Document 3xa0NzN7E4XKq81R5bYvpL2D

s9 (X) N i P- . . _ , . . *.J Sjiv if3':<*.** Aftt'v: ' ' Oi.:..i MW E5" Reserr anr De. r^r"! Asbestos A P B ? f! ' HFM -001219 SCF-ALLF-07341 E?A-600/3-78-066 July 1978 ASBESTOS - A BIBLIOGRAPHY . . . *>y ' . ' James H. Tucker, Philip M. Cook, Gary L. Phipps, and Gertrude N. Stokes Environmental Research Laboratory-Duluth Duluth, Minnesota 55804 and Paul H. Lima Department of physiology School of Medicine. University of Minnesota-DuluthDuluth, Minnesota 55812 HFM -001220 ENVIRONMENTAL RESEARCH LABORATORY-DULUTE OFFICE OF RESEARCH AND DEVELOPMENT U.S. ENVIRONMENTAL PROTECTION AGENCY DULUTH, MINNESOTA 55804 8{>00 *6&3  *. Dr. F. L. Pundsack \JI Presentation to Illinois Pollution Control Board October 15/ 1971 .______________________________ My name is Dr, Fred L. Pundsack, and I am Vice President of Research and Development for the Johns-Manville Corporation. I am an inorganic chemist with a Ph.D. degree from the University of Illinois, and I have been involved in asbestos research . ' v ' since 1952. I am here today representing the Asbestos Informa tion Association, an organization sponsored by nine leading . manufacturers of asbestos products to provide information on asbestos and its health implications. The members of this Association are listed in a fact sheet which I have provided. In the event that my presentation prompts questions relating to environmental control technology or the medical aspects of the asbestos situation, I have asked three experts in these fields to accompany me here today to assist in answering ques- * -. 0" tions of a highly technical or medical nature. They are Dr. .Joseph.. L. Goodman, Associate Professor, Department of Preven tive Medicine, Medical University of South Carolina, and * `ni rup+nr.,--DayKoe !-ne-Manhattan Corporation;"Mr. Isaac II. Weaver, Corporate director for Environmental Control for the Raybestos-Manhattan Corporation; and Mr. George L.- Swallow, Manager of Occupational Environr. ental Control, Oohr.s-ManvIlia Corporation. r? ;c px ? jL* i-\. L J/tii 1 i Uf / t. PJQ8001 8 5*9 , V *r HFM -001221 Before proceeding, I would like to express the appreciation of the Asbestos Information Association for the opportunity to testify on the proposed asbestos regulations. ' Asbestos has numerous important applications in our modern , industrial society. Among these, it provides built-in pro tection. against fire and deterioration in scores of common pro ducts in daily use.. Through the years it has saved countless ' *, lives and billions of dollars in property damage_by preventing or checking the spread of fires.' Asbestos-containing acoustical products make a valuable contribution to noise abatement. Products containing asbestos are used, among other applications, in the construction of schools, houses, theaters, factories, office and other public buildings, and in the insulation of furnaces, boilers and electrical equipment. %' ' _ The asbestos industry within-the state of Illinois plays an im- . ` portant role in the economic life of the state and its people. The member companies of the Asbestos Information Association own and operate a total of eigit plants within the boundaries of the ' '' . state. Some of the product lines produced at these eight plants include: asbestos-cement pipe, packings, gaskets, fric tion materials--including both conventional and disc brake lin- ings--asbestosecernent sheet products, asbestos roofing and sid- ing shingles, insulations, and many others. A total of 3,118 ' -2- _ . 8001 0550 ' HFM -001222 Illinois residents are employed at these manufacturing- faci lities. Last year, these employees received a total of . $ 24.4 million in wages, salaries and fringe benefits. Services and goods purchased within the state,, such as water, electricity, telephone service, raw materials and freight amounted to more than $ 17 million in 1970.. In addition, state, county and local tares amounting to: nearly a million dollars last year, helped to pay for new schools, roads and other benefits to the state and its citizens. The value of goods produced at these manufacturing locations last year totalled $ 70.1' million, with approximately $14.5 million worth of these asbestos-containing products being sold within the state. As you can see, the.economic contribution of the asbestos industry . in the State of Illinois, is by no means small. And the figures I have just given you represent only those companies that are members of the Asbestos Information Association. There are also within the state many other concerns -'- both large and small--whose livelihood depends in ^ome measure on