Document K6rJddRXKdonw5GEL004V4Mar

r ;'$. ' ** s~. i''- >' A U. ft* Prtwtli ui tatlnatlan rf Artrtw m i OtMliMl t to tte rtluetl* Mi tf ufeMtN ul tho umUtUi tf.,tto riMrtli with lg <lNui It is tetcdai monw; te dorolpp Mtha&a for detecting tho prtiM of ndauAe aoouaAe of adbaatao IiitiIi lo tha prtuMi of lirgi mat* of ethnr aitvliUt Asbestos is * wh (Itm to mini lillwti >iamU mA **rM soly to diflM i fibrous form of tha adoaral, Dm to tho iMfM&M ohioh oolata aaoaapo&as tha praa&aa ootora tho hailft hutfl it II aaosldsred that nathods oust ba developed ahiah *111 allaa tha gpaddle . liaetltlas af tha nrloui oloarala to ba deteraioed aoi oat to roly oaloly ^ao tha Aataotloo of a flbroua ahape. Duo to tho oayatalllna ootaro af tho oloarala, sad ia general tha oloaral oaoaa oao bo oaoaHaraA to bo oryatallofTaphlo Aafloltlooa rf tho oloaral, it ia passible la priaolple to uaa tha eharaetariatio x-ray aoi alaotroo diffraotioo patterns to deterolao tha predae identity of a oloaral. farther If * apaotoao oao ba prosaeted io a aaltablo farm so that ao x-ray HffitoUa pottom oao ba abtaload it ia posaiblo by oaiairln tho iotaaaltloo Of tha 01 r -aoticn Maos to obtain nuaotltatlre oatiaatoa af tha rolottfh proper.*cos i/~ tho aryatallloa aiopanaota. Tha problao of collecting aod preparing apaotoaoa for analyaia lo iroatly dapllflod Mo 'he eootooioaot lo proaaot lo largo quantities - topwad ta othar noterials. bat booooaa axtrooaly Alffloolt rhea tho lovala of eootaolaatiaa oro loo compared with othar pollutants auoh as oouli ba fbuod is a aaroal artio ataosphars. Tha purpaaa of tho oark deaorlbed bora was ta iovsatlgata oathsia af eoIleating samples ant ta ebtalo a rough aatioata af tha aosoots if aabaatoa aootaoioaata Tho analysis taahalfaaa aro Halted far tha prana ta QuailtatIra x-ray pander pottaroa ead'sani qoaatltatieo" oloatrao dlffraettca aiaroooopy. t 1. Tha wbso atoooahoro. Sa^Ooa oaro collected by filtration of volooaa af air with *Seteriua" filters harlog o naajaal pore also of O.to. Air thrMigh a 25 bo filter by oaoaa af o ratary all fillet ra threat* a oator filial gaa oator attached ta tha & aaopliag point was ehaaao situated ao tho lt. ooroar af a about 500 yds P.I. of tha ada 7.IJI. faotary buildings. Tho ashling head u positioned about 30 ft. ahera ground laral aod raa fixed la a position approxinatoly aloe laehea ftra hi# wall. Tha filter head aaa hold with tha filtering face dawooarda aod protected by ao iovortad fUtor funnel. Ra aoaouat aaa token of weather conditions ay wind diroot*ana the ooroel pr--rolling *1*1 is aod tha nglM w-rw ioUmmi! orar a period la -later, CtU| tho eyatao daaeribad abort. It raa posaiblo to obtala aawpllng aotoa af 1 litre per oiorta until tho filtor baaaan bloated abaot 10,000 litre had baao pooaod. 0s4 poopo steer than o no poop, blockage af tha filtor acaurod after passing of ana ar hundred litres, particularly If tha air aa oat. . fUm 1 tin ilMtiw aionir*^ rf i typlesl grid im <bUa*l f^a a apaeliM after ptiud* V 1000 litre eir. 4 typlosi oouatlar result mac Tti te^NlU free 1000 litre deposited eete H filter U) an disaster taksa fret i\ aa dlaaeter HetM redoetlea ef 115 t 1 - b "fibres* ebeerrod/grld ( i.e. V x 115 *flbr*e"/l000 litre The f all definable as ohryeet11* er a#r ether asbestos fam ee set ell a# fibre* (in & itte diffract!** _ yitteni possibly tee te soroetlag by orgsal* astorlsl, *r the retell ef deootpesltloa le the stasspher* beaide* whioh the fibre* nay * here derived free b*ti. CtctUirsbli care he* beta tehee te reset# the pettibiUty ef dooeaposltlaa ef the epeeleeB le the electron sderooeop* by the effect of the eleetree bees. h*ty fibrous shapes eer* otsrr*d but only these dilah appeared te reseatbl* asbestos ooro oousted. The sis* of the fibres oboereed eat ef the order f i u 1( sad s fibril or too fibrils is tilth. Thtat It a 3001* eoatdalcg a aa for bdO "fibres* * iflT12^eu aetre Staples ef bear ter* erstlned by eeatrlfbginc uj eetpetdel a*t*rll etto eutea flits supported at ih* tarttl electron tlsreettpe * gride. Spisolasastere esatlted without ay ashing trestasat te rates* argaale sattrial, despite the disadvantages csteed by Ihle fere of apoelaai it was oaaslderod preferable do* te the