1 European Conference on Asbestos Risks and Management Rome, 4 6 December 2006 MINERAL FIBRES MEASUREMENTS IN THE URBAN ENVIRONMENT E. Kovalevskiy Institute of Occupational Health, Russian Academy of Medical Sciences, Moscow, Russia A. Tossavainen Finnish Institute of Occupational Health, Helsinki, Finland
2 Russia is largest asbestos producer and consumer in the world.
3 In Russia, only chrysotile is produced and used in civil purposes in contrast to the widespread, past usage of crocidolite or amosite asbestos in Western Europe, United States and Australia. Over 50 percent of chrysotile production was and is used now for inner consumption (predominantly for asbestos cement production).
4 Amphiboles (anthophylite and crocidolite) were produced from 1947 until 1994 in small amounts (about 40 thousand tons for all history of production) for special non-civil purposes at two deposits in Sverdlovsk region.
7 Chrysotile containing materials allowed for use in the Russian Federation according to: 2.1.2/ State Standard List of asbestos-cement products recommended for use ; Letter no. 1100/ of Chief Deputy Hygienist of the Russian Federation from Asbestos products recommended for production and use at transport, equipment, industrial and common life commodities. Safety measures in use of these materials are determined by State Sanitary Regulations Use of asbestos and asbestos- containing materials.
8 Recently man-made made mineral fibres (MMMF) have found common applications as insulation wools for sound, heat and fire protection.
9 Maximum permissible concentrations of harmful substances in the working zone air (total dust, mg/m 3 ). Hygienic standards. GN Silicate containing dusts, silicates, alumosilicates: asbestos and mixed dusts contained more than 20% of asbestos 2*/0,5** dusts contained from 10 to 20% of asbestos 2*/1** dusts contained less than 10 % of asbestos 4*/2** asbestoscement dusts if magnesia dioxide contain not more 5%, chrome oxide not more 7%, ferric oxide not more 10% 6*/4** asbestos bakelite, asbestos rubber */4** talk, natural talk contained tremolite, actinolite, antophillite, etc.), contained not more 10% silica dioxide */4** man made mineral fibers silica contained fibers, synthetic */4** vitreous fibers (glass wool, mineral wool, slag wool, mullite) contained not more 5% Cr +3 ) zeolites (natural and artificial) 6*/2** * - 30 minutes STEL / ** - 8-hour TWA
10 Maximum permissible concentrations of harmful substances in the ambient air Hygienic standards. GN Asbestos 0,06 fibers/ml (by phase contrast optical microscopy)
11 Asbestos fibres have been used in a broad variety of building materials. Typical examples include asbestos cement products such as wall panels, roofing plates, water tubes and sewage pipes.
12 This pilot study was conducted to estimate the concentrations of respirable fibres in indoor and outdoor air as a source of nonoccupational exposure to asbestos and other fibrous particles.
13 The results of phase-contrast optical microscopy (PCOM) (all fibres >5 μm m in length, <3 μm m in diameter, aspect ratio >3/1 were enumerated at 450 X magnification) were confirmed with fibre identification by scanning (SEM) and transmission (TEM) electron microscopy and X-ray X microanalysis (EDXA) to identify and count different fibrous particles at X.
14 The concentration of short chrysotile fibres was also verified by transmission electron microscopy at higher magnifications. The detection limit of the measurements was about 0,001 f/ml.
15 The survey included a total of twenty buildings in Moscow: 1. Fourteen residential houses - three 5-storey 5 panel buildings from the 1960's, - four 12-storey panel buildings from the 1970's, - three 16-storey panel buildings from the 1980's, - three high-rise brick buildings from the 1950's - and one 9-storey 9 panel building from the 1970's 2. Six public buildings - hospital, - covered stadium, - theatre - and three office buildings
16 All the buildings contained some asbestos materials: -most often asbestos cement panels and pipes in dwelling areas -or thermal insulations usually contained asbestos and synthetic vitreous fibers in heating rooms at the basement.
17 In residential houses, dust samples were taken: - from entrance areas on the ground floor; - near waste ducts and fire stair cases on upper floors with direct air connection to flats area; - from indoor air of ordinary flats.
18 Fibre concentrations were measured also at five locations near Moscow motorways (North, East, South, West and Center). A series of measurements were made near a thermal power plant where large quantities of asbestos and MMMF insulations were removed, repaired and installed.
19 Five points where technical maintenance of motorcars is provided were also examined: - one private garage, where individual technical service for domestic and old imported cars is provided; - two car-repair repair shops situated on highways for domestic and imported cars;
20 - authorized service center for Lada cars; - department of technical services for small lorries, produced by domestic industry consists of two big free connected departments: garage and repair department (works with asbestos containing friction materials using high speed processing equipment are performed in turnery section of repair department).
21 For results accessing we have used: - established in Russia threshold level (measured by optical microscopy) 0,06 f/ml -and proposed in Russia for chrysotile fibres (measured by SEM with EDXA) air clearness indicator <0,01 f/ml.