the use ' v . . ' . .. of asbestos or asbestos-containing products. Such concern^ would . include many segments of the construction industry, companies engaged in the manufacture of asbestos-containing products, companies which use finished asbestos-containing products in the manufacture of other .prodsct.s, and many others. The econo.rdc , value to the State derived by the use of asbestos by these other ' '. -3- . ' HFM -001223 P-Q9001 C551 . concerns is difficult to gauge, however it would certainly double or triple the figures I gave you earlier v/ith regard to the contribution of the member companies of the Asbestos Information Association. . ' The asbestos industry has recognized for many years that there are occupational health hazards associated v/ith the excessive ih- halation of asbestos dust over long periods of time. As a re- i* * * . suit, the industry, beginning in the late 1920s, has sponsored . and'cooperated in a wide variety of scientific research projects designed to identify these hazards .and to eliminate them where-: ever they may exist, not only in asbestos mines, mills and manu facturing plants, but also among fabricators and applicators of finished asbestos products. Today, the asbestos industry, either as indivi dual companies% or throu' g* h the 'Queb. ec Asbesto s M ining Association * s sponsorship of the Institute of Occupational and Environmental Health in Montreal, is supporting medical research at such highly.regarded institutions as McGill University in Montreal, Tulane University in Louisiana, St. Luke's Hospital in Cleveland, the Environmental Sciences Laboratory at Mount Sinai Hospital in New York, .the Industrial Health Foundation in Pitts . ` . _ burgh, the University of California at Berkley, Farleigh-Dickinson University in New Jersey, the University of Pittsburgh, the Medical College of South Carolina, and'.a-number of others, both, here a:;d overseas. . In addition, the industry has cooperated extensively - -4- '. ' ' HFM - 001224 .81301 0552 r in various investigations into asbestos-health conducted by agencies of the Federal Government, including the U.S. Pub- lie Health Service, the Federal Environmental Protection Agency, the National Institute of Occupational Safety and Health, and others. In the industry's own research laboratories, ` scientists and engineers are also engaging in work related to health, developing safer packaging and handling techniques for loosely bound asbestos products and also developing and ,' , improving techniques for the measurement, and control of as bestos emissions both in the work-place and in the ambient air. As-a result of these activites, over the years the industry has amassed a substantial amount of medical knowledge and techno . logical know-how in the asbestos-health area. Basically, the known facts about asbestos-related disease can be summed up as follows: . ^,First, asbestos-related health risks are basically confined to'N f the occupational and para-occupational setting. / Second, the effects of excessive inhalation of asbestos are both time and dose related. This means that asbestps-related diseases may develop, generally, only after the inhalation of substantial amounts of asbestos dust over a substantial period of time. ' .. ~" . 0U1 0553 f if:- i; f'-':: HFM - 001225 And third, there is presently no evidence of hazard to_the general public from exposure to the minute amounts of as . bestos that may be present in community air. i I Because the general purpose of the regulations under dis cussion here today is to prevent the emission of hazardous quantities of asbestos fibers into the .air that the general public breathes, I will restrict my further comments on health to this area. It is very important to realize in any discus- sion of a possible public health' hazard from asbestos exposure ; i- t is that the. only scientific studies we have to go on are those of of people in occupational and para-occupational environments. There is ho basis for assuming that data on occupational health risks associated with heavy, long term asbestos exposure can be applied to the general public without taking into consideration* *y '! i v the vast differences in.exposure between the two. Despite the fact that the only studies in existence are of occupational and para-occupational populations, a careful ' O' . . analysis of the data available can give us some general infor- . mation about the question of a possible public hazard from asbestos. . The substance of this information"is-that diseases ' /'associated with occupational exposure to asbestos are dose re lated and that the doses below which no