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u= well function parameter , determined from tables of u vs W(u) ( e.g. Freeze and Cherry, 1979, Table 8 . 1 } t= time (duration) of pumping ( s ) S= specific yield (dimensionless ) At the radius of influence "R" , the value of (ho-h) is , by definition, very small . To determine "R" , w( u) is first ' determined, "K" is used from the Hvorslev Method, (h -h) is set at 0 . 01 m, and "Q" is set to the rate of water extraction needed for the bioreactor proposed for use on site ( 3-4 gallons/hr) . After calculating W(u) , "u" is determined from �� tables of W(u) vs u, and the equation is solved for R t is set at 2 weeks ( for example) , and "S" is estimated from tables showing ranges of specific yield for sediments of various grain sizes ( e .g. Fetter, 1988 , Table 4 . 2 ) . The hydraulic conductivities as calculated, porosities , aquifer thickness , the contamination levels as described in well logs and reports of laboratory analyses , and the calculated gradient will be introduced into the SUTRA software program. r SUTRA ( Saturated-Unsaturated Transport ) Is a computer program created by the U.S . Geological Survey in cooperation with the U . S . Air Force that simulates fluid movement and the transport of either energy or dissolved substances in a subsurface environment. The model employs a two-dimensional hybrid finite-element and integrated finite-difference method to ' approximate the governing equations that describe the processes that are simulated. SUTRA provides fluid pressures and solute concentrations as they vary with time, everywhere in the simulated subsurface system. SUTRA flow simulation may be employed for areal and cross-sectional modeling of saturated groundwater flow systems, and for cross-sectional modeling of unsaturated zone flow. Solute transport simulations using SUTRA may be employed to model natural of man-induced chemical species transport including processes of solute sorption, production and decay, and may r be applied to analyze groundwater contaminant transport problems and aquifer restoration design. Solute transport simulation with SUTRA may be used for modeling of variable density leachate ' movement . Using SUTRA, a pumping simulation will be developed to predict ' the time necessary to remediate the site. The final remediation design will depend upon the results obtained from these calculations . ' It is proposed that upon its extraction, groundwater be delivered to a surface storage tank. This water would then be delivered II .