Asbestos Risk Research Articles

Supporting companies dealing with asbestos risk: Practical tools for occupational health services, risk prevention specialists, and companies

Supporting companies dealing with asbestos risk: Practical tools for occupational health services, risk prevention specialists, and companies

Asbestos risk from NHS buildings is far from a thing of the past

Asbestos risk from NHS buildings is far from a thing of the past

Cancer risk assessment of exposure to asbestos during old building demolition.

Years ago, the use of asbestos in construction materials was common. Although asbestos has been recently banned in many countries, exposure to asbestos during old building demolition is not unexpected. The aim of this study is to assess the concentration of exposure to asbestos and estimate its cancer risk among old building demolition workers. In this study, personal air samples were collected during building demolition. The number of asbestos fibers in collected samples were determined according to the NIOSH-7400 standard method. Chemical compositions of fibers were assessed using scanning electron microscopy (SEM). The carcinogenic risk of exposure to asbestos was determined based on the recommended United State Environmental Protection Agency (USEPA) method and Monte-Carlo simulation used to estimate the probability of cancer. Chemical analysis confirmed the presence of asbestos in collected air samples, and 67% of counted fibers were asbestos. In a number of buildings, workers had exposed to asbestos that was higher than occupational exposure limit (0.10 f/ml). Results of cancer risk estimation showed that cancer risk were considerable among workers. Implementation of asbestos risk management program such as separation of asbestos containing material, personal protective equipment's and use of wet method in demolition could minimize asbestos exposure during old building demolition.

Manufactured doubt and the EPA 2020 chrysotile asbestos risk assessment

While all forms of asbestos have been determined to be carcinogenic to humans by the International Agency for Research on Cancer (IARC) as well as other authoritative bodies, the relative carcinogenic potency of chrysotile continues to be argued, largely in the context of toxic tort litigation. Relatively few epidemiologic studies have investigated only a single form of asbestos; however, one study that included an asbestos textile plant located in Marshville, North Carolina that processed chrysotile asbestos was used by the United States Environmental Protection Agency (EPA) in 2020 to help inform the agency's chrysotile asbestos risk assessment. During the EPA proceedings toxic tort defense consultants submitted comments to the EPA docket and made public presentations asserting that the Marshville plant had processed amphibole asbestos types and should not be used for the chrysotile risk assessment. A detailed evaluation of defense consultant assertions and supporting information and a full assessment of the available information concerning asbestos types used at the Marshville plant was undertaken. The preponderance of evidence continues to support the conclusion that neither amosite nor crocidolite were likely to have been processed in the Marshville textile plant. Defense consultants' assertions about chrysotile use are not supported by the preponderance of evidence and constitute an example of manipulation of information to cast uncertainty and doubt rather than to seek truth and contribute to the body of scientific evidence.

Lung Cancer and Pleural Mesothelioma Risk Assessment for the General Population Exposed to Asbestos in Different Regions of Tehran, Iran.

Asbestos is a natural fiber leading to health risks like chronic lung diseases. The current study aimed to estimate pleural mesothelioma and lung cancer risk for population exposure to asbestos in Tehran, Iran. A cross-sectional study. According to the annual report of Air Quality Control Company (AQCC), from 2011-2020, carcinogenic risk and mesothelioma were assessed based on the Environmental Protection Agency (EPA) method using the Monte Carlo simulation (MCS). The relative risk (RR) of mortality cancer was calculated based on Camus and colleagues' model. Moreover, mesothelioma risk was estimated by Bourgault and colleagues' model. The mean concentration and health risk of asbestos in ambient air generally reduced from 2011 to 2020. The highest mortality risk for lung cancer was 8.4 per 100000 persons in 2011 and reduced to 1.8 in 2017. For mesothelioma, the corresponding values were 8.96 per 100000 persons in 2011 and reduced to 1.92 in 2017. The findings of this study could be helpful to health policymakers in the management of asbestos risk.