measurable, increase in i / disease occurs are far higher than any dose to which the general public is exposed. . ' ' -G- ' ' ' ...... ., " ' ' * I ROffl 055fc HFM -001226 . This evidence is based on a number of epidemiological-studies-----three of the most prominent-being one by Dr. J. Corbett McDonald of 10,421 past an4 present asbestos mining and milling workers in Quebec, a second by Dr. M. L. Newhouse of 4,500 men who were employed in a British asbestos factory between 1933 and 1964 and the Third a study by Drs. Knox, Doll and associates of 878 workers in an asbestos textile factory, also in Great Britain. Dr. McDonald, in his study, divided his subjects into eight categories, based on length of employment and severity of dust exposure. He noted that only in the highest time-exposure category comprising five per'cent of the total, was there any increase in ' deaths from respiratory and cardiac diseases, including lung cancer. Taken as a group, the Quebec asbestos' workers had a mortality rate from all causes lower than the. level expected in the general population. .. Dr. Newhouse in her study in Great Britain found that workers who had lOw and moderate occupational exposure to asbestos dust showed a rate of deaths from diseases of the lung, including cancer of the lung and pleura, that were comparable with that of the general public. On the other hand, another study by Dr. Newhouse of mesothelioma (a relatively rare cancer of the lirtifig around the lungs) in the London area shoved a small number of cases among people who lived in close proximity to an asbestos textile plant . and also among people living in the household of an asbestos worker, who presumably brought home quantities of the material |in his- . clothes from work. . The intensity of exoosure exberienced. by these- -.7- 8501 0555 " HFM -001227 # . ' > _ * > , so-called para-occupational populations in London is difficult '. to gauge, but there is every- reason to believe that they were I L in fact higher than the low and moderate occupational levels in factories that have been shown to produce no excess of mesothelioma. These studies do, however, point up the need for proper control j of emissions of asbestos from factories so that neighboring areas : will not suffer para-occupational exposures to asbestos. - ' ,. ' ' . - ' ' . .` The Knox.-Doll study, like the Newhouse and McDonald studies, . confirmed the fact that low to moderate levels of asbestos ' *- M :t '| lf exposure will hot produce an excess of disease. It should always be remembered that these low to moderate levels in occupational settings inside factories were certainly higher than any to which the general public in this country is exposed,- . j. In addition to these studies, there are several studies of the effect of various doses of asbestos on laboratory animals which also indicate that there are dose levels below which no measurable disease effect is observed. Dr. William Smith of Fairleigh- Dickinson University studied mesothelioma cancers in hamsters, and his data show that below certain specific doses of asbestos,- ' no cancers were observed to develop over the entire natural life span of .the animals. Dr. Merl Stanton of the National Institute v ; 5^ of Health, Bethesda, Maryland, conducted a somewhat similar - study with rats and observed the same type of dose-related . '_ response. . . '\ -8 8001 0556 i.v HFM - 001228 The most well-known of the American epidemiological studies ' related to asbestos exposure is that made by Dr. I. J. Selikoff of 632 members of the Heat Frost and Asbestos Insulation Workers Union in the New York/New Jersey area. These men, for the most part, are journeymen-craftsmen who .work on construction sites and apply insulation to boilers, steam and hot water pipes, heating ducts, etc.', during the construction of a building or a power plant. They may also be involved in . tearing.off old insulation. When one construction job is completed, they move to another construction job. The' occupational environment to which they may be exposed involves not only asbestos but also silica and particulate materials In addition they are exposed to a variety of fumes from organic solvents and adhesives with which they work. In short, they have a widely varied and,.in the past at least. .' a relatively uncontrolled occupational dust and fume exposure...... Dr. Selikoff found that the death rate from lung cancer was extremely high in this group of 632 workers, but that this very high mortality rate occurred almost exclusively** among those workers who were cigarette smokers. . ' On the othwr hand, thdse workers who had no history of \ . cigarette smoking had essentially no greater incidence of lung cancer than the general population of non-smokers.:Jr_ . ., ' . . . '` ' .