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Fate/Transport Modeling and Remediation of Contaminated Plume at Vance Airforce Base

by Avdhesh K. Tyagi, (F.ASCE), Oklahoma State Univ, Stillwater, United States,
Sharon H. Carpenter, Oklahoma State Univ, Stillwater, United States,



Document Type: Proceeding Paper

Part of: Hydraulic Engineering

Abstract:

Air Training Command (ATC) at Vance Air Force Base (VAFB) is responsible for implementing the Installation Restoration Program (IRP) according to the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA). The VAFB is a 1,829 acre, U.S. Department of Defense Facility operated by the U.S. Air Force. The base is located in Enid, Garfield County, Oklahoma. This paper presents the analyses of contaminated groundwater due to a leaking under-ground tank, UST No. 106. The results of quarterly samples collected are presented at the site over a two year period. Benzene was selected as a contaminant and its plume was tracked with time. The flow and fate/transport modeling was performed, using the two-dimensional model for flow and the method-of-characteristics model for fate/transport analysis of benzene plume. Simulations of plume migration were performed for 30 years. A pump and treat system consisting of pumping wells was introduced in the model to reduce the plume size in the aquifer. Five alternatives for groundwater remediation were considered in this paper including no action, hydraulic containment or well points, intercept trench or French drain, in-situ physical treatment system, and in-situ bioremediation. The pump-and-treat system was most suited for the site based on the economic analysis.

Subject Headings: Soil pollution | Groundwater pollution | Plumes | Pumps | Air pollution | Water pollution | Groundwater management | Oklahoma | United States

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