauporo in tho p o sitio n that had'boon sot by tbo operators o f tho cording \ department. Thoy indicate, v/lmt waa conoldored adequato by the operating porconnol aa judged v is u a lly . Ao may bo soon from tho m o u lts in tho follow ing toblo thoy vary quito widely. MT-OOl290 11! f 0 n o n " i s o 0 . 2 9 *! iOUOllllAU HVOIBNIJ roUNDATIOM or AMCMlO.V INC. Industrial Ventilation survey of tho U. S. Aobootos Di7. of Uaybootoo-Monhntton, Ino., Mnnhoim, l'a., Uuxch 14,15,16,17, 1944. [f!> ';s': .. A ir Flown Tlirouph IndlTlduol Cord lloortj (Taking Damper Adjustment as Found) Unit S ta tic nuction A ir Flow //I Finisher ' #3 Finlnhor i/S Eroaker #3 Franker ff3 F in ish e r #4 Drookor ji5 Breaker #5 Flniolier l/31 Erecleor 1.9 inchos ' 1 .0 n 0 .6 t 0 .0 H 0 .4 n 0 .2 w 0 .6 n l.G H 1 .4 1 920 c.f.rn 670 If 515 Tf 590 V 420 If 210 If 510 n 040 it 790 if . V I t ifl p o r tlc u lo r ly s ig n ific a n t that oven In tho enso o f i?3 F in ish e r oud //4 breaker no oacnplng dust could bo detected at any poin t. Thlo lndir.atoo thnt thorn la conoidorablo rooorro capacity. .*-K` *- MT-001291 0 .0 >) i) I 5 0 0 2 9 5 : I M Q U E T H f A L M V m V .M It f O I JM U <VTlOM O f ' a m c h i * a , |M C . J . f_ In d u stria l v e n tila tio n survey of tic' U. S . Asbestos Div. of RnybuBtoo-linnlifltlan, I n c ., llunhoim, P a ., Uurch 14,15,1C-, 17, 1944. AIT( KaiAUST AI1U SUIPLY IM VAK.T0U5 DITAlulTTHTS Plckor Hour With a l l dooro und vindor/a closod , qo I s the caoo in vrinter, tba P ick er Houso fas found to bo under a negative prassuro o f .1/2" water column. While th lo la li k e l y t o -starve at le a s t oowo o f the ozhaust otiuljraojit.y.o boliovo tho duot courcoa onunoratod nbovo nro o f much creator importance than th is fa c to r and should roculvu prior n ttou tion . A tab ulation of G r is t in g oxhnust capacity from th is dopartmont is given in tho tab lo bolow and la besod p r in c ip a lly on tbo measurements mado by Mr. Bortolot und Ur. G ilp in . Rrht.uot C rro clty la P icker Hqmsp Unit, Capacity O ld Shnkor Scroon Cotton Uachl no Willow and Tendera V e r tic a l Oponor Mow P . & S . Gredor, through Condonasr over ohnker scroon How oboknr ocroen, through condensor In card room C.O.D. 15" Pipe to JJronkor cord oyotari, from pan cruohoro, e tc . (oatlmatod) 2500 c.f.m . 2900 C .f.m . GOOD c.f.m . 3400 c .f .m . 2900 c . f . m . 2-100 o .f.m . 2L00 c .f.m . Total 22G00 o.f.m . Unbnlonco in Curd and Spinning Poportmeut Tho menuuranent of air flow from tho carding oxhnuat ay-atoms together with othor data obtainod from Llr. Dortolot io tabulated bolow to i n d i c a t e the to ta l volume o f a ir oxhnuntod from the room. V '- ' y - l i ' T 'lv ir M T -0 01 29 2 004591 I I) 0 J .! I S 0 0 2 9 6 ^ iN o u u rn iA i. h v o ic n k r o u n o a t io n ow A M cm cA in c . 10. In d u stria l v en tilatio n ourvcy o f tin U, 3. Asbcoton D ir ., of Roybeotoo-Lioniiattou, I n c ., Hanboim, r a ., Uarcb 14,15),16,17, 1944. 