Empirical assessment of ground water-to-indoor air attenuation factors for the CDOT-MTL denver site

P. C. Johnson, R. A. Ettinger, J. P. Kurtz, R. Bryan, J. E. Kester

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The area surrounding the Colorado Department of Transportation Materials Testing Laboratory in Denver was the subject of intense investigation, involving the collection of thousands of ground water, soil-gas, and indoor air samples in order to investigate indoor air impacts associated with a subsurface release of chlorinated solvents. The preremediation portion of that data set is analyzed and reduced in this work to ground water-to-indoor air attenuation factors (α gw = the ratio of the measured indoor air concentration to the soil-gas concentration predicted to be in equilibrium with the local ground water concentration). The empirical α gw values for this site range from about 10 -6 to 10 -4 with an overall average of 3 × 10 -5 (μg/L indoor air)/(μg/L soil gas). The analysis of this data set highlights the need for a thorough data review and data screening when using large data sets to derive empirical relationships between subsurface concentrations and indoor air. More specifically, it is necessary to identify those parts of the data that contain a strong vapor intrusion pathway signal, which generally will require concentrations well above reported detection levels combined with spatial or temporal correlation of subsurface and indoor concentrations.

Original languageEnglish (US)
Pages (from-to)153-158
Number of pages6
JournalGround Water Monitoring and Remediation
Volume29
Issue number1
DOIs
StatePublished - Jan 2009

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indoor air
Groundwater
groundwater
soil gas
Air
Soils
Materials testing laboratories
Gases
Screening
Vapors

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Water Science and Technology

Cite this

Empirical assessment of ground water-to-indoor air attenuation factors for the CDOT-MTL denver site. / Johnson, P. C.; Ettinger, R. A.; Kurtz, J. P.; Bryan, R.; Kester, J. E.

In: Ground Water Monitoring and Remediation, Vol. 29, No. 1, 01.2009, p. 153-158.

Research output: Contribution to journalArticle

Johnson, P. C. ; Ettinger, R. A. ; Kurtz, J. P. ; Bryan, R. ; Kester, J. E. / Empirical assessment of ground water-to-indoor air attenuation factors for the CDOT-MTL denver site. In: Ground Water Monitoring and Remediation. 2009 ; Vol. 29, No. 1. pp. 153-158.
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