Document RJZznXKbE4zvnYV9erE55amjE

CLAIMED ppjVlLEGED { 3^ OCE 5SP057 3 I -oiS KAYLO D7TISJO:' PLAIT Ovwno-Illinois Class Ccr-yr-vr: Ba;.*rovillc. I.'sv: Jersey May 22, 3? til irTTCriuAL KT3LTM S3T.TL by Thi Saranac Laboratory' Saranac Lako, Get York Arthur J, Vonrald, U.D. Biroctor, Tho Trudeau Foundation and Che Saranac Laboratory In cooperatior. L'dwarc C,, J, I rbar Chons s L* Darken Donald A. Bailey PLAINTIFF'S || EXH/BIT 18 -QC23SLi22 PLAINTIFF'S EXHIBIT WV-OOOlfc 08 008 1155 Kcport of Industrie! hygiene Curvsy of F.uylo Livision Plcnt. Ov.-cxi-j:llincir Cics: Crapsty Scyrcriile. ilcr icresy CLAIMED PRIVILEGED BY OCE i\ rirv.*y of the Rcylr livisicc nl.s::h ef tbo f~ t:. c-Illinois io: ed ct Soyrcvill;:. r:-ay. wcr.r.ri7; LI. . 2tv/.:-.u i-.-f. E. C. h-Vta ci LI-.; icrcnce Lr.hert.t0r5* :.v cr. ' of hho <ircr.s--3.iiL:.5;s Oct-pr-cy, Ves v.t. pose cf vi.-.. /r.-or-c the o-.rr. uieat snd to ...itorr.-cr "h'-thor r ... ^..t (!'' .... i> \i I.? W ... . ... c .. t^;.* ..... .J. . -.1 JL ertv.. jj.j SS|S uSer-S.,,. Ui,! J.C.O|f- IE e S.5 too:..-.-, cos '.ire nt.Cs to dstc/nicr- the iC'.i treticr. of rie - rrr.or t: v.LL.i- the v:o:-I-.-en -erf <.:*.: set, 'wtor. r:r--i-.s .*.* .-....' rvrovIf. b`..a a aC wb *4 4* HXm 4' ai W **# *'(- b J . . a ' a 1 b cl.-tu-r rorvio that ihr ...tutu cf I.r..:ir:cuc fret till;: . vtnrri.ivr.ir it- the cirflea\;cd it';: viol ootid ho I: . I.-, vovo of r prepared paper "rich cfdiciirsl;- ret; it:if. fv c.-.o ts rii.il :>. .01 nierens in sioo. Luo rf fr.-t- o Liver pr* or res xtlco-a co Junucry 50. vdtilo vhc dost surrey ".i.: Lo.v..i. tn.-.'e. . ether sis rare collected lr.t*r by Jc;* -.ordo: of c..s -J-c: t-Iliiv. Ccnsaay. fba rc.r materials also rsi'.* entoitre .r.c their ccrporf cetenic.su cppresiastelj*. Ceoigsiticc of Uotcri:.!: tr.d ~o r.tvth fnc conporitioc end parhiuic site of the tvir.; ft:l vtv i.-tr ; b.Licli arc used In tha Banufachcre of Lho product L.y j._ etc indittitof. table 1. In edcitian to i}* nzterieln lisvr.d. sr-tll r w cf 08 006 1156 1 Produced under C ourt O rder In M art CLAIMED c/ilegeo Orns*-I5.1inci ? Kay 2, 1?51 ( BY OCF and cement ere required but these too items cro cot related to any dur.t hassl'd. Cf tho six ro7 materials described is table l, ell except quid: lire must bo regarded us potentially hazardous end capable of causing t serious pneumoconiosis. Inhalation of emosite or chrysotilo ecu produce esV-ostcsic end inhaletion of silica flour or tripoli oen cause silicosis. Diatoriaccous earth on iuhcletion is capable cf producing a diffuse fibrosis rhieh is unlike silicosis or asbsstosis but rhich may bo quite disabling. The finding that tho osrslo-of amosite had a quart* content of 21 per cent i3 quite surprising. It is thus apparent that exposure to this cex'- aorcial fore of csosito nay present a potential hazard not only from asbestos fiborc but also from frse-cilica particles. The finished product, Kaylo, appears to consict principally of crystalline form of calcium r.ilicato v.hich yields a characteristic ::-rcy diffraction pattern. Petrographic one chemical examination. rovealed, however, that other constituents aro present in the material. A sample of light grade Kaylo was shorn by analysis to here a quartz cost3nt of about S per cent; foV the hoary grade the value was about 5 per cent. Both grades also oontained noderate ezounts of asbestos. In a sample of the' light grado the asbestos vas in the form of chrysotile which comprised approximately 5 to 20 por cent of tho scmple. For a sample of toe henry e grade the chzysotile content was estimated to be about 5 to 10 par cent but, in addition, about S to 5 per cent of amosite asbestos was seen. Carbonates made up about 1 per cent of each grade of Kaylo. 