0 j Curdo 1-12 Cards 18-24 L-froucn (oldor nyr.tcm) L-frarano (newer system - estimated) 18,000 c .f .m . 17,000 c .f.m . 13,000 c .f.m . 13,000 c .f.m . Total 58,000 c .f.m . t Tho a v a ila b le data fo r the breaker cord room aro as follow s: , 1 Eht boll' (double fan) L e ft h a lf (doubla fau) From Plckor Hound (estimated) c ,500 c .f .m . 7/300 c .f.m . 11,500 c .f .m . 2,500 c .f.m . Hot from breaker room 12,000 c .f .m . . i i Como a ir la auppliud to th la flo o r from tbo f l r o t flo o r C arrier uysten but thoro I s a d e f i c it fo r tho carding; and opinninc deportment o f about 32,000 c .f .m . Tlioro i s , however, on a i r oapply un it in th is department v.ltb a . s ' 9 , capacityaf 36,000 c .f .m . which i s oporating at preoent an a heater only end ronuiroo m o d ifica tlo a (brought out by U r. B ortelot) to pormit i t to handle outdoor a ir d ir e c t ly . Tho noeoosary clumgos should bo e ffo c te d . Tho cumc io tru s o f tho bronker room whoro a u n it with a capacity o f 10,000 c .f.m . requires m odification to p om it i t to supply properly tempnrod outdoor a ir to tho room. * E ffe c t on Punt Control P i t o t tubo moncui'octcntD wore mndo on one o f tho main pipoo with tlio windows opon and w ith windows clo o o d . In the former cuco tho v e lo c it y wan 3100 fo o t per ininuto and iu tho l a t t e r coao -2970 fo o t por m inute, a r a tio o f 1.03 in d ic a tin g a E# incroaso In n lr flo w . ThoGo nonsurementn aro not considored oxnct. - CP'' MT-001293 m m m .:: ' 0 I) 3 I! i 5 0 0 2 9 7 11. . i r i o u a r r t i A t . u v a i r r . C r o u N U A T ' o r i o r in ?. In d u stria l v e n tila tio n currey c f fclio U. S . Aobeotoo PLv. or ' iiaybcntoo-Muuhnt Urn, I n c ., Munhoim, P u ., Unrcli 14,15,16,17, 1944. * Tho ch a r a c te r istic curvo o f tbs fan (American Dlowsr Company, o tccl plato fa n , if30, at GG2 r.p .m .) Is shown no Flguro 3 and as may bo soen from tho u n alysis Indicated thoroon, an lncroaso in a ir flow o f 10 to 155 may bo expected by roducipg tho rooiotanco by 0.4 inchca. One would hardly expect m aterial d iffe re n ce in tho operation o f tho exhnuot oyaten with such a m a i l, pci"contn;;o lncroaso in a ir flow . Dust nrnplo JTSP 11 3hovs a concentration, with a l l windows v.ldo open, o f 2.0 m illie n p n rttclo s, os agnlnot concontratlons of over 4 m illion (fo r exomplo, couple j}l) taken two doyo e n r llo r . I f th is comparison 13 to bo eonoidorod representstlvo i t must bo duo to tho ad d ition al (jnnoral v e n ti la tio n caunod by natural a ir currents through tho open windows. That i s , in worm woothor, with a l l windows open, a volume o f general v e n tila tio n in 55 eddi'tioa to that causod by oporertion o f tlio exhaust system w ill bo ob tained' sad nuot nft'oet tho dust s itu a tio n favorab ly. This would n ot, howovor, in d i cate markod improvement in v/intor by providln,; Juot tha proper volumo o f , mnJco up a ir . Such unbalanced eonditiono are alwaya lik e ly to