`' -__ ir -9- 8001 05-57 HFM - 001229 In general, the mortality rate of insulation workers reported by Selikoff is much higher than the rates found in studies of larger groups of people who work in. factories producing asbestos-containing products,and in mines and mills processing asbestos. Why the incidence of certain diseases among insulation workers is so much higher than the other groups studied is .a question as yet unanswered. ; . Unfortunately, as is so often the case with diseases that take from 10 to 40 years to develop, reliable data as to the past occupational exposure of these men to asbestos arid other potentially hazardous dust and fume's in their work are not available. As a result, at the present time we have little information t' %* as to what other factors may have influenced.their high rate of disease except that those insulation workers who smoked cigarettes developed lung cancer at a rate far higher than the general population who smoked. In 1970, with a grant from the National Air Pollution Control Administration, The National Academy of Sciences called . together a blue-ribbon panel of asbestos-health experts to ' draft a document on* the problem that would serve as the HFM -001230 10 8001 0553 - medical basis for the Federal asbestos emission standards. Among those asked to serve on the panel were Dr. Clark Cooper of the University of California, Dr. Lewis Cralley of the Public Health Service, Dr. George Wright, Dr. Irving Selikoff and others. . -5 The result of their study was a fifty-three- page document ' . on asbestos/health. As a conclusion to this part of my presentation, I would like to read a few pertinent excerpts from the report, which constitutes the most up-to-date ' evaluation of the asbestos-health problem that is available. "S )n page 20, the report states (quote) We cannot extrapolate from the mortality experience of those who are directly and. indirectly exposed in - their employment to the general 7 public who have had moderate or slight exposure from ambient r.-Jai There is evidence to suggest a gradient o^ effect- from direct occupational, to. indirect occupational, to family r-- _______________ . ____ and neighborhood situations, in all of which dust concentra- . tions are probably high by comparison with most community air. This suggests that there are levels of asbestos ' exposure that will not be associated with any HFM -001231 10 a- 300] 0559 Wr-.t? i] Hf| I: t: * 'i s : c. detectable risk. What those levels are is not known,_but there is no evidence that persons in the general population--without occupational, household or neighborhood exposures--have any increased risk of neoplasm, even though there may be ferruginous bodies or fibers in their lungs (end quote). In the conclusion and recommendation section of the report for the National Academy of Sciences, the following statements are made: . ' (quote) At present, there is no evidence that the small numbers of fibers found in most members of the general population affect ; health or longevity. Asbestos is too important in our technology . ' and economy for its essential use to be stopped. But, because of the known serious effects of uncontrolled inhalation of asbestos minerals in industry. . . it would b.e highly imprudent* to permit.unrestricted additional contamination of the public environment with asbestos- (end quote). I believe that these statements from the report adequately e.x- ' . '. 'o- . press the position of the asbestos industry with regard to the health hazards of asbestos; We do not believe that at present . the general public is in danger from the minute amounts of asbestos that exist in the ambient air. However we also believe that it is prudent.and feasible to establish reasonable emission cor.trol-o>that: vrill pi-btec!: the public and ensure that hazardous levels of asbestos will not develop in the community air in the future. ' 11- 8001 CFfcOTKJJ: HFM - 001232 . With this position in mind, I would now like to discuss the asbestos regulations proposed for the State of.Illinois. To begin with, I would like to commend the Illinois Pollution Control Board for its efforts to ensure a safe environment-for the ' . State and all its citizens. Your credentials as a progressive yet fair control board are well known and respected in environ mental circles throughout the nation. . While the asbestos industry as represented.by the Asbestos Information Association is of the position that there is presently no hazard to the