2 08 006 1157 o |o d is trib u te d except li CLAIMED PRIVILEGED Or.*r r-Tll.'.rc:.*Uy 2?. IS 51 ( BY OCF Concentration rxd Composition cf /trocoheric fust CJjo concentration of tho atnosplizric dust to which tho v/crkscn *.7src exposed at various points is shown by the dust countc ic table 2. Infer' ration pertinent ts the operations cr conditions, at each scowling point ere included in tr.o taolu. A euwurory cf the dust counts is ns fellvve-. Particles per cu. ft. Of i Sarsle Smaller than lCu Ltrear N Router machine 4.4 si11ion 2 Center aisle om Eaten weighing rocs 3.4 B.4 0.56 0.26 4 Asbestos unpegging roar. 6.9 o.k 5 East finishing line 6.5 0.45 6 Pro-bardsner 2.2 0.45 7 Tizer balcony 5.2 c.oc The ccapositicn of the isaterisl suspended :ji the air at sever, .-retentative locations is revculod by the analyses is table c; iron tns cat:, in table 4 the freight of dust in the atmosphere at those seven locations eaa be calculated. Thus, the dust load of the gcnoral plant air (sample #3A) was 0,2 gras in about 17,000 cu. ft. of air cr 0.01 Kg. per cu, ft., while the dust load of the atmosphere at the other locations ranger ire:. 0.06 to 0.4 mg. per cu. ft. The hazardous fraction of tho dust consisted of the free silica components (quartz and diatonaceou3 earth) and tho asbestos components (esocite and ehrysetile). Cheso hazardous scortituents generally made up a large portion of each dust sample, as tho - 5- 8 006 1158 ( folloriPG title revealt: CLAIMED PRIVILEGED BY OCF d is trib u te d except In llj p' li\ !>{ li Ccseral -roi^hirg ore: ZL Asbestos ts.il: w.* Ocncral plant air / .* ilnishii p lire 5*. Router rxaLinc w(*`.r Doncer end true!: 7t\ Ashe etc a chracdinp, rsen Free siliot ccr.nc-3cr.ts per cent 4C'C5 1C-20 1C-50 5-2 i*-5 4-7 22-24 Astertoe corerr-.r- p-.-r ccr. <7 * 0--ES :;.n-45 i.3-23 v-i; if* f* .. 2 21 - o o :? j Hi 4 i. Oeo tbk --vt cerrralftiag tha values for eoneentraticr.-. r id cc~ st:.-.a spheric dust at cash sas:.lir*j point. ts fair ids .. of duct hararci at thane oeints ear. he obtained: Ateospheric 7. Canesntratior Co.-sec: Fancies m Particles par cu.ft. of r.ir Free silica, ccrreonents c o -;.orfr I per cent per cc::.v. 1 and SA Router machine 4*4 million 1-3 6-1 c 2 " SA Center elclo S 1A 5itch weighing roan 4 " 7A Asbestos unbagging rocs 6 4A Seat finishing line 6 3.1 "re-hardener 7 2A m CA Mixer balcony; asbestos tank 3oxcar end truck 3.4 8.4 6.9 8.5 2.2 5.2 16-SC 40-55 22-24 5S 15-30 10-20 4-' 2-5 **rW\ zv*> f ^ V w(. *zr~ m v- 4D o o 00 y,..Z: CLAIMED IVILEGED by ocf O\:cnr-rilj"oi;: I'ay r\,, 195J. Cg;:t Thn results of tho duct Purvey, v.ich included the analysis of rsTT enteritis and ctKocphcric dust and a Halted rusher of du3i cc-i-.tr, rale>3 it apparent that ccnsidor&blo attention had been Giver in tiiir plant to the control oi* duot. Exhaust systems ef removing tho duct !v.-:L been icutcllcd end the tatcvni of duct suspended ir. the plant utnssplu: scs ruv.-ialad by the survey to bo ot relatively la.? IovoIe* Since-, sirover, in easy arses of the plant barerc ous frss silica ecd r.'