cauoo dlncomfort bocaupo o f d r a fts that occur in tho peripheral arons o f the room, bo i t is recommondod that correction be made. M T-00i294 0 0 0 0 I 3 0 *J 2 9 3 I ; >-- > in. | | < , ', ' iinNmn umiiT M iM . H v n i c u s r o u M O A r w o n t j i ' a m c k i c / i n c . Induotriul ventila tien nurro/ of tb- 'J. s . Asbestos Div. of Roybcotoo-Llnnhatfcna, In c., UuniioiiB, l'u .; March 14, 15, 16, 17, 1944 !.r h n * * 'V. 1 twistiks DiyAim-Ouirr . ' , No condualono woro rouchad with regard to improvod dust control 1' * In t ills doportuient but data on the o'rhauat capacity and volume o f a ir ouppliod by tho C a rrie r oystra In reportod bolon. With tho asBistanco o f U r. Bortnlot and U r. G ilp in wo nado CA roadInga o f lin e a r v o lo c lty at tho face o f tho pro-bento?, whoso oroa i s G1 s q . f t . , and concluded th^t uudor conditions titon p re v a ilin g tho tjyatcia wao dolivorln g 00,000 c . f . n . A cap acity o f tho various oihaust syatums has beon ostinatod by U r. B ortolot un follow s: Foster 7.'Inders hast Fan V/oat Fan Tv/latlna Mnclilnoa North i'en South Fan Con Winders Total 3300 c .f.m . 3330 c .f.m . 11000 c .f .m . 11000 c .f.m . 5000 c .f.m . 33COO c .f.m . 1. 'ir * 3 MT-001295 004394 rs*mrrr~GCTz: nrmzrrr r^j^wxzrri 0 0 ;j 0 I 0 0 2 9 9 13. in o l /bt w iai. H v o in in t o u n d a t io n o r m c iiii;. i n c . In d u otrlal v e n tila tio n jurmy o f thn U. S . Aabootoo Div. of ' Hayboatoa-Llanh/ittan, I n c ., MunlioHi, lu., March 14,15,16,17, 1 9 . HUCAPIIIILATIOH - - AIR ECUAHST Aim SUPPLY Totfil E7hTJ.it c.f.m . c.f.m . Soiircn , 2 2 ,00 . 12,000 50,000 3 3 ,COO 17,000 36,000 26,400 33,600 Ir E x istin g C arrlor U n it, 1 modified . r Existing Corrlor Unit, l_ modified -Overflew l`ron Twisting L Department f Hociuirod portion frora era j oblo supply of 60,000 fro: main Carrier syata:a I t appears iron tho tabulation nbovo that thoro oro uvoilnblo manna fo r oupplying o i l rocpiircsnouto wzeept that fo r tho Piehor House. I t ia beliovod th a t th in may bo cared fo r by a ir cleaning un its to permit roeixeu- * ln t io a from none o f tho syatemn handling 3raall omoiints o f duat. (See following so ctlo n .) I rI- if M T -0 01 29 6 r r> 0 0 0 1) 1 5 0 0 3 0 0 iN au u rn iA i. w v c i c i / r r o u N U A r i o n o r A M c n i C A . in 14. In d u strial rc n tiln tlo n nurrny o f tho U. G. Asbooton Div. o f ` Jteybooloe-Muahattun, I n c ., Munholm, P a ., March 14,15,16,17, 1944. AIR FILTRATION An offoctlTa duot co llo cto r which w ill produce olran air 1 .9 ., one with a duot content o f looo thnn 1/4 m illio n particloa por cubic foot, would viinro valuable nppLicutionb. I t could oonru t.o roduco tho unbalance botwoon yv;: 3 a ir orhaunt und u ir supply by drav/lnr, o lr from tho duot houoo ror r o circu la tio n and also would p o m lt d iro c t ro c lr c u la tio n from nomu of tho exhaust oyo- teme t in t handle r e la t iv e ly small amounts o f duot such do those fo r tho L-framoo and