22 Fibres concentrations in the air of Moscow motorways 0,009 0,008 0,007 0,006 Concentration (f/ml) 0,005 0,004 0,003 0,002 0,001 0 North East South West Center Center (near thermal power station) Phase-contrast optical microscopy (all fibers longer 5 mkm) Electron microscopy (chrysotile fibers longer 1 mkm) Electron microscopy (chrysotile fibers longer 5 mkm) Electron microscopy (chrysotile fibers < 5 mkm) In summertime samples, low concentrations of all fibres (> 5μm) 5 and chrysotile (>1 μm) were found at five locations near Moscow motorways. The mean concentrations were 0,002 f/ml and below 0,001 f/ml, respectively.
23 The concentration of all respirable fibres (>5 μm) ranged from <0,00<,0011 to 0,058 f/ml (n=234) in fifteen residential and public buildings, which were sampled without ongoing renovation. By SEM analyses, the fibrous particles consisted of: - organic fibres (55 %), - chrysotile (7 %) - and other inorganic fibres (38 %).
26 Fibre concentrations in hospital building air 0,025 0,02 0,022 0,02 0,015 Concentration f/ml 0,011 0,01 0,005 <0,001 < 0,001 <0,001 0 Corridor Elevator hall Street near entrance of building All fibers longer 5 mkm (optical microscopy) Chrysotile fibers longer 5 mkm (electron microscopy)
27 Concentration (f/ml) Fiber concentrations in living buildings 0,09 0,08 0,07 0,06 0,05 0,04 0,03 0,02 0,01 0 0,02 0,027 0,004 0, storeys block buildings All fibers longer 5 mkm (PCOM) Organic fibers longer 5 mkm (SEM) Chrysotile asbestos fibers longer 5 mkm (SEM) Other inorganic fibers longer 5 mkm (SEM) 0,007 0,011 0, storeys panel buildings 0,086 0,049 0,053 0,036 9-stores panel building (renovation of water supply sistem)
28 Fiber concentrations in 2-storeys 2 office building air Concentration (f/ml) 0,012 0,011 0,011 0,01 0,008 0,006 0,004 0,002 0,001 0,001 0 All fibers longer 5 mkm (optical microscopy) Chrysotile fibers longer 5 mkm (electron microscopy) Second floor Third floor
29 In one residential house and three public buildings (theatre, two offices), the sampling was made during the period of large renovations but without ongoing working activities.
34 The mean concentration of all respirable fibres was 0,087 (range 0,002-0,570) 0,570) f/ml in 77 samples, which were taken from five renovated buildings. About 52 % of these fibres (>5 μm) were chrysotile. Gypsum and MMMF fibres were identified in some samples but no amphibole asbestos was detected.
35 Fiber concentrations in the theatre building air 0,012 0,01 0,009 0,011 0,009 All fibers longer 5 mkm (optical microscopy) Conc. (f/ml) 0,008 0,006 0,008 0,006 Organic fibers longer 5 mkm (electron microscopy) 0,004 0, Old bulding technical premises 0,003 0,002 < 1 0,003 New buliding technical premises 0,004 Old building scene Chrysotile fibers longer 5 mkm (electron microscopy) Other inorganic fibers longer 5 mkm (electron microscopy)
36 Fiber concentrations in the covered stadium building air Concentration (f/ml) 0,012 0,012 0,012 0,01 0,009 0,009 0,01 All fibers longer 5 mkm (optical microscopy) 0,008 0,006 0,006 0,007 Organic fibers longer 5 mkm (electron microscopy) 0,004 0,002 0 Hall 0,002 Technical premises Chrysotile fibers longer 5 mkm (electron microscopy) Other inorganic fibers longer 5 mkm (electron microscopy)
37 Fiber concentrations in the 3-storey 3 office building air 0,4 0,37 0,35 0,3 0,25 0,25 All fibers longer 5 mkm (optical microscopy) Conc. (f/ml) 0,2 0,15 0,1 0,17 0,11 Chrysotile fibers longer 5 mkm (electron microscopy) 0,05 0 Second floor Ground floor
38 Place of sampling Fibres concentrations in the air at car repair stations (f/ml) PCOM (all fibers longer 5 mcm.) SEM (chrysotile fibers longer 1 mcm.) Conc. (f/ml) Samples > 0,01 f/ml Conc. (f/ml) Private garage Car-repair repair shop - 1 Car-repair repair shop - 2 Lada authorized service center 0,008 no <0,001 0,005 no <0,001 0,004 no <0,01 0,007 3 from 10 <0,001
39 Fibres concentrations in the air at car repair stations (f/ml) Department of technical services for small lorries Place of sampling unit repair section mechanical section turnery section before beginning of works high speed processing of asbestos containing friction materials PCOM SEM Conc. Samples > Conc. 0,01 f/ml 0, ,07 (1-5μm), < 0,01 (>5 μm) 3, (1-5 μm), 0,35 (>5 μm) before 0, ,05 (1-5 μm), 0,02 (>5 μm) processing 2,5 3 12,5 (1-5 μm), 1,4 (>5 μm) before 0,29 3 0,04 (1-5 μm), 0,01 (>5 μm) processing 3,1 3 20,2 (1-5 μm), 2,4 (>5 μm) Garage 0, ,07 (1-5 μm), 0,01 (>5 μm)
40 When asbestos cement materials demolition is proceeded without use of high speed electric equipment emission of free asbestos fibres is minimal. In most samples conglomerates of fibrous and nonfibrous particles were found, unable to float in the air, tend to fast precipitation.
