Field validation of radon monitoring as a screening methodology for NAPL-contaminated sites

García González, Jerónimo Emilio and Ortega, Marcelo F. and Chacón Oreja, Enrique and Mazadiego Martínez, Luis Felipe and Miguel García, Eduardo de (2008). Field validation of radon monitoring as a screening methodology for NAPL-contaminated sites. "Applied Geochemistry", v. 23 (n. 9); pp. 2753-2758. ISSN 0883-2927. https://doi.org/10.1016/j.apgeochem.2008.06.020.

Description

Title: Field validation of radon monitoring as a screening methodology for NAPL-contaminated sites
Author/s:
  • García González, Jerónimo Emilio
  • Ortega, Marcelo F.
  • Chacón Oreja, Enrique
  • Mazadiego Martínez, Luis Felipe
  • Miguel García, Eduardo de
Item Type: Article
Título de Revista/Publicación: Applied Geochemistry
Date: September 2008
Volume: 23
Subjects:
Freetext Keywords: Field validation, radon, NAPL, subsurface contamination.
Faculty: E.T.S.I. Minas (UPM)
Department: Explotación de Recursos Minerales y Obras Subterráneas [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Screening methodologies aim at improving knowledge about subsurface contamination processes before expensive intrusive operations, i.e. drilling and core-sampling, well installation and development, sampling of groundwater and free-phase product, are implemented. Blind field tests carried out at a hydrocarbon storage and distribution center in NE Spain suggest that Rn monitoring can be effectively used to locate the boundaries of subsurface accumulations of NAPLs. Sixty seven measurements of Rn in soil air were performed with a SARAD RTM 2100 current-ionization alpha-particle spectrometer following a 10 m square grid. Reductions of 222Rn concentration above a pool of LNAPL due to the preferential partition of Rn into the organic phase were spatially analyzed and resolved to yield the surface contour of the NAPL source zone. This surface trace of the source zone agreed well with the extent and situation inferred from measurements of free-phase thickness taken at eight monitoring wells at the site. Moreover, the good repeatability (as measured by replicate measurements at the same sampling point) and spatial resolution of the technique suggest that the boundaries of the plume can be delineated at the sub-decametre level.

More information

Item ID: 2306
DC Identifier: http://oa.upm.es/2306/
OAI Identifier: oai:oa.upm.es:2306
DOI: 10.1016/j.apgeochem.2008.06.020
Official URL: http://www.elsevier.com/wps/find/journaldescription.cws_home/768/description#description
Deposited by: Memoria Investigacion
Deposited on: 20 May 2010 10:34
Last Modified: 20 Apr 2016 12:03
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