fo r thu windoro und tv.lotoro. Wo have in nlnd p a r tic u la r ly tho 1 indicated d e f i c it o f obout r.5,000 c-.f.m . for tho Plcicor Houoo. R oclroulation o f a ir froia dust c o llo c to r oyotc.au whoro tho duot in in h eren tly Lnr.nrdouo to hoolth 13 gonornlly frov/nod on and v/o axo among .3 thoso who u su a lly rtlsoourngo the n rn ctico . This la bocau:io o f tho d i f f ic u lt y I o f m aintaining ouch oquin-nont so 03 to os/julto the purity o f tho a ir returned. However, I t in not ofton that thoro aro oconomio laeonti7oo as great ao in tlio pronont caoo. Wo boiiovo nn oxcoption 13 v/orrantod hare and rocomnoad ce rta in prelim inary oxporimontntiott which vd.ll load to an adoqunto ojastau , tb .it V7111 ovorcono tho objoctiono uoually oncountorod. I t io rocotxnondnd fo r thin purpooo that a m all uuit bo couotruotod fo r connection to the duot bouoo o r to a ayntea sorving Pootor windoro or L-fraam n no that toots in clu d in g dust counto in tho o fflu o n t a i r can bo conductod. Tho UDit illu s tr a te d has bage 6" in dlnmotor and about 7^ long % providing a clo th aron o f approximately 10 oq.- f t . por tubo. This unit oan MT-001297 0 0 0 1) 1 5 0 0 3 0 I * * *'/. 0 MBUKT RI AL MVOICNK POUMOATIOM O f a m c h i c .. INC. 13. j ' V _ it In d u s tr ia l v e n tila tio n aunoy o f the U. 3 . Asbosloa 017. of Koyboaton-MnnltaUan, I n c ., 1.1onhoin , ? o ., Mnrch, 1 4,15 ,1 6,r ( 194-1. bo inado'vdth no mnny tuboo an dosirod. V/o chow olx fo r a to ta l of GO sq.- f t . ; and whooo capacity may bo rmynhoro from 100 c . f . a . .to GOO c .f .a u , dopondinu upon th o .a p p llc o tlo a . I t In contemplated tliat tho clo th r i l l bo plumed with flomo In ert dunt prelim inary to actu a l uco, fo r oxnraplo llraeotone duat, u n til r\ ita p r o llm ln n ry rooiotauco 13 0 .1 to 0 .2 inched at a f ilt r a t i o n v e lo c ity of 1 f.p .m . Thin w ill probably roqulro about 1/2 ounco o f duot per sq. f t . of cloth area. Tho donign 13 I llu s t r a t iv e on ly. I t may bo ndvisnblo to incroaoe tho also to f i t an a v a ila b le blowor. Further, to avoid tho inoonvenionco o? fin d in g u oourco o f flupply fo r tho email quantition o f f i l t e r c lo th roquired I t io auggootod that bogo be oi'dored from manufacturer o f such c o lla cto r3 , In v/hich cuao tho motal c o lla r s and othor portlnont dimensions of tho housing would bo ohangod to accommoduto tho bogo. E ith er of tho follow ing 13 suggested: i C, Jf. Berg Company Eaot Dedham Streot Boston, Ma33. Parsons EnGitnoring Company 3599 Eaot 82ud Stroot Cleveland, Ohio. M T -0 01 29 8 BU.1 vV*:- `' v*.*V/'1- <Vd; --'if-. ;*. :'" 0 0 0 0 I 5 0 0 - 3 0 1 W B U W B t A k H v a i e i i * p o u m o a t i o m o p o m c m ip .. im c . 13. J . ^ In d u stria l v e n tila tio n surrey o f the U. S . Asbestos Di7. or ... Kayboston-MnnJiaUnn, I n c - , ticnholn, ? o ., March, .14,15,16,1'., 194-1. bo nmdo'vdth as many tuboo an doslrod. 7/o ntcw oix fo r a to ta l of GO hq.