uaeortalaty af the nature of the epeeiaaa and Its behawietr ehea heated. There ere .lao problaas ef handling the alaut* aetata af reeliae sal Am wprodlotable lewela *f eeatealaatlea whleh ooold eeeer aha e epeeiaaa le left eaqpeead to the ataaephire ef a laboratory e--lly handily " atbeatee adanrele. ?He aathet ehleh m finally adapted tee ee foliate tfter shaking the eaatalaar at least tee separate 15 si eaaplse eettrlfoged for eae hour la thbee ehleh ha prerletely besa ebaet te be free free eeataaiaetlen by eeatrifhglM dclcnlned tstar and enabling the realdte. The eeatrlfeged beer ne deeaeta fM lha residue itlot ess thss easha by reseapaadltg aat edatrlfurlag eueeeselwely with aeateae sal daloo&aad tmtar. The taaliad realdte tee finally resuepetded la a fee drops ef iiaiai as! transferred te e elosaed tapered eentrlfoc* tide it the bettea af telah tee placed ea uncontaalaated carton ce.lwd oleetra alertteope grid, carbon aid* apoeraest. r*riher esstrlfugln* deposited the residue eat* the grit teleh was that oxaOned la the aleotraa alerescope. Vith bsers thst eoct*lBcd larr* touats ef sedJaaat, Instead of csttrlfbglag all Ih* residue on* irrlds, th* residua was reatspaeded into 1 si of eater sad i drop (i/'O al) of the *lnt<on wan alloead to dxy onto the C dAetprf wpli ** ill tin** oonaidera' Is en aas taken to etslad* oontaalaatlea r.d sewaril blaaek raft-woe# spedesna eor* matted Is *11h the itnesphirlo p*' immt, counts wore sttwwatwd for 4 I IIIWMll to --to M<gr dlffMUM *MmUaH Mto Into I lv mi1 wd ir|irtMitol fur iMliilw hw* Ami wt alailar >nHwi MmIIm MA fw tkM l*rlli M Ar tto Mr Ml iMqhirlt Aaot iuplN. tMlwtta U it ilndm lniiili ula mmi Ato i mA nmIIn tat--Mm totoalq--. m AU tto Akw iwriliM MnrtA t--atitoti-- mt tlffimit If Ml UpirtlU. A MM fir aatoaattag tti ahry--tilt MM A Am* Am Mm m* Ml fA A to --tlof--tory AnA ArAw Art All to mom--rj to --to too toetoiqM a--tola m m MMrtto i -Z# ' \ S'! A* mill of Im* mo AM to a fm ilo of lol--1--I mtor mA MMoatol to ilrn toto to m Atn wrt floll tm AM 19 Mm. Aftor rwml fm too toto too mop--AM toot mo olloool to Mttto for fot Mm. o.g. mtil too mtor mo tlttQr rotoor toM llA. Z* mi umA too* oop ahryoatlls ooolA to tloporsM to too oltro ooml, Um ogl omritoo of mb sstostos mtorlol moll to tooto* lM( rt. lTTt*rn my flhroo --1--M to too ij o--rotoo. Tto ohrpsatllt Midi bo aoro itaU* la o--poaolm tom aoo* of too tooto llAi| Aao* tom olloBlac o largo port of tto ohryostlla to to mporotM opm M--Mag. It too tom foml toot to miag tolo mttol mu UfOMttM 11bm ooZI to UmUriM froa tot trial ooapoMlm ohm attoSag *M opporm* froa too orlpiad mtorftaX. X--trm olera--o-- Aiatittmi art pm--Tip laprtvol u o largo port of tto loot too tom riatvol allsalag Moor AumtliM of too ArjrtAili, X* it lop--toot to at*# toMk tto* tot tffott of tto altro otoM All to to totallp Mtor tot orlglaol portlolt Mm Alotrltottm m tot Mtoot tm --Ip to ap#UM to oarolooo for mot 4tttrMao*lm. la Ml tto taortl-- ottoaptol It too --Ip tom p--MMt to oMato wf mM--A totimto# of --marts of ootootoa oooa oa olootroa oAaroa--M - opoolAfao oM to p--oral too mtotl to llttlo tottar tom t lotootl-- : tootolftt. I# odor toraetify toio loo Ion--op tom iiwH of ohryotllli , *i>vo jom proporoA oa --tfhraaa flltoro toio alioaftag a oorito tf piotatw mu oomto to to thiol--I Alrt am to rolotot to oa prior of mml--it A to--a might of ftoolp AlrllM, hi# oarfooo arm ohryattllo mo atop--AM aoftag oltro atml to 1 lltrt tf loimtoM ootor. 100 d f tot mtpoao&m mt aolt ap to 1000 al, toM gtalag a Allot!oo of I,#:. *" rtptttoi trorol tftaat MU tot rtqtorM ao-- tf atopttlllo mt tototoM to 100 M partita. Aftor flltrotlm tf tot AlltlM parti oa tort^ a (9 m. m oloois-- t AtttotoA to 1. VMS tp Afhrlai IIIttM oilgotta it mt pttolhlt i ohl-- oaali to roUtoA *t t i flltor. AIM, to toaMag tto tm tf fll auo flgoroa --all *y --rrylag mt o alailar oaoroi-- otto opoclaooo to tolto tsrtoa hlook too tom MSoA, it lo topM *.*> to Alo to Aoooaatroto Am roll-- W-lt/ tf At aotooso oAoptoi for proporlag tpoelaoM fm oAoervotl-- frm Hplw --11--tM froa too otaooptoro. Ito# hy m aoo-- la toio --tool lAool tm fHOtttottn ootlmtiaM it it topM II MU to toptilo tf rlAai --mItgfol flgwoo mtil o amt OatfMt-- n--wait am to tokm.