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A RIGOROUS DEMONSTRATION OF PERMEABILITY ENHANCEMENT TECHNOLOGY FOR IN SITU REMEDIATION OF LOW PERMEABILITY MEDIA
Sorenson, K., D. Nguyen, R. Wymore, and N. Smith.
ESTCP Project ER-201430, 651 pp, 2019

A hybrid pneumatic permeability enhancement technology was pilot tested to facilitate amendment delivery and distribution at 3 sites with low-permeability lithologies: Marine Corps Base-Camp Pendleton (MCB-CP), Lake City Army Ammunition Plant (LCAAP) Site 17D, and the Grand Forks Air Force Base (GFAFB) site TU594. The overall objective was to compare the performance and cost benefits of hydraulic and hybrid pneumatic permeability enhancement for in situ treatment at low-permeability sites. Advanced geophysics monitoring tools evaluated the vertical and horizontal extent of amendment distribution, and measurements were validated by conventional soil confirmation and groundwater performance monitoring. The technology achieved 99-100% of the target injection within the treatment areas at MCB-CP and GFAFB, and 70% at LCAAP despite challenging subsurface conditions. A cost comparison exercise indicated that permeability enhancement techniques can be more or significantly more competitive than conventional injection techniques. https://www.serdp-estcp.org/content/download/49513/472045/file/ER-201430%20Final%20Report.pdf



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