Short-term temporal variability of volatile contaminant concentrations in soil gas related to soil-atmosphere interface dynamics: Two case studies in the Veneto region (Italy).
Barometric pumping
Contaminated sites
Risk assessment
Short‐term variability
Soil gas
Journal
Integrated environmental assessment and management
ISSN: 1551-3793
Titre abrégé: Integr Environ Assess Manag
Pays: United States
ID NLM: 101234521
Informations de publication
Date de publication:
07 Aug 2024
07 Aug 2024
Historique:
revised:
05
06
2024
received:
20
11
2023
accepted:
08
07
2024
medline:
7
8
2024
pubmed:
7
8
2024
entrez:
7
8
2024
Statut:
aheadofprint
Résumé
The study of the variability of soil gas concentrations is crucial for defining effective monitoring and remediation strategies and for the risk assessment related to the emission of vapors from the subsurface. The traditional soil gas monitoring strategy consists of seasonal surveys based on short-time-averaged sampling. Soil gas monitoring results are often used to assess the risk associated with the emission of volatile contaminants from the subsurface, using models mainly based on molecular diffusion and therefore assuming continuous emission from the soil. At two contaminated sites located in the Veneto region (Italy), continuous monitoring using a photoionization detector, pressure gauges, and an ultrasonic anemometer was used to relate soil gas variability to surface and subsurface physical parameters. At both sites a cyclic diurnal variation of volatile organic compounds concentration in soil gas was observed, correlated with the variation of several meteorological parameters and in particular with the variation of the differential pressure between soil and atmosphere and the buoyancy vertical flux. These findings question the reliability of the conventional methodology employed in the collection and assessment of soil gas data. Integr Environ Assess Manag 2024;00:1-10. © 2024 SETAC.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
© 2024 SETAC.
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