"The Natural Reduction of Threat in Selected Systems of Old Buildings Containing Asbestos"

Obmiński, Andrzej

doi:10.21203/rs.3.rs-581138/v1

Cited by 2 publications

(4 citation statements)

References 25 publications

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“…This does not mean an incorrect conclusion of the author's predecessors as to the risks in the buildings they tested, but the relativity of such assessments. It results from changes in the value of dust concentrations that occur over time [15,16] ].…”

Section: Discussionmentioning

confidence: 99%

“…The measured concentration of bres varies depending on the activity of new dust emission sources, the time that has passed between their formation and sampling, and the building's use, ventilation and generally their condition [14,15].…”

Section: Literature Review and Relation To The Author's Datamentioning

confidence: 99%

“…On the outer wall, from the outside, there is non-friable asbestoscement product containing 13% chrysotile asbestos, covered in corrugated sheet metal. Dozens of such buildings have been tested and described as part of ITB's research [15,16]. Two-or three-story buildings of this type designed for the construction back-up have a light, non-rigid (steel) structure, with external curtains and internal sandwich walls.…”

Section: Materials: Tested Buildingsmentioning

confidence: 99%

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Comparison of the effects of use, protection, improper renovation and removal of asbestos products on the example of typical old office buildings

Obmiński

2023

Preprint

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The study focused on old building types “LIPSK” and “BERLIN”, used since the 1960s in East Europe. The different operations of buildings were analysed: protection and maintenance of asbestos products, asbestos removal and inadvertent accidental damage to asbestos as a result of building renovation. Measurements of respirable asbestos fibres were carried out using the PCOM + PLM method and SEM-EDS. In the case of the accidental destruction of products, initial contamination was ≈ 7,000 f/m3. After some weeks of extreme ventilation, contamination decreased to about 500 f/m3. At the same time, in normally used that rooms, the pollution was above 4,000 f/m3. The average increase in pollution in a dozen or so similar buildings after asbestos removal in places beyond the work zones ranged from ≈ 1,700–2,700 f/m3 and lasted for one or two years. Old buildings, not renovated and in good condition, similar as protected by ACM products, maintained contamination at < 300 f/m3 for more than 10–20 last years. Due to the easy release of asbestos that occurs with any mechanical ACM destruction, there is an increased risk of occupant exposure in all areas of the building immediately following any renovation. Their implementation may be controversial.

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Section: Discussionmentioning

confidence: 99%

Section: Literature Review and Relation To The Author's Datamentioning

confidence: 99%

Section: Materials: Tested Buildingsmentioning

confidence: 99%

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Comparison of the effects of use, protection, improper renovation and removal of asbestos products on the example of typical old office buildings

Obmiński

2023

Preprint

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“…A simple conclusion showing the relationship between the scale of damage and the concentration of asbestos bres in the air is not obvious in every situation [22,23]. The concentration depends on many factors and does not always correspond to the visual observation of the scale of ACM damage, because some of them are immeasurable (e.g.…”

Section: Literature Data On Exposure Valuesmentioning

confidence: 99%

Environmental pollution as a result of a vacuum deficit in the working areas during asbestos removal work.

Obmiński

2024

Preprint

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The paper presents examples of the consequences of the lack of negative pressure in the work zone during asbestos removal. The results obtained for dust concentrations generated during these works in the work zone were relatively low compared to the literature data. This was due to the leakage of barriers restricting the work zone and the 'leakage' of dust. Therefore the asbestos content in the outdoor air in the vicinity of the renovated rooms was increasing. In the discussed cases, those works polluted the outdoor air for up to 15 m. The risk of asbestos dust content in the cleaned building outside the work area also increased. Those places often are not well controlled. Therefore, this may lead to long-term retention of asbestos dust in the facility despite the completion of the process of removing asbestos products from it. For example, non-friable asbestos- cement sheets removal in those work conditions increased contamination up to 3000 f/m3 outside the work zone. In the case of work with friable asbestos in building type “LIPSK”, contamination locally was up 21 000 f/m3. These values are above the average concentration of asbestos fibres in buildings of this type normally used and after works to correct asbestos removal (< 300–400 f/m3). Reported indoor air research results from the work zone in the case of the lack of negative pressure, without documented sampling conditions and contractor working methods, can falsely suggest a high standard of work quality.

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"The Natural Reduction of Threat in Selected Systems of Old Buildings Containing Asbestos"

Cited by 2 publications

References 25 publications

Comparison of the effects of use, protection, improper renovation and removal of asbestos products on the example of typical old office buildings

Comparison of the effects of use, protection, improper renovation and removal of asbestos products on the example of typical old office buildings

Environmental pollution as a result of a vacuum deficit in the working areas during asbestos removal work.

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