Accession Number : ADA305637

Title :   Validation Testing a Contaminant Transport and Natural Attenuation Simulation Model Using Field Data.

Descriptive Note : Master's thesis,

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s) : Flier, Steven J.

PDF Url : ADA305637

Report Date : DEC 1995

Pagination or Media Count : 122

Abstract : This research extends the work begun by Enyeart (1994) which evaluated the process of intrinsic bioremediation, and which developed a model for predicting the velocity of an aerobic degradation front, as it traverses the length of a JP-4 contaminant plume. It is assumed this aerobic front will traverse the contaminant plume as dissolved oxygen is carried by the ground water through the sorption-retarded contaminant. The ultimate purpose of Enyeart's model is to use it to develop field guidance for assessing the feasibility of intrinsic bioremediation to restore petroleum-contaminated soils. After simulating intrinsic bioremediation many times with a spreadsheet model, results were used to develop a linear regression model to predict the velocity of the aerobic front, and thus the time it takes to propagate through from the rear to the front of the simulated plume. The time needed for the aerobic front to travel from the rear to the front of the plume is taken as the time to contaminant remediation. In the present work, Enyeart' 5 model was validity tested by comparing its output prediction with field measured values. A methodology was developed to compare the model output with field measured data. The results were analyzed, and the results of this first stage of validity testing show a reasonable basis for accepting the model. Further validity testing of the model will be required to assess its performance across a wide range of field conditions. It is hoped that contaminated-site managers will one day use the validated regression model to predict the time required to affect the complete remediation of a contaminated site via intrinsic bioremediation. (AN)

Descriptors :   *GROUND WATER, *BIODEGRADATION, *FUEL CONTAMINATION, VELOCITY, DATA BASES, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, BENZENE, VALIDATION, CHEMICAL CONTAMINATION, THESES, OXYGEN, WATER POLLUTION, INTERPOLATION, SAMPLING, ATTENUATION, XYLENES, AVIATION FUELS, AIR FORCE FACILITIES, PLUMES, SOIL POLLUTION, SOIL CHEMISTRY, LINEAR REGRESSION ANALYSIS, ELECTRON ACCEPTORS, DYNAMIC PROGRAMMING, JET ENGINE FUELS, AEROBIC PROCESSES, SOIL TESTS, CONCENTRATION(CHEMISTRY), DISSOLVING, FIELD CONDITIONS, OXIDATION REDUCTION REACTIONS, TOLUENES, HYDROGEOLOGY.

Subject Categories : Water Pollution and Control
      Soil Mechanics
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE