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r r.: <br /> 1• H. KLEINFELDER &ASSOCIATES <br /> 4U <br /> 3.1 GROUND WATER MODELING <br /> s� Ground water modeling utilizes known conditions and predicted operating <br /> t " variable parameters to evaluate hypothetical results. Ground water <br /> ,w modeling is an essential element to the overall remediation program to <br /> i determine the total mass (gallons) of contaminated ground water, the <br /> optimum location of extraction well(s), the necessary information for <br /> I , treatment system design, and expected time frame for system operation. <br /> `LLQ OBJECTIVES <br /> Et <br /> Utilization of ground water modeling techniques used in remedial action <br /> s � activities will: <br /> o Allow for the optimization of flow rates and operating system <br /> t parameters <br /> o Assure capture of contaminant plume <br /> o Describe the aerial extent of extraction system influence <br /> o Provide "fine-tuning== of extraction. schemes, i.e., predict <br /> ►" outcome of varying flow rates or indicate if and where additional <br /> extraction wells are required <br /> APPROACH <br /> w, <br /> The application model will be developed using a well-documented, public <br /> domain finite difference model, i.e., USGS three dimensional Model or the <br /> Prickett-Lundquist model, which is adaptable to solute transport modeling. <br /> The. study area will be divided into a finite difference or nodal grid, <br /> with values assigned for transmisstivities and storage coefficients. A <br /> series of separate equations will be developed to determine hydraulic <br /> head, from which flow directions are derived. additionally, potential <br /> 33-87-887 5 <br />