Document rpvBkeD1DVzV4kmb8X5Ra4LZe

FILE NAME: Asbestos Cement Pipe and Sheet (ACPS) DATE: 1968 Maybe DOC#: ACPS071 DOCUMENT DESCRIPTION: Unpublished Report vV ' l< i>;\V' :S : v.-* tf v ' \ , y:\ ;>; . . ; I,;,',;', r^ Av ''*',^ *<* uuiuu uuiiuiit tho University of Looda Snfoty Conmittoo and ',,'' RV' other ooxmlttoeo havo been eenoidoring the-oxtent to whieh nubostos ,',' ,.;.' "' ', should continuo to bo uood In buildings. in' tho lig h t' ef;>he'`ln6reflei8\1.:V.5:'Xl- `V awaronooo of tho dnngors of th is m aterial .to health, - , , ;<r4'. * ' - v.r.i *v v.>(' "*V * ' *'r' ' ' Tho following facto havo boon cxtrnctod by Professor Prooton, F.R.S., from modern aoiontific lite ra tu re on tho oabjoot. 1, Inhnlntlon of aobostos dust can causo lung cancor and othor disorders of tho lungs and stomach, Rccogniood ecsos of cuvoro anbootonin aro said by medical non to bo confinod to workors with nsbooto.i! on tho othor hand, tho delay botwoon inhalation' oiid tho dovolopmont of symptoms is usually long (of tha order of 20 yoars) and tho connection oould bo overlooked in easeo whoro attontion is not opocifioally .drawn to i t , 2. Onoo osbestos dust is inhalod into the lungs, tho body has no way ' of removing i t , Even a b rio f exposure is known to havo eausod cancor, 3 Aobeotos dust In lung tissu e may bo oither (i) coatod with a fibrous shoath, forming tho so-callad nsbostos body ( i i ) lo ft unooatod. I t io not known whothor the ilbrouo sheath is protective or whothor tho fibrous bodioa thomsolves causo tha ailmontai or indeed whethor some othor contaminant to oobootos (o.g. o il) , io' tho c u lp rit. 'I \ **, f,"*i Wi', i '1 nr t v - . , . ,1 /" Jf f*.vy,Vv ', ^ rt'"' y. y '' ,i i .K "mw!. ,'i y < 1 `JfHi ** Aobontoo dust ranges in aiso from particlo s visible only in tho olootron microscopo to thoso vislblo in tho lig h t microscope, Tho ovidcnco is that a l l partiolos cause osbestos bodies. 5. So called "safe lim its" aro being rovioed, for i t io now generally accoptod by informed a u th o ritie s.th at there is no "snfo lim it1!, "Since cases of aebestosis and nooplnsia associated with asbestos ' havo beon rooordod following tho minimal exposure of.community environm ent"..,,(Dr. Scholl of tho U.S, occupational hoalth progrnmmo.) . . , , 6. I t seems th at once asbestos dust has contaminated a room the .room cannot be made safo again. The rolovant obsorvntior.o are made by Dy,' Bolt (Univorsity ,of .Reading) using guinoa pigs (those are. y y - highly susceptiblo. to aabostoo) j guinoa pigs in .a rooa exposod to 1 asbostos dusty clermod 'thoroughly .and ropaintod .s ti l l acquirod ,, asbestos'bodies' in, their, lungs1; v; He".concludes 'that minimum ' , . - exposure 'is ^dangerous.^! ' y V . 1 ' ' v;: if '- lysyn'r-': "x"" ' - !-. 'V-'iV^V i'Y,y'-"fy/ f A - 1 '*' i' . o,; "Jl i`sJ ! 7. Oh oxpoaurd moroly to community environment,. Or.'Thomson . . . (Department'of Pathology ^U niversity; of Capo Town), roports on, . " 300'oonsocutive autopoiofl 'ln each of Cape Tovm 'and'JUani. He ' roportrJC tf.of the1cadavers,,had/asbostoi bodioi in tho. lungs. , Be conoludis'Hi,,paper'.by'roiaarks5'on/iheir.ar,ifold:usss?ofA'i;>.''- . iaoboobtooss;wua*toa','wwVhiere' .o^llttsrnhifictitvlovo/s,f^lra4r';a:s/vificilvabalitlia'fbirliidi1'w.'ahenrde;',w,: 'her'., .'.ssboatM , . unwise/ftn4 'potentially, 4 i g o m i;^ , ,,r ,, bitumTMeen,n,used - , />v'/. " s`r4 ysiy^i'Axw[yitt iy.ty ;"'>:' . < ki&kwmt ^Mi* `i,t r ''A1'. *Z!rvt' si'>* Y**''k'A^i 'kmxc -srvti^** `Wi `*'*V 1/`Vv' t-'-^ i mV I "r'/v t-Z< .' .-;7.'7 . The dangoro o _ ___ _____ _ artlolo in Ukj Cu-vdion of .n2>1.C<S^whicn aloo^ft'iaino ;`tho;;1 foUovittc V w t Q W . - v - --y:h,Wsi-; ' "Tho current isauo of the modieal journal ,'.'Tho Lnngoi" roporta the death of u hw o f ^ from,the eolnoidont "(Ji . development of osbostools end en associated'form .of,./''',:^ 't ^ ;',.,,,v. '..! cancor, His only exposuro to osbootosyduot had occurred; ''A:.'