general public from the minute amounts of . . asbostos existing in the community air, we nevertheless are in * favor of regulations designed to accomplish one or more of the following three objectives: One, to ensure the health and safety of those occupationally exposed to asbestos fiber. -Two, to prevent possibly hazardous amounts of asbestos fiber from escaping into the ambient air, and . .' ' . <*' Three, to eliminate, w.here possible, the nuisanc, e of even small . amounts of asbestos fiber from escaping into the ambient air. .' While this third point is not directly related to health because of the small amounts of fiber involved, we wholeheartedly support the position that the environment should be as clean as possible. ' For these reasons, we support most of the items .in the proposed regulations. However, we do have several specific comments and ' ' . ' -12- ` . ' ^ I- ' 8001 0561 - :- HFM - 001233 suggestions to make regarding the regulations that we hope . will be of help to the Board in arriving at a final document that will not only be effective but also practical and reasonable. I will discuss the sections upon which we wish to comment in the order in which they appear in the regulations. Our first suggestion is with regard to Part II: General Require ments, Section 201. This section calls for the obtaining of a permit to engage in any activity which could discharge asbestos fiber into.the environment. We feel that this section is not specific enough with regard to which activities would be covered. As you are probably aware, in the vast majority of asbestos- containing products used in the country, the asbestos is locked ' * . in place with cement, plastics or other binding materials, and does not constitute a source of emissions to the atmosphere. Asbestos-cement pipe and vinyl-asbestos floor tile are examples of such products. Other products and activities do constitute . possible emission sources, and underethe regulation would require a permit. If it would be of help to the Board, the Association I represent would be most willing to prepare a list of those products in common use -where the asbestos is in a nOn-locked-in or loosely-bound state and -thus constitute a possible, emission source which would require a permit. . O01 0562 As to Section 201, Sub-section B, requiring a. satisfactory course of health instruction for employees' in those. . . .' ' !_ - industries involving the handling of loose or loosely-bbund asbestos products, I would like.to point out that ' : -- ; -13- HFM- 001234 the various trade associations in the asbestos industry, have over . the years produced a number of safety px'actices manuals and book lets dealing with various sections of the industry. The Asbestos Information Association would therefore recommend for your con i ' sideration as instructional material for use under Section 201, . . Sub-section B, the safety practices booklets which I have sub mitted to the Board with my presentation. The four booklets are: 1. Recommended Safety Practices for Handling Asbestos Fiber / 2. Recommended Health Safety Practices for .Handling and Fab . ' ricating. Asbestos Textile Products. ` ' 3. Recommended Practices for Fabricating, Handling and Apply ing Asbestos-Cement Products in the Building and Construc tion Industries...and * . .. . '. . * 4. Recommended Health Safety Practices for Handling and Apply . ing Thermal Insulation Products Containing Asbestos. Under Part V, Section 501, it is our opinion, that Subsection B, which' requires the enclosure of walls^before toppling during demolition, is both impractical and unnecessary. We know of ho suitable method for enclosing the walls of a structure during demolition. Even more important is the fact*that there is, in reality, very little asbestos'used in the construction of a modern, medium-sited or high-rise structure. In addition, dust counts taken during the demolition of a building in . -14- ' - HFM - 001235 80 0] 0563.- Easton, Pennsylvania, which did contain significant quantities : of asbestos products, showed very little dispersion of fiber into the surrounding air, both upwind and downwind of the . '' ' demolition site. This is due to the fact that most asbestos- . ' containing products in which the fiber is locked-in with ce- ment, plastic or other binding materials do not readily re- \ . lease fiber in the atmosphere,'even during demolition. Sub- section A-of. Section 501 requires the prior.removal before / toppling of boiler and pipe insulations....two asbestos . containing products that might release dust from improper : demolition. 