41 Textile chrysotile fibres and EDXA spectra.
42 Chrysotile fibres for asbestos cement production and EDXA spectra
43 Chrysotile fibre from asbestos cement matrix and EDXA spectra
44 Conglomerates of chrysotile fibres with other particles released from different asbestos contained materials
45 In general, the results of this study in Moscow are consistent with measurements of nonoccupational exposure to fibrous particles in other urban areas in Russia.
46 In two large industrial centers concentrations of respirable fibres in the ambient air (>5 μm) ranged from 0,001 to 0,06 f/ml. These samples were taken from public buildings, urban environment and above asbestos cement roof for the estimation of fibre emissions from asbestos products, which are permitted for use in civil engineering according to Russian standards. From the total number of airborne fibres, chrysotile formed % when the particles were classified by electron microscopy. (Plotko E. G. et al., 1999; Kuzmin S.V. et al. 2003)
47 Conclusion In outdoor samples, the background level of chrysotile fibres was below 0,001 f/ml (>1 μm), which indicated only minimal environmental exposure originating from the friction materials of motor vehicles. Local emissions from industrial activities may occasionally contribute to the air contamination of nearby residential areas.
48 Conclusion At most sampling points of our studies the concentration of asbestos fibres was below the limit of 0,06 f/ml (measured by PCOM) that was established in Russia for atmospheric air of occupied places and proposed clearance value established as 0,01 f/ml (measured by SEM-EDXA). EDXA). Exceptions were cases when friable asbestos and MMMF containing materials were destroyed without any precautions.
49 Conclusion On the average, only 7 % of the fibres were chrysotile (by electron microscopy analyses). During renovation the dust concentrations were much higher and about one half of all respirable fibres were chrysotile.
50 Conclusion Asbestos cement materials and other asbestos containing construction materials when used with ordinary precautions without intensive destruction can not release asbestos fibers into the environment. Uncontrolled demolition and repair of friable asbestos and MMMF materials can be an important source of occupational and nonoccupational exposure to mineral fibres.
52 Worldwide Production of Asbestos in 2002 Russia Canada Kazakhstan China Japan Colombia Brazil South Africa India Zimbabwe Other Countries tons TOTAL tons AT/FIOH
53 Chrysotile deposit «Bazhenovskoe» out since is working
55 «Uralasbest» enterprise produces now about 25% of total world chrysotile production.
58 Oldershaw P., 2004
60 Mesothelioma (cases per million person per year) Russia (Asbest City) * Russia (Ekaterinburg region) * Russia (republic Karelia) * Latvia Lithuania Estonia* Slovenia Poland Latvia Slovakia Japan Romania Hungary* USA Croatia Finland Norway Sweden Germany Denmark The Great Britain France Italy Netherlands Australia Belgium 2,8 2, Tossavainen A. Asbestos, asbestosis and Cancer. Exposure criteria for clinical diagnosis. // Lehtinen S ed. Asbestos, asbestosis and cancer. Proceedings of an International Expert Meeting. People and Work. Research Reports 14. Finnish Institute of Occupational Health., Helsinki 1997, European Commission. The Fourth Framework Programme ( ), INCO-COPERNICUS Prevention of asbestosrelated diseases in Hungary, Estonia and Karelian Republic of the Russian Federation.. Final Report. 27 September 1999.)
61 «The risk estimates used in the calculations were derived from past exposures to relatively high levels of chrysotile. Current levels of exposure are much lower and as such risk extrapolations may be an overestimate. There are several other reasons why there is a great deal of uncertainty regarding these risk estimates»
62 Kashansky S V, Asbestos prodused, thousand tons Asbestos prodused, thousand tons Absolute number of cases Absolute number of cases ,1 40 0, ,001 Year Asbestos production and number of mesotheliomas in Russia ( ) 0
63 In the areas of asbestos mines and mills of the Sverdlovsk Region mesothelioma incidence rates vary from 4.3 (Asbest - chrysotile) to 27.1 (Novoasbest - crocidolite), and reach 7.1 per million a year in the Sysertsky anthophyllite province of the Urals. Kashansky S V, 2006
64 ,1 Dust level, mg/m , Dust level, mg/m3 15,2 9,8 5,9 7,1 Morbidity of malignant pleural mesothelioma ,1 1,7 1,7 5,1 4,6 3,5 4 5,3 4, * Dust levels at Uralasbest and incidence rates of malignant pleural mesothelioma in Asbest (* - according to F.M. Kogan, 1986) Morbidity of malignant pleural mesothelioma Kashansky S V,
MESOTELIOMA and CHRYSOTILE in RUSSIA Kashansky S.V., Grinberg L.M., Kuzmin S.V., Berdnikov R.B., Berzin S.A. Ekaterinburg Medical Research Center for Prophylaxis and Health Protection in Industrial Workers
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