-'ceatos mineral:* comprised e 1nrgs portion cf tho air-Cioetad ssteriul. it is very ic;crtaat that effective dust centre! measure:; cs rairtr.insc". at ell ticss so that the dicsoniacticn of unsafe Mr.cv.rtc of duct into tLc atmosphere Till he prevented* A Buuber cf agencies hsv* suggested threshold or nanism r.iiorrnYic limits for the concentration cf dusts in industrial atmosphere. la 194S the Ivparcrent cf Health for the. State cf her Jersey inferred: Z::.c Saranac Laboratory that the Dopertreat follcred a 'Sr-ritnry Ccdsr -.v.ic'.r rocotsnends certain threshold licita lor dust cnpa&urc. A ssni'.vhat similar code has recently been developed by tho American Conference cf m Govenutestal Industrial Hygienists. Threshold values established by those codes are aa foilerrs: *jj?. -Si< .St0 j I f s: ah. (The threshold values ere given on the nort page) 08 006 1160 5 Asbestos F-rmr. ri t * *** Total dust more tlicr 70% " " 10% dO/ to 70% s" to oo;i 5/ to top less than /-' CLAIMED 'RIVILEGED BY OCF Oarna-IMistia 2i, 19 2 Kaxiaua AUouablo Concentration (Particles psr cu.ft. of air) Sot* Jersey cods An. Cc.-f. Gov. Ir.g, Evr. - node 6 million 5 sillier 5-- _5 10 _ -- 20 20 60 50 SO SO review of the survey data discloses that ia certsia areas ( batch weighing rear) free silica comprised a large portion of the curl to which the workers vero esoosod; in ottor areas (asbestos tank arc carcor cabc::tos vre.s the principal component of tho nir-suspenaad sntsrial; and in still oiha? localities (ccr-tor aisle cad acbacto3 unfcagging ram) sv.hsisstinl amounts cf Lcbh free silica erd asbestos were present in the atuo3?horic dust* It is thu3 apparent that although the dust counts of tho sever iaminger samples wore ell below 10 tillieu, and thorefore rela tively lew, the rather high quarts or asbestos contort of the air-suspended mterial toadod to create in certain arose a condition which might be hazardous, or at least one which approached the ssxisus allowable limit eatabliahed by code. Specific examples would be the exposure to free silica in tho batch weighing room and to asbestos in the asbestos uabaggirg rooa. Also, the concentration of esbeetos dust iaside the boxcars probably exceeded safe limits. Although a dust count was not node during the survey v . e --m ao *ovu fc` ov -DO* 44iic oe s:!Ss *355-: Si~si! ?5iSxaA f C O.V au oc*oo eu -s* 6 08 006 1161 CLAIMED PRIVILEGED BY OCF Cnsr.p- ? l!i-u Key V., 1' for that sampling point, the weight of dust collected there with the vse cleaner device end filter piper indicates that the dust concentre.tie:: in aide the boxcar was possibly of the order of 0 million or core. Since scout cue-third of the dust me csbcrtcs, it sr.eus likely thev* & pw w jii wi hazardous conditics existed. Suggestions and F-eccmrsndaticg s 3. It is suggested that nininun. exhaust vsrtilntion rates which "111 provide effective dust collection for each branch of the cur; cDr.tro', cystrn be determined, unlesr this h<i nlrocdy bear dor.r, er.d tint the ruction of those breeches ba checked pcricdie&liy. Static pressure nosoursnssts can be used to ns&surc t.ir flow. 2. The 6xhsust system for tho asbestos unbaring rose should bs re designed eo thst the suction hsods rill be iccatoc class ts wh points where the dust is produced to ccilast it before it contaminates thr general air. It might he feasible to dump ths asbestos baps late a snail hopper end chute rather thin on to an epos platform. The hc;-~ :r could have a rotary feuding device for coving the asbestos cm -;o ;Lo riffle tables. The tables should be partly enclosed by pl&ssic ksois end should be exhausted. Housekeeping in the arer should be inprev?.;'. by periodically cleaning ths rocs of the accumulated dust. 3. Housekeeping praotices could be ieproved in a number of areas of the plant. At the router maohine the dust should bo re-roved from 'err. ttachine carriage regularly and t sufficient number of containers pro vided for the proper disposal of tho waste materiel. Gs tho miner balcony e&ro should be taken to evoic coilling dry dust and rhe arcs 7 08 006 CLAIMED PRIVILEGED BY OCE Orer*~Ilii.nji<s tty 9, MSI should la cleaned periodically. i. Special attention should bo siren to housekeeping in those trees There silica flour, tvipoli, diatooacaous earth and esbestoc tiro hanQu'd. It Tat noted during the surrey that Lags of those caterisls were stored in large piles throughout tho plant area There space vras available. Ssse cf the bags were broken and covered with duet. Dust arising fron this ccuree would tend to contaminate the atnosphere of the entire plant. 5. Jt is raaonrondsd tliot a ruction hood be installed in front of th? operator v.ho manually turns over the liaylo tiles on the conveyor belt, e. All anployoes woriring ct points There dust is croeted should ba educated in good dust suppression practices. As an added safeguard. it is eugssstod that those who work at dusty jobs be required to chanrn their r/orb clothing frequently. 7. Sines it appears tliat tlx: loading ben care are probably oirposed ta a hazardous concentration cf air-suspesded asbestos fibers, it is recar~ =3ncod that the aon wear U.S. Bureau of liines approved ruspirators curing that operation. It would be preferable, of course, to reduce the dust concentration by exhaust ventilation or some other practicable method if at all possible. 6. Dust ooisrt surveys should be made in the plant at regular monthly Intervals until a low level of dustiness in each potentielly-haserdous area is established. The surveys can then bo done less frequently. ' 08 006 1163 CLAIMED PRIVILEGED BY OCF Ot'zt: z ~ 11; oir Uzy 23, 12 c l 9. The maintenance of the working environment is a condition which oonfores to regulations promulgated by local health agencies cr which ia is accord T.lth accepted standards of good prccticc should not to cencidsr&d as a ccnplsoe protection for & worker freai acquiring & disease aa the result of his- occupation. It ir strongly recommended that at the Eaylo plant r. 'ssdical progras bo eaiutainod which would require a pra-es-pioynsnt c.-cindtcticc, including a roentgenogram of the chest, of all prospective employees end a routine chest resntgeno-gran of all regular workers at intervals of once each year. Such z progran should reveal these indiri.dur.lr. oho ere unfit fc-r cssloymaut 5n a dusty trade. Of cost importance, any case of disease which right develop in the regularly employee workers r.culd be fcmii. early, bofore it become a serious health pnblor to the ir.drrtLdv-al mu a liability to the management. 08 006 1164 9 Table 1 CLAIMED PRIVILEGED BY OCF Ornn-riJ l t.y 29. AJtALTSXS OF RAI7 MATERIALS USZD IK TEE KAEUFACTUPJS CF FAYLO Eatrrial Composition Site cf Particles Asosito Tlio bulk of tia material vas fibrous. rimy of the fibsrs two separated; they did cot possess the high decree of flexibility of chrysotile. Grains of cUorito cr serpentine ircro Eidhoring to s?c of tbs fibers. Tbs sample of the caosite brought back frer tho Eaylo plant had a quarts content ef ?1 per cost. ifost of the fibers rare ssvarej. hundred :J.cress to ccvaral cr;. ir. length; relatively far; rcrc shorter then 50 micross. iksry of there she: fibers Tfsre 1 Eicrea or ices in die. icetor er.d, unlike chrycobiic. Tore generally straight or criy sli^ht/y ourvod. About per cent si- the catorial (by roigkt) vould pees t'.:r a ICO nosh ecreeii; in tide errll-;: - thcs-lOC* sash fraction about cnr.-vlv of the fibers rerc longer thsr. 2'. sderons and for evei-y fiber there r about 6 particles. Chryschiic lloro then CD per cant fibrous chrycotiie. Adher ing to sera cf vhs fibers vorr grains cf ehrenite (?), carbonates, a fen grains of rrassivs serpentine and a lrace ef divine. About 0,5? quarts also traa present. The fibers rerc veil separated, I!?ry rerc several hundred sieve:!- long and some rerc several ir length., Abort 10 per cent of the material (by might) vrculd peso through a 1CD mask screen; in the smallcr-than-lCC noah fraction atcu ono-feurth of the individual fibers rare longs* then 22 ah crons sai ecr every fiber there rerc at cut 12 par der. Ir this n-action uaapscas bundle s rare cheat as numerous as t soyarated fibers. DictoaaceouE earth Principally natural diatoasceous earth vith u trace of quarts. Probably soao olsy^vere present. Diatoms rare the fresh rater vsrioty (t). Probably cere than 0 ir So per cent of the particles v.ere sisailer than 1 nicrcn. Quick line Ssarly all lisa, with 0k2f> quarts and treeos of carbon* atosj feldspar end glass. Eostly smaller than 2 x'.crura ar rarely larger than 10 micro ns. L'er. clumps larger than 30 microns rsrc seen. Silica flour Almost entirely puro, finely-ground quartz. Probably core than 95 ??r cent c the particloc vers scalier than S microns. Tripoli Almost entirely cryptocrystalline quarts. Probably mere than 95 per cant e the psririclcs rare smallor the.* i 08 008microns; only rsroly xrcr''- than 40 microns scar.. 'fable 2 CLAIMED PRIVILEGED BY OCF 11 :r ir* CCBCETXBATXOtf OF ATUOGPEERIC D5ST A? V/SIODS SA1PLI1 POIETS ID PL/rr All ewaplcs were taken with tho sidget iaplnger. The collecting fluid 'rtzr 85? ctkyl alcohol. Sards "1: Router wachiao. TrJrsn at 2:45 P.L;.; 10 idc. E&irpliaj, tine. Router riUiite cutting ILiylo blocks into pipe inrelation fr.i-ec. ? Oy.:: resetted exposure of Sr:.:o ecl ct router cr chine outlet reaariiig r l w i'_ lias feme nrd applying cloth coatings. L light glue was cprr.yd cl the ft .V.-; ih cc^prosssd air spray guns to mho the cloth cohere to tho Gcyl: XI.v -r-tiixg parts of tksr scasiiine nsro enclosed 'ey sheet metal housings rh; re.rc exhausted by c central auction aystos. Tho enhaust points were chac': by smoke tosts and were found to have stress eusticr. This sans ccvfcrd erhaust systen also served the vroct finishiag line, which was not oparc at the tia.o. Since tho eshsust points of the vrost lino were closed off t\ drapers, the volcae of ezhr.u:t ot the router icachire war. cubstmti;ii;ir.arcascd. The router unit vis located in the open pleat area. Bodsr&tel:; htavy t.:si.v3ula;ic.is of Kaylo du<-L :: Vw< ad tho uadsreerriago of the rr.ehi-2. 'Lh: c;srstors ciseerded brekee. pieces of insulation by throwing than inte esroerteinert, Several ccr>t?ia?r*F ere filled in n short tine end the recce: d.: rc arcs fell to the flocv. Souselrepeirg in the rrchine area -.mr rrl-- fa: L'uct concentration*, particles per cu. ft. of air 4.-1 rillica scalier than iC,i. (Pearly all o:7 :V particles appeared to bo Su, cr leas in ;.ca C.06 ailiior. larger than 10ji. (1C no Cje in lea rgi 8"o YS :4 o o9 lU |B -si . 9a E21 3&5" Sarnie fi': Coster aisle. Inker at 5:10 3 10 wryling tine. General air saspie along canter rirlc batvrssr. direct* lirca cri:r: eni i_:>. t:tor units. Tho units rrsrs of a eecplctsiy endorse corstruct!er. Only v slight volume of steas it: aoued escaping into the general air. Lcua:l:.':;.n.g wet good. Dust concentration: particles per cu. ft. of air 2.4 sallies snaller then 1Cp. (lost of `the par c ldc, ware S)i or less in length.) . 0.18 million larger then 1CU. (10 to 2Op. in length., Sarple $3: Batch swishing rooa. Tekea st 5:30 P.H.; 6 nin. ssspling tiias. Gonsral air tuple iz> batch r/oigbing room crea. ITo weighing ras bein*; done at time of taopliag vac doss to tho changing of shifts. Other ners&l activ ity cu going on. Housekeeping in the urea was in fair to good ordsr and the general antilation conditions were good. The draping points of the dust storage bins into tho weighing containers were each provided with exhaust z-/stcas. These exhaust points v/ero checked by ssske tacts and the suction u:.: found to be only fair. During cn inspection ends ecrlior ir tho dar visibreasousts of dust were scon t~ essape into the goserd room air fren the drayixg points duzing weighing. Dust concentration: particles per cu. ft. of air 8.4 xcillies scalier then lOp.. (test of the parcic :u were f+i or lees iu length.) 0.25 Billion larger than lop.. (Kesr lOp izt les;c.:.) OS 006 1166 CLAIMED PRIVILEGED BY OCF Table 2 (Continued) f Orcnr-Illinoi:'Cl If 21 Ssa)>lo #4: Asbestos unbasclcT. veon. Tatra at 4:0C P,U,; 8 nin.sampling time. Exposure ei' uorJaaon in asbestos uabsgginr room, A complete cycle of voi'i: was Coi'.e including cyaning a 20D lb. bay cf seaside long-fiber asbestos, flctp-ir.,: it ca q pluti'cn", feeding the riffle table cad feeding acbortas into *i.K hanas:* rill. The rocr. ?/cs eocplrtsly enclosed gad was eiAaustcc'. from no points in tha ceiling,, The door ran open to adait bags of asbestos cr.d actnhe air for rcatilsticn. A risible cloud cf dust in the air van present during too vssbagsiag cpr:'r.t5.on. liodsvstoly heavy accuaulatisns of fiber rari ur*5ftc*.: on the r*achine surfaces and anils throughout the roru. During tL:-.jabaygang operation t?.e operator, r.ho vaa stations:: in tho stress of sir coning into tho room, wore a filter-type respirator approved by tho U.S, Lurtav. of Iliac a. , Dust concentration: particles per cu ft. of air 6.2 million mailer than ICy. (Host of tho parti cles were Six or less in leryih.) 0.14 million larger than ICji. (Loir 10^ ia lon-tb.. ; banyfo v.5: Bart finfshiaft Hra, Taken at 4:15 5 ris. saagl-!:*; V:' 3::p-*3ure of~*w;*lmssa vhilr turning Ksylo structural tiler by : . C7i 0 . aenvsysr bolt located in tVo coster of tho finishing liac. All r.v; c.ccg'O tr_j. smoothing opsratiens rrrs enclosed and vere provide:: with exhaust:.. !fo :ju=nti*:ies of duct Tx-ro raised t/hen tho sen turned the tiles. The Li-,ini.in* line vac located in the open plant ore?., 2susekco:in; was goad. Dust concentration: particleo psr cu. ft. of tir 6.3 nillien smaller tha* ir.;j,. (VJIcst of tha parti cles wore 5p. or lsss in length.; 0.4S million large;* than ICy.. (fcoctly 13 to ISia length; one was 11in long.) Savils #5: Pre-hardsaor. Taken at 4:45 P.H.; 10 sin. car?iir~ tiro. Fre-hsraossr end tile pouring cncliino, B unit. General air zz[.