Document emr5XqDZE0jdVoVBBx025Y3Je

FILE NAME: Sprayed Asbestos (SPRA) DATE: 1970 DOC#: SPRA027 DOCUMENT DESCRIPTION: Trade Journal Article - Spray Fireproofing Faces Controls or Ban as Research Links Asbestos to Cancer TECHNOLOGY Spray fireproofing faces controls or ban as research links asbestos to cancer J lie snow .stopped falling last May in New y o r k City. Residents iad long been accustomed to walking near construction sites in any time ol year and seeing what looked like snowflakes fall down on and beside them Few of them were awaie that die snow was actually asbestos fallout from Mna) insulation operations ai>'e. And had they known, lew filnils, such' as are contained in some insulation materials. 1 lie known vai ieties of asbestos u n h i d e two t)pcs and six cariat'ons, plus local cluuacteristics of specific mines, most of which are 111 Ca na da an d tile So\i et Un i o n A b o u t 93 per cent ol the asbestos !`scd m tllc U 's is c h n sotile as bestos, mined from serpentine Jugs, it also is contained in h se, rugs, safety clothing .,, u o n i n g board cosers. Last /}(') hapi, least, asbestos is used , spray fireproofing of structm steel Accoidmg to Johns-Mam i Dorp . the n a t i o n 's hugest bestos producer, only a fraction asbestos (1 per cent of then on i would base cared. Asbestos and construction base long been syn- i b e most r e ma i ka bl e thing a b o u t asbestos is its sirtual i n goes into spray fireproofing 1 1 ' (," ly supplies asbestos to sin on)mous. ; destructibility. 'I he tiny fibers are manufacturers, but does n 1 lien all asbestos spl aying was impervious to weather, heat and manufac tut e a spray product) naked b\ ordei of the city's Lnlire. I hey have the tensile 1 he company, howevei 3 Mi onme nt a l Protection Admini- stiengt h ol p i a n o wiic, unusual ! >ng been i mol ved in icsem stratjon And the word went out flexibility and they adsorb and fil mt o tlu` problems asociated an to an ama / c d public a b o u t what ter well. They aie also the onlv asbestos exposui e In 1928, alum medical researchers and an in nuiieial fiber that can be woven fix' \aine lime Bntish .scicni, creasingly aware asbestos industry into textiles. identified asbestos as an ocuip bad known loi years . ' ' be sliciigtli ol asbestos is also Lxmai health hazard for text, Human exposuie to asbestos can kill. US danger, In.siclc the h u m a n lung woikers, J-M staited animal i the fibers are as indestructible as s<aich on the effects of ashen Death comes slowly Often it is in n a t u i c <1'M. I he toi k Jusion was t l w m Ml or 30 ) ears alt er significant i n 1 he eai best esi dence ol asbes halat ion produced fibrosis of th halation ol the tiny asbestos libels tos was i ou n d in the archaeologi lungs. A J-M 5tuciy co-spomou, fi> the Met ropoli tan Life limn that, often invisibly, pollute the a i r o l asbestos mines, manuf act ur cal digs of a civilization in F i n a n r e C o , m association wii! ing plants, construction sites and land 43 centuries ago. Here, the M c G i l l U n i v e r s i t y M e d b . i demolition projects. Some, of ancients used asbestos to hold pot Sdiool, followed in 1929, concji course, goes into the a mb i en t air tery together before it was baked. b a t i n g on the occupational 1m ol the surrounding areas. How And, according to legend, Charle arils of asbestos dust In 1935 die n i n t h of tins is dangerous is not magne cleaned his asbestos table publ i shed studies showing th, >et deter mi ned. cloth by throwing it int o the fire. 1 he Greeks and Romans, how- an borne asbestos produced pu: mu n a i y fibrosis in humans a a! Kut the causes ol death amon pci.sons exposed to quantities of c'\ei, noted that working with recommending control measur- asbestos on the job are known. Of asbestos could cause lung illness. u g u l a i physical examination- asbestos workers who die in the M o d e m knowledge of the m a <uid more lcsearch New Voik City area, one of five dies ol lung cancer. Almost half terial dates back to 1879, when the first commercial mine opened I ochn, millions of dollars aim many studies later, the compam of them die with other forms of 111 Quebec, pr oduci ng 300 tons the first year By 1910 produc t i on is si ill heavily involved in medic, research, with about SI 3 millu,, cancel. It is estimated that a man who smokes and works with as had increased ten times and it has " 0I th of research now in progie-s bestos increases his risk of incur- been increasing ever since, to the I bi s includes co-sponsorslim n n g lung cancer 92 times over piesent 5 million-ton output. x'n i the Int ernat iona] Assou.i that of a ma n who docs neither. The U.S. is first non ol [feat and Frost Insulatoi- 1 be chances that a man will die of cancer, howeser, depends on Ins surviving Asbestoses, the first disease diagnosed as the lesult ol asbestos filler buil dup in the lungs. Asbestosis results in such bhrosts (scarring) of lung tissue that the victim is effectively strangled by his inability to get sufficient oxygen. Asbestosis also leaves a person prone to infec tious pulmonary disease. A magic mineral Asbestos, which comes from a Gieek word meaning inexting uishable, is used to describe a family of hydrated silicate mi ner als that h,i\e one common p r o p erty t h e y can be; separated ill LO soft, silky fibers. I he fibers are incredibl y--and microscopically--small. O n e mi l lion asbestos fibers is equivalent to only 630 hairs, or 3.800 glass I he U n i t e d States is the largest single user of asbestos, consuming almost one quarter of the world supply. I he U S. is also the most u e a t n e user, taking the "mineral of 1,000 uses," as asbestos h a d teen called, and finding over 3,000 industrial applications. Over 7a per cent of asailalde asbestos goes to the world-wide construction mdustiy, with the asbestos-cemeiu industry followed fiy the asbestos floor tile m a n u facturers, the biggest markets Ac cording to the U.S. D e p a r t m e n t of Gommerce, asbestos is used in shingles and clapboard, siding, loofs, interior and extcrioi wall sheeting, pipe, conduits, ducts an d acoustical celling panels. Asicstos is also in paints, sealants, caulking, potter's day, millboard and plastic reinforcement and filler. As a friction material, it is 1,1 brakelinings a n d clutch fac- <md Asbestos Workers, of a p n gi am called the Insulation h, flus-n Hygiene Research Pm gram. Since the program was m a ugur a t e d in 1968, with 5362,5611 1,1 ' a x k i n g from its sponsors, a ms tesulted m new- indust] saiery standards and equipmen The director of this and othc: asbestos research programs is I), I ' i n g J. Selikoff, a pioneer m th, field Vs h e a d ol the Dixision ,,l L i n n o n n i e n t a l Medicine of tie Hit) University's Mt Sinai School ol Medicine, and director of a. Lin ironment al Sciences Laboia jorv, Dr Selikoff laid been woth ln,g with the Insulation Umoi since 1962, when they agreed tc m a G the ixcorcls on their mem bership .-nailable for study Dr Selikoff became i m oh ed in asbestos research in the 1950s, when lie was head of a New Jersc \ clinic and had occasion to exam me 1, men r e f en e d to him with chest diseases...-Ml had worked in a ^oca^ asbestos factory, which has , since closed, a n d all were able bodied at the time. But by 196], six were dead, and with time, the test h a \ e eit her died or been dis abled by Asbcslosis or cancer. When he appioached the union for study, the leadens were all too willing to cooperate. T h e y had been tiying to make their p r o b lems known for years. W h a t Selikoff discosered spelled out their difficulties in very clear terms. Joi ned by two ot her doctors, E. Cuyler H a m m o n d , of the Ame r i can Cancer Society, a n d Jacob Cliurg, chief pathologist of the , Barnett Memor i al Hospital, Dr. Selikoff studied the case histories of the 632 uni on members who were on the uni on roles in 1942. They calculated there should base been 203 deaths by 1962, but discovered instead there had been 255, an excess of 20 pe r cent. A study of 370 u n i o n members con ducted in 1967 had similar results. There were 94 deaths, instead of an estimated 47 among a com parable sampling of the general population The n u mb e r ol deaths was not ihe only a l ar mi ng finding, but also the causes. N o ne in the genral popul a t ion woul d have died of Asbestosis, but ma n ) of the as bestos workers did. 1 here was 1Iso an extremely high incidence of cancer among the workers, especially of lung cancer. (No one died of lung cancer who was not also a smoker, h ut that is little ionsolation. Dr. Selikoff estimates dm 75 per cent of the adul t male population smokes.) sometimes, misinformation), the city took a stand against asbestos in the ah. Worki ng with Dr. Seli koff and representatives from i n dustry, the unions and other ad visors, the EPA Department of Ait Resouices issued rcgul