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. 1 <br /> Brian T. Frus ® Page 1 of 2 <br /> Project: 310-01.04 <br /> Date: January 28, 1993 <br /> This program uses the radial flow equation, to estimate soil permeability <br /> given flow rate, well vacuum, radius of influence and well construction data. <br /> Oncea value for permeability is determined, a plot of flow rate versus <br /> vacuum is generated. Field step test data is shown on the same plot for <br /> comparison. <br /> Define Major Parameters for extraction Probe 1 <br /> n 3 Number of data sets (including step test data) <br /> i := 0 . .n - 1 Range Variable Used for Calculations <br /> H 1- ft Screened Interval <br /> kg <br /> p 0.000018- J Air Viscosity <br /> m sec <br /> Patm := 1- atm Atmospheric Pressure - Absolute <br /> Rw .625- in Well Radius <br /> Ri 14- ft Radius of Influence <br /> Q = 2• cfm Flow Rate <br /> i <br /> Pwg i Well Pressure - Gauge <br /> 184- in H2O Convert Gauge Pressure to Absolute: <br /> 85 in H2O <br /> 90 in H2O PW := Patm - Pwg <br /> i i <br /> Solve Radial Flow Equation for k (permeability) <br /> IRI <br /> Rw11 kdarcy <br /> Q µ lnJ i <br /> kdarcy = i1�� darCV <br /> i H 1 2.099 <br /> Patm 2.071 <br /> Pw 1.0 - — 1.939 <br /> i PW <br /> i <br /> Note: Permeability in darcies (1 darcy = 1*10--8 cm-2) <br />