'Since this will remove any loosely-bound asbestos ` . : products, from the structure, we believe enclosure of the walls to be unnecessary, and recommend that simple wetting ' * v. . ' ', - of the walls to be toppled would be sufficient to control the ' dispersion of dust from whatever small amount, of asbestos . containing products fhe walls might contain. . With regard to.Part VI, Section 601 of the regulations, we .' would like to recommend for your consideration a completely new approach to the control of asbestos emissions from manufacturing * '* ' .' . - * ' \ ; -is- ' HFM- 001236 8001 0564-  operations.' As presently written, the regulations call for the establishment of a numerical emission standard of".5 fibers per cubic centimeter of air from any manufacturing operation, and .05 fibers per cc of air at the boundary line of the plant or factory. .. ' We would recommend that Section 601 of the regulations be re written so as to substitute a control practice, standard for the present numerical emission standard. The reasons for this recommended approach are varied, but are primarily based on the lack of specific data with regard to safe non-occupational levels and the difficulty of accurate and meaningful emission sampling ' ' * . . techniques at very low fiber concentrations. The Federal Environmental Protection Agency studied this problem very carefully in preparing its national emission standards on asbestos, and arrived at the conclusion that a numerical standard was impractical at this time. In this regard, I would like to read a few excerpts from a document prepared by the EPA as justification for this viewpoint. icm _ nni237 -16. . .. fliOOl 0565 The document states that ideally, national emission standards for asbestos would be established on v. concentration basis related to health effect's and would provide an ample, margin of protection to the public health regardless of the number of . sources.in a given geographical area. There are many practical considerations, the report goes on, which prohibit the establish ment- of a numerical standalrd at . this time. Foremost of these problems is the lack of a data base.This base is lacking from both the health-effects standpoint for non-occupa- tional exposure and the emissions standpoint. The majority of data available on asbestos health effects is related to occupational exposure and cannot be readily extrapolated to non-occupational levels. . ' ' % ' - . .` A little later on, the report states that (quote) a control prac tice apprach to reducing asbestos exposure levels offers a prac tical alternative to numerical emission limits. A major advan tage of a control practice standard would be realized in enforce ment. Inspectors could be easily trained to certify compliance .'with control practice regulations (end quote) . ** The report goes on.to describe some of the many difficulties involve; in asbestos sampling and analysis, especially with regard' to. emissions into the ambient air, and concludes that present tcch- niques are not only time consuming and expensive, but-that they ' "' . ' . -17- , '. ' . . ^ r' " ' . .. ' : ; .: 3'0 01 r>5(>6~ HFM -001238 . . ' also ,. tend . . to distort . . . . . . *- the concentration of.asbestosin the I \ \ I t sample ' being analyzed and are hence not meaningful in establishing the , actual amount of asbestos being emitted into the atmosphere. : The "National Academy of Sciences Committee report on asbestos health, which I quoted from earlier/ agrees with the EPA position on numerical standards. It states (quote) because of methodologic and other uncertainties, it is not yet feasible to base control on numerical ambient air quality standards (end quote). . I will not go into detail on the specifics of a control practice ` t, , . standard since they would be primarily of an engineering nature, however, I will submit for your consideration, as soon as they are published, the asbestos emission standards proposed by the Envi ronmental Protection Agency. These standards will contain suf ficient information to set up a similar program for the State of II Section 602 of Part IV of the regulations deals with, the dis charge of asbestos-containing waste into .the sewage systems or waters of the state. We believe that this section is un necessary. In the first place, the water pollution "control ' systems in use in most asbestos manufacturing plants across the state effectively remove the majority of asbestos wastes from the effluent before discharge into state waters * ' ` * .' .: 18- - '' .' ' . . . --^ .. ir - 8001 0567 ` , - HFNI -001239 Secondly, sewagfe plants also remove asbestos fibers from waste water during purification. In reality, the high dillution of small quantities of asbestos fibers in water'is as effective.' .' * * and safe a method for the disposal of asbestos wastes, as could-* be devised. There is no evidence that the swallowing of small N . . \ amounts of asbestos constitutes any health hazard whatever. ; In addition, studies conducted by Johns-Manville have found small amounts of asbestos fiber in samples of water tested from sources all over the United States, including well and spring water. The reason for this is quite simple. Asbestos- . . bearing serpentine rock is to be found in a majority of the ' states of the union, including Illinois, and the simple.process of water flowing over and through these rocks er^trodes a certain amount of asbestos, fiber. ' _. *. . . . - Thus, we have all been drinking tiny amounts of asbestos in our water since birth, without any discernable adverse effects. In Part VII, Section 701 of the regulation's, we would recommend the addition of the word "visible" in the next to the last'line, so that the amended section would read: "No product which may emit -19- , ` HFM -001240 .. 3001 0S6tf ..O*' asbestos-fiber during its transportation shall be transported unless such product is enclosed in such a manner as to- preclude the "visible" emission of asbestos fiber into the ambient air." The problem here is once again with analysis techniques and enforcement. The EPA has gone to a (quote) no visible emissions (end quote) standard in circumstances similar to this one, and we would recommend-to the Board that this also be applied in Illinois. This would also be useful in.other sections of the proposed regulations where measurement and enforcement would tend to be extremely difficult if not impossible. . Our final comment is with regard to Part VIT, Section 702, which would prohibit the use of asbestos in the brake lining of vehicles manufactured after January 1, 1975, and sold for use within the State of Illinois. We believe that on the basis of the existing, scientific evidence such a prohibition is completely unnecessary. In 1968, this .* . ' %. * . question was investigated thoroughly by the United States Public Health Service, and a report on these investigations by Jeremiah R. Lynch, entitled "Brake Lining Decomposition Products" was published in the Journal of the Air Pollution Contnal Association. The report stated that (quote) except in all but the most extreme driving con- . ditions, only a very small fraction of the 30 to 50 per cent asbestos present in a brake lining escapes into the atmosphere as free fiber, (end quote). Lynch found that the average amount of free fiber released was legs than one per cant of uhe fiber present in the brake lining composition. The percentage was higher only under conditions that would have resulted in brake failure. Lynchtfurbher -20- 3001 0569 HFM -001241  ' reported that, the majority of the fiber in l-inings vas converted - ' .I ' . ' into an inert non-fibrous material by the heat of friction-, and . . - concluded that the use of asbestos-containing brake linings was )i t j J .-; "an inconsequential health factor in urban air pollution." His conclusion is reasonable in light of the fact that hundreds of millions of cars using asbestos-containing brake linings have been stopping j and starting in this country for more than half a; century,' and yet there- * has been no epidemic of asbestos-related disease among the general . *. , * .* public nor have significant quantities of asbestos been demonstrated f '\ ;j .< ii I to exist in the community air. While we consider this evidence to . -j be conclusive, if the Board is still concerned about asbestos emissions , `` ' ' .` from brake linings, you will be interested to know that the Federal I '7 ^ jj Environmental Protection Agency has contracted with the Bendix Cor--. poration to do additional tests in this area. This study is due . for completion in June of 1972, and we would recommend that the Board, at the very least, await the outcome of the EPA study before making a final decision on asbestos-containing brake linings. It is our , belief that the Bendix study will confirm the conclusion reached by f Lynch as to the safety of asbestos-containing brake linings. # This Concludes my presentation on the proposed- regulations. I have submitted for your consideration copies of all the medical papers, reports, booklets and documents that I referred to in my presentation. I would once again like to express the appreciation of the Asbestos Information Association for the opportunity to appear here this ' morning. Thank you. \ 21 __' 80.01 0570 . u HFM -001242