-.y~.c of the urea in which throo sea operated the unit. A vet slurry of naylo r:.c poured into colds end then passed through a ocean cheat into the pro-htrdor.er. moderate amount of atoaa was in tho atmosphere around the machine. Duet eonevstratien: particle* per ou. ft. of air 2.2 million smaller than 10^. (L'ost of the parti* elos were less then y. in length.; 0.45 zxillion larger then IO4.. (Up to lEt in lenyt.;.; Semple 7t Miner balcony. Taken at 4:55 10 min. caroling time. Central air sample in west end end center cf the mining balcony, were doing their normal work. One mm added lime, silica and cement to c. miner unit from several portable esntaincra. All the mixer units wore oovered. Accuaulaticns of dust from spillago were present on all the. mixer units nd os parte cf the floor area. Dust concentration: particles por ou. ft. of air 6,2 million ssaller than 10*i. (>iost of the particles were less then Cv in length.) Q8 QOe 116? t fable S A2JL7SIS 07 SAiSLSS 07 ASin)SPZC3lC CDS? CLAIMED privileged by ocf O-crr-rilKey 2v. fespie nmbor 1A 2L SA 4A 8 61 7L v.uaris Llansirctou:; m .....i-V, per cent por cent per cent per cert per cent per csrt per zz. 5-10 3-5 tw* 1-5 d-v :y- WM.*/VUz 5-10 15 -2E * * a ~ C i* j.^ocite ^)o5 dO-EO zo-co 1/iJ (*T CLiciL-tc ., y.-ric * r* f C%r . \ J . * C' mf-/V*J> .- ? rV1*.- r' -n Zf--'" 2-3 e-. 0 P '`AM ia-20 a civic or.ioc ypscr.." L*.. 1 <5 LV. S-ll vLysiil: libtr - * " 1; yiikc ur.rscs 111:: their. it 5- 1C --.'0 2c- -5D 5-12 rr_ 3.-2 1-2 2-t vzur v; r*.^ s * - * M r* a , - -r i., . * firisr.cs prccuc:- --V*-- f -- L-Otrs: t2K?L* l-.. Seep!r ccrtnisi ? cocaiderable c iatcr::.cs:v; crj*tL. 2A. Fibers aiid cur;lee of c:;ositc up to several c:r.. Itr.;.. S/i# fcuch of the fnssite r^z bctr:eer 10 and 100 tdcrsv.s .'x lezr 4A, 7ho asssite cccurrod costly e.s 20 to ICC derer fibsr:; I bundlos of arc rite rare noted. Tho chrysotilo was prcrc-a; . . pcrt-elly oueasa bundles several hundred ricrcss lcn;v. 6A, The bulk of atriple $5 res oii unidsntified icecropic -arc-ricl vith. a low ir;dcn of refrection. Possibly it *..r.r zz.crzczs.sca or s. less porous forii of Eayio,. Hue:' of it cecurrcs rr. roaettc-liko resses. 6A, Tho bulk of the fibrous material appeared to consist; of *- costly 20 to IDO nicroij long; sets ~sre savtrel hunerc: lo&g. 08 o<o UtS 7/., She ocosite occurred as flexible fiber* 2J to l6c t:ic:-cac L. also as bundles several hundred aicruut to several :a... Ic. . . Fibers charter -ciiijz 20 riicrsns appeared less i'ls::i'rlc tile. It is doubtful 'Cav: iziz'c or try cl.y.:';_ vii ; y,z:csi this st-x^lc. ( w enter Tr.ble 4 DATA FOB SIMPLES OF ATMOSPHERIC DOS? Orear-Illir.sis IS, 1021 CLAIMED PRIVILEGED BY OCF TCelQht ol cuct CCl?.CCtCd Description (if BMfflic lvO Collected in rsnsrai weithlcR area fren 10:00 0:50 F.l!. (6.5 hr*. / os Jen. 31. 1351, tc 1 u ill llts h V) a srO vi am c ja uv roS5h SlTeS ti a - o o !iS Igfl23v *. c o * - i- 2.5 Collected at asbestos teak frosi 10:15 /..i-I. tc 0*30 (G.25 fcrs.) on feb," I, 1&5ST' o-` 0,,2 Csreral plant air ssaple collected fron 0:25 i-.lA tc 3: SO PTiil 17.1 hrs.) oa Feb. 2, 1951. Oft 2.4 Collected at flat shins liao fros 10*30 L.iu tc 4*50 ?,II. (6 hi t.) ca Fc'o."c, 19f>i. 2.J Collected at rcuter fron 9:03 L..1T., to S:C2 ?,b\ (6 hrr..' oa ra-c. e, 1951." U. 5,4 Collected in box car frea 8:50 A.!i,, to 12:0 ?.Lj (2..S hrs,) cq Feb. 12, 1951 eaa while loading true!: frez. L:CC C-.IL to 5*00 F.l!. (2 hrs.) oa Feb. Toj" 1.1 Collected is asbestos shredding rocn froa 1:00 1JWL\ t: 4:0O0 F.S. (5 hrs.) on JanTSO, 19Sit XOIE: The staples of atsospheric dust for analysis were eollooted on a paper filter with a t&ouuq cleaner. Ibe volu&e of air stapled was about 2400 cu. ft. par hour. 08 006 1169