at mons for spra)ing in the cit\, based latgely on proceduies proposed by the Sprayed Mineral Fiber M a n u i a a u r e i s Assot iation. I o those who protested the city had overstepped its bounds, of ficials icplied that air pollution in the city was Us p r o p e r concern and that asbestos, which goes from the construction site into the ambient ail, was a dangerous poll utant . I h e city's mayor has introduced a Comprehensive Air Pollution Control Code to the city council that would ban all asbestos spraying permanently. (At press time, P h i l ad e l p h i a's Board ol Heal t h issued regul a tions--p e n d i n g legal review and heari ngs--that woul d pr ohi bit all asbestos spraying and limit con centrations of airborne asbestos.) Whethei or not a complete ban is necessary loi publi c safety is highly disputable. But, since no one knows the limits of hu ma n tolerance for asbestos fillers in the lungs, the city has decided to err on the side ol salety. Until the ban, however, the word is control. New Yoik regulations (which may be aclopLed m similar form by othei .cities follow in brief: 1. Befoie spiaying, the floor must he cleaned of dirt and ob jects and then covered with a plastic tarpaulin. 2. 1 he entire work floor must he enclosed with tarpaulins that NewYork acts Research reports from scientists 'licit as Dr. Selikoff seemingly had little impact on the publi c or 'overnment unt i l recently. But then the news broke. Conferences, speeches, indus trial programs such as Johns.Uanville had sponsored a n d the unions finally caught the attenton of officials. New York City's new E m i r o n m e n t a l Piot ecti on Administration, deeply concerned diout the decli ning quali ty of Vew York City air, became Tinned at the visible emissions of hbestos fibers from city construcdon sites, the so-called snowflake tect. Soon they were checking lie city for asbestos levels, f ol l ow ing u p any reports by citizens dio had seen asbestos fallout After a series of meetings and carings, which also att ract ed a .ood deal of publ i c a t t ent i on (if, will pr e ve nt the visible escape ol asbestos fibers into the city air. Interior open areas must also be enclosed 3 Wc-t asbestos materials must be swept up and placed in a covered container immediately, ready for transport to an ap proved disposal area. 4. Floors must be va c uume d clean shoitly after drying a n d nia- teiial enclosing the area must also be vacuumed, with wi ndow sills cleaned, etc. before dismantling the enclosures. , 5. Aieas where asbestos supply bags aie opened must be enclosed. 6. Signs must be posted outside enclosed areas warning people not to enter wuhout protection 7. All persons spiaying must be furnished with approved respira tors and coveialls, which must be left on site. 8 Any plenum or other asbes tos-lined st uict iue i nt e nde d foi ORUM--D EC E M B E R --1970 air circulation in a building must seala and the Woild Trade Cen Di. Selikoll cautions, howeser, in .111 asbestos fat tory 14 years e, 1 be cleaned ol all debris a n d waste ter is using a non-asbestos spiav that, " We d o n 't know whe t he r or lic-i ' insulation, t hen coated with a fircpioofmg manu f a c t u r e d by the noL the new Calco is leally sale. Not until 1921 was an mid 1 sealant. U.S. Mi neral Products Co., of Wi t h such materials, many scars p u l e d deat h b\ asbestos record' Implementation Stanhope, N.J. T h e decision cost the T i a d e ate u 1nails needed lo d c t e i mi n e health ellccis. It is thci elore wise in a medical journal An autophad ie\caled "unions bochu Shortly al t er New York issued Ce n t e r a b o u t 10 pci c e n l i n o i e foi to wink with it in a sale, a p in die lungs ol a woman who li r an int eri m version ol its asbestos the r.iw material than the asbes plets ed m a n n a . died alt er 13 yeais m an asbcMo- spray regulations, it found con tractors still in \iolation and soon tos tension, with the pmj ect re qui r i ng a total ol a b o u t 5,000 More than foresight textile Lie toi y. I he "bodies" wc r diagnosed as asbestos. it eflectively called a halt to all tons ol the c ombi ne d materials. The switch to a non asbestos In 1928, ,1 study ie\ealed d .1 asbestos spraying in the city. "We ( I he manulac turer claims this piocliul is mot e than a tiilnite to 25 per cent of 203 asbestos w-od cannot c ont i nue fireproofing tall cost dillctential no longei exists, the Pott Atitlioiits's c m iron- a s had pulmonary fibrosis, vie steel buildings as in the iccent that the two materials now cost ment al loiesight. It is also testi incidence m eliiect proportion m past If we c a n n o t do it sal el y, the same since the asbestos price mony to the a u t o n o my of Poi t exposuie. I lie aterage a mor construction mi ght h a \ e to halt. has l i s c n ) The' geneial con- Anrhoii ts opei at i ons in the tity wmkers w 1ih 20 or more years' c\ But it can be done salely and tiae tor, for w horn a subconlrae tor as a In state e mpowered agency posuie was o\ ci 80 per cent. this is why it is doubly wrong to pci loi ms the spray job, using Calco 1) C / f does not yet ba se I 11 1931, Par l iament classifim permi t hazardous conditions to mcinbcis ol the Plasteiers and the lull upprosal ol the ci t s 's De As jestosis a compensatory disc .hi c o n t i nu e , " says city ackisor Dr. Ce me n t Masons Union, is Tisli- p a r t me n t ol buildings It lias ap- winch made autopsy mandate 1 Selikoir He also leels that any liian Management Coip. A piosal only lor columns and not and thus aided medical rescan 1 regulations allotting the use of spokesman declined (o c omme nt set lor decks, p e ndi ng f m mu l a ( I b i s is an ach .image U.S u asbestos in a m lorm must be i n on eit her the price oi delay of the an.tlvsis. scale lici s do not liase.) d us t r y w i d e so that \i olat ors will swiuli. In but, except loi the Port \u- New regulations and the mt n not hate a competitive ach.tn- I he new material is called thoiily, which is e x e mp t fi om the d m lion ol antibiotics, whit' tage. C a b o Blaze-Shield T y p e D C / E cits code authority, no builder in minimized infectious lung c r The i n t e r i m regulations were (the project had been using an Nesv 4 0 1 k has any choice b u t to earn, appaieutly improved tie issued April 13. By May 15, the asbestos c o u n t e r p a i t by the same spiay svitli asbestos or close down situation. But it was then disco' city h ad lollowed u p with 34 s u m company called Calco D) . Ac- construction. (Says one pri sate c u d that those who surviyed \ monses, f ne to contractors in a p coichng to the manul ac turer, it is builder: " Not esen the cits file- besiosis were dying ol cancer, flu p ar e n t violation of all the p r e tlie onl) commercially available men ba se lo answer a call to the fiht le p o r t of an asbestos link 0 cisions of the iemulations, which cbrec t-to-steel spiay fireproofing Trade Center, hut they do or the cancer was publi shed in 1935. lai were then less st ringent than the that ' is asbestos-free I he co n whole city could b urn c l o w n ") there was little stii until 1910 final torsion nate Lois aie cont i nui ng to adhei e There is no substitute material when a study cosei mg 1921 to In addition, the city issued to cit\ asbestos sprat regulations set that has full cits approsal. 1910 resealed that 13 per cent cd three show-cause orders to seal e\ en though they ate using the O t h e r materials than Cafco are asbestos-caused deaths were 01 asbestos spraying e q u ip m e n t on non-asbestos product because its coming .dong, howeser. I he city 1 anc e i . (A similar sampling in ilr three sites where asbestos emis long-leim efiects are not known. is already testing a product d e general public would have had sions in the air were still visible, Rat Monti, c o i i s l i uclion liian- veloped by the Spiay-On Re 1 pet cent incidence.) according to the D e p a i u n c u t ol agei on the pio| ecl, says the Port search Coip., of Ft. Eaudeidal e, By the late 1950s, other distui l> Air Resources, despite piecau- Uilhoi it y decided to " switch and a n d is awaiting lab test lesults mg health problems weie at tions taken. I ncl uded was the be do n e with it" when it became Ab o u t six ot he r manufacturers, tribut ed to asbestos, inducin'!: 8600 million W o r l d T r a d e C e n clear that asbestos would be a con incl uding Johns-Mai n ille a n d the mesothelioma, 01 cancel of h ter, u n d e r const ructi on m lower ti nuing concern But, lie says, the Giace C o , are d e s e l op mg n o n chest m e m b r a n e 01 the abdo 111 Ma nhat t an by the Port Authority new material has prosed a good asbestos spray fireproofing for nal lining, usually a rare form of New York. It a n d a n o t h e r ol a l t e r n a t e e. "Besides being free strut tin al steel But none of these Despite these and many ot n 1 the three served voluntarily shut of