(I ,T thirty yoars ago when ho worked for. six months as ft' ' crindor in an uobeotos fhclery'| - , ' , v' '.' ''. ''Foots exprooaed by doekors handling asboaton have boon allayed by an aaournneo that malignancy cannot roault unless exposure has boon heavy enough to eauso aaboatosia, Thin in a dangerous assumption, no lingor supported by informed medical opinion. ;; ' ' ' ' "It in a ll too obvious that tho uncontrolled tipping of asbestos wnoto, lilco that which took piaoo 'in Buxworth, in Derbyshire, prosento a soriouo Imnrd which nooda to b# , eupprossod by a ll posoiblo moans including proper legislation.' There is no longer any question of "safo" exposure to asbestos, but thero is an urgent neod of now . rigorously .controlled method .of handling or.d packaging," ' . , , , I t books lik ely that there is ,,lrondy a danger on the roads .from dust produced by the weaving of asbeotos brake linings.. Thoro are sovoral common ways of using asbestos in modorn building and tho University of Loods has decided! (a) That tho uso of untreated asbeotos and croeidolito in any form b" bannod in n il now University buildings, (o.g. in tho form of oprayod oobestos ceilings or insulation to hooting pipes.) (b) That asbostos cement should not bo usod for air inlet louvros,(whoro dust abrasion would roloase fibres which . would thon bo drawn into tho building) nor for panols . liable to bo abradod.or rubbod, or frequently romovod for maintenance purposes, ( ( o) ... That whero no1suitablo substitute could bo found, and 1 - . . , ..aebostos oomant panols must bo usod,; then tho following, , . i " ; i ' p r o o a u t i o n s i must bo .oboorvedif.''i"'"''''./'m . , , - 'V- 1 , . ;; , .0 , V.., -.. ,,.v' t'f' VThat' *11 asbostos cement:panels 'ja slW /e u i' to " ' , ' 4eva 11a<4' *tSi4 iAnVs4' An A4 AS' Aft4 ' SIT',' " '' lJ w flWJ " 'At rV !^ 1,"1A,1 ..SdF#f'-V*'. ' i'-':`'&y'r'A *>1? '>I-*; ? r * a.' *i' e . ^ . ............... 4-*.i . - liaijMi wJiiVdV',Z1,)T 'f A ' : ^ t............ - t g p ism e ia e B m 3 a s s a s w i,i ... t f if it il f uv'-SW fe ll , , . W ' v h-'i'tvl *i!' /.>,-i w,f|l f t p l tI. i\fj.'i'*.'j>if;; S i * * , , '^ i i Vj, .,., ( ' V I''; '. i.*/ 1*. .*S 59^1 ^ 4';*VjPi u , `V-; f f ,, ' ' '-1'.'<j .- / \ '<h V'', '' Puoh itonourco mi thaoo^aro,costly, wul n l o t ' w ill depond'.(ft),upon ............. tha extent? to which hoboftlos.'comant manufftbturerb'fiU.bo propnrcdto'- fnoo tho oxtrn eoat of ooalinc^imrt ;'(b);iiibh','the':o'omporntivo coats of. >', .. .v. >' imprognfttine alternative m to rH ln ouch fts:h*rdboard acalnnt f ire . . .- ,.. i; i I n i t i a l enquiries hnvo civen tho following compnrfttivo con t e l ......... ' ' i. to m MatoMnl Anbootoa Coraont Hnrdboerd (top quality) Stool Stool Finish untrootod . Trotol omuleion , eioxo J" . , i" untrootod i - . 4" Pyrolith-improohatod to Class I otondnrd (very low flame eproad Guaranteed for 25 ' yoars) . . " untreated , swg , " / 16 owe Oalvnniced ' Vi aw(5 " , 16 swg lEPJiWiPA ?< ltj 28.5 dB 1? V *n ` , cl > 28.5 dB 22 pot ' 21* dB 7 per 1.8 lbs 5 .1? 1\)S 2.7 lbs 3.* lbs 2.7 lbs 25 dB 12 per vr , 28 dB 23 pc: 27 dB 18 per 28 dB 28 poi' 27 dB 22 pci Diocusoiono at Loodn havo nrouaod a good doal of controversy and tho moaauros cot out on tho previous page eocm olnbor&to in rolatlon to tho casual v/ny in whioh raw asbostoo in used in soma dopartmonts. Cut i t doos soon that our prosont pruolicos nro dangerous, and ft roviow of tho wholo situ atio n throughout tho University is taking plaoo., Tho purpose of this noto is to sot out suoh fnots cm wo hare boon able to ooUwet In anno they are of intoroot to-others , - . --./ ' ` 1 '.I.Js'm M ',* ; ' /'I ' <'I''' '* . 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