- f t . , ] and v/hooo capacity nay bo nuywhoro from 100 e . f . a . . t o GOO e . f . a . , doponding upon tho a p p lica tio n . I t In conttvnplatod that tho clo th w ill bo plucked wlt;h r\ flomo Inert dust prelim inary to actu al uco, fo r oxwuplo liraootono dust, u n til lt a preliminary roalatanco is O .l to 0.2 incheo at a filtr a tio n v elo city of 1 f.p .m . This w ill probubly roquiro about 1/2 ounco o f du3t per sq. f t . of cloth area. The donign in illu s t r n t iv u on ly. I t may bo ndvisnblo to incroaae tho alzo to f i t an ava ila b lo blowor. Further, to avoid tho inoonvenioncu of fin d in g d oourca o f supply fo r tho email qu an tities o f f i l t e r clo th roquired I t io auggastod that bogs be oi'dored from n manufacturer o f such c o lle c to r s , in vihich cuoo tho metaJ. c o lla r s and othor pertinent dimonsiono of tho bousing would bo clinngod to accoinmoduto tho bags. E ith or o f tho follow ing i s suggested: i C . Jf. Berg Company Eaot Dedham Stroot .Boston, Ma33. Parsons Engin-ioring Company 3509 Eaot B2ud Stroot Cleveland, Ohio. MT-001298 ' " n o 6 i) l 3 o o o o a tNtituiTfviAf. H v c i r n u p c u k o a t i o n or i.iiim r v i n c . ' 16. In d u strial v o n tiln lio n aurvoy o f tho If. 5 . Anboston Di7. o f ncyboatoo-iianhatton, I n c ., Unnkolm, P a ., March 14,15,16,17, 1944. m SUMMARY OF RECO.'3AniDATIOK5 P icker Houao 1 . Modify oxliauct fo r poncruohor hoodo, providing 1250 c .f.m . por hoed and intorconnocted hingod doora. 2 . Repair cnat iron cover on Scco-lov/oll v o r tic a l opener whore dust leakage occuro. 3 . Conaldor tho in s t a lla t io n o f a batclilng bed oncloauro, with, movablo aido and o lr exhaust in volumo to create foco v o lo o ity o f 100 f.p .m . J (Soo page 4 and fig u re 1 .) Carding Mnchinoo 4 . I n a t u ll currod trays under the feed r o lls o f tho fin is h o r cnrdn roq u irin c them, (Goo pego D.) 5 . Conatruct oxporlmontal rumovablo cover fo r ono or two fin is h ' cards fo r dust from upper vdpor r o l l nnd rub opron. (Soo pago 6.) 6. Conatruct orporiaiontol slot-hood fo r lov/or wiper r o ll and mb apron. Provido connection to oxlmunt oyataw at n convenient locution fo r tooting and onothor for attachment to ono or two soloctod mochinoa. (Goo pagan 6 nml 7 and fig u re 2.) Air Filtration J 7. Conatruct a node! f l l t o r duot o cllco to r for orfloioncy toots with arrangemento fo r connection to duat houno fo r ono toot and to oplnning nnd tw istin g cxhouut fly3taw for auothor. (Soo pogo 14 and flgu ro 4.) I t would bo advlatiblo to comploto moat o f tho nbov9 p rior to our noxt v i o l t , e sp e cia lly Ilos. 1, 4, 5, 6. - MT-001299 jx o n O' O 1 - 5 0 0 3 0 3 IHDUWTni/w. M\lL'MC f O U N P A T P l v i I* .MB ilr: v m e . In d u strial v e n tila tio n turroy o f the U. S . Anbnnlou Dlv. o f Kiiybonton-Muiihatlfin, l a c . , Minihoim, L'n . , Uurcli 14,15,16,17, 1944. E.M. 7 KLKCTKOU MICnoSCOPE KCAi.lIlfAJIOH OF UU5T For Asbestos I t wao l'o lt that an