asbestos, the new material has is past the d e s e l o p m e n t stage. studies confirming the dangen ol down spray operat ions by April a betler K factor (for thermal C a b o 's progress was aided by the material, the United King 23 a n d agreed to seek substitute concluctn its) , it stays u p better the Port Authority decision to use d o m did not legul ate the building materials. T h e third refused to and goes on more easily than the it, which me a n t accelerating a lot trades until last year Regulation g n e written notice ol luture plans original spray with asbestos." of the a p p r o s al and test proce then siituallv eliminated use ol to spray and this led to a hearing V salety inspector on the job d u r e s , B u t t h e m a n u f a c t u r e r the spray and builders turned 1. on the sealing order. confirms M o n t i 's satisfaction, n o t also points out that the pro d u c t block insulation The regiilatn.h T oday, asbestos, spraying has ing that ot he r trades will now was clc\eloped o \ e r the past two foi spiaying include a written ap resumed on 25 city construction woik closer to spraying operations veais a n d is already being used on plication gising 28 days notice sites and, according to the EPA, than before, that there seems to "40 or 50" sites outside Ne w York. an d safety procedures siinil.u to all are m compliance with the city regulations. T h e contractors be less waste an d that the floors seem less slippery. Calco D C/17 also lias been rated by the Underwr i t ers Laborat ory the New Yoik guidelines The real i mport ance of tin have had to learn to adjust to 1 lie lab tests at Mt Sinai bv an d will be listed for eighteen spiay asbestos probl em may be as the extra time a n d money re Dr Wi l l i am [ Nicholson indicate deck a n d beam applications, fisc .1 test case of how society nnm quired. Explai ns a spokesman for that Calco 1) C / E is primarily c olumn a n d wall systems, and learn to lice with a potemit lh Diesel Constr ucti on Co., which is mi neral wool, or e x t r u d e d glass, three roof constructions More serious e n \ l r o n m e n t a l hn/aid >\ spraying asbestos on two city sites: with fibers averaging lour to fi\e ratings are expected to follow lc li ning to control it. T he asms "In these days of ecology, t h e r e 's no choice. T h e Department of Air microns in di a me t e r Calc ulations suggested that 75 pei cent ol the Precedents tos an d other such problem', nin be solved unth jnesenl ted. 10I Resources has the toughest pe o fibeis would be classified as n o n \ c t i on in the U.S. about as ovy. But a part nershi p of scion c ple in the world. You do it their respirable \lso, because the fi bestos h a d long precedent in industry and government is re way or stop " bers are larger and h e a d e r than Britain, wheic, in 1900, a ma n q m i e d .Scientists must define tin O n one site, asbestos spraying asbestos, the Mt Sinai t e p o r t to was diagnosed as h a t i n g died of piobl em, industry and laboi clr has not resumed. T h e old asbes the 1'rade C e n t e r says that they asbestos-caused lung scarring at \ i l o p solutions, and governmcni tos spray areas have been covered aie unlikely to le ma i n suspended the age ol 33 He had been the ensure that regulation is uml.it with unmi st akabl e green plastic in the air as long. sole sur vitoi of a crew working C'l.ll --MARGUl Ri l l \ IU 1 (CO 52 d ! r a i6 3 S L ; v ] _ ^ iV;j ; j . '.j CM , .. : S p o c l f i c a i b s i s t a m m / -:/i S'. S: Movy Y o r k . The hazards of air and water poll''tion are slowly heirs!-, ieeognLx.rf as more statistical information on tK A effect on the human environment Si coming to the attention of a cc-icerned citizenry. Since the pub lication of Silent Spring, he Rachel Carson, people have begun to ques tion the dangerous side effects that result from chemical pesticides, au tomobile fumes, and raw sewage dumped into our streamy and rivers. Industrial arid human wastes, care lessly or innocently disposed of into the atmosphere or into rivers, have an effect on nature's biological bal ance that governs the production of oxygen and the growth of marim. and animal life. In addition, as archi tects, we should decry the despolia tion of our environment resulting from the accumulation of physical mounds of garbage, junked cars, and industrial waste products. We should also take a closer look at our construction practices to deter mine whether we are a