Prediction of Groundwater Quality Down-gradient of In Situ Permeable Treatment Barriers and Fully-remediated Source Zones
2008
Johnson, Paul C. | Dahlen, Paul | Carlson, Pamela M.
The original document contains color images. Prepared in cooperation with CH2M Hill. Sponsored in part by the Environmental Security Technology Certification Program Office (DoD), ESTCP Project ER-0320.
Show more [+] Less [-]In situ permeable treatment barriers (PTBs) are designed such that contaminated groundwater flows through an engineered treatment zone within which contaminants are eliminated or the concentrations are significantly reduced. These systems are often considered for the containment of dissolved contaminant plumes, or for controlling the discharge and larger-scale impact of dissolved contaminants from source zones to aquifers. Previous studies have concluded that a better understanding of the subsequent improvement in down-gradient groundwater quality with time is needed. The objectives of this project were to: a) propose a practicable approach that can be used to project reasonable order-of magnitude estimates of groundwater quality improvements with time down-gradient of a PTB, b) conduct detailed monitoring and characterization down-gradient of a well-understood PTB site, and c) illustrate and reflect on the use of the proposed approach for the PTB system studied in this project.
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