ornjainatlon o f tho alr-borno dust by tho oloctrou olcroccopo would throw some addition al lig h t on the fundamental r problem o f oobostoola oven though wo drew no d e fin ite conclusions thorofrom- Qno oclwol o f thought maintains that tho pulmonary condition rooults from a mochfmlcal o c tlr a of oobostoo f.lboro on lung tis s u e , yet t ho dust seen i n counting la alnont a ll r.on-flbtvua. Through tho ocurteny o f tho roooarch labo ratories o f tho Aluni.uura Company o f America, which la n mnjibor o f In d u stria l liyglonn Foundation, olo ctroa microphetagrtnihs o f alr-borno duct have been obtained and nre nppondod heroto. The dust wan co lle c te d v/lth tho o lo c tr ic preolp itn tor In tho oarding room. Two quootlona woro propoundod by uo to tho laboratory, no follower 1 . Aro tbo cu b ical (non-fibroue) p a rticlo a that arc scon in tho li g h t microncopo uood fo r counting a c tu a lly composed o f unbrohon bundloa o f flb o r as in tho parent rock? (P a rtlclo o o f thin shape comprise over o f thooo soon and counted.) 2. Ia thoro a largo quantity o f flb ora whoop length lo sovornl mlcrono but will eh aro In v is ib le by tho lig h t f l uid sot-up boenuso thcl dlamotor 1 below tho lim it o f rocolutlon? Thn report Includod tho follow ing: Limits of. light microscope M T-001300 C04SS9 .r~v.w.'' r .cscT'.jEj":' ' I N I I U S T K I / . I . M Y G f C N I ! F O U N D A T I O N n r A M C V 1 I . ! A. I N C . IB . In d u stria l v e n tila tio n ourvny o f the 0 . 5 . Aubontoo Dlv o f Hnybostoo-Hoohattiui, I n c ., Miuiholm, P a ., llurch 14,15,16,17, 1944. * "Tho duat wno found tp contain many fibroua p a rticlo a aa woll ao non-flbroua p n rtloloo no ohown in F ig . 1. At tho m aGniflcation uood for tbLfl nlcrogruph (DOCOX), Iwt.ovor, tho non-fibrouo pnrtloloo may appear to prodoninato. Thin la not tho cnr.o und no doubt rouulta from tho aat.nll olr.o o f tho flboro ua rami notion ut liigh m agnification ohov/a that much o f tho mntoriul ia pronout no small fib aro oa aliovm In F ig . 2. Tho fib o ra woro found to rongo in lan gth from n fra c tio n o f n micron up to a fo.v microns with on Q7ornKo le n g th o f bout 1 micron. Tho tlilcknnss o f tho s n a il fiboro rangod from 0.01 micron to 0.05 micron (100-500 /vngatvom unlto) with tho nvorago oloaor to tho lovror lim it . "Tho naturo o f tho non-flbroua pnrticlou probably is ns uuapnctod . that i a r thny conalat o f bundles o f fib cro which havo not boon brohon apart. Thia la evident from a fow o f tho pnrticlon in F ig . 1 and p a r tic u la r ly fromtho p n r tlc lo in F ig . 3. Several fib o ro protruding from the ond o f tho largo bundlo aro ohorm In tho la t t e r micrograph." MT-001301 . '-.V- M J!?* . It : > /: V S ; V K * ,. V* . * ,' * : , X . fc ' V / t r * *: v s': :i : *. . ' * . --4 /. . -X> . . 5 .1I LV 1 *, A % *,.i y :- -V V V .V r . - A ., V . . " \ `u . > ' J n*M ? # 1 u 'O i* : .1 :.:.* - t - " 1 ** t.!v C ** *> ?j. M T-001302 *rv~^ 5 ^ _ M T'01303