party to this pollution as a by-product of our de signs, and whether v/e can reduce or eliminate some of our own contribu tions to this problem area. Certainly in demolition of existing structures in urban centers, we should restrict the amount of dust that develops. In some European cities, barriers consisting of plastic envelopes are utilized around demol \ ition sites to confine the dust result ing from these operations. Perhaps our Building Departments and our Air Pollution Control Departments should institute stricter controls over such procedures. A more striking example of how architects can reduce pollution that actually contributes to fatalities is in the selection of net tain aprayed-on fire proofing and insulating products. in 1900, a London physician, in perform lug an autopsy upon the body ul an - r t : 'os-l erli!- ' 'o;h-::r not only me oconls who actus" v 1 found ucbciuo.; parl icl -n .he l u a a s viL . a: iy. ,L s exposin'' Ijc-m -"iv. - an d a U r i b u b . d D is d - ib lo She .Isij.-i,b,: is mid ca-ic.r, butjMio : ` ,voi k e r '.i occupation. ;hc-> i;,l iso sin '.i tuiui-ifoen in tin- baiiibn" - lated insia.'icas occurred subsequently ruwelieu in lustiy, closely ;|,,v!o i.i>; where an examination of ins lung with this w >rk,_r.ro subjected.ta Ml:, lisu<i of deceased aso'-stos workers! exoosuie M:earn litters jdaepru-i indicated the presence of asbestos. In cainc-btM'K. aconstkMlMi't2'}''Tf'i,,.|,'f 1924 an English physician, Dr. sons, struts ural stuel_ erectors, j of. Cooke, after an extensive autopsy others employed AT JMMltMyiM1 At and subsequent search 01 menieal lit sproy-asbes,os hisid^jonjn the i;i erature. concluded that the death of a of this contamination, and who is patient resulted sole'y from the in Halo those" sin-stns parijclcs. : 10 ox halation of asbestos fib-era and as posing ther,'Reives and are likely ,on signed the name anbeslosis to this disc-aae. didates lor this -disease. e-quatly t istui ding is the fact th.v An investigation of some HGH as asbestos is practically indestructi'-l*; bestos-textile workers in (lioat Brit while it mu / disintegrate, it is an ev ain if. lik'd disclosed that 95, or about 25 per cent, showed evidence of erlsnling c intarnmant in the atmo sphere. it has been estimated i ha asbostosis. As a result, legislation during its application as fireps'uo.un was enacted in Great Britain to re to structural steel members and nisi:-! quire improvements in ventilation decks, about 10 per cent oven-flijot and exhaust systems in anbestos-textilo plants and periodic examination of workers. Although this improve ment in working conditions length ened the life expectancy of tae.ie workers, it was Icarn-d in 1955 by Dr. Lynch in this country that as bestos workers were dying of cancer as a result of their association with asbestos. Independent investigators and is projected into the atmoaphen On high-rise structures in urixi menu, spray-asbestos fireproofing nr. > been found three and four bio-jl.: from the construction site, so in: : tiie unsuspecting general public w likewise subjected to this hazar 1 i well as the tradesman directly ii voived in its application. While tb . relationship between a casual -a. - in many parts of the works were like counter with asbestos and pos xb wise coming to the same conclusion development of disease in the p .ol i based on their studies of the associ- /has not be in established, it behoov ; alien of workers with asbestos. i f the architectural profession to co Dr. Selikoff, of New York's Mount ^ aider other materials to peiform t! Sinai Hospital, lir-.d an opoprtunily work of sprayed-on fireproofing ai ; to examine the records of members of the Asbestos Workers Union. The study eovouid a total of io22 in sulation workers between 1942 and 1952. It was found that lha death rate fiom cancer among these as bestos workers was about seven times greater than that ol the gen eral white male U. A. population. These observations are staggering. In addition, one thush_concludeJthat insulation. Not on l y is there a clear and pit ent danger in the initial uppiie.uh of psbestos on the health of the istallers, but HO or 40 years hem . when these buildings are torn cioe,. the demolition operations, if i properly controlled, will add rnoir bestos fibers to the atmosphere, T . time to u.,e substitutes for asbe-e sprayed insulation is now. Reprinted from LAC I C 1 o h i vA: A .C H lT hC fU A E , Fein tuny 1(. 7 0