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FLUX-BASED METHODS FOR DNAPL REMEDIATION DESIGN AND ASSESSMENT
Citation:
BROOKS, M., A. L. WOOD, S. RAO, R. FALTA, C. ENFIELD, AND N. BASU. FLUX-BASED METHODS FOR DNAPL REMEDIATION DESIGN AND ASSESSMENT. Presented at EPA Workshop, Washington, DC, September 20, 2007.
Impact/Purpose:
To present information at an EPA Workshop
Description:
One tool that has been investigated for use in DNAPL site characterization and remediation is mass flux (mass per unit area per unit time) and mass discharge (mass per unit time) measurements. These measurements, when collected across one or more control planes located down gradient of the DNAPL source zone provide an integrated measure of the strength of the source. This measurement is considered to possess more certainty than direct measurements of DNAPL distribution, and therefore provides a more robust means to prioritize efforts to remediate contaminated sites. Furthermore, these measurements provide a means with which to assess a priori the benefits of source zone remediation activity. This is accomplished by placing the mass discharge from the source zone in context of the attenuation capacity of the down gradient domain. The impact of partial mass removal on the contaminant plume is assessed through the linkage between source-zone mass removal and mass discharge. The purpose of this training course and document is to primarily address three questions: 1) why measure flux, 2) how to measure flux, and 3) how to use the flux measurement once it is obtained.