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Andres Prieto
Andres Prieto

Graduate Research Assistant
Virginia Polytechnic Institute and State University

Mr. Prieto obtained his Bachelor of Science degree in Geological Engineering at the University of the Andes (Venezuela) in 2013. He completed his Master of Science program in Hydrogeology and Environmental Geochemistry at Florida International University (Miami, FL) in 2016. He then worked for the Miami-Dade County as a Hydrogeologist until May 2017 before moving to Denver, CO. Mr. Prieto worked for Arcadis U.S., Inc. as a Remediation Engineer until July 2019 before moving to Blacksburg, VA to begin his PhD program in Civil (Environmental and Water Resources) Engineering focused on remediation of NAPL source zones using computational simulation.


PRESENTATION TITLE

Evaluation of remediation efforts at a chlorinated ethene-impacted site via numerical transport modeling and a volume-averaged modeling approach

Developing an optimal strategy to treat NAPL source zones requires a science-based methodology to evaluate outcomes of remedial technologies. Although analytical and numerical transport models provide tools to test remedial scenarios, the complexity of NAPL source zone architectures make remediation outcomes difficult to predict. Source zone models range from the overly simplistic screening models to computationally-intensive, comprehensive numerical simulators. The present work incorporates a novel volume-averaged modeling methodology to simulate mass discharge from a chlorinated ethene source zone resulting from engineered remedial actions to reduce NAPL mass. The efficacy of past in-situ remediation efforts, including pump & treat, chemical oxidation, enhanced bioremediation, and monitored natural attenuation were evaluated at the NSB Kings Bay (GA). A numerical transport model of the site served to validate the volume-averaged methodology through comparison with an extensive 20-year data set following source zone remediation. The models are employed to evaluate alternative combined remedial scenarios.


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