The concentration and prevalence of asbestos fibres in Christchurch, New Zealand's drinking water supply

Abstract Asbestos cement was a common construction material for water pipes during the twentieth century, as a replacement for metal piping that was vulnerable to corrosion. We report on the presence of asbestos fibres in drinking water supply in Christchurch, New Zealand from ageing asbestos cement reticulated water supply. By sampling the mains water supply via hydrants, 19 of our 20 samples showed long asbestos fibres (>10 μm), with an average concentration 0.9 million fibres per litre (MFL). Short asbestos fibres (>0.5 μm) had an average concentration of 6.2 MFL. Sampling was targeted to pipes from 1930 to the 1960s and there was abundant evidence of fibres being released from pipes of this age. Municipalities cannot continue to rely on ageing asbestos-cement piping, as it appears to be releasing asbestos fibres into drinking water with uncertain health implications, and should prioritise replacing pipes greater than 50 years in age, especially where high water pressures or land disturbance occur, to reduce the risk of water-carried asbestos being released into urban environments, and mitigate any risk of asbestos from ingested contaminated water sources.

Characterization of asbestos exposures associated with the use of facial makeups.

There has been renewed interest in the safety of cosmetics that may contain asbestos or other elongate mineral particles at very low levels as a naturally occurring contaminant. The authors evaluated asbestos exposure during the application of facial makeups in a constructed chamber simulating a bathroom space. The facial makeups tested included products previously found to have very low or "trace" asbestos content by governmental and commercial laboratories using a variety of bulk analysis methods. Tremolite asbestos was detected in five of 54 personal air samples and three of 72 area air samples in 18 simulations. The calculated geometric mean and 95th percentile task-based asbestos concentration associated with personal facial makeup use in this study, incorporating censored data, is 0.0015 and 0.0018 fiber per cubic centimeter (f/cc), respectively, with a corresponding 95th percentile 24-h time-weighted average (TWA) asbestos concentration of 0.00008 f/cc for three applications per day in a simulated bathroom with no active ventilation. Based on these results, cumulative non-occupational asbestos exposures confer a less than one in 1,000,000 risk of asbestos-related disease based on many typical usage patterns and less than 1/100,000 risk with upper-end lifetime usage patterns, using the US Environmental Protection Agency asbestos risk model.

US EPA to strengthen asbestos risk evaluation

In a win for environmental and public health groups, the US Environmental Protection Agency on Oct. 12 committed to broadening and speeding up its review of the health risks of asbestos under two legal settlements . Asbestos is one of the first 10 substances the EPA evaluated under the 2016 revisions to the Toxic Substances Control Act (TSCA). The agency released its final assessment Dec. 30, 2020, finding unreasonable risks to workers and consumers who handle many products containing asbestos, including chlor-alkali diaphragms the chemical industry uses to produce chlorine. But the EPA did not evaluate risks from legacy uses of asbestos, such as insulation and other construction materials that are still found in older buildings. The agency also did not consider all forms of asbestos and instead focused only on chrysotile, the type of asbestos imported into the US. The EPA said it would assess legacy uses in a

US EPA to strengthen asbestos risk evaluation

US EPA to strengthen asbestos risk evaluation

Awareness, knowledge and training gaps regarding asbestos among General Practitioners: a pilot study.

SummaryGeneral Practitioners (GPs) have good knowledge of health status and sociocultural backgrounds of their patients, thus could be decisive in early detection of cases of asbestos-related diseases (ARDs). In this cross-sectional pilot study, we investigated perception and knowledge on asbestos risk amongst a sample of GPs practicing in Molise region, central Italy, who have anonymously completed a 29-items questionnaire specifically developed for this research. Based on GPs’ answers, we obtained scores and classified awareness and knowledge into four percentage quartile classes including inadequate (0-24%), poor (25-49%), moderate (50-74%) and high (75-100%), and scarce (0-24%), sufficient (25-49%), good (50-74%) and optimal (75-100%), respectively. Twenty-eight GPs (median age 63 years; 82% male) participated. Perception and knowledge among participants varied from 62 to 84% and from 18 to 42%, respectively, with 65 and 42% showing an adequate level, respectively. Our survey revealed a satisfactory perception and knowledge of general features about this topic, while a poor awareness of detailed aspects, underlining the need of continuing medical education in the field of occupational medicine. The study remarks that criteria for ARDs diagnosis should be better specified, introducing a detailed list to harmonize medical protocols for symptoms identification and patients’ examination. Hence, increasing awareness of asbestos risk and ARDs among GPs represents a crucial opportunity, because of their prominent position to promptly take care of patients and provide targeted information.

Inventory of occupational exposure to asbestos with particular reference to Tuscan workers

This Catalogue is a collection of information on the use of raw asbestos and asbestos-containing materials used in several industries and occupational activities, with particular attention to the situation of Tuscany, a region of Central Italy. The work was developed at the Institute for Cancer Research, Prevention and Clinical Network (ISPRO) of Florence, where epidemiologic research and surveillance activities have been developing since 1988 and where the coordination and evaluation of the regional health surveillance programme provided to past asbestos workers started in 2016 and is still ongoing. The Catalogue aims at being a working tool for all health professionals engaged in examining and classifying the occupational asbestos exposures of subjects both affected by diseases that could be associated to this carcinogen and examined within the regional health surveillance programme. It is necessary for the health personnel engaged in the above-mentioned activities to know or to have the possibility to find exact and detailed data on asbestos exposure by occupational sector. These data are briefly described in the 29 factsheets this Catalogue consists of. In each factsheet, the presence and every use of asbestos are described, with reference to a precise occupational sector. Several occupational sectors can be considered together because of analogies on asbestos exposure. Occupations are considered on the basis of existing evidence on the use of raw asbestos or asbestos-containing materials (as semi-finished or finished products or as auxiliary materials in production processes). Besides the presence and use of asbestos, a description of the possible exposures of workers is reported. Sources of information were scientific and grey literature as well as the 7,187 occupational histories of mesothelioma registered by the specific Tuscan registry. Some factsheets have been revised and enhanced by Italian experts on the asbestos exposure with a specific competence in the examined sectors. Each factsheet includes also questions to be addressed to workers in order to examine in depth their possible asbestos exposure. For those who would like to expand their knowledge on this topic, references are reported both at the end of each factsheet and at the end of the volume. In all industrialized countries, also in those which have not already banned asbestos use, a decrease in the use of this material and in the relative exposure have been observing since the end of the Seventies, few years after the general consensus within the scientific community on asbestos carcinogenicity. This decreasing trend has been becoming greater and greater since the end of the Eighties, when more restrictive regulations have been approved and applied, especially in occupational settings. Nevertheless, nowadays asbestos-related diseases are still diagnosed due to past exposures, although during next decade a decreasing incidence of malignant mesothelioma - the cancer most specifically related to this carcinogen and characterized by a very bad prognosis and the longest latency - could be observed. Particular attention will be paid to jobs regarding renovation of old buildings containing asbestos and to decontamination activities. In conclusion, this Catalogue is a working tool - although it is not exhaustive and could be upgraded with new information - for all professionals engaged in asbestos risk prevention activities as health personnel, personnel of insurance companies, employers, and employee representatives.

Occurrence, spatial distribution, seasonal variations, potential sources, and inhalation-based health risk assessment of organic/inorganic pollutants in ambient air of Tehran.

The present study evaluated the concentrations, spatial distribution, seasonal variations, potential sources, and risk assessment of organic/inorganic pollutants in ambient air of Tehran city. Totally, 180 air samples were taken from 9 sampling stations from March 2018 to March 2019 and were analyzed to determine the concentrations of organic pollutants (BTEX compounds and PM2.5-bound PAHs) plus inorganic pollutants (PM2.5-bound metals and asbestos fibers). The results revealed that the mean concentrations of ∑ PAHs, BTEX, ∑ heavy metals, and asbestos fibers were 5.34ng/m3, 60.55µg/m3, 8585.12ng/m3, and 4.13 fiber/ml in the cold season, respectively, and 3.88ng/m3, 33.86µg/m3, 5682.61ng/m3, and 3.21 fiber/ml in the warm season, respectively. Source apportionment of emission of the air pollutants showed that PAHs are emitted from diesel vehicles and industrial activities. BTEX and asbestos are also released mainly by vehicles. The results of the inhalation-based risk assessment indicated that the carcinogenic risk of PAHs, BTEX, and asbestos exceeded the recommended limit by The US environmental protection agency (US EPA) and WHO (1 × 10-4). The risk of carcinogenesis of heavy metal of lead and chromium also exceeded the recommended limit. Thus, proper management strategies are required to control the concentration of these pollutants in Tehran's ambient air in order to maintain the health of Tehran's citizens.

Geographic study of mortality due to mesothelioma in Peru and its evolution

BackgroundPeru has a public health problem because of asbestos imports. We analyzed the mortality trends for mesothelioma in Peru and its provinces from 2005 to 2014 and estimated their relationship with the amount of asbestos imported previously. MethodsWe computed age-standardized mortality rates (ASMRs) per 100,000 population (direct method and SEGI world standard population reference), and the standardized mortality ratio (SMR). The relationship between the amount of asbestos imported annually along the period 1965–2010 and the number of mesothelioma deaths per year from 2005 to 2014 was estimated by log-linear Poisson regression models and Pearson correlation calculations. ResultsAfter correcting the number of deaths, Peru registered 428 cases (or 430 when corrected cases are rounded by sex) between 2005 and 2014. The highest ASMRs were in Arequipa and Callao (range: 0.40−0.41/100,000 population), followed by Huancavelica (0.36/100,000 population). This translates into approximately one death per each 68–111 of asbestos tons imported. The latency period for the higher level of positive correlation found was 8 years (r = 0.8). Male female sex ratio was lower in provinces such as Junin and Hunacavelica with geological asbestos risk. ConclusionsTwo patterns of mesothelioma risk have been detected, occupational and environmental. During the 2002–2006 years, Peru increased the asbestos use. If crocidolite imports were also increased, this could be behind the 8 years latency period detected. Peru should boost strategies towards the total ban of all forms of asbestos.

Methods to safely reduce the costs of managing asbestos

Estimates suggest that 10 per cent of the cost of demolition and as much as 5 per cent of spend on refurbishment can be allocated to the management of asbestos, which is still present in 2.4m homes and three-quarters of commercial, municipal and industrial premises — typically located within the fabric of these buildings. These costs can be significant when applied to a large property portfolio or construction project. This paper provides a number of suggestions whereby this spend can be reduced without compromising safety. Financial savings can be made throughout the life cycle of the asbestos management process from survey planning and methodology to limiting damage, avoiding out-of-hours working, accurately predicting asbestos risk, targeting analytical works and making use of a government scheme to claim tax relief on all costs of decontaminating property assets.

Epidemiology of Mesothelioma

Since 1973 the International Agency for Research on Cancer has classified asbestos as a certain carcinogen, but today it is still used in several countries. To date, mesothelioma risk is certainly linked not only to occupational exposures but also to environmental exposures. The incidence and mortality are increasing worldwide, especially in developing countries where asbestos is still often used without adequate measures for worker safety. The epidemiological surveillance systems of related asbestos diseases are instruments of public health adopted internationally. The experience and the operating methodology of the Italian mesothelioma registry and the data produced from 1996 to 2015 highlight how in countries where the asbestos ban has been active for over 20 years the risk of asbestos remains present, especially in the construction sector as well as for the environmental exposures of the resident population near companies that used asbestos in their production cycle. Worldwide, it is necessary to introduce the ban on the extraction, processing, and marketing of asbestos as claimed by the international scientific community.

Environmental Health Education for Asbestos-Contaminated Communities in Italy: The Casale Monferrato Case Study.

Background:Environmental health education contributes towards increasing awareness of communities to prevent exposure to hazardous substances. Casale Monferrato, the operating site for the Eternit asbestos-cement factory from 1907 to 1986, is a prioritized asbestos-contaminated site for remediation in Italy. The area is prone to severe asbestos-related diseases. About 50 cases of mesothelioma are diagnosed in Casale Monferrato annually; mesothelioma has been shown to be caused by occupational, environmental and domestic asbestos exposure.Objectives:The goal of this paper is to analyze the Casale Monferrato case study in terms of youth engagement in environmental health education initiatives on asbestos risk and health impact. The paper aims at underlining the lessons learned in order to share the success of this initiative with other communities living in asbestos-contaminated sites in different countries.Methods:Peer education methodology has been used through the Asbestos Classroom to involve teachers, students and other local stakeholders in training activities, in selection of the contents for educational materials and interactive tools, as well as in choosing the presentation process for the aforementioned knowledge sharing instruments.Findings:From November 2014 to June 2018, 185 high school students and teachers were trained through the Asbestos Classroom. Through December 2018, they trained 3,241 classroom visitors. The Classroom relies on an inclusive participative process in which young people play a key role in the network of relationships within their community.Conclusions:The paper corroborates the importance of engaging the educational system in communication efforts aimed at fostering collective awareness on environmental risk and health-related impacts for communities living in industrially contaminated sites. Considering the global dimension of the asbestos contamination and disease burden, this experience might be of relevance both in countries that banned asbestos and in those where asbestos is not yet prohibited.

Potential Airborne Asbestos Exposure and Risk Associated with the Historical Use of Cosmetic Talcum Powder Products

Over time, concerns have been raised regarding the potential for human exposure and risk from asbestos in cosmetic-talc-containing consumer products. In 1985, the U.S. Food and Drug Administration (FDA) conducted a risk assessment evaluating the potential inhalation asbestos exposure associated with the cosmetic talc consumer use scenario of powdering an infant during diapering, and found that risks were below levels associated with background asbestos exposures and risk. However, given the scope and age of the FDA's assessment, it was unknown whether the agency's conclusions remained relevant to current risk assessment practices, talc application scenarios, and exposure data. This analysis updates the previous FDA assessment by incorporating the current published exposure literature associated with consumer use of talcum powder and using the current U.S. Environmental Protection Agency's (EPA) nonoccupational asbestos risk assessment approach to estimate potential cumulative asbestos exposure and risk for four use scenarios: (1) infant exposure during diapering; (2) adult exposure from infant diapering; (3) adult exposure from face powdering; and (4) adult exposure from body powdering. The estimated range of cumulative asbestos exposure potential for all scenarios (assuming an asbestos content of 0.1%) ranged from 0.0000021 to 0.0096 f/cc-yr and resulted in risk estimates that were within or below EPA's acceptable target risk levels. Consistent with the original FDA findings, exposure and corresponding health risk in this range were orders of magnitude below upper-bound estimates of cumulative asbestos exposure and risk at ambient levels, which have not been associated with increased incidence of asbestos-related disease.

Proportion of mesothelioma attributable to living in industrially contaminated areas in Italy

Objectives The aim of this study was to estimate the attributable proportion (AP) of mesothelioma resulting from living in or close to major Italian industrially contaminated areas. Methods For populations living close to 39 sites of "national priority for remediation", incident mesothelioma cases were extracted from the Italian National Mesothelioma Registry (ReNaM) in the period 2000‒2011. Each site was classified in one of seven asbestos risk groups (RG) on the basis of the type of industrial plants. RG were ranked by the a priori evidence on asbestos risk. The AP for each RG was calculated as the meta-analytic estimate of AP of sites of the same group by gender and age class (0-64, 65-74, ≥75 years). The sex ratio (men/women) was computed for each RG. Results Among men, the AP by age class had the same gradient in each RG, with the highest values in the age class 0-64 years and the lowest in the ≥75 class; in the age class 0-64 years, the AP was positive in each RG, >90% in the presence of asbestos cement factories and harbors with shipyards. Among women, the overall AP decreased by RG, with negative values in the last two ranked RG; the AP by age class was variable without a definite gradient. The sex ratio was close to one only in the RG "only asbestos-cement factories"; the highest value (9.6) was observed in the age class 0-64 years in the RG "harbors with shipyard". Conclusions The integration of a geographic- and case-based approach provides valuable insights into occupational and environmental determinants of mesothelioma risk in industrially contaminated sites.

Communication and health education in communities experiencing asbestos risk and health impacts in Italy.

Numerous municipalities in Italy currently experience asbestos health impact, in particular excesses of pleural mesothelioma incidence and mortality. This paper presents an integrated analysis of epidemiological studies and communication actions in affected municipalities to highlight how communication has been implemented depending on health impact evidence and involvement of local stakeholders. Four case studies are identified concerning industrial and natural sources of asbestos exposure having different diseases burden. This integrated analysis benefited from multidisciplinary skills. Evidence of different stakeholders engagement is presented to emphasize their role in the communication process. Similarities and differences among case studies allowed us to identify lessons-learned to be transferred in other asbestos contaminated sites. The adoption of communication strategies and practices, since the very early evidence of asbestos health impact, represents a relevant contribution for epidemiological and health surveillance, particularly for those communities where asbestos health impact has only been recently reported.

A study of asbestos risk at some naturally occurring asbestos areas, Korea

A study of asbestos risk at some naturally occurring asbestos areas, Korea