Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution
Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations gener...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Rios Mora, Juan Sebastian [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A - Li, Huilin ELSEVIER, 2018, the international journal of building science and its applications, New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:207 ; year:2022 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.buildenv.2021.108397 |
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| 520 | |a Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. | ||
| 520 | |a Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. | ||
| 650 | 7 | |a Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion |2 Elsevier | |
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| 700 | 1 | |a Diallo, Thierno |4 oth | |
| 700 | 1 | |a Abadie, Marc |4 oth | |
| 700 | 1 | |a Limam, Karim |4 oth | |
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10.1016/j.buildenv.2021.108397 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001604.pica (DE-627)ELV056016530 (ELSEVIER)S0360-1323(21)00794-0 DE-627 ger DE-627 rakwb eng 570 VZ Rios Mora, Juan Sebastian verfasserin aut Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion Elsevier Collignan, Bernard oth Diallo, Thierno oth Abadie, Marc oth Limam, Karim oth Enthalten in Elsevier Li, Huilin ELSEVIER Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A 2018 the international journal of building science and its applications New York, NY [u.a.] (DE-627)ELV000477206 volume:207 year:2022 pages:0 https://doi.org/10.1016/j.buildenv.2021.108397 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 207 2022 0 |
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10.1016/j.buildenv.2021.108397 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001604.pica (DE-627)ELV056016530 (ELSEVIER)S0360-1323(21)00794-0 DE-627 ger DE-627 rakwb eng 570 VZ Rios Mora, Juan Sebastian verfasserin aut Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion Elsevier Collignan, Bernard oth Diallo, Thierno oth Abadie, Marc oth Limam, Karim oth Enthalten in Elsevier Li, Huilin ELSEVIER Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A 2018 the international journal of building science and its applications New York, NY [u.a.] (DE-627)ELV000477206 volume:207 year:2022 pages:0 https://doi.org/10.1016/j.buildenv.2021.108397 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 207 2022 0 |
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10.1016/j.buildenv.2021.108397 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001604.pica (DE-627)ELV056016530 (ELSEVIER)S0360-1323(21)00794-0 DE-627 ger DE-627 rakwb eng 570 VZ Rios Mora, Juan Sebastian verfasserin aut Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion Elsevier Collignan, Bernard oth Diallo, Thierno oth Abadie, Marc oth Limam, Karim oth Enthalten in Elsevier Li, Huilin ELSEVIER Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A 2018 the international journal of building science and its applications New York, NY [u.a.] (DE-627)ELV000477206 volume:207 year:2022 pages:0 https://doi.org/10.1016/j.buildenv.2021.108397 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 207 2022 0 |
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10.1016/j.buildenv.2021.108397 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001604.pica (DE-627)ELV056016530 (ELSEVIER)S0360-1323(21)00794-0 DE-627 ger DE-627 rakwb eng 570 VZ Rios Mora, Juan Sebastian verfasserin aut Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion Elsevier Collignan, Bernard oth Diallo, Thierno oth Abadie, Marc oth Limam, Karim oth Enthalten in Elsevier Li, Huilin ELSEVIER Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A 2018 the international journal of building science and its applications New York, NY [u.a.] (DE-627)ELV000477206 volume:207 year:2022 pages:0 https://doi.org/10.1016/j.buildenv.2021.108397 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 207 2022 0 |
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10.1016/j.buildenv.2021.108397 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001604.pica (DE-627)ELV056016530 (ELSEVIER)S0360-1323(21)00794-0 DE-627 ger DE-627 rakwb eng 570 VZ Rios Mora, Juan Sebastian verfasserin aut Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. Gas soil transfer · indoor air quality · lateral source/building distance · numerical study · polluted soils · vapor intrusion Elsevier Collignan, Bernard oth Diallo, Thierno oth Abadie, Marc oth Limam, Karim oth Enthalten in Elsevier Li, Huilin ELSEVIER Integration-free reprogramming of human umbilical arterial endothelial cells into induced pluripotent stem cells IHSTMi001-A 2018 the international journal of building science and its applications New York, NY [u.a.] (DE-627)ELV000477206 volume:207 year:2022 pages:0 https://doi.org/10.1016/j.buildenv.2021.108397 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 207 2022 0 |
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However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. 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numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution |
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Numerical analysis of vapor intrusion from the ground into buildings in the presence of lateral sources of pollution |
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Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. |
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Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. |
| abstract_unstemmed |
Various screening-level and analytical models have been proposed in order to evaluate Vapor Intrusion (VI) and provide assessment tools for exposure risk in indoor environments. However, many in situ investigations show important differences between predicted and measured indoor concentrations generally associated with inappropriate conceptual modelling, incomplete VI process or by ignoring critical parameters in the evaluations. In this study, a numerical model is developed to better understand how polluted site characteristics as source position, soil properties, building pressure and type of construction may affect VI process from non-degrading chemicals. The results confirm that source location plays a critical role on VI compared to soil properties and building features. Increasing lateral distance from a building decreases indoor concentration about 5 orders of magnitude when the source is shallow and 2 to 3 orders of magnitude for deeper sources. However, despite the main influence of the position of the source, soil properties and building characteristics impacts are not insignificant: building pressure (−4 Pa) may increase VI by a factor of 2 compared to building at atmospheric pressure, slab on grade construction types increase vapor attenuation of 80% compare to a bare ground configuration and permeable soils may allow vapors to migrate more easily to the building by generating an indoor concentration up to 10 times higher compared to impermeable soils. Current VI models including lateral separation, generally adopted in polluted site engineering, are unable to consider those influencing parameters, especially building features, and thus need to be extended to